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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;
// solhint-disable one-contract-per-file

import { ERC165Checker } from "@openzeppelin/contracts/utils/introspection/ERC165Checker.sol";
import { IERC165Upgradeable } from "@openzeppelin/contracts-upgradeable/utils/introspection/IERC165Upgradeable.sol";
import { ERC1155Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC1155/ERC1155Upgradeable.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

import {
    IConditionalTokens,
    IConditionalTokensV1_2,
    ConditionalTokensBase,
    ILegConditionalTokens
} from "./ConditionalTokens.sol";
import { ParlayLegs, IParlayConditionalTokens, IParlayConditionalTokensEvents } from "./IParlayConditionalTokens.sol";
import { ParlayConditionalTokensErrors } from "./ParlayConditionalTokensErrors.sol";
import { ConditionID, QuestionID, CTHelpers } from "./CTHelpers.sol";

contract ParlayConditionalTokensStorage {
    struct LegInfo {
        ConditionID[] legConditionIds;
        uint256[] indices; // TODO: this can be packed
    }
    /// @dev conditional tokens for individual legs

    IConditionalTokensV1_2 public legConditionalTokens;
    /// @dev storage associating parlay conditon ID with underlying leg info
    mapping(ConditionID => LegInfo) internal legInfo;

    uint256[50] private __gap;
}

contract ParlayConditionalTokens is
    IConditionalTokensV1_2,
    IParlayConditionalTokens,
    IParlayConditionalTokensEvents,
    ConditionalTokensBase,
    ParlayConditionalTokensStorage,
    ParlayConditionalTokensErrors
{
    using ERC165Checker for address;

    bytes4 private constant CONDITIONAL_TOKENS_INTERFACE_V1_2_ID = 0x306da52d;
    bytes4 private constant LEG_CONDITIONAL_TOKENS_INTERFACE_ID = 0x58f1a282;

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() {
        _disableInitializers();
    }

    // solhint-disable-next-line no-empty-blocks
    function _authorizeUpgrade(address) internal override onlyOwner { }

    // solhint-disable-next-line ordering
    function initialize(address legConditionalTokens_) public initializer {
        __ConditionalTokensBase_init();

        legConditionalTokens = IConditionalTokensV1_2(legConditionalTokens_);
    }

    /// @inheritdoc	IParlayConditionalTokens
    function getParlayQuestionId(
        address legOracle,
        QuestionID[] calldata legQuestionIds,
        uint256 legQuestionIdMask,
        uint256[] calldata legIndices
    ) public pure returns (QuestionID parlayQuestionId) {
        // TODO: read up on calldatacopy and sha3 assembly
        // https://blog.openzeppelin.com/ethereum-in-depth-part-2-6339cf6bddb9

        parlayQuestionId =
            QuestionID.wrap(keccak256(abi.encode(legOracle, legQuestionIds, legQuestionIdMask, legIndices)));
    }

    function getParlayConditionId(QuestionID parlayQuestionId) public pure returns (ConditionID parlayConditionId) {
        parlayConditionId = CTHelpers.getConditionId(address(0x0), parlayQuestionId, PARLAY_OUTCOME_SLOT_COUNT);
    }

    // if statements for reverts are being counted against cyclomatic complexity
    // solhint-disable-next-line code-complexity
    function _checkParlayPreconditions(address legOracle, uint256 legQuestionIdMask, ParlayLegs calldata legs)
        private
        view
        returns (ConditionID[] memory legConditionIds)
    {
        {
            bool invalidLengths = legs.questionIds.length != legs.indices.length
                || legs.questionIds.length != legs.outcomeSlotCounts.length || legs.questionIds.length < 2;
            if (invalidLengths) revert InvalidParlayArraySizes();
        }
        
        {
            // Delaying the interface check until here, because of
            // chicken-and-egg issue with deploying new conditional tokens. Old
            // conditional tokens did not have a `supportsInterface` method, so
            // need to be upgraded to the latest version. However, upgrading the
            // proxy is an admin action, and deployment is permissionless. So
            // have to delay the check until after construction
            bool supportsInterfaces = legConditionalTokens.supportsInterface(CONDITIONAL_TOKENS_INTERFACE_V1_2_ID)
                && legConditionalTokens.supportsInterface(LEG_CONDITIONAL_TOKENS_INTERFACE_ID);
            if (!supportsInterfaces) revert InvalidConditionalTokensAddress(address(legConditionalTokens));
        }

        // Limitation of at most 19 conditions. This is due to overflow issues
        // when calculating the price/payout for the outcomes
        if (legs.questionIds.length > 19) revert TooManyConditionsInParlay();
        if (legQuestionIdMask == 0x0) revert InvalidQuestionIdMask();

        // Validate canonical ordering, and that underlying conditions exist
        uint256 prevMaskedId = 0x0;
        legConditionIds = new ConditionID[](legs.questionIds.length);
        for (uint256 i = 0; i < legs.questionIds.length; i++) {
            uint256 outcomeSlotCount = legs.outcomeSlotCounts[i];
            if (legs.indices[i] >= outcomeSlotCount) revert InvalidIndex();

            // Leg ordering is only done with repsect to a bitmasked portion
            // of the questionId. That way it's possible to disallow having
            // parlay legs within the same "category", such as for the same
            // event. This requires the `questionId` to be of a standard
            // form where particular bytes of the id correspond to an
            // eventId for example.
            QuestionID legQuestionId = legs.questionIds[i];
            uint256 maskedId = uint256(QuestionID.unwrap(legQuestionId)) & legQuestionIdMask;
            if (maskedId <= prevMaskedId) revert ParlayInputsNotInCanonicalOrder();
            prevMaskedId = maskedId;

            ConditionID legConditionId = CTHelpers.getConditionId(legOracle, legQuestionId, outcomeSlotCount);
            if (legConditionalTokens.getOutcomeSlotCount(legConditionId) != outcomeSlotCount) {
                revert ConditionNotFound();
            }
            if (legConditionalTokens.isResolved(legConditionId)) revert PayoutAlreadyReported();
            legConditionIds[i] = legConditionId;
        }
    }

    /// @inheritdoc	IParlayConditionalTokens
    function prepareParlayCondition(address legOracle, uint256 legQuestionIdMask, ParlayLegs calldata legs)
        external
        returns (QuestionID parlayQuestionId, ConditionID parlayConditionId)
    {
        // Synthetic QuestionID from the parlay legs.
        parlayQuestionId = getParlayQuestionId(legOracle, legs.questionIds, legQuestionIdMask, legs.indices);
        parlayConditionId = prepareCondition(address(0x0), parlayQuestionId, PARLAY_OUTCOME_SLOT_COUNT);

        // TODO optimize if already created?
        // If parlay already defined, just return it
        {
            ConditionID[] memory legConditionIds = _checkParlayPreconditions(legOracle, legQuestionIdMask, legs);
            legInfo[parlayConditionId] = LegInfo(legConditionIds, legs.indices);
        }

        emit ParlayConditionLegs(parlayConditionId, parlayQuestionId, legOracle, legQuestionIdMask, legs);
    }

    /// @inheritdoc	IParlayConditionalTokens
    function reportParlayPayouts(QuestionID parlayQuestionId) public {
        ConditionID parlayConditionId = getParlayConditionId(parlayQuestionId);

        if (payoutNumerators[parlayConditionId].length != PARLAY_OUTCOME_SLOT_COUNT) revert ConditionNotFound();
        if (isResolved(parlayConditionId)) return;

        (uint256[] memory numerators, uint256 denominator) = ILegConditionalTokens(address(legConditionalTokens))
            .getParlayPayouts(legInfo[parlayConditionId].legConditionIds, legInfo[parlayConditionId].indices);
        _reportPayouts(address(0x0), parlayQuestionId, numerators, denominator);
    }

    /// @inheritdoc	IParlayConditionalTokens
    function batchReportParlayPayouts(QuestionID[] calldata parlayQuestionIds) external {
        for (uint256 i = 0; i < parlayQuestionIds.length; i++) {
            reportParlayPayouts(parlayQuestionIds[i]);
        }
    }

    function getFairPrices(ConditionID parlayConditionId) public view returns (uint256[] memory fairPriceDecimals) {
        return ILegConditionalTokens(address(legConditionalTokens)).getParlayFairPrices(
            legInfo[parlayConditionId].legConditionIds, legInfo[parlayConditionId].indices
        );
    }

    function isHalted(ConditionID parlayConditionId) external view returns (bool halted) {
        ConditionID[] memory legConditionIds = legInfo[parlayConditionId].legConditionIds;
        for (uint256 i = 0; i < legConditionIds.length && !halted; i++) {
            halted = legConditionalTokens.isHalted(legConditionIds[i]);
        }
    }

    function getPositionInfo(address account, IERC20 collateralToken, ConditionID conditionId)
        external
        view
        returns (uint256[] memory balances, uint256[] memory fairPriceDecimals)
    {
        balances = balanceOfCondition(account, collateralToken, conditionId);
        fairPriceDecimals = getFairPrices(conditionId);
    }

    // ----------------------
    // The following functions do not make sense for parlay conditions

    function reportPayouts(QuestionID, uint256[] calldata) external pure {
        revert OperationNotSupportedWithoutLegInformation();
    }

    function batchReportPayouts(QuestionID[] calldata, uint256[] calldata, uint256[] calldata) external pure {
        revert OperationNotSupportedWithoutLegInformation();
    }

