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ERC721C.sol
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ERC721C.sol
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
import "../utils/CreatorTokenBase.sol";
import "../token/erc721/ERC721OpenZeppelin.sol";
/**
* @title ERC721C
* @author Limit Break, Inc.
* @notice Extends OpenZeppelin's ERC721 implementation with Creator Token functionality, which
* allows the contract owner to update the transfer validation logic by managing a security policy in
* an external transfer validation security policy registry. See {CreatorTokenTransferValidator}.
*/
abstract contract ERC721C is ERC721OpenZeppelin, CreatorTokenBase {
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(ICreatorToken).interfaceId || super.supportsInterface(interfaceId);
}
/// @dev Ties the open-zeppelin _beforeTokenTransfer hook to more granular transfer validation logic
function _beforeTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize) internal virtual override {
for (uint256 i = 0; i < batchSize;) {
_validateBeforeTransfer(from, to, firstTokenId + i);
unchecked {
++i;
}
}
}
/// @dev Ties the open-zeppelin _afterTokenTransfer hook to more granular transfer validation logic
function _afterTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize) internal virtual override {
for (uint256 i = 0; i < batchSize;) {
_validateAfterTransfer(from, to, firstTokenId + i);
unchecked {
++i;
}
}
}
}
/**
* @title ERC721CInitializable
* @author Limit Break, Inc.
* @notice Initializable implementation of ERC721C to allow for EIP-1167 proxy clones.
*/
abstract contract ERC721CInitializable is ERC721OpenZeppelinInitializable, CreatorTokenBase {
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(ICreatorToken).interfaceId || super.supportsInterface(interfaceId);
}
/// @dev Ties the open-zeppelin _beforeTokenTransfer hook to more granular transfer validation logic
function _beforeTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize) internal virtual override {
for (uint256 i = 0; i < batchSize;) {
_validateBeforeTransfer(from, to, firstTokenId + i);
unchecked {
++i;
}
}
}
/// @dev Ties the open-zeppelin _afterTokenTransfer hook to more granular transfer validation logic
function _afterTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize) internal virtual override {
for (uint256 i = 0; i < batchSize;) {
_validateAfterTransfer(from, to, firstTokenId + i);
unchecked {
++i;
}
}
}
}