Solidity Interface & Canonical Declaration
function flashLoanSimple(address receiverAddress, address asset, uint256 amount, bytes calldata params, uint16 referralCode) external
允许智能合约在单笔交易内无需任何抵押极速借用巨额资金，只要在同笔交易结束前本息完整归还即可。
理论基础执行 Gas： 180,000 ~ 350,000 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) | flashLoanSimple(address,address,uint256,bytes,uint16) 的 4 字节函数选择器 |
| 0x04 ~ 0x23 (32B) | address | receiverAddress | 执行闪电贷回调逻辑的合约地址 |
| 0x24 ~ 0x43 (32B) | address | asset | 借出的资产合约 |
| 0x44 ~ 0x63 (32B) | uint256 | amount | 借款金额 |
| 0x64 ~ 0x83 (32B) | bytes | params | 透传给回调函数的自定义参数 |
| 0x84 ~ 0xa3 (32B) | uint16 | referralCode | 渠道代码 |
Keccak-256 密码学哈希推导链
标准 ASCII 签名字符串： flashLoanSimple(address,address,uint256,bytes,uint16)
完整 256 位 Keccak 哈希： 0x42b0b77cfe1bf166455e478921853710404463f1215ab68b05bf0a573f5b9130
截取前 4 字节 (Big-Endian)： 0x42b0b77c
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 0x42b0b77c and branch
[0x0006] DUP1
[0x0007] PUSH4 0x42b0b77c
[0x000c] EQ
[0x000d] PUSH2 0x0050
[0x0010] JUMPI // Jump to implementation if matched