fix(cast) lowercase selectors before send API request to openchain.xyz

[cdump]

Motivation

cast 4byte-decode is broken, using the command from reference example:

on Nightly (2023-12-02):

$ cast 4byte-decode 0x1F1F897F676d00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003e7

Error:
Could not decode response:
 {"ok":true,"result":{"event":{},"function":{"0x1F1F897F":null,"0x1f1f897f":[{"name":"fulfillRandomness(bytes32,uint256)","filtered":false}]}}}
.
Error: invalid type: null, expected a sequence at line 1 column 61

on master:

$ cast 4byte-decode 0x1F1F897F676d00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003e7

Error:
No signature found

Solution

We need to lowercase the selectors before sending API request to openchain API, after the fix:

$ cast 4byte-decode 0x1F1F897F676d00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003e7

1) "fulfillRandomness(bytes32,uint256)"
0x676d000000000000000000000000000000000000000000000000000000000000
999