标签:function account tokenId uint256 常用 external address ETH 合约
contract Test {
event NFTReceived(address operator, address from, uint256 tokenId, bytes data);
function onERC721Received(address operator, address from, uint256 tokenId, bytes memory data) public returns (bytes4) {
//only receive the _nft staff
if(address(this) != operator) {
//invalid from nft
return 0;
}
//success
emit NFTReceived(operator, from, tokenId, data);
return bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"));
}
// 从合约中转进账户 ERC20
function erc20income(IERC20 asset, address account, uint256 balance) external {
asset.transferFrom(account, address(this), balance);
}
// 从账户转进合约中 ERC20
function erc20withdraw(IERC20 asset, address account) external returns (uint256 balance) {
balance = asset.balanceOf(address(this));
asset.transfer(account, balance);
}
// 从账户转到合约
function nftWithdraw(IERC721 token, address account, uint256 tokenId) external {
token.safeTransferFrom(address(this), account, tokenId);
}
// 从账户转到合约
function nft2Contract(IERC721 token, address account, uint256 tokenId) external {
token.safeTransferFrom(account, address(this), tokenId);
}
// 从合约中转出去 ETH
function ethWithdraw(address payable account) external {
uint256 _currentBalance = address(this).balance;
account.transfer(_currentBalance);
}
// 从合约中转出去 ETH
function ethIncome() external payable {
}
// 可以直接转账 ETH
function () external payable {}
}
标签:function,account,tokenId,uint256,常用,external,address,ETH,合约 来源: https://www.cnblogs.com/ShaoYinling/p/14977312.html
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