    // TODO disallow prepareCondition without leg info

    function prepareConditionByOracle(QuestionID, uint256, bytes calldata, uint32)
        external
        pure
        returns (ConditionID)
    {
        revert OperationNotSupportedForParlayConditions();
    }

    function updateFairPrices(ConditionID, bytes calldata) external pure {
        revert OperationNotSupportedForParlayConditions();
    }

    function batchUpdateFairPrices(PriceUpdate[] calldata) external pure {
        revert OperationNotSupportedForParlayConditions();
    }

    function getPriceOracle(ConditionID) external pure returns (address) {
        revert OperationNotSupportedForParlayConditions();
    }

    function updateHaltTime(ConditionID, uint32) external pure {
        revert OperationNotSupportedForParlayConditions();
    }

    function batchUpdateHaltTimes(HaltUpdate[] calldata) external pure {
        revert OperationNotSupportedForParlayConditions();
    }

    // TODO: move into Base?
    function getPayouts(ConditionID conditionId)
        external
        view
        returns (uint256[] memory numerators, uint256 denominator)
    {
        numerators = payoutNumerators[conditionId];
        denominator = payoutDenominator[conditionId];
    }

    // TODO: this could technically be supported - it is the minimum halt time of any leg
    function haltTime(ConditionID) external pure returns (uint32) {
        revert OperationNotSupportedForParlayConditions();
    }

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(IERC165Upgradeable, ERC1155Upgradeable)
        returns (bool)
    {
        return interfaceId == type(IConditionalTokens).interfaceId
            || interfaceId == type(IConditionalTokensV1_2).interfaceId
            || interfaceId == type(IParlayConditionalTokens).interfaceId
            || ERC1155Upgradeable.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.2) (utils/introspection/ERC165Checker.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Library used to query support of an interface declared via {IERC165}.
 *
 * Note that these functions return the actual result of the query: they do not
 * `revert` if an interface is not supported. It is up to the caller to decide
 * what to do in these cases.
 */
library ERC165Checker {
    // As per the EIP-165 spec, no interface should ever match 0xffffffff
    bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;

    /**
     * @dev Returns true if `account` supports the {IERC165} interface.
     */
    function supportsERC165(address account) internal view returns (bool) {
        // Any contract that implements ERC165 must explicitly indicate support of
        // InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
        return
            supportsERC165InterfaceUnchecked(account, type(IERC165).interfaceId) &&
            !supportsERC165InterfaceUnchecked(account, _INTERFACE_ID_INVALID);
    }

    /**
     * @dev Returns true if `account` supports the interface defined by
     * `interfaceId`. Support for {IERC165} itself is queried automatically.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
        // query support of both ERC165 as per the spec and support of _interfaceId
        return supportsERC165(account) && supportsERC165InterfaceUnchecked(account, interfaceId);
    }

    /**
     * @dev Returns a boolean array where each value corresponds to the
     * interfaces passed in and whether they're supported or not. This allows
     * you to batch check interfaces for a contract where your expectation
     * is that some interfaces may not be supported.
     *
     * See {IERC165-supportsInterface}.
     *
     * _Available since v3.4._
     */
    function getSupportedInterfaces(address account, bytes4[] memory interfaceIds)
        internal
        view
        returns (bool[] memory)
    {
        // an array of booleans corresponding to interfaceIds and whether they're supported or not
        bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length);

        // query support of ERC165 itself
        if (supportsERC165(account)) {
            // query support of each interface in interfaceIds
            for (uint256 i = 0; i < interfaceIds.length; i++) {
                interfaceIdsSupported[i] = supportsERC165InterfaceUnchecked(account, interfaceIds[i]);
            }
        }

        return interfaceIdsSupported;
    }

    /**
     * @dev Returns true if `account` supports all the interfaces defined in
     * `interfaceIds`. Support for {IERC165} itself is queried automatically.
     *
     * Batch-querying can lead to gas savings by skipping repeated checks for
     * {IERC165} support.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
        // query support of ERC165 itself
        if (!supportsERC165(account)) {
            return false;
        }

        // query support of each interface in interfaceIds
        for (uint256 i = 0; i < interfaceIds.length; i++) {
            if (!supportsERC165InterfaceUnchecked(account, interfaceIds[i])) {
                return false;
            }
        }

        // all interfaces supported
        return true;
    }

    /**
     * @notice Query if a contract implements an interface, does not check ERC165 support
     * @param account The address of the contract to query for support of an interface
     * @param interfaceId The interface identifier, as specified in ERC-165
     * @return true if the contract at account indicates support of the interface with
     * identifier interfaceId, false otherwise
     * @dev Assumes that account contains a contract that supports ERC165, otherwise
     * the behavior of this method is undefined. This precondition can be checked
     * with {supportsERC165}.
     *
     * Some precompiled contracts will falsely indicate support for a given interface, so caution
     * should be exercised when using this function.
     *
     * Interface identification is specified in ERC-165.
     */
    function supportsERC165InterfaceUnchecked(address account, bytes4 interfaceId) internal view returns (bool) {
        // prepare call
        bytes memory encodedParams = abi.encodeWithSelector(IERC165.supportsInterface.selector, interfaceId);

        // perform static call
        bool success;
        uint256 returnSize;
        uint256 returnValue;
        assembly {
            success := staticcall(30000, account, add(encodedParams, 0x20), mload(encodedParams), 0x00, 0x20)
            returnSize := returndatasize()
            returnValue := mload(0x00)
        }

        return success && returnSize >= 0x20 && returnValue > 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165Upgradeable {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC1155/ERC1155.sol)

pragma solidity ^0.8.0;

import "./IERC1155Upgradeable.sol";
import "./IERC1155ReceiverUpgradeable.sol";
import "./extensions/IERC1155MetadataURIUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/ContextUpgradeable.sol";
import "../../utils/introspection/ERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the basic standard multi-token.
 * See https://eips.ethereum.org/EIPS/eip-1155
 * Originally based on code by Enjin: https://github.com/enjin/erc-1155
 *
 * _Available since v3.1._
 */
contract ERC1155Upgradeable is Initializable, ContextUpgradeable, ERC165Upgradeable, IERC1155Upgradeable, IERC1155MetadataURIUpgradeable {
    using AddressUpgradeable for address;

    // Mapping from token ID to account balances
    mapping(uint256 => mapping(address => uint256)) private _balances;

    // Mapping from account to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    // Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
    string private _uri;

    /**
     * @dev See {_setURI}.
     */
    function __ERC1155_init(string memory uri_) internal onlyInitializing {
        __ERC1155_init_unchained(uri_);
    }

    function __ERC1155_init_unchained(string memory uri_) internal onlyInitializing {
        _setURI(uri_);
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165Upgradeable, IERC165Upgradeable) returns (bool) {
        return
            interfaceId == type(IERC1155Upgradeable).interfaceId ||
            interfaceId == type(IERC1155MetadataURIUpgradeable).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC1155MetadataURI-uri}.
     *
     * This implementation returns the same URI for *all* token types. It relies
     * on the token type ID substitution mechanism
     * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
     *
     * Clients calling this function must replace the `\{id\}` substring with the
     * actual token type ID.
     */
    function uri(uint256) public view virtual override returns (string memory) {
        return _uri;
    }

    /**
     * @dev See {IERC1155-balanceOf}.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
        require(account != address(0), "ERC1155: address zero is not a valid owner");
        return _balances[id][account];
    }

    /**
     * @dev See {IERC1155-balanceOfBatch}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
        public
        view
        virtual
        override
        returns (uint256[] memory)
    {
        require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");

        uint256[] memory batchBalances = new uint256[](accounts.length);

        for (uint256 i = 0; i < accounts.length; ++i) {
            batchBalances[i] = balanceOf(accounts[i], ids[i]);
        }

        return batchBalances;
    }

    /**
     * @dev See {IERC1155-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC1155-isApprovedForAll}.
     */
    function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[account][operator];
    }

    /**
     * @dev See {IERC1155-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) public virtual override {
        require(
            from == _msgSender() || isApprovedForAll(from, _msgSender()),
            "ERC1155: caller is not token owner or approved"
        );
        _safeTransferFrom(from, to, id, amount, data);
    }

    /**
     * @dev See {IERC1155-safeBatchTransferFrom}.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) public virtual override {
        require(
            from == _msgSender() || isApprovedForAll(from, _msgSender()),
            "ERC1155: caller is not token owner or approved"
        );
        _safeBatchTransferFrom(from, to, ids, amounts, data);
    }

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function _safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "ERC1155: transfer to the zero address");

        address operator = _msgSender();
        uint256[] memory ids = _asSingletonArray(id);
        uint256[] memory amounts = _asSingletonArray(amount);

        _beforeTokenTransfer(operator, from, to, ids, amounts, data);

        uint256 fromBalance = _balances[id][from];
        require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
        unchecked {
            _balances[id][from] = fromBalance - amount;
        }
        _balances[id][to] += amount;

        emit TransferSingle(operator, from, to, id, amount);

        _afterTokenTransfer(operator, from, to, ids, amounts, data);

        _doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
    }

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function _safeBatchTransferFrom(
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
        require(to != address(0), "ERC1155: transfer to the zero address");

        address operator = _msgSender();

        _beforeTokenTransfer(operator, from, to, ids, amounts, data);

        for (uint256 i = 0; i < ids.length; ++i) {
            uint256 id = ids[i];
            uint256 amount = amounts[i];

            uint256 fromBalance = _balances[id][from];
            require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
            unchecked {
                _balances[id][from] = fromBalance - amount;
            }
            _balances[id][to] += amount;
        }

        emit TransferBatch(operator, from, to, ids, amounts);

        _afterTokenTransfer(operator, from, to, ids, amounts, data);

        _doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
    }

    /**
     * @dev Sets a new URI for all token types, by relying on the token type ID
     * substitution mechanism
     * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
     *
     * By this mechanism, any occurrence of the `\{id\}` substring in either the
     * URI or any of the amounts in the JSON file at said URI will be replaced by
     * clients with the token type ID.
     *
     * For example, the `https://token-cdn-domain/\{id\}.json` URI would be
     * interpreted by clients as
     * `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
     * for token type ID 0x4cce0.
     *
     * See {uri}.
     *
     * Because these URIs cannot be meaningfully represented by the {URI} event,
     * this function emits no events.
     */
    function _setURI(string memory newuri) internal virtual {
        _uri = newuri;
    }

