Beacon chain: count withdrawal credentials by type

beacon_chain_withdrawal_type_count.py

import requests

# make the API request
url = "http://localhost:4000/eth/v1/beacon/states/head/validators"
response = requests.get(url)

# check if request was successful
if response.status_code != 200:
    print(f"Error: API request returned status code {response.status_code}")
    exit()

# extract withdrawal credentials from response
data = response.json()["data"]
withdrawal_credentials = [v["validator"]["withdrawal_credentials"] for v in data]

# count withdrawal credentials that start with 0x00 or 0x01
num_00 = sum(1 for c in withdrawal_credentials if c.startswith("0x00"))
num_01 = sum(1 for c in withdrawal_credentials if c.startswith("0x01"))

# print the results
print(f"Number of withdrawal credentials starting with 0x00: {num_00}")
print(f"Number of withdrawal credentials starting with 0x01: {num_01}")