以太坊NFT代码示例(合约地址0x6d2e83a559c1fbe0cc677d10a22f28f0f8b1f325)
pragmasolidity^0.4.21;/***@titleOwnable*@devTheOwnablecontracthasanowneraddress,andprovidesbasicauthorizationcontrol*functions,thissimplifiestheimplementationof"userpermissions".*/contractOwnable{addr