    /**
     * @dev Creates `amount` tokens of token type `id`, and assigns them to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function _mint(
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "ERC1155: mint to the zero address");

        address operator = _msgSender();
        uint256[] memory ids = _asSingletonArray(id);
        uint256[] memory amounts = _asSingletonArray(amount);

        _beforeTokenTransfer(operator, address(0), to, ids, amounts, data);

        _balances[id][to] += amount;
        emit TransferSingle(operator, address(0), to, id, amount);

        _afterTokenTransfer(operator, address(0), to, ids, amounts, data);

        _doSafeTransferAcceptanceCheck(operator, address(0), to, id, amount, data);
    }

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function _mintBatch(
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "ERC1155: mint to the zero address");
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");

        address operator = _msgSender();

        _beforeTokenTransfer(operator, address(0), to, ids, amounts, data);

        for (uint256 i = 0; i < ids.length; i++) {
            _balances[ids[i]][to] += amounts[i];
        }

        emit TransferBatch(operator, address(0), to, ids, amounts);

        _afterTokenTransfer(operator, address(0), to, ids, amounts, data);

        _doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
    }

    /**
     * @dev Destroys `amount` tokens of token type `id` from `from`
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `from` must have at least `amount` tokens of token type `id`.
     */
    function _burn(
        address from,
        uint256 id,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC1155: burn from the zero address");

        address operator = _msgSender();
        uint256[] memory ids = _asSingletonArray(id);
        uint256[] memory amounts = _asSingletonArray(amount);

        _beforeTokenTransfer(operator, from, address(0), ids, amounts, "");

        uint256 fromBalance = _balances[id][from];
        require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
        unchecked {
            _balances[id][from] = fromBalance - amount;
        }

        emit TransferSingle(operator, from, address(0), id, amount);

        _afterTokenTransfer(operator, from, address(0), ids, amounts, "");
    }

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     */
    function _burnBatch(
        address from,
        uint256[] memory ids,
        uint256[] memory amounts
    ) internal virtual {
        require(from != address(0), "ERC1155: burn from the zero address");
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");

        address operator = _msgSender();

        _beforeTokenTransfer(operator, from, address(0), ids, amounts, "");

        for (uint256 i = 0; i < ids.length; i++) {
            uint256 id = ids[i];
            uint256 amount = amounts[i];

            uint256 fromBalance = _balances[id][from];
            require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
            unchecked {
                _balances[id][from] = fromBalance - amount;
            }
        }

        emit TransferBatch(operator, from, address(0), ids, amounts);

        _afterTokenTransfer(operator, from, address(0), ids, amounts, "");
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits an {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC1155: setting approval status for self");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning, as well as batched variants.
     *
     * The same hook is called on both single and batched variants. For single
     * transfers, the length of the `ids` and `amounts` arrays will be 1.
     *
     * Calling conditions (for each `id` and `amount` pair):
     *
     * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * of token type `id` will be  transferred to `to`.
     * - When `from` is zero, `amount` tokens of token type `id` will be minted
     * for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
     * will be burned.
     * - `from` and `to` are never both zero.
     * - `ids` and `amounts` have the same, non-zero length.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {}

    /**
     * @dev Hook that is called after any token transfer. This includes minting
     * and burning, as well as batched variants.
     *
     * The same hook is called on both single and batched variants. For single
     * transfers, the length of the `id` and `amount` arrays will be 1.
     *
     * Calling conditions (for each `id` and `amount` pair):
     *
     * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * of token type `id` will be  transferred to `to`.
     * - When `from` is zero, `amount` tokens of token type `id` will be minted
     * for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
     * will be burned.
     * - `from` and `to` are never both zero.
     * - `ids` and `amounts` have the same, non-zero length.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {}

    function _doSafeTransferAcceptanceCheck(
        address operator,
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) private {
        if (to.isContract()) {
            try IERC1155ReceiverUpgradeable(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
                if (response != IERC1155ReceiverUpgradeable.onERC1155Received.selector) {
                    revert("ERC1155: ERC1155Receiver rejected tokens");
                }
            } catch Error(string memory reason) {
                revert(reason);
            } catch {
                revert("ERC1155: transfer to non-ERC1155Receiver implementer");
            }
        }
    }

    function _doSafeBatchTransferAcceptanceCheck(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) private {
        if (to.isContract()) {
            try IERC1155ReceiverUpgradeable(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (
                bytes4 response
            ) {
                if (response != IERC1155ReceiverUpgradeable.onERC1155BatchReceived.selector) {
                    revert("ERC1155: ERC1155Receiver rejected tokens");
                }
            } catch Error(string memory reason) {
                revert(reason);
            } catch {
                revert("ERC1155: transfer to non-ERC1155Receiver implementer");
            }
        }
    }

    function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
        uint256[] memory array = new uint256[](1);
        array[0] = element;

        return array;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[47] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import { OwnableUpgradeable } from "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import { UUPSUpgradeable } from "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import { ERC1155Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC1155/ERC1155Upgradeable.sol";
import { IERC165Upgradeable } from "@openzeppelin/contracts-upgradeable/utils/introspection/IERC165Upgradeable.sol";
import { SafeERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { Math } from "@openzeppelin/contracts/utils/math/Math.sol";

import {
    IConditionalTokens,
    IConditionalTokensV1_2,
    IConditionalTokensEventsV1_2,
    ILegConditionalTokens
} from "./IConditionalTokensV1_2.sol";
import { ConditionID, QuestionID, CollectionID, CTHelpers } from "./CTHelpers.sol";
import { ArrayMath } from "../Math.sol";
import { PackedPrices } from "../PackedPrices.sol";

contract ConditionalTokensStorage {
    struct PriceStorage {
        /// @dev saving the condition oracle so it's cheaper to get the oracle
        /// than recompute it using keccak every time from questionId
        address conditionOracle; // offset 0, length 20 bytes
        uint32 haltTime; //     offset 20, length  4 bytes
        // 8 bytes of padding available
        bytes packedPrices; //  offset 32
    }

    /// @dev payoutNumerators and payoutDenominator represent the payout vector associated a condition. PayoutNumberator
    /// is initialized with a length equal to the outcomeSlotCount when the condition is prepared.
    ///
    /// E.g:
    /// condition with 3 outcomes [A, B, C], two of those are correct: A & B
    /// payout vector = [0.5, 0.5, 0]
    /// This is represented as:
    /// payoutNumerators = [1,1,0] & payoutDenominator = 2
    ///
    /// PayoutNumerators are also used as a check of initialization. If the numerators array is empty (has length zero),
    /// the condition was not created/prepared.
    ///
    /// PayoutDenominator is also used for checking if the condition has been resolved. If the denominator is non-zero,
    /// then the condition has been resolved.
    mapping(ConditionID => uint256[]) public payoutNumerators;
    mapping(ConditionID => uint256) public payoutDenominator;
    mapping(address => bool) public erc20Whitelist;
    mapping(ConditionID => PriceStorage) public priceStorage;

    // NOTE: for fee refunds.
    // Potential fee solution - store `mapping(UserPositionID => UserPositionInfo)`, that has fee data.
    // When doing a push, can refund the fees stored in UserPositionInfo, otherwise just ignore
    // Will also need `mapping(TokenConditionID => uint256)` to store total fees gathered for condition + token

    uint256[48] private __gap;
}

// TODO: move into own file
/// @dev Basic conditional tokens functionality
abstract contract ConditionalTokensBase is
    UUPSUpgradeable,
    IConditionalTokens,
    ERC1155Upgradeable,
    OwnableUpgradeable,
    ConditionalTokensStorage
{
    using SafeERC20 for IERC20;
    using ArrayMath for uint256[];

    /// @dev 3 outcomes, because last one is a refund
    uint256 internal constant PARLAY_OUTCOME_SLOT_COUNT = 3;

    // solhint-disable-next-line func-name-mixedcase
    function __ConditionalTokensBase_init() internal onlyInitializing {
        __ERC1155_init("");
        __Ownable_init();
        __UUPSUpgradeable_init();

        __ConditionalTokensBase_init_unchained();
    }

    // solhint-disable-next-line func-name-mixedcase no-empty-blocks
    function __ConditionalTokensBase_init_unchained() internal onlyInitializing { }

    function setERC20Whitelist(IERC20 token, bool approved) external onlyOwner {
        erc20Whitelist[address(token)] = approved;
    }

    /// @notice This function creates a new condition. If the condition is already created, this function is idempotent.
    /// @dev The condition is stored by initializing the payoutNumerator for that particular condition.
    /// Has to be idempotent. Initial prices are all 0, and the condition is unhalted
    /// @param conditionOracle The account assigned to report the result for the
    /// prepared condition, as well as adjust prices and halt time.
    /// @param questionId An identifier for the question to be answered by the oracle.
    /// @param outcomeSlotCount The number of outcome slots for this condition. Must not exceed 256.
    /// @return The ConditionID for this condition
    function prepareCondition(address conditionOracle, QuestionID questionId, uint256 outcomeSlotCount)
        public
        returns (ConditionID)
    {
        // Limit of 256 because we use a partition array that is a number of 256 bits.
        if (outcomeSlotCount < 2 || outcomeSlotCount > 255) revert InvalidOutcomeSlotsAmount();

        ConditionID conditionId = CTHelpers.getConditionId(conditionOracle, questionId, outcomeSlotCount);

