Slide 5
Slide 5 text
ERC20とERC721の違い
5
function _mint(address to, uint256 tokenId) internal virtual {
_beforeTokenTransfer(address(0), to, tokenId);
_balances[to] += 1;
_owners[tokenId] = to;
}
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual { }
function _mint(address account, uint256 amount) internal virtual {
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
}
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
ERC20
ERC721
https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/ERC20.sol
https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721.sol