Fetching account data from all Steem accounts from the Blockchain with beem/python

in #python2 years ago

Screenshot_2019-07-28_20-20-45.png
Image: Christina Morillo/Pexels, free

The Steem blockchain has recently crossed 1.3 Million accounts. Most of them are inactive anyway and the number of active authors is more in the order of 10k per day. However, for some analytic purposes it is sometimes required to get a snapshot of all accounts on the chain.

Getting all account data can be cumbersome and built-in methods may exceed a reasonable time frame to finish the requested operation. Here is a beem script that makes use of fetching both account names and the final account data in blocks of 1000 accounts per API call and writes them to a file.

#!/usr/bin/python
from beem import Steem
import shelve
import sys

def get_all_accounts(s, start='', stop='', steps=1e3):
    if s.rpc.get_use_appbase() and start == "":
        lastname = None
    else:
        lastname = start
    s.rpc.set_next_node_on_empty_reply(False)
    while True:
        account_names = s.rpc.lookup_accounts(lastname, steps)
        if lastname == account_names[-1]:
            raise StopIteration
        if account_names[0] == lastname:
            account_names = account_names[1:]
        lastname = account_names[-1]
        yield s.rpc.get_accounts(account_names)

accounts = []
s = Steem(node="https://api.steemit.com")
for accs in get_all_accounts(s):
    accounts.extend(accs)
    sys.stdout.write("%16s\r" % (accs[-1]['name']))

sh = shelve.open("all_accounts.shelf")
sh['accounts'] = accounts
sh.close()

The runtime depends on your internet connection and the API node, but give it at least a couple of minutes. Accounts are fetched alphabetically and the stdout printout gives a rough progress indication. The resulting file is (currently) around 1.9 GB in size and provides the option to analyze any type of account metrics offline/locally.

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