        // If not prepared, initialize, and emit the event, otherwise just return existing conditionId
        if (payoutNumerators[conditionId].length == 0) {
            payoutNumerators[conditionId] = new uint256[](outcomeSlotCount);
            priceStorage[conditionId].conditionOracle = conditionOracle;
            // Start condition as unhalted. Otherwise not possible to change halt time
            priceStorage[conditionId].haltTime = type(uint32).max;

            emit ConditionPreparation(conditionId, conditionOracle, questionId, outcomeSlotCount);
        }

        return conditionId;
    }

    // TODO: docs
    function _reportPayouts(address oracle, QuestionID questionId, uint256[] memory numerators, uint256 denominator)
        internal
    {
        uint256 outcomeSlotCount = numerators.length;
        if (outcomeSlotCount <= 1 || outcomeSlotCount > 255) revert InvalidOutcomeSlotsAmount();

        ConditionID conditionId = CTHelpers.getConditionId(oracle, questionId, outcomeSlotCount);
        if (payoutNumerators[conditionId].length != outcomeSlotCount) revert ConditionNotFound();
        if (isResolved(conditionId)) revert PayoutAlreadyReported();
        if (denominator == 0) revert PayoutsAreAllZero();

        payoutNumerators[conditionId] = numerators;
        payoutDenominator[conditionId] = denominator;

        emit ConditionResolution(conditionId, oracle, questionId, outcomeSlotCount, numerators);
    }

    function isResolved(ConditionID conditionId) public view returns (bool) {
        return payoutDenominator[conditionId] != 0;
    }

    /// @notice Deposits an amount of collateral (ERC20) into this contract and mints to the sender the same amount of
    /// conditional tokens (ERC1155) for each of the outcomes in the specified condition ID.
    /// @dev When splitting from the collateral, the function will attempt to transfer `amount` collateral from the
    /// message sender to itself.  Regardless, if successful, `amount` stake will be minted in the split target
    /// positions. If any of the transfers, mints, or burns fail, the transaction will revert. The transaction will also
    /// revert if the given partition is trivial, invalid, or refers to more slots than the condition is prepared with.
    /// @param collateralToken The address of the positions' backing collateral token.
    /// @param conditionId The ID of the condition to split on.
    /// @param amount The amount of collateral or stake to split.
    function splitPosition(IERC20 collateralToken, ConditionID conditionId, uint256 amount) external {
        if (amount == 0) revert InvalidAmount();

        // - Only validate erc20 whitelist here, as it's the only way to create conditional tokens.
        //   All other operations are only possible after splitting.
        // - In the case where a token that was already whitelisted becomes
        //   blacklisted, we only prevent any further creation of conditional
        //   tokens, but allow existing positions to wind down to prevent trapping
        //   the collateral inside the ConditionalTokens contract
        if (!erc20Whitelist[address(collateralToken)]) revert InvalidERC20();

        uint256 outcomeSlotCount = payoutNumerators[conditionId].length;
        if (outcomeSlotCount == 0) revert ConditionNotFound();

        uint256[] memory positionIds = new uint256[](outcomeSlotCount);
        uint256[] memory amounts = new uint256[](outcomeSlotCount);
        for (uint256 i = 0; i < outcomeSlotCount; i++) {
            positionIds[i] = CTHelpers.getPositionId(collateralToken, CTHelpers.getCollectionId(conditionId, i));
            amounts[i] = amount;
        }

        collateralToken.safeTransferFrom(_msgSender(), address(this), amount);

        _mintBatch(
            _msgSender(),
            // position ID is the ERC 1155 token ID
            positionIds,
            amounts,
            ""
        );
        emit PositionSplit(_msgSender(), collateralToken, conditionId, amount);
    }

    /// @notice Burns the specified amount of conditional tokens (ERC1155) for all the positions and returns to the
    /// sender that amount of collateral (ERC20).
    /// @param collateralToken The address of the positions' backing collateral token.
    /// @param conditionId The ID of the condition to split on.
    /// @param amount The quantity of conditional tokens to merge.
    function mergePositions(IERC20 collateralToken, ConditionID conditionId, uint256 amount) external {
        if (amount == 0) revert InvalidAmount();

        uint256 outcomeSlotCount = payoutNumerators[conditionId].length;
        if (outcomeSlotCount == 0) revert ConditionNotFound();

        uint256[] memory positionIds = new uint256[](outcomeSlotCount);
        uint256[] memory amounts = new uint256[](outcomeSlotCount);
        for (uint256 i = 0; i < outcomeSlotCount; i++) {
            positionIds[i] = CTHelpers.getPositionId(collateralToken, CTHelpers.getCollectionId(conditionId, i));
            amounts[i] = amount;
        }
        _burnBatch(_msgSender(), positionIds, amounts);

        collateralToken.safeTransfer(_msgSender(), amount);

        emit PositionsMerge(_msgSender(), collateralToken, conditionId, amount);
    }

    /// @notice Redeems the collateral corresponding to a particular outcome of a condition
    /// @param owner The owner account of the conditional tokens
    /// @param conditionId The ID of the condition
    /// @param index Outcome index to redeem
    /// @param burnAmount Amount of conditional tokens to burn
    /// @return totalPayout The amount of collateral that should be transferred back
    function _redeemPosition(
        address owner,
        uint256 positionId,
        ConditionID conditionId,
        uint256 index,
        uint256 burnAmount
    ) internal returns (uint256 totalPayout) {
        uint256 denominator = payoutDenominator[conditionId];
        if (denominator == 0) revert ResultNotReceivedYet();

        uint256 outcomeSlotCount = payoutNumerators[conditionId].length;
        assert(outcomeSlotCount != 0);

        if (index >= outcomeSlotCount) revert InvalidIndex();

        uint256 payoutNumerator = payoutNumerators[conditionId][index];

        if (burnAmount > 0) {
            totalPayout = (burnAmount * payoutNumerator) / denominator;
            _burn(owner, positionId, burnAmount);
        }
    }

    /// @notice Redeem conditional tokens into collateral based on their
    /// reported payout value. Redeems the sender's tokens and gives the
    /// proceeds to receiver.
    /// @param receiver The address that will receive all the proceeds of the redemption.
    /// @param collateralToken The address of the positions' backing collateral token.
    /// @param conditionId The ID of the condition to split on.
    /// @param indices Outcome indices to redeem.
    /// @param quantities Quantity of conditional tokens for each index to be burned.
    function redeemPositionsFor(
        address receiver,
        IERC20 collateralToken,
        ConditionID conditionId,
        uint256[] calldata indices,
        uint256[] calldata quantities
    ) public returns (uint256 totalPayout) {
        if (indices.length != quantities.length) revert InvalidQuantities();

        totalPayout = 0;
        for (uint256 i = 0; i < indices.length; i++) {
            uint256 positionId =
                CTHelpers.getPositionId(collateralToken, CTHelpers.getCollectionId(conditionId, indices[i]));
            totalPayout += _redeemPosition(_msgSender(), positionId, conditionId, indices[i], quantities[i]);
        }
        // Doing the emit here before the transfer to mirror the ordering done in redeemAll.
        // There, all the PayoutRedemption emits are done one-by-one, follow by one large safeTransfer.
        emit PayoutRedemption(receiver, collateralToken, conditionId, indices, totalPayout);

        if (totalPayout > 0) {
            collateralToken.safeTransfer(receiver, totalPayout);
        }
    }

    /// @notice Redeem multiple conditions and outcomes in one call for the sender
    /// @param collateralToken The address of the collateral token used to enter the positions
    /// @param conditionIds an array of ConditionIDs to redeem
    /// @param indices an array of outcome indices to redeem from the corresponding entry in the conditionIds array
    function redeemAll(IERC20 collateralToken, ConditionID[] calldata conditionIds, uint256[] calldata indices)
        external
    {
        redeemAllOf(_msgSender(), collateralToken, conditionIds, indices);
    }

    /// @notice Redeem multiple conditions and outcomes in one call on behalf of an owner
    /// @param ownerAndReceiver The account of the owner of conditional tokens
    /// @param collateralToken The address of the collateral token used to enter the positions
    /// @param conditionIds an array of ConditionIDs to redeem
    /// @param indices an array of outcome indices to redeem from the corresponding entry in the conditionIds array
    function redeemAllOf(
        address ownerAndReceiver,
        IERC20 collateralToken,
        ConditionID[] calldata conditionIds,
        uint256[] calldata indices
    ) public returns (uint256 totalPayout) {
        if (conditionIds.length != indices.length) revert InvalidIndex();

        uint256 totalBurnt = 0;
        uint256[] memory eventIndices = new uint256[](1);
        for (uint256 i = 0; i < conditionIds.length; i++) {
            ConditionID conditionId = conditionIds[i];
            uint256 index = indices[i];
            uint256 positionId = CTHelpers.getPositionId(collateralToken, CTHelpers.getCollectionId(conditionId, index));
            uint256 burnAmount = balanceOf(ownerAndReceiver, positionId);
            totalBurnt += burnAmount;

            uint256 payout = _redeemPosition(ownerAndReceiver, positionId, conditionId, index, burnAmount);
            totalPayout += payout;

            eventIndices[0] = index;
            emit PayoutRedemption(ownerAndReceiver, collateralToken, conditionId, eventIndices, payout);
        }

        if (totalBurnt == 0) {
            revert NoPositionsToRedeem();
        }

        if (totalPayout > 0) {
            collateralToken.safeTransfer(ownerAndReceiver, totalPayout);
        }
    }

