# ABI

## 4byte

Search for the function signature corresponding to the 4byte selector at https://openchain.xyz/signatures.

```
peth > 4byte 0xa9059cbb
transfer(address,uint256)

peth > 4byte transfer(address,uint256)
0x0e0c3f58 super_transfer(address,uint256)
0x0f822b78 admin_transfer(address,uint256)
0x1c6a866c Collect_accrued_interest_and_transfer(address,uint256)
0x429393ba beforetransfer(address,uint256)
0x4847a79c _transfer(address,uint256)
0x494e4bc3 fundtransfer(address,uint256)
0x52ec8a58 mint_and_transfer(address,uint256)
0x7f0cd33c ApproveAndtransfer(address,uint256)
0x82d04bd4 _complianttransfer(address,uint256)
0xa9059cbb transfer(address,uint256)
0xbb36a233 customtransfer(address,uint256)
0xef0f2365 approve_transfer(address,uint256)
0xfd1e582d ownertransfer(address,uint256)
13 item(s) found in 4byte.json.
Full match: 0xa9059cbb transfer(address,uint256)
```

## abi_encode

Input the method signature and parameters, and output the bytes after `abi.encode` encoding.

```
peth > abi_encode test(uint256,string,address,string) 0x1000 "AAAA" 0x418e63cab75812661b055e111336dfc32951135d "BBBB"
0xeb7f0ebe00000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000418e63cab75812661b055e111336dfc32951135d00000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000004414141410000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044242424200000000000000000000000000000000000000000000000000000000
```

## abi_decode

After identifying the function signature based on the selector, print the decoded result.

```
peth > abi_decode 0xa9059cbb000000000000000000000000418e63cab75812661b055e111336dfc32951135d000000000000000000000000000000000000000000000000000000000c28cb00
Method: function transfer(address arg0, uint256 arg1) returns ()
Arguments:
     arg0 : 0x418e63cab75812661b055e111336dfc32951135d
     arg1 : 204000000
```

If the corresponding signature cannot be found, the parameter types are automatically inferred. 

```
peth > abi_decode 0xeb7f0ebe00000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000418e63cab75812661b055e111336dfc32951135d00000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000004414141410000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044242424200000000000000000000000000000000000000000000000000000000
No signature found for selector 0xeb7f0ebe.
Guessing types ...
[0] +0x0   uint256   4096 (0x1000)
[1] +0x20   string   AAAA       // offset 0x80 length 4
[2] +0x40   address   0x418e63cab75812661b055e111336dfc32951135d
[3] +0x60   string   BBBB       // offset 0xc0 length 4
[4] +0x80   uint256   4 (0x4)
[5] +0xa0   unknown   0x4141414100000000000000000000000000000000000000000000000000000000
[6] +0xc0   uint256   4 (0x4)
[7] +0xe0   unknown   0x4242424200000000000000000000000000000000000000000000000000000000
```

也可直接指定签名进行解码。
```
peth > abi_decode 0xeb7f0ebe00000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000418e63cab75812661b055e111336dfc32951135d00000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000004414141410000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044242424200000000000000000000000000000000000000000000000000000000  test(uint256,string,address,string)
Method: function test(uint256 arg0, string arg1, address arg2, string arg3) returns ()
Arguments:
     arg0 : 4096
     arg1 : AAAA
     arg2 : 0x418e63cab75812661b055e111336dfc32951135d
     arg3 : BBBB
```