(Controversial) Lightsteem code golf #2 - Send a promotional memo to followers of your witness

^{Welcome to Lightsteem code golf series #2}

Workflow/Requirements of the evil script

---

• Get followers
• Exclude inactive followers (Last bandwidth update)
• Exclude followers using a proxy for voting
• Exclude followers already voting for you
• Exclude followers already actively voting for 30 witnesses
• Bundle 100 operations into one transaction to keep the network effect limited.

Source

---

import logging
import time
from datetime import datetime

from dateutil.parser import parse
from lightsteem.client import Client
from lightsteem.datastructures import Operation


logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)
logging.basicConfig()

WITNESS_ACCOUNT = "emrebeyler"
MEMO_TEMPLATE = "Hey {username}, I have been running a STEEM witness in the last" \
            " six months. Since you already follow me and have free slots on " \
            "your witness voting, please consider casting a witness vote for" \
            " me. (@{witness_account}). Here you can directly cast a vote: https://steemconnect.com/sign/account-witness-vote?witness=emrebeyler&approve=1"
USERLIST_FILE = "/users/emre/memo-sent.txt"
ACTIVE_KEY = "<active_key>"


def chunks(l, n):
    for i in range(0, len(l), n):
        yield l[i:i + n]


def add_to_list(username):
    with open(USERLIST_FILE, 'a+') as f:
        f.write("%s\n" % username)


def already_sent(username):
    with open(USERLIST_FILE, 'r') as f:
        for line in f.readlines():
            if username in line:
                return True
    return False


def main():
    c = Client(keys=[ACTIVE_KEY,])
    account = c.account(WITNESS_ACCOUNT)

    followers = account.followers()
    print(f"{len(followers)} follower found.")

    suitable_followers = []
    account_details_of_followers = c.get_accounts(followers)
    for follower_data in account_details_of_followers:
        follower = follower_data["name"]

        # check the follower is not dead
        last_bandwidth_update = parse(follower_data["last_bandwidth_update"])

        if (datetime.utcnow() - last_bandwidth_update).total_seconds() > 86400 * 30:
            logger.debug(f"{follower} account looks like dead. Skipping.")
            continue

        # check the follower is full on their votes.
        witness_votes = follower_data["witness_votes"]
        if len(witness_votes) == 30:
            logger.debug(f"{follower} is full. Skipping.")
            continue

        # check the follower has a proxy?
        if follower_data["proxy"]:
            logger.debug(f"{follower} has a proxy. Skipping.")
            continue

        # check the follower is already voting for me
        if WITNESS_ACCOUNT in witness_votes:
            logger.debug(
                f"{follower} is already voting for {WITNESS_ACCOUNT}. Skipping.")
            continue

        suitable_followers.append(follower)


    # handle memos
    print(f"{len(suitable_followers)} found.")

    for follower_username_list in chunks(suitable_followers, 100):
        ops = []
        for follower_username in follower_username_list:
            memo = MEMO_TEMPLATE.format(
                username=follower_username,
                witness_account=WITNESS_ACCOUNT
            )

            if already_sent(follower_username):
                logger.info(f"{follower_username} already got a memo. Skipping")
                continue

            ops.append(
                Operation('transfer', {
                    'from': WITNESS_ACCOUNT,
                    'to': follower_username,
                    'amount': '0.001 SBD',
                    'memo': memo
                })
            )

            add_to_list(follower_username)
        if len(ops):
            c.broadcast(ops)
            time.sleep(3)

if __name__ == '__main__':
    main()