Solidity Interface & Canonical Declaration
function grantRole(bytes32 role, address account) external
为指定账户授予角色权限,仅限拥有该角色管理权限的管理员调用。
理论基础执行 Gas: 28,000 ~ 55,000 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) | grantRole(bytes32,address) 的 4 字节函数选择器 |
| 0x04 ~ 0x23 (32B) | bytes32 | role | 待授予的角色标识符 |
| 0x24 ~ 0x43 (32B) | address | account | 接收角色的账户 |
Keccak-256 密码学哈希推导链
标准 ASCII 签名字符串: grantRole(bytes32,address)
完整 256 位 Keccak 哈希: 0x2f2ff15deca029b64bbc0874ae59c8f39be024a95aa718b4c13ca407db350be8
截取前 4 字节 (Big-Endian): 0x2f2ff15d
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 0x2f2ff15d and branch
[0x0006] DUP1
[0x0007] PUSH4 0x2f2ff15d
[0x000c] EQ
[0x000d] PUSH2 0x0050
[0x0010] JUMPI // Jump to implementation if matched