    /// @notice Returns the balance array of conditional tokens (ERC1155) of an account for a particular condition ID.
    /// @param account account address to query for balances.
    /// @param collateralToken collateral token associated with the position ID.
    /// @param conditionId condition ID to query for.
    function balanceOfCondition(address account, IERC20 collateralToken, ConditionID conditionId)
        public
        view
        returns (uint256[] memory)
    {
        uint256 outcomeSlotCount = payoutNumerators[conditionId].length;
        if (outcomeSlotCount == 0) revert ConditionNotFound();

        uint256[] memory batchBalances = new uint256[](outcomeSlotCount);

        for (uint256 i = 0; i < outcomeSlotCount; ++i) {
            uint256 positionId = CTHelpers.getPositionId(collateralToken, CTHelpers.getCollectionId(conditionId, i));
            batchBalances[i] = balanceOf(account, positionId);
        }

        return batchBalances;
    }

    /// @dev Gets the number of outcome slots for a condition ID.
    /// @param conditionId ID of the condition.
    /// @return outcomeSlotCount Number of outcome slots associated with a condition, or zero if condition has not been
    /// prepared yet.
    function getOutcomeSlotCount(ConditionID conditionId) public view returns (uint256 outcomeSlotCount) {
        outcomeSlotCount = payoutNumerators[conditionId].length;
    }

    /// @dev Constructs a condition ID from an oracle, a question ID, and the outcome slot count for the question.
    /// @param oracle The account assigned to report the result for the prepared condition.
    /// @param questionId An identifier for the question to be answered by the oracle.
    /// @param outcomeSlotCount The number of outcome slots for this condition. Must not exceed 256.
    function getConditionId(address oracle, QuestionID questionId, uint256 outcomeSlotCount)
        external
        pure
        returns (ConditionID)
    {
        return CTHelpers.getConditionId(oracle, questionId, outcomeSlotCount);
    }

    /// @dev Constructs an outcome collection ID
    /// @param conditionId Condition ID of the outcome collection
    /// @param index outcome index
    function getCollectionId(ConditionID conditionId, uint256 index) public pure returns (CollectionID) {
        return CTHelpers.getCollectionId(conditionId, index);
    }

    /// @dev Constructs a position ID from a collateral token and an outcome collection. These IDs are used as the
    /// ERC-1155 ID for this contract.
    /// @param collateralToken Collateral token which backs the position.
    /// @param collectionId ID of the outcome collection associated with this position.
    function getPositionId(IERC20 collateralToken, CollectionID collectionId) external pure returns (uint256) {
        return CTHelpers.getPositionId(collateralToken, collectionId);
    }

    /// @dev Constructs list of positionIds for a condition. These IDs are used as the ERC-1155 ID for this contract.
    /// @param collateralToken Collateral token which backs the position.
    /// @param conditionId ID of the condition
    function getPositionIds(IERC20 collateralToken, ConditionID conditionId) external view returns (uint256[] memory) {
        uint256 outcomeSlotCount = getOutcomeSlotCount(conditionId);
        uint256[] memory positionIds = new uint256[](outcomeSlotCount);
        for (uint256 i = 0; i < outcomeSlotCount; i++) {
            positionIds[i] = CTHelpers.getPositionId(collateralToken, getCollectionId(conditionId, i));
        }
        return positionIds;
    }
}

/// @dev Tokens that represent different outcomes of a condition.
/// Note ConditionalTokensStorage is last, so it's possible to upgrade if we
/// decide to inherit more contracts. They just have to come after the
/// ConditionalTokenStorage, in order for the upgrade to be compatible
contract ConditionalTokens is ConditionalTokensBase, IConditionalTokensV1_2, ILegConditionalTokens {
    using Math for uint256;

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() {
        _disableInitializers();
    }

    // solhint-disable-next-line no-empty-blocks
    function _authorizeUpgrade(address) internal override onlyOwner { }

    // solhint-disable-next-line ordering
    function initialize() public initializer {
        __ConditionalTokensBase_init();
    }

    /// @notice This function creates a new condition. If the condition is already created, this function is idempotent.
    /// @dev Has to be called by the intended condition oracle, which allows this to also set the price and halt time
    /// @param questionId An identifier for the question to be answered by the oracle.
    /// @param outcomeSlotCount The number of outcome slots for this condition. Must not exceed 256.
    /// @param packedPrices The initial fair prices for the condition in a PackedPrice encoding
    /// @param haltTime_ The initial halt time for the condition
    /// @return conditionId The ConditionID for this condition
    function prepareConditionByOracle(
        QuestionID questionId,
        uint256 outcomeSlotCount,
        bytes calldata packedPrices,
        uint32 haltTime_
    ) external returns (ConditionID conditionId) {
        address conditionOracle = _msgSender();
        conditionId = prepareCondition(conditionOracle, questionId, outcomeSlotCount);

        ConditionalTokensStorage.PriceStorage storage priceStorage_ = priceStorage[conditionId];
        // If prices/halt time first initialized by oracle, update
        if (priceStorage_.packedPrices.length == 0) {
            priceStorage[conditionId].haltTime = haltTime_;
            priceStorage[conditionId].packedPrices = packedPrices;

            emit HaltTimeUpdated(conditionId, haltTime_);
            emit ConditionPricesUpdated(conditionId, packedPrices);
        }
    }

    /// @notice Function used to report the result of a condition by the oracle
    /// @dev Called by the oracle for reporting results of conditions. It sets the payout vector for a particular
    /// question ID.  The oracle must be the message sender for this transaction to succeed The payouts array should
    /// have an equal length to outcomeSlotCount previously set when the condition was stored.
    ///
    /// E.g:
    /// 2 outcomes = [0,1]   -> result: index 1
    /// 3 outcomes = [1,0,0] -> result: index 0
    /// 3 outcomes = [1,0,1] -> result: index 0 & 2
    /// The values are not neccessary limited to 0 & 1.
    /// @param questionId The question ID the oracle is answering for.
    /// @param payouts results array provided by the oracle.
    function reportPayouts(QuestionID questionId, uint256[] calldata payouts) public {
        uint256 outcomeSlotCount = payouts.length;
        uint256[] memory numerators = new uint256[](outcomeSlotCount);
        uint256 den = 0;
        for (uint256 i = 0; i < outcomeSlotCount; i++) {
            uint256 num = payouts[i];
            den = den + num;
            numerators[i] = num;
        }

        _reportPayouts(_msgSender(), questionId, numerators, den);
    }

    /**
     * @notice Report payout in batches for the conditions for the given
     * `questionIDs` and their associated outcomes. The `payouts` array should
     * contain the payout values for each outcome of each question. The
     * `outcomeSlotCounts` array should have the number of outcomes for each
     * question ID. Both arrays should be correctly ordered, with the payouts
     * for each question's outcomes immediately following its corresponding
     * question ID. For example:
     *
     *   questionIDs = [question0 (2 outcomes), question1 (3 outcomes), question2 (2 outcomes)]
     *   payouts = [
     *     pay_0_0, pay_0_1,   // payouts for question0, outcome0 and outcome1
     *     pay_1_0, pay_1_1, pay_1_2,  // payouts for question1, outcome0, outcome1, and outcome2
     *     pay_2_0, pay_2_1  // payouts for question2, outcome0 and outcome1
     *   ]
     *   outcomeSlotCounts = [
     *     2,
     *     3,
     *     2,
     *   ]
     *
     * @param questionIDs An array of QuestionIDs corresponding to the conditions to be resolved.
     * @param payouts An array of payout values for each outcome of each question.
     * @param outcomeSlotCounts An array containing the number of outcomes for each question ID.
     *
     */
    function batchReportPayouts(
        QuestionID[] calldata questionIDs,
        uint256[] calldata payouts,
        uint256[] calldata outcomeSlotCounts
    ) external {
        if (questionIDs.length != outcomeSlotCounts.length) revert InvalidOutcomeSlotCountsArray();
        if (payouts.length < questionIDs.length) revert InvalidPayoutArray();

        uint256 offset = 0;
        for (uint256 i = 0; i < questionIDs.length; i++) {
            uint256 outcomeSlotCount = outcomeSlotCounts[i];
            reportPayouts(questionIDs[i], payouts[offset:offset + outcomeSlotCount]);
            offset += outcomeSlotCount;
        }
    }

    /// @inheritdoc	IConditionalTokensV1_2
    function updateFairPrices(ConditionID conditionId, bytes calldata packedPrices) public {
        ConditionalTokensStorage.PriceStorage storage priceStorage_ = priceStorage[conditionId];
        // Load both at the same time onto stack to save on `sload` instructions
        address conditionOracle = priceStorage_.conditionOracle;
        uint256 haltTime_ = priceStorage_.haltTime;

        if (_msgSender() != conditionOracle) revert MustBeCalledByOracle();

        // When updating the price, it's important to check if the haltTime has
        // been reached - traders can no longer place trades after that, so it
        // is unfair to change price at that point.
        //
        // However isHalted() also includes a check whether the condition has
        // been resolved. This check is redundant because updating a price after
        // the condition has already been resolved has no effect - the payouts
        // have already been determined.
        //
        // To optimize gas usage, we actually don't need to check if the
        // condition is resolved or not, only the halt time.
        //
        // Finally, because of race conditions between halt time and when the
        // price oracle submits the last price updates, this may trigger. If
        // this was a revert, then an entire batch would be reverted. It is
        // simpler to just ignore the price update.
        if (block.timestamp >= haltTime_) return;

        uint256 oldLength = priceStorage_.packedPrices.length;
        if (!(oldLength == 0 || packedPrices.length == oldLength)) revert InvalidPrices();

        uint256 total = PackedPrices.sum(packedPrices);
        if (total != PackedPrices.DIVISOR) revert InvalidPrices();
        priceStorage_.packedPrices = packedPrices;
    }

    /// @inheritdoc	IConditionalTokensV1_2
    function batchUpdateFairPrices(PriceUpdate[] calldata priceUpdates) external {
        for (uint256 i = 0; i < priceUpdates.length; ++i) {
            updateFairPrices(priceUpdates[i].conditionId, priceUpdates[i].packedPrices);
        }
    }

    /// @inheritdoc	IConditionalTokensV1_2
    function getFairPrices(ConditionID conditionId) public view returns (uint256[] memory fairPriceDecimals) {
        fairPriceDecimals = PackedPrices.toPriceDecimals(priceStorage[conditionId].packedPrices);
    }

