wls-transactionbuilder.py

# https://steemit.com/beem/@holger80/how-to-use-beem-for-offline-trx-building-and-signing
import json

import requests
from beem.steem import Steem
from beem.transactionbuilder import TransactionBuilder
from beembase import operations
from beembase.transactions import getBlockParams

# Account config
account = 'jpphotography'
wlspostingkey = ''

# Node config
wlsnode = 'https://pubrpc.whaleshares.io/'

# Post config
permlink = 'testing-for-steem2wls'
title = 'Testing'
body = 'Please ignore this'
parent_author = ''
parent_permlink = 'test'

if __name__ == '__main__':
    wls = Steem(node=wlsnode, nobroadcast=True, prefix='WLS')

    ref_block_num, ref_block_prefix = getBlockParams(wls)

    comment = {'title': title, 'body': body, 'author': account, 'permlink': permlink,
               'parent_author': parent_author, 'parent_permlink': parent_permlink}

    op = operations.Comment(comment)

    # Build and sign transaction
    tb = TransactionBuilder(steem_instance=wls, expiration=3600)
    tb.appendOps([op])
    tb.appendWif(wlspostingkey)
    tb.constructTx(ref_block_num=ref_block_num,
                   ref_block_prefix=ref_block_prefix)
    tx = tb.sign(reconstruct_tx=False)

    # Build transaction in new Whaleshares format
    params = (tx.json())
    ref_block_num = params.get('ref_block_num')
    ref_block_prefix = params.get('ref_block_prefix')
    expiration = params.get('expiration')
    signatures = params.get('signatures')
    operations = ['social_action', {
        'account': account, 'action': [0, comment]}]
    callparams = ['network_broadcast_api', 'broadcast_transaction_synchronous', [
        {'ref_block_num': ref_block_num, 'ref_block_prefix': ref_block_prefix, 'expiration': expiration, 'operations': [operations], 'extensions':[], 'signatures':signatures}]]
    broadcast_json = {
        'jsonrpc': '2.0', 'method': 'call', 'params': callparams, 'id': 2}

    # Broadcast transaction
    req = requests.post(wlsnode, data=json.dumps(broadcast_json))

    # Print response
    print(req.text)