// SPDX-License-Identifier: MIT pragma solidity ^0.8.20; import {IERC1155Receiver} from "../IERC1155Receiver.sol"; import {IERC1155Errors} from "../../../interfaces/draft-IERC6093.sol"; /** * @dev Library that provide common ERC-1155 utility functions. * * See https://eips.ethereum.org/EIPS/eip-1155[ERC-1155]. */ library ERC1155Utils { /** * @dev Performs an acceptance check for the provided `operator` by calling {IERC1155-onERC1155Received} * on the `to` address. The `operator` is generally the address that initiated the token transfer (i.e. `msg.sender`). * * The acceptance call is not executed and treated as a no-op if the target address is doesn't contain code (i.e. an EOA). * Otherwise, the recipient must implement {IERC1155Receiver-onERC1155Received} and return the acceptance magic value to accept * the transfer. */ function checkOnERC1155Received( address operator, address from, address to, uint256 id, uint256 value, bytes memory data ) internal { if (to.code.length > 0) { try IERC1155Receiver(to).onERC1155Received(operator, from, id, value, data) returns (bytes4 response) { if (response != IERC1155Receiver.onERC1155Received.selector) { // Tokens rejected revert IERC1155Errors.ERC1155InvalidReceiver(to); } } catch (bytes memory reason) { if (reason.length == 0) { // non-IERC1155Receiver implementer revert IERC1155Errors.ERC1155InvalidReceiver(to); } else { /// @solidity memory-safe-assembly assembly { revert(add(32, reason), mload(reason)) } } } } } /** * @dev Performs a batch acceptance check for the provided `operator` by calling {IERC1155-onERC1155BatchReceived} * on the `to` address. The `operator` is generally the address that initiated the token transfer (i.e. `msg.sender`). * * The acceptance call is not executed and treated as a no-op if the target address is doesn't contain code (i.e. an EOA). * Otherwise, the recipient must implement {IERC1155Receiver-onERC1155Received} and return the acceptance magic value to accept * the transfer. */ function checkOnERC1155BatchReceived( address operator, address from, address to, uint256[] memory ids, uint256[] memory values, bytes memory data ) internal { if (to.code.length > 0) { try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, values, data) returns ( bytes4 response ) { if (response != IERC1155Receiver.onERC1155BatchReceived.selector) { // Tokens rejected revert IERC1155Errors.ERC1155InvalidReceiver(to); } } catch (bytes memory reason) { if (reason.length == 0) { // non-IERC1155Receiver implementer revert IERC1155Errors.ERC1155InvalidReceiver(to); } else { /// @solidity memory-safe-assembly assembly { revert(add(32, reason), mload(reason)) } } } } } }