    /// @inheritdoc	IConditionalTokensV1_2
    function updateHaltTime(ConditionID conditionId, uint32 _haltTime) public {
        ConditionalTokensStorage.PriceStorage storage priceStorage_ = priceStorage[conditionId];
        address conditionOracle = priceStorage_.conditionOracle;
        uint256 oldHaltTime = priceStorage_.haltTime;
        if (_msgSender() != conditionOracle) revert MustBeCalledByOracle();

        if (block.timestamp > oldHaltTime) revert InvalidHaltTime();
        priceStorage[conditionId].haltTime = _haltTime;
        emit HaltTimeUpdated(conditionId, _haltTime);
    }

    /// @inheritdoc	IConditionalTokensV1_2
    function batchUpdateHaltTimes(HaltUpdate[] calldata haltUpdates) external {
        for (uint256 i = 0; i < haltUpdates.length; ++i) {
            HaltUpdate calldata haltUpdate = haltUpdates[i];
            updateHaltTime(haltUpdate.conditionId, haltUpdate.haltTime);
        }
    }

    /// @inheritdoc	IConditionalTokensV1_2
    function haltTime(ConditionID conditionId) public view returns (uint32) {
        return priceStorage[conditionId].haltTime;
    }

    /// @inheritdoc	IConditionalTokensV1_2
    function isHalted(ConditionID conditionId) external view returns (bool) {
        return isResolved(conditionId) || block.timestamp >= haltTime(conditionId);
    }

    function getPositionInfo(address account, IERC20 collateralToken, ConditionID conditionId)
        external
        view
        returns (uint256[] memory balances, uint256[] memory fairPriceDecimals)
    {
        balances = balanceOfCondition(account, collateralToken, conditionId);
        fairPriceDecimals = getFairPrices(conditionId);
    }

    function getPayouts(ConditionID conditionId)
        external
        view
        returns (uint256[] memory numerators, uint256 denominator)
    {
        numerators = payoutNumerators[conditionId];
        denominator = payoutDenominator[conditionId];
    }

    function getParlayFairPrices(ConditionID[] calldata conditionIds, uint256[] calldata indices)
        external
        view
        returns (uint256[] memory fairPriceDecimals)
    {
        if (conditionIds.length != indices.length) revert InvalidIndex();

        uint256 mainNumerator = 1;
        uint256 denominator = 1;
        for (uint256 i = 0; i < conditionIds.length; i++) {
            ConditionID conditionId = conditionIds[i];
            uint256 index = indices[i];

            bytes memory packedPrices = priceStorage[conditionId].packedPrices;
            mainNumerator *= PackedPrices.valueAtIndex(packedPrices, index);
            denominator *= PackedPrices.DIVISOR;
        }
        // If numerator ends up 0, then one of the prices was 0, which means the
        // outcome index passed in was for a non-priced outcome (such as a
        // refund)
        if (mainNumerator == 0) revert InvalidIndex();

        uint256 mainPriceDecimal = mainNumerator.mulDiv(PackedPrices.ONE_DECIMAL, denominator, Math.Rounding.Up);
        fairPriceDecimals = new uint256[](2);
        fairPriceDecimals[0] = mainPriceDecimal;
        fairPriceDecimals[1] = PackedPrices.ONE_DECIMAL - mainPriceDecimal;
    }

    function getParlayPayouts(ConditionID[] calldata conditionIds, uint256[] calldata indices)
        external
        view
        returns (uint256[] memory numerators, uint256 denominator)
    {
        // TODO: consider the refund case
        uint256 mainNumerator = 1;
        denominator = 1;
        for (uint256 i = 0; i < conditionIds.length; i++) {
            ConditionID conditionId = conditionIds[i];

            uint256 legDenominator = payoutDenominator[conditionId];
            assert(legDenominator <= PackedPrices.DIVISOR); // this should be guaranteed elsewhere
            denominator *= legDenominator;

            uint256 index = indices[i];
            mainNumerator *= payoutNumerators[conditionId][index];

            // Short circuit if any condition is already lost. Even if other
            // conditions are not yet resolved, we can settle the parlay as lost
            // if any one of the positions is lost
            if (mainNumerator == 0 && legDenominator > 0) {
                denominator = 1;
                break;
            }
        }
        // if any denominator is zero, then the final denominator is 0,
        // indicating at least one condition hasn't yet settled
        if (denominator == 0) revert ResultNotReceivedYet();

        numerators = new uint256[](PARLAY_OUTCOME_SLOT_COUNT);
        numerators[0] = mainNumerator;
        numerators[1] = denominator - mainNumerator;
    }

    function supportsInterface(bytes4 interfaceId)
        public
        view
        virtual
        override(IERC165Upgradeable, ERC1155Upgradeable)
        returns (bool)
    {
        return interfaceId == type(IConditionalTokens).interfaceId
            || interfaceId == type(IConditionalTokensV1_2).interfaceId
            || interfaceId == type(ILegConditionalTokens).interfaceId || ERC1155Upgradeable.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import { ConditionID, QuestionID } from "./CTHelpers.sol";

struct ParlayLegs {
    /// @dev list of unique questionIds to be used as legs in the parlay
    QuestionID[] questionIds;
    /// @dev the outcome index in each leg of the parlay
    uint256[] indices;
    /// @dev number of outcomes for each questionId. Needed to reconstruct the conditionIds
    uint256[] outcomeSlotCounts;
}

interface IParlayConditionalTokensEvents {
    event ParlayConditionLegs(
        ConditionID indexed conditionId,
        QuestionID indexed questionId,
        address indexed legOracle,
        uint256 legQuestionIdMask,
        ParlayLegs legs
    );
}

interface IParlayConditionalTokens {
    /// @dev Prepare a condition that is a parlay of several other conditions as legs of the parlay.
    /// @param legOracle the condition oracle providing resolutions for all the conditions in the parlay
    /// @param legQuestionIdMask When considering uniqueness and ordering, this
    /// bitmask will be applied to the questionId. This can be used to restrict
    /// parlays to only be possible across different events.
    /// @param legs list of all legs
    /// @return parlayQuestionId the synthetic questionID of the parlay
    /// @return parlayConditionId the conditionId of the parlay
    function prepareParlayCondition(address legOracle, uint256 legQuestionIdMask, ParlayLegs calldata legs)
        external
        returns (QuestionID parlayQuestionId, ConditionID parlayConditionId);

    /// @dev report parlay payouts for a questionId in a permissionless manner.
    /// The payout is deterministically decided by the payouts of the legs of the parlay.
    /// If not all leg conditions are resolved, will revert.
    /// If parlay condition is already resolved, will do nothing (idempotent)
    /// @param parlayQuestionId the parlay id (returned when creating the parlay condition)
    function reportParlayPayouts(QuestionID parlayQuestionId) external;

    function batchReportParlayPayouts(QuestionID[] calldata parlayQuestionIds) external;

    /// @dev Calculates the derived Parlay QuestionID from underlying conditional token leg conditions
    /// @param legOracle the oracle address used for all the underlying legs
    /// @param legQuestionIds all the leg questionIds
    /// @param legQuestionIdMask When considering uniqueness and ordering, this
    /// bitmask will be applied to the questionId. This can be used to restrict
    /// parlays to only be possible across different events.
    /// @param legIndices the outcome index in each leg of the parlay
    /// @return parlayQuestionId the derived QuestionID for the parlay
    function getParlayQuestionId(
        address legOracle,
        QuestionID[] calldata legQuestionIds,
        uint256 legQuestionIdMask,
        uint256[] calldata legIndices
    ) external pure returns (QuestionID);

    function getParlayConditionId(QuestionID parlayQuestionId) external pure returns (ConditionID);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

interface ParlayConditionalTokensErrors {
    error InvalidParlayArraySizes();
    error ParlayInputsNotInCanonicalOrder();
    error TooManyConditionsInParlay();
    error InvalidQuestionIdMask();
    error InvalidConditionalTokensAddress(address conditionalTokens);

    error OperationNotSupportedWithoutLegInformation();
    error OperationNotSupportedForParlayConditions();
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

type QuestionID is bytes32;

type ConditionID is bytes32;

type CollectionID is bytes32;

library CTHelpers {
    /// @dev Constructs a condition ID from an oracle, a question ID, and the
    /// outcome slot count for the question.
    /// @param oracle The account assigned to report the result for the prepared condition.
    /// @param questionId An identifier for the question to be answered by the oracle.
    /// @param outcomeSlotCount The number of outcome slots which should be used
    /// for this condition. Must not exceed 256.
    function getConditionId(address oracle, QuestionID questionId, uint256 outcomeSlotCount)
        internal
        pure
        returns (ConditionID)
    {
        assert(outcomeSlotCount < 257); // `<` uses less gas than `<=`
        return ConditionID.wrap(keccak256(abi.encodePacked(oracle, questionId, outcomeSlotCount)));
    }

    /// @dev Constructs an outcome collection ID
    /// @param conditionId Condition ID of the outcome collection
    /// @param index outcome index
    function getCollectionId(ConditionID conditionId, uint256 index) internal pure returns (CollectionID) {
        return CollectionID.wrap(keccak256(abi.encodePacked(conditionId, index)));
    }

    /// @dev Constructs a position ID from a collateral token and an outcome
    /// collection. These IDs are used as the ERC-1155 ID for this contract.
    /// @param collateralToken Collateral token which backs the position.
    /// @param collectionId ID of the outcome collection associated with this position.
    function getPositionId(IERC20 collateralToken, CollectionID collectionId) internal pure returns (uint256) {
        return uint256(keccak256(abi.encodePacked(collateralToken, collectionId)));
    }

