Solidity Interface & Canonical Declaration
function burn(uint256 amount) external
从调用者自身余额中销毁指定数量的代币,永久减少代币全网总流通量。
理论基础执行 Gas: 28,000 ~ 50,000 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) | burn(uint256) 的 4 字节函数选择器 |
| 0x04 ~ 0x23 (32B) | uint256 | amount | 待销毁的代币数量 |
Keccak-256 密码学哈希推导链
标准 ASCII 签名字符串: burn(uint256)
完整 256 位 Keccak 哈希: 0x42966c689b5afe9b9b3f8a7103b2a19980d59629bfd6a20a60972312ed41d836
截取前 4 字节 (Big-Endian): 0x42966c68
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 0x42966c68 and branch
[0x0006] DUP1
[0x0007] PUSH4 0x42966c68
[0x000c] EQ
[0x000d] PUSH2 0x0050
[0x0010] JUMPI // Jump to implementation if matched