ERC-1967 Proxy Upgradeability KECCAK-256 VERIFIED
WEB3 逆向安全工程 // ERC-1967 标准
0x4f1ef286

Solidity Interface & Canonical Declaration

function upgradeToAndCall(address newImplementation, bytes data) external payable

原子性更新代理合约的逻辑实现,并立即在新的实现上通过 delegatecall 执行初始化函数。

理论基础执行 Gas: 35,000 ~ 95,000 gas
返回值类型: void

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) upgradeToAndCall(address,bytes) 的 4 字节函数选择器
0x04 ~ 0x23 (32B) address newImplementation 新的逻辑实现合约
0x24 ~ 0x43 (32B) bytes data 初始化函数调用编码数据

Keccak-256 密码学哈希推导链

标准 ASCII 签名字符串: upgradeToAndCall(address,bytes)
完整 256 位 Keccak 哈希: 0x4f1ef2866b98625bdfefae89411f7a82754ac4089eff8e78c8832329a538337f
截取前 4 字节 (Big-Endian): 0x4f1ef286

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 0x4f1ef286 and branch [0x0006] DUP1 [0x0007] PUSH4 0x4f1ef286 [0x000c] EQ [0x000d] PUSH2 0x0050 [0x0010] JUMPI // Jump to implementation if matched