calculate_fair_tx_fee.py

#!/usr/bin/python3

"""Calculate 'fair' market tx fee based on blockchain throughput.

Note:
    it's just a ballpark estimate, real market prices will differ, doing this is better then nothing )(

Parses average number of txs per hour from https://minaexplorer.com/stats,
parses total stake for all accounts from https://minaexplorer.com/ledger,
provides an educated guess of what tx fee should be based on current throughput and stake sum.
"""

import requests
from bs4 import BeautifulSoup

IGNORE_DEFAULT_STAKE_ACCOUNTS = True  # assume this accounts ignore tx challenge
IGNORE_ZERO_NONCE_ACCOUNTS = False  # just for testing purposes, ignores accounts with nonce = 0
HOURS_TILL_THE_END_OF_CHALLENGE = 9 * 24

# parse addresses from minaexplorer
page_source_raw = requests.get('https://minaexplorer.com/ledger')
page_source = page_source_raw.content.decode()
soup = BeautifulSoup(page_source, 'html.parser')
addresses_raw_list = soup.select('#ledgerTable > tbody > tr')
# remove accounts from o1 labs
addresses_raw_final = [address for address in addresses_raw_list if 'O(1)' not in address.text]

# parse stake and nonce from soup
parsed_list = []
for address in addresses_raw_final:
    stake = int(float(address.select('td')[2].text))
    nonce = int(address.select('td')[3].text)
    parsed_list.append({'stake': stake, 'nonce': nonce})

# find sum of stake in all accounts, will be used in ballpark estimate to find price per tx
sum_of_all_stakes = 0
for address in parsed_list:
    if address['stake'] == 66000 and IGNORE_DEFAULT_STAKE_ACCOUNTS:
        # ignore accounts with started stake value, assume this accounts ignore tx challenge
        continue
    elif address['nonce'] == 0 and IGNORE_ZERO_NONCE_ACCOUNTS:
        # ignore accounts with nonce zero, assume this accounts ignore tx challenge
        continue
    sum_of_all_stakes += int(address['stake'])

# parse average throughput for mina blockchain for past 48 hours
tx_per_hour_history = requests.get(
    'https://us-east-1.aws.webhooks.mongodb-realm.com/api/client/v2.0/app/charts-project-0-fpdae/service/http/incoming_webhook/embedding?tolerance=3600&id=8f94f199-abb7-4938-893b-5681ab4872d0&tenant=d9d50e76-b3ef-43bb-b33b-bb739d4125e7&attribution=false'  # noqa: E501
)
last_48_hours_txs = [int(tx['y']['$numberInt']) for tx in tx_per_hour_history.json()['data']['documents'][-48:]]
last_48_average_throughput = int(sum(last_48_hours_txs) / len(last_48_hours_txs))
possible_tx_number_till_the_end_of_challenge = HOURS_TILL_THE_END_OF_CHALLENGE * last_48_average_throughput

print(
    f'average throughput for mina blockchain in last 48 hours is: {last_48_average_throughput}, till the end of 2nd epoch: {possible_tx_number_till_the_end_of_challenge}'  # noqa: E501
)
# do a price discovery to be able to use all funds on tx sending
print(f'tx price should be: {int(sum_of_all_stakes / possible_tx_number_till_the_end_of_challenge)}')