This is a script to check if there are function selector's collision.

pythonCheckFunctionSelector.py

from web3 import Web3
import os
import hashlib


# Function to extract signatures
def extract_function_signatures(src):
    lines = src.split("\n")
    function_lines = [
        line.strip() for line in lines if line.strip().startswith("function")
    ]
    functions = [
        line.split("(")[0].replace("function", "").strip() for line in function_lines
    ]
    return functions


# Compute function selectors
def compute_selectors(functions):
    return {func: Web3.keccak(primitive=func.encode()).hex()[:10] for func in functions}


# Load contract sources
with open("src/Distributor.sol", "r") as file:
    distributor_src = file.read()

with open("src/ProxyFactory.sol", "r") as file:
    proxy_factory_src = file.read()

# Extract function signatures
distributor_functions = extract_function_signatures(distributor_src)
proxy_factory_functions = extract_function_signatures(proxy_factory_src)

# Compute the function selectors
distributor_selectors = compute_selectors(distributor_functions)
proxy_factory_selectors = compute_selectors(proxy_factory_functions)

# Check for collisions
collisions = []
for func, selector in distributor_selectors.items():
    for pfunc, pselector in proxy_factory_selectors.items():
        if selector == pselector and func != pfunc:
            collisions.append((func, pfunc, selector))

print(collisions)

Credits to @johnlaw8854 on discord.