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feat: ERC721 but only get 3 points

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Ting-Jun Wang 2024-03-21 15:41:35 +08:00
parent 4ae4befa2b
commit 017dae519f
Signed by: snsd0805
GPG Key ID: D175E969960C4B16
1 changed files with 36 additions and 0 deletions
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36
hw1/src/NFinTech/NFinTech.sol
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@ -76,22 +76,58 @@ contract NFinTech is IERC721 {
function setApprovalForAll(address operator, bool approved) external {
// TODO: please add your implementaiton here
address from = msg.sender;
if (operator != address(0)) {
_operatorApproval[from][operator] = approved;
emit ApprovalForAll(from, operator, approved);
} else {
revert();
}
}
function isApprovedForAll(address owner, address operator) public view returns (bool) {
// TODO: please add your implementaiton here
return _operatorApproval[owner][operator];
}
function approve(address to, uint256 tokenId) external {
// TODO: please add your implementaiton here
address from = msg.sender;
address owner = _owner[tokenId];
if ((owner == from) || _operatorApproval[owner][from]) {
emit Approval(owner, to, tokenId);
_tokenApproval[tokenId] = to;
} else {
revert();
}
}
function getApproved(uint256 tokenId) public view returns (address operator) {
// TODO: please add your implementaiton here
return _tokenApproval[tokenId];
}
function transferFrom(address from, address to, uint256 tokenId) public {
// TODO: please add your implementaiton here
address owner = _owner[tokenId];
if (
(
(_tokenApproval[tokenId] == msg.sender && owner == from) ||
(_operatorApproval[from][msg.sender] && owner == from)
) &&
to != address(0)
) {
emit Transfer(owner, to, tokenId);
_owner[tokenId] = to;
_balances[owner] -= 1;
_balances[to] += 1;
} else {
revert();
}
}
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) public {