// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023. // SPDX-License-Identifier: MIT pragma solidity ^0.8.7; /** helper methods for interacting with ERC20 tokens that do not consistently return true/false with the addition of a transfer function to send eth or an erc20 token */ library TransferHelper { function safeApprove( address token, address to, uint256 value ) internal { (bool success, bytes memory data) = token.call( abi.encodeWithSelector(0x095ea7b3, to, value) ); require( success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: APPROVE_FAILED" ); } function saveTransferEth( 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"); } function safeTransfer( address token, address to, uint256 value ) internal { (bool success, bytes memory data) = token.call( abi.encodeWithSelector(0xa9059cbb, to, value) ); require( success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: TRANSFER_FAILED" ); } function safeApproveForAllNFT1155( address token, address operator, bool approved ) internal { (bool success, bytes memory data) = token.call( abi.encodeWithSelector(0xa22cb465, operator, approved) ); require( success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: APPROVE_NFT1155_FAILED" ); } function safeTransferNFT1155( address token, address from, address to, uint256 id, uint256 amount, bytes memory dataValue ) internal { (bool success, bytes memory data) = token.call( abi.encodeWithSelector(0xf242432a, from, to, id, amount, dataValue) ); require( success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: TRANSFER_NFT1155_FAILED" ); } function safeMintNFT( address token, address to ) internal { (bool success, bytes memory data) = token.call( abi.encodeWithSelector(0x40d097c3, to) ); require( success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: MINT_NFT_FAILED" ); } function safeApproveForAll( address token, address to, bool value ) internal { (bool success, bytes memory data) = token.call( abi.encodeWithSelector(0xa22cb465, to, value) ); require( success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: APPROVE_FAILED" ); } function safeTransferFrom( address token, address from, address to, uint256 value ) internal { (bool success, bytes memory data) = token.call( abi.encodeWithSelector(0x23b872dd, from, to, value) ); require( success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: TRANSFER_FROM_FAILED" ); } // sends ETH or an erc20 token function safeTransferBaseToken( address token, address payable to, uint256 value, bool isERC20 ) internal { if (!isERC20) { to.transfer(value); } else { (bool success, bytes memory data) = token.call( abi.encodeWithSelector(0xa9059cbb, to, value) ); require( success && (data.length == 0 || abi.decode(data, (bool))), "TransferHelper: TRANSFER_FAILED" ); } } }