ERC-721 / ERC-1155 NFT Standard KECCAK-256 VERIFIED
WEB3 逆向安全工程 // ERC-721 / ERC-1155 标准
0xe985e9c5

Solidity Interface & Canonical Declaration

function isApprovedForAll(address owner, address operator) external view returns (bool)

查询指定操作员(operator)是否已被授予对资产所有者(owner)全部代币资产的管理权限。

理论基础执行 Gas: 2,100 ~ 4,000 gas (view)
返回值类型: bool

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) isApprovedForAll(address,address) 的 4 字节函数选择器
0x04 ~ 0x23 (32B) address owner 资产所有者地址
0x24 ~ 0x43 (32B) address operator 待核验的操作员地址

Keccak-256 密码学哈希推导链

标准 ASCII 签名字符串: isApprovedForAll(address,address)
完整 256 位 Keccak 哈希: 0xe985e9c5c6636c6879256001057b28ccac7718ef0ac56553ff9b926452cab8a3
截取前 4 字节 (Big-Endian): 0xe985e9c5

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 0xe985e9c5 and branch [0x0006] DUP1 [0x0007] PUSH4 0xe985e9c5 [0x000c] EQ [0x000d] PUSH2 0x0050 [0x0010] JUMPI // Jump to implementation if matched