    /// @dev Constructs all position ID in a condition, for a collateral token.
    /// These IDs are used as the ERC-1155 ID for the ConditionalTokens contract.
    /// @param collateralToken Collateral token which backs the position.
    /// @param conditionId ID of the condition associated with all positions
    /// @param outcomeSlotCount number of outcomes in the condition
    function getPositionIds(IERC20 collateralToken, ConditionID conditionId, uint256 outcomeSlotCount)
        internal
        pure
        returns (uint256[] memory positionIds)
    {
        positionIds = new uint256[](outcomeSlotCount);
        for (uint256 i = 0; i < outcomeSlotCount; i++) {
            positionIds[i] = getPositionId(collateralToken, getCollectionId(conditionId, i));
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165Upgradeable.sol";

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155Upgradeable is IERC165Upgradeable {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
        external
        view
        returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165Upgradeable.sol";

/**
 * @dev _Available since v3.1._
 */
interface IERC1155ReceiverUpgradeable is IERC165Upgradeable {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/IERC1155MetadataURI.sol)

pragma solidity ^0.8.0;

import "../IERC1155Upgradeable.sol";

/**
 * @dev Interface of the optional ERC1155MetadataExtension interface, as defined
 * in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155MetadataURIUpgradeable is IERC1155Upgradeable {
    /**
     * @dev Returns the URI for token type `id`.
     *
     * If the `\{id\}` substring is present in the URI, it must be replaced by
     * clients with the actual token type ID.
     */
    function uri(uint256 id) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165Upgradeable.sol";
import "../../proxy/utils/Initializable.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable {
    function __ERC165_init() internal onlyInitializing {
    }

    function __ERC165_init_unchained() internal onlyInitializing {
    }
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165Upgradeable).interfaceId;
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Returns the highest version that has been initialized. See {reinitializer}.
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[49] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.0;

import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 *
 * _Available since v4.1._
 */
abstract contract UUPSUpgradeable is Initializable, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {
    function __UUPSUpgradeable_init() internal onlyInitializing {
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
    address private immutable __self = address(this);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        require(address(this) != __self, "Function must be called through delegatecall");
        require(_getImplementation() == __self, "Function must be called through active proxy");
        _;
    }

    /**
     * @dev Check that the execution is not being performed through a delegate call. This allows a function to be
     * callable on the implementing contract but not through proxies.
     */
    modifier notDelegated() {
        require(address(this) == __self, "UUPSUpgradeable: must not be called through delegatecall");
        _;
    }

    /**
     * @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
     * implementation. It is used to validate the implementation's compatibility when performing an upgrade.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
     */
    function proxiableUUID() external view virtual override notDelegated returns (bytes32) {
        return _IMPLEMENTATION_SLOT;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeTo(address newImplementation) external virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, new bytes(0), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallUUPS(newImplementation, data, true);
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeTo} and {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal override onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) {
            // Return data is optional
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10**64) {
                value /= 10**64;
                result += 64;
            }
            if (value >= 10**32) {
                value /= 10**32;
                result += 32;
            }
            if (value >= 10**16) {
                value /= 10**16;
                result += 16;
            }
            if (value >= 10**8) {
                value /= 10**8;
                result += 8;
            }
            if (value >= 10**4) {
                value /= 10**4;
                result += 4;
            }
            if (value >= 10**2) {
                value /= 10**2;
                result += 2;
            }
            if (value >= 10**1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import { IConditionalTokensEvents, IConditionalTokens, IERC20, ConditionalTokensErrors } from "./IConditionalTokens.sol";
import { PackedPrices } from "../PackedPrices.sol";
import { ConditionID, QuestionID, CTHelpers } from "./CTHelpers.sol";

interface IConditionalTokensEventsV1_2 is IConditionalTokensEvents {
    /// @dev Event emitted only when a condition is prepared to save on gas costs
    /// @param conditionId which condition had its price set
    /// @param packedPrices the encoded prices in a byte array
    event ConditionPricesUpdated(ConditionID indexed conditionId, bytes packedPrices);

    /// @dev Halt time for a condition has been updated
    event HaltTimeUpdated(ConditionID indexed conditionId, uint32 haltTime);
}

interface IConditionalTokensV1_2 is IConditionalTokens, IConditionalTokensEventsV1_2 {
    struct PriceUpdate {
        ConditionID conditionId;
        bytes packedPrices;
    }

    struct HaltUpdate {
        ConditionID conditionId;
        /// @dev haltTime as seconds since epoch, same as block.timestamp
        /// unsigned 32bit epoch timestamp in seconds should be suitable until year 2106
        uint32 haltTime;
    }

    function prepareConditionByOracle(
        QuestionID questionId,
        uint256 outcomeSlotCount,
        bytes calldata packedPrices,
        uint32 haltTime_
    ) external returns (ConditionID);

    function updateFairPrices(ConditionID conditionId, bytes calldata packedPrices) external;
    function batchUpdateFairPrices(PriceUpdate[] calldata priceUpdates) external;

    function getFairPrices(ConditionID conditionId) external view returns (uint256[] memory fairPriceDecimals);

    function updateHaltTime(ConditionID conditionId, uint32 haltTime) external;

    function batchUpdateHaltTimes(HaltUpdate[] calldata haltUpdates) external;

    /// @dev Returns the halt time of a condition. Will be 0 if no price oracle
    /// is configured (if old prepareCondition was called).
    function haltTime(ConditionID conditionId) external view returns (uint32);

    /// @dev Returns if the condition is halted or already resolved. Halting
    /// only effects price updates. If no price oracle was configured for a
    /// condition, this will always return true. This is ok since it does not
    /// affect any other aspect.
    function isHalted(ConditionID conditionId) external view returns (bool);

    /// @dev combines together balanceOfCondition and getFairPrices into one call to minimize gas usage
    function getPositionInfo(address account, IERC20 collateralToken, ConditionID conditionId)
        external
        view
        returns (uint256[] memory balances, uint256[] memory fairPriceDecimals);

    /// @dev Get the current payouts for a condition.
    function getPayouts(ConditionID conditionId)
        external
        view
        returns (uint256[] memory numerators, uint256 denominator);
}

interface ILegConditionalTokens {
    /// @dev given conditions and indices within those conditions, gives the fair price for the parlay
    function getParlayFairPrices(ConditionID[] calldata conditionIds, uint256[] calldata indices)
        external
        view
        returns (uint256[] memory fairPriceDecimals);

    /// @dev given conditions and indices within those conditions, gives the payout for the parlay
    function getParlayPayouts(ConditionID[] calldata conditionIds, uint256[] calldata indices)
        external
        view
        returns (uint256[] memory numerators, uint256 denominator);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

// Note on libraries. If any functions are not `internal`, then contracts that
// use the libraries, must be linked.

library ArrayMath {
    function sum(uint256[] memory values) internal pure returns (uint256) {
        uint256 result = 0;
        for (uint256 i = 0; i < values.length; i++) {
            result += values[i];
        }
        return result;
    }
}

/// @dev Math with saturation/clamping for overflow/underflow handling
library ClampedMath {
    /// @dev min(upper, max(lower, x))
    function clampBetween(uint256 x, uint256 lower, uint256 upper) internal pure returns (uint256) {
        unchecked {
            return x < lower ? lower : (x > upper ? upper : x);
        }
    }

    /// @dev max(0, a - b)
    function subClamp(uint256 a, uint256 b) internal pure returns (uint256) {
        unchecked {
            return a > b ? a - b : 0;
        }
    }

    /// @dev min(type(uint256).max, max(0, a + b))
    function addClamp(uint256 a, int256 b) internal pure returns (uint256) {
        unchecked {
            if (b < 0) {
                // The absolute value of type(int256).min is not representable
                // in int256, so have to dance about with the + 1
                uint256 positiveB = uint256(-(b + 1)) + 1;
                return (a > positiveB) ? (a - positiveB) : 0;
            } else {
                return type(uint256).max - a > uint256(b) ? a + uint256(b) : type(uint256).max;
            }
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import { Math } from "@openzeppelin/contracts/utils/math/Math.sol";

/// @dev Functions to deal with 16bit prices packed into `bytes`.
/// In prediction markets, prices are within the range [0-1]. As such, arbitrary
/// magnitude and precision are not necessary. By restricting prices to be fixed
/// point integers between 0 and 1e4, we get:
///  - Prices fit in 16 bits
///  - Can be easily renormalized to 1e18 via a multiplier
///
/// The 16bit prices are packed back to back and encoded in big-endian format.
///
/// Some notes:
///
/// Packing/unpacking is done manually and not via solidity's uint16[].
/// uint16[] arrays are still encoded with all the padding. Additionally,
/// working directly with uint16 data types is less efficient than uint256, due
/// to bit shifting and masking that is implicitly done
library PackedPrices {
    using Math for uint256;

    /// @dev a divisor that fits in 16 bits, and easily divides into 1e18
    uint256 internal constant DIVISOR = 1e4;
    /// @dev divisor for majority of decimal calculations
    uint256 internal constant ONE_DECIMAL = 1e18;
    /// @dev We store packed prices in 16 bits with a divisor of 1e4. AMM math
    /// relies on prices having divisor of 1e18. We can go directly from one to
    /// the other by multiplying by 1e14.
    uint256 internal constant DECIMAL_CONVERSION_FACTOR = 1e14;
    /// @dev How many bits to shift to convert between big-endian uint16 and uint256
    uint256 internal constant SHIFT_BITS = 30 * 8;

    /// @dev Given a packed price byte array, unpack into a decimal price array with 1e18 divisor
    /// @param packedPrices packed byte array
    /// @return priceDecimals unpacked price array of prices normalized to 1e18
    function toPriceDecimals(bytes memory packedPrices) internal pure returns (uint256[] memory priceDecimals) {
        unchecked {
            uint256 length = packedPrices.length / 2;
            priceDecimals = new uint256[](length);

            for (uint256 i; i < length; i++) {
                uint256 chunk;
                uint256 offset = 32 + i * 2;
                assembly ("memory-safe") {
                    chunk := mload(add(packedPrices, offset))
                }

                priceDecimals[i] = (chunk >> SHIFT_BITS) * DECIMAL_CONVERSION_FACTOR;
            }
        }
    }

