check_balance.py

import requests


def get_json(url: str) -> dict:
    resp = requests.get(url)
    try:
        return resp.json()
    except:
        print(f"get_json: error decoding JSON {resp}, with error text: {resp.text}")
        return {}


def account_exists(base_url: str, account_addr: str) -> bool:
    return get_account(base_url, account_addr) is not None


def get_account(base_url: str, account_addr: str) -> dict:
    return get_json(f"{base_url}/rpc/v1/accounts/{account_addr}")


def get_resource_data(base_url: str, account_addr: str, resource_type: str) -> dict:
    res_data = get_json(f"{base_url}/rpc/v1/accounts/{account_addr}/resources/{resource_type}")
    return res_data["result"][0]


def get_account_supra_coin_balance(base_url: str, account_addr: str) -> int:
    if not account_exists(base_url, account_addr):
        return 0
    res_data = get_resource_data(base_url, account_addr, "0x1::coin::CoinStore<0x1::supra_coin::SupraCoin>")
    return int(res_data["coin"]["value"])


if __name__ == "__main__":
    is_testnet = False
    base_url = "https://rpc-testnet1.supra.com" if is_testnet else "https://rpc-mainnet.supra.com"

    account_addr = "e3948c9e3a24c51c4006ef2acc44606055117d021158f320062df099c4a94150"
    print("Balance:", get_account_supra_coin_balance(base_url, account_addr))