#! /usr/bin/env python3
# -*- coding: utf-8 -*-
from hashlib import sha256

import json
import requests

DEFAULT_RPC_REGTEST_PORT = "18443"
DEFAULT_RPC_TEST_PORT = "18332"
DEFAULT_RPC_MAIN_PORT = "8332"

rpcAddress = "127.0.0.1"
rpcPort = DEFAULT_RPC_MAIN_PORT
rpcUser = "rpcuser"
rpcPassword = "rpcpassword"
rpcUrl = "http://" + rpcAddress + ":" + rpcPort

headers = {'content-type': 'application/json'}


# Double HASH SHA256
def double_sha256(data): return sha256(sha256(data).digest()).digest()


# Reverse
def r(data): return data[::-1]


def request_rpc(method, params):
    payload = json.dumps(
        {
            "method": method,
            "params": params
        }
    )
    return requests.request("POST", rpcUrl, data=payload, headers=headers,
                            auth=(rpcUser, rpcPassword))


if __name__ == "__main__":
    res = request_rpc(method="getblock", params=["00000000000000000000bd684e36789d16da2cf5b08b47deb72d1448a73eae5c"])
    tx = res.json()["result"]["tx"]

    hashes = [bytes.fromhex(x) for x in tx]
    while len(hashes) > 1:
        if len(hashes) % 2 == 1:
            hashes.append(hashes[-1])
        parent_level = []
        for i in range(0, len(hashes), 2):
            x = r(double_sha256(r(hashes[i]) + r(hashes[i + 1])))
            parent_level.append(x)
        hashes = parent_level
    merkleroot = hashes[0].hex()
    print(merkleroot)