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Implement ERC721

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Aadi Desai 2023-02-07 00:59:28 +00:00
parent 1c93831b80
commit 134518387e
1 changed files with 159 additions and 21 deletions
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180
src/ERC721.sol
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@ -1,66 +1,204 @@
// SPDX-License-Identifier: UNLICENSED // SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.17; pragma solidity ^0.8.17;
import "./libraries/StringUtils.sol";
import "./interfaces/IERC20.sol"; import "./interfaces/IERC20.sol";
import "./interfaces/IERC721.sol"; import "./interfaces/IERC721.sol";
contract ERC721 is IERC721Metadata { contract ERC721 is IERC721Metadata {
mapping(uint256 => address) _approvals;
mapping(address => uint256) _balances;
mapping(address => mapping(address => bool)) _fullApprovals;
mapping(uint256 => address) _owners;
address _contractOwner;
string _name;
string _symbol;
string _baseUri;
IERC20 public _paymentToken;
uint256 _tokenPrice;
uint256 _totalSupply;
constructor( constructor(
string memory name, string memory newName,
string memory symbol, string memory newSymbol,
string memory baseUri, string memory newBaseUri,
IERC20 paymentToken, IERC20 newPaymentToken,
uint256 initialTokenPrice uint256 newInitialTokenPrice
) {} ) {
_contractOwner = msg.sender;
_name = newName;
_symbol = newSymbol;
_baseUri = newBaseUri;
_paymentToken = newPaymentToken;
_tokenPrice = newInitialTokenPrice;
_totalSupply = 0;
}
function mint(address to) external {} function mint(address to) external {
require(
_paymentToken.allowance(msg.sender, address(this)) >= _tokenPrice,
"insufficient allowance"
);
uint256 tokenId = _totalSupply + 1;
_totalSupply += tokenId;
_balances[to] += 1;
_owners[tokenId] = to;
_paymentToken.transferFrom(msg.sender, address(0), _tokenPrice);
emit Transfer(address(0), to, tokenId);
_tokenPrice += _tokenPrice / 10;
}
function balanceOf(address _owner) external view returns (uint256) {} function balanceOf(address _owner) external view returns (uint256) {
return _balances[_owner];
}
function ownerOf(uint256 _tokenId) external view returns (address) {} function ownerOf(uint256 _tokenId) external view returns (address) {
return _owners[_tokenId];
}
function transferFrom( function transferFrom(
address _from, address _from,
address _to, address _to,
uint256 _tokenId uint256 _tokenId
) external {} ) external {
require(_from == _owners[_tokenId]);
require(
msg.sender == _owners[_tokenId] ||
msg.sender == _approvals[_tokenId] ||
this.isApprovedForAll(_owners[_tokenId], msg.sender),
"not authorized"
);
_approvals[_tokenId] = address(0);
_balances[_from] -= 1;
_owners[_tokenId] = _to;
emit Transfer(_from, _to, _tokenId);
}
function approve(address _approved, uint256 _tokenId) external {} function approve(address _approved, uint256 _tokenId) external {
require(msg.sender == _owners[_tokenId], "not authorized");
_approvals[_tokenId] = _approved;
emit Approval(msg.sender, _approved, _tokenId);
}
function getApproved(uint256 _tokenId) external view returns (address) {} function getApproved(uint256 _tokenId) external view returns (address) {
return _approvals[_tokenId];
}
function name() external view returns (string memory _name) {} function name() external view returns (string memory) {
return _name;
}
function symbol() external view returns (string memory _symbol) {} function symbol() external view returns (string memory) {
return _symbol;
}
function tokenURI(uint256 _tokenId) external view returns (string memory) {} function tokenURI(uint256 _tokenId) external view returns (string memory) {
return string.concat(_baseUri, StringUtils.toString(_tokenId));
}
// Bonus functions // Bonus functions
function supportsInterface(bytes4 interfaceID) function supportsInterface(bytes4 interfaceID)
external external
view pure
returns (bool) returns (bool)
{} {
return interfaceID == 0x80ac58cd;
}
function safeTransferFrom( function safeTransferFrom(
address _from, address _from,
address _to, address _to,
uint256 _tokenId, uint256 _tokenId,
bytes memory data bytes memory data
) external {} ) external {
require(
_from == _owners[_tokenId],
"_from does not own token _tokenId"
);
require(
msg.sender == _owners[_tokenId] ||
msg.sender == _approvals[_tokenId] ||
_fullApprovals[_owners[_tokenId]][msg.sender],
"not authorized"
);
require(_to != address(0), "can't send to 0x0");
require(_tokenId <= _totalSupply, "invalid tokenId");
_approvals[_tokenId] = address(0);
_balances[_from] -= 1;
_owners[_tokenId] = _to;
emit Transfer(_from, _to, _tokenId);
uint256 _toSize;
assembly {
_toSize := extcodesize(_to)
}
if (_toSize > 0) {
(, bytes memory result) = _to.staticcall(
abi.encodeWithSignature(
"onERC721Received(address,address,uint256,bytes)",
_from,
_to,
_tokenId,
data
)
);
if (bytes4(result) != 0x150b7a02) {
revert("magic value not returned");
}
}
}
function safeTransferFrom( function safeTransferFrom(
address _from, address _from,
address _to, address _to,
uint256 _tokenId uint256 _tokenId
) external {} ) external {
require(
_from == _owners[_tokenId],
"_from does not own token _tokenId"
);
require(
msg.sender == _owners[_tokenId] ||
msg.sender == _approvals[_tokenId] ||
_fullApprovals[_owners[_tokenId]][msg.sender],
"not authorized"
);
require(_to != address(0), "can't send to 0x0");
require(_tokenId <= _totalSupply, "invalid tokenId");
_approvals[_tokenId] = address(0);
_balances[_from] -= 1;
_owners[_tokenId] = _to;
emit Transfer(_from, _to, _tokenId);
uint256 _toSize;
assembly {
_toSize := extcodesize(_to)
}
if (_toSize > 0) {
(, bytes memory result) = _to.staticcall(
abi.encodeWithSignature(
"onERC721Received(address,address,uint256,bytes)",
_from,
_to,
_tokenId,
""
)
);
if (bytes4(result) != 0x150b7a02) {
revert("magic value not returned");
}
}
}
function setApprovalForAll(address _operator, bool _approved) external {} function setApprovalForAll(address _operator, bool _approved) external {
_fullApprovals[msg.sender][_operator] = _approved;
emit ApprovalForAll(msg.sender, _operator, _approved);
}
function isApprovedForAll(address _owner, address _operator) function isApprovedForAll(address _owner, address _operator)
external external
view view
returns (bool) returns (bool)
{} {
return _fullApprovals[_owner][_operator];
}
} }