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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

interface IERC20 {
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}

contract BatchTransfer {
    error BatchTransfer__IncorrectEtherSent(uint256 required, uint256 sent);
    error BatchTransfer__EtherTransferFailed();
    error BatchTransfer__ERC20TransferFailed();

    event BatchTransferEtherComplete(uint256 indexed amountSentToEachRecipient, uint256 indexed totalRecipients);
    event BatchTransferERC20Complete(uint256 indexed amountSentToEachRecipient, uint256 indexed totalRecipients);

    // Transfer ether to multiple addresses in a single call
    function batchTransferEther(address[] calldata recipients, uint256 amount) external payable {
        if (msg.value != recipients.length * amount) {
            revert BatchTransfer__IncorrectEtherSent(recipients.length * amount, msg.value);
        }

        for (uint256 i = 0; i < recipients.length; i++) {
            (bool success,) = recipients[i].call{value: amount}("");
            if (!success) {
                revert BatchTransfer__EtherTransferFailed();
            }
        }

        emit BatchTransferEtherComplete(amount, recipients.length);
    }

    // Transfer ERC-20 tokens to multiple addresses in a single call
    function batchTransferERC20(address tokenAddress, address[] calldata recipients, uint256 amount) external {
        IERC20 token = IERC20(tokenAddress);

        for (uint256 i = 0; i < recipients.length; i++) {
            bool success = token.transferFrom(msg.sender, recipients[i], amount);
            if (!success) {
                revert BatchTransfer__ERC20TransferFailed();
            }
        }

        emit BatchTransferERC20Complete(amount, recipients.length);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

[{"inputs":[],"name":"BatchTransfer__ERC20TransferFailed","type":"error"},{"inputs":[],"name":"BatchTransfer__EtherTransferFailed","type":"error"},{"inputs":[{"internalType":"uint256","name":"required","type":"uint256"},{"internalType":"uint256","name":"sent","type":"uint256"}],"name":"BatchTransfer__IncorrectEtherSent","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"amountSentToEachRecipient","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"totalRecipients","type":"uint256"}],"name":"BatchTransferERC20Complete","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"amountSentToEachRecipient","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"totalRecipients","type":"uint256"}],"name":"BatchTransferEtherComplete","type":"event"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"address[]","name":"recipients","type":"address[]"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"batchTransferERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"recipients","type":"address[]"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"batchTransferEther","outputs":[],"stateMutability":"payable","type":"function"}]

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