    /// @dev Given a packed price byte array in storage, unpack into a decimal price array with 1e18 divisor
    /// @param packedPrices packed byte array storage pointer
    /// @return priceDecimals unpacked price array of prices normalized to 1e18
    function toPriceDecimalsFromStorage(bytes storage packedPrices) internal pure returns (uint256[] memory) {
        // Much easier to copy the byte array into memory first, and then
        // perform the conversion from memory array, than doing it directly from
        // storage.
        // This is because the storage load instruction `SLOAD` costs 200 gas,
        // while the memory load instruction `MLOAD` costs only 3. The
        // drastically simpler code that loads each integer one at a time would
        // be extremely costly with SLOAD, and would require a different
        // algorithm that amounts to copying into memory first to minimize SLOAD
        // instructions.
        return toPriceDecimals(packedPrices);
    }

    /// @dev Given an array of integers, packs them into a byte array of 16bit values.
    /// Integers are taken as-is, with no re-normalization.
    /// @param prices array of integers less than or equal to type(uint16).max . Otherwise truncation will occur
    /// @param divisor what to divide prices by before packing
    /// @return packedPrices packed byte array
    function toPackedPrices(uint256[] memory prices, uint256 divisor)
        internal
        pure
        returns (bytes memory packedPrices)
    {
        unchecked {
            uint256 length = prices.length;

            // set the size of bytes array
            packedPrices = new bytes(length * 2);

            for (uint256 i; i < length; i++) {
                uint256 adjustedPrice = prices[i] / divisor;
                assert(adjustedPrice <= type(uint16).max);
                uint256 chunk = adjustedPrice << SHIFT_BITS;
                uint256 offset = 32 + i * 2;

                assembly {
                    mstore(add(packedPrices, offset), chunk)
                }
            }
        }
    }

    /// @dev Sums the values in the packed price byte array
    /// @param packedPrices the byte array that encodes the packed prices
    /// @return result the sum of the decoded prices
    function sum(bytes memory packedPrices) internal pure returns (uint256 result) {
        unchecked {
            uint256 length = packedPrices.length / 2;

            for (uint256 i; i < length; i++) {
                uint256 chunk;
                uint256 offset = 32 + i * 2;
                assembly ("memory-safe") {
                    chunk := mload(add(packedPrices, offset))
                }

                result += chunk >> SHIFT_BITS;
            }
        }
    }

    function arrayLength(bytes memory packedPrices) internal pure returns (uint256) {
        return packedPrices.length / 2;
    }

    function valueAtIndex(bytes memory packedPrices, uint256 index) internal pure returns (uint256) {
        uint256 chunk;
        uint256 offset = 32 + index * 2;
        assembly ("memory-safe") {
            chunk := mload(add(packedPrices, offset))
        }

        return (chunk >> SHIFT_BITS);
    }

    // TODO: potentially optimize reading directly from storage
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
 * proxy whose upgrades are fully controlled by the current implementation.
 */
interface IERC1822ProxiableUpgradeable {
    /**
     * @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
     * address.
     *
     * IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
     * bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
     * function revert if invoked through a proxy.
     */
    function proxiableUUID() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.3) (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeaconUpgradeable.sol";
import "../../interfaces/IERC1967Upgradeable.sol";
import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967UpgradeUpgradeable is Initializable, IERC1967Upgradeable {
    function __ERC1967Upgrade_init() internal onlyInitializing {
    }

    function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
    }
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallUUPS(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        // Upgrades from old implementations will perform a rollback test. This test requires the new
        // implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
        // this special case will break upgrade paths from old UUPS implementation to new ones.
        if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
            _setImplementation(newImplementation);
        } else {
            try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (bytes32 slot) {
                require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
            } catch {
                revert("ERC1967Upgrade: new implementation is not UUPS");
            }
            _upgradeToAndCall(newImplementation, data, forceCall);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(
        address newBeacon,
        bytes memory data,
        bool forceCall
    ) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
        }
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function _functionDelegateCall(address target, bytes memory data) private returns (bytes memory) {
        require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
    }

    /**
     * @dev This empty reserved space is put in place to allow future versions to add new
     * variables without shifting down storage in the inheritance chain.
     * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
     */
    uint256[50] private __gap;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { IERC1155Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC1155/IERC1155Upgradeable.sol";

import { ConditionID, QuestionID } from "./CTHelpers.sol";
import { ConditionalTokensErrors } from "./ConditionalTokensErrors.sol";

/// @title Events emitted by conditional tokens
/// @dev Minimal interface to be used for blockchain indexing (e.g subgraph)
interface IConditionalTokensEvents {
    /// @dev Emitted upon the successful preparation of a condition.
    /// @param conditionId The condition's ID. This ID may be derived from the
    /// other three parameters via ``keccak256(abi.encodePacked(oracle,
    /// questionId, outcomeSlotCount))``.
    /// @param oracle The account assigned to report the result for the prepared condition.
    /// @param questionId An identifier for the question to be answered by the oracle.
    /// @param outcomeSlotCount The number of outcome slots which should be used
    /// for this condition. Must not exceed 256.
    event ConditionPreparation(
        ConditionID indexed conditionId, address indexed oracle, QuestionID indexed questionId, uint256 outcomeSlotCount
    );

    event ConditionResolution(
        ConditionID indexed conditionId,
        address indexed oracle,
        QuestionID indexed questionId,
        uint256 outcomeSlotCount,
        uint256[] payoutNumerators
    );

    /// @dev Emitted when a position is successfully split.
    event PositionSplit(
        address indexed stakeholder, IERC20 collateralToken, ConditionID indexed conditionId, uint256 amount
    );
    /// @dev Emitted when positions are successfully merged.
    event PositionsMerge(
        address indexed stakeholder, IERC20 collateralToken, ConditionID indexed conditionId, uint256 amount
    );
    /// @notice Emitted when a subset of outcomes are redeemed for a condition
    event PayoutRedemption(
        address indexed redeemer,
        IERC20 indexed collateralToken,
        ConditionID conditionId,
        uint256[] indices,
        uint256 payout
    );
}

interface IConditionalTokens is IERC1155Upgradeable, IConditionalTokensEvents, ConditionalTokensErrors {
    function prepareCondition(address oracle, QuestionID questionId, uint256 outcomeSlotCount)
        external
        returns (ConditionID);

    function reportPayouts(QuestionID questionId, uint256[] calldata payouts) external;

    function batchReportPayouts(
        QuestionID[] calldata questionIDs,
        uint256[] calldata payouts,
        uint256[] calldata outcomeSlotCounts
    ) external;

    function splitPosition(IERC20 collateralToken, ConditionID conditionId, uint256 amount) external;

    function mergePositions(IERC20 collateralToken, ConditionID conditionId, uint256 amount) external;

    function redeemPositionsFor(
        address receiver,
        IERC20 collateralToken,
        ConditionID conditionId,
        uint256[] calldata indices,
        uint256[] calldata quantities
    ) external returns (uint256);

    function redeemAll(IERC20 collateralToken, ConditionID[] calldata conditionIds, uint256[] calldata indices)
        external;

    function redeemAllOf(
        address ownerAndReceiver,
        IERC20 collateralToken,
        ConditionID[] calldata conditionIds,
        uint256[] calldata indices
    ) external returns (uint256 totalPayout);

    function balanceOfCondition(address account, IERC20 collateralToken, ConditionID conditionId)
        external
        view
        returns (uint256[] memory);

    function isResolved(ConditionID conditionId) external view returns (bool);

    function getPositionIds(IERC20 collateralToken, ConditionID conditionId) external view returns (uint256[] memory);

    // TODO: This should be ok to add to the first interface, since we currently don't use the interface id directly anywhere,
    // and the very first version of the contract did support this function.
    /// @dev number of outcome slots in a condition
    function getOutcomeSlotCount(ConditionID conditionId) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeaconUpgradeable {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.3) (interfaces/IERC1967.sol)

pragma solidity ^0.8.0;

/**
 * @dev ERC-1967: Proxy Storage Slots. This interface contains the events defined in the ERC.
 *
 * _Available since v4.9._
 */
interface IERC1967Upgradeable {
    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Emitted when the beacon is changed.
     */
    event BeaconUpgraded(address indexed beacon);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlotUpgradeable {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        /// @solidity memory-safe-assembly
        assembly {
            r.slot := slot
        }
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

interface ConditionalTokensErrors {
    error ConditionAlreadyPrepared();

    error PayoutAlreadyReported();
    error PayoutsAreAllZero();
    error InvalidOutcomeSlotCountsArray();
    error InvalidPayoutArray();

    error ResultNotReceivedYet();
    error InvalidIndex();
    error NoPositionsToRedeem();

    error ConditionNotFound();
    error InvalidAmount();
    error InvalidOutcomeSlotsAmount();
    error InvalidQuantities();
    error InvalidPrices();
    error InvalidConditionOracle(address conditionOracle);
    error MustBeCalledByOracle();
    error InvalidHaltTime();

    /// @dev using unapproved ERC20 token with protocol
    error InvalidERC20();
}

{
  "remappings": [
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "@openzeppelin/contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/contracts/",
    "@prb/math/=lib/prb-math/src/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "upgrade-scripts/=lib/upgrade-scripts/src/",
    "UDS/=lib/upgrade-scripts/lib/UDS/src/",
    "@prb/test/=lib/prb-math/node_modules/@prb/test/",
    "futils/=lib/upgrade-scripts/lib/UDS/lib/futils/src/",
    "openzeppelin-contracts-upgradeable/=lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "prb-math/=lib/prb-math/src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 600
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
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