forked from DecentralizedClimateFoundation/DCIPs
36 lines
1.1 KiB
Solidity
36 lines
1.1 KiB
Solidity
// SPDX-License-Identifier: CC0-1.0
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pragma solidity ^0.8.0;
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contract Verifier {
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function verifyOwnership(
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address token,
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uint256 tokenId
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) internal {
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// bytes(keccak256(bytes('ownerOf(uint256)')));
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(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x6352211e, tokenId));
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require(
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success && (data.length == 32 && bytesToAddress(data) == address(this)),
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"Verifier::verifyOwnership: NFT ownership verification failed"
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);
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}
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function getOwner(
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address token,
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uint256 tokenId
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) internal returns(address) {
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// bytes(keccak256(bytes('ownerOf(uint256)')));
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(bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x6352211e, tokenId));
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require(
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success && (data.length == 32),
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"Verifier::getOwner: NFT ownership verification failed"
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);
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return bytesToAddress(data);
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}
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function bytesToAddress(bytes memory bys) internal pure returns (address addr) {
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assembly {
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addr := mload(add(bys,32))
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}
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}
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} |