Solidity Interface & Canonical Declaration
function ownerOf(uint256 tokenId) external view returns (address)
查询并返回指定 NFT 代币 ID(tokenId)当前的所有者以太坊地址。
理论基础执行 Gas: 2,100 ~ 4,500 gas (view)
返回值类型: address
Calldata 调用数据 ABI 编码布局账本
| Calldata Offset | Type | Parameter Name | Semantic Role |
|---|---|---|---|
| 0x00 ~ 0x03 (4B) | bytes4 | Method ID (msg.sig) | ownerOf(uint256) 的 4 字节函数选择器 |
| 0x04 ~ 0x23 (32B) | uint256 | tokenId | NFT 代币的唯一数字标识符 |
Keccak-256 密码学哈希推导链
标准 ASCII 签名字符串: ownerOf(uint256)
完整 256 位 Keccak 哈希: 0x6352211e6566aa027e75ac9dbf2423197fbd9b82b9d981a3ab367d355866aa1c
截取前 4 字节 (Big-Endian): 0x6352211e
EVM 运行时调度器汇编代码特征 (Dispatcher Opcodes)
// 1. Load the first 32 bytes of transaction calldata
[0x0000] PUSH1 0x00
[0x0002] CALLDATALOAD
// 2. Right-shift by 224 bits (0xe0) to isolate the 4-byte selector
[0x0003] PUSH1 0xe0
[0x0005] SHR
// 3. Match against target selector 0x6352211e and branch
[0x0006] DUP1
[0x0007] PUSH4 0x6352211e
[0x000c] EQ
[0x000d] PUSH2 0x0050
[0x0010] JUMPI // Jump to implementation if matched