# -*- coding: utf-8 -*-
#
# BitcoinLib - Python Cryptocurrency Library
# Blocksmurfer client
# © 2020 Januari - 1200 Web Development <http://1200wd.com/>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import logging
from datetime import datetime
from bitcoinlib.main import MAX_TRANSACTIONS
from bitcoinlib.services.baseclient import BaseClient, ClientError
from bitcoinlib.transactions import Transaction
PROVIDERNAME = 'blocksmurfer'
_logger = logging.getLogger(__name__)
[docs]
class BlocksmurferClient(BaseClient):
def __init__(self, network, base_url, denominator, *args):
super(self.__class__, self).__init__(network, PROVIDERNAME, base_url, denominator, *args)
[docs]
def compose_request(self, function, parameter='', parameter2='', variables=None, post_data='', method='get'):
url_path = function
if parameter:
url_path += '/' + str(parameter)
if parameter2:
url_path += '/' + str(parameter2)
if variables is None:
variables = {}
if self.api_key:
variables.update({'token': self.api_key})
return self.request(url_path, variables, method, post_data=post_data)
[docs]
def getbalance(self, addresslist):
balance = 0
for address in addresslist:
res = self.compose_request('address_balance', address)
balance += res['balance']
return balance
# TODO: fix blocksmurfer api
[docs]
def getutxos(self, address, after_txid='', limit=MAX_TRANSACTIONS):
res = self.compose_request('utxos', address, variables={'after_txid': after_txid})
self.latest_block = self.blockcount() if not self.latest_block else self.latest_block
utxos = []
for u in res:
block_height = None if not u['block_height'] else u['block_height']
confirmations = u['confirmations']
if block_height and not confirmations:
confirmations = self.latest_block - block_height
utxos.append({
'address': address,
'txid': u['txid'],
'confirmations': confirmations,
'output_n': u['output_n'],
'input_n': u['input_n'],
'block_height': block_height,
'fee': u['fee'],
'size': u['size'],
'value': u['value'],
'script': u['script'],
'date': datetime.strptime(u['date'][:19], "%Y-%m-%dT%H:%M:%S")
})
return utxos[:limit]
def _parse_transaction(self, tx, block_height=None):
block_height = block_height if not tx['block_height'] else tx['block_height']
confirmations = tx['confirmations']
if block_height and not confirmations and tx['status'] == 'confirmed':
self.latest_block = self.blockcount() if not self.latest_block else self.latest_block
confirmations = self.latest_block - block_height
# FIXME: Blocksmurfer returns 'date' or 'time', should be consistent
tx_date = None if not tx.get('date') else datetime.strptime(tx['date'], "%Y-%m-%dT%H:%M:%S")
if not tx_date and 'time' in tx:
tx_date = datetime.utcfromtimestamp(tx['time'])
t = Transaction(locktime=tx['locktime'], version=tx['version'], network=self.network,
fee=tx['fee'], size=tx['size'], txid=tx['txid'], date=tx_date, input_total=tx['input_total'],
output_total=tx['output_total'], confirmations=confirmations, block_height=block_height,
status=tx['status'], coinbase=tx['coinbase'], rawtx=bytes.fromhex(tx['raw_hex']),
witness_type=tx['witness_type'])
for ti in tx['inputs']:
t.add_input(prev_txid=ti['prev_txid'], output_n=ti['output_n'], keys=ti.get('keys', []),
index_n=ti['index_n'], unlocking_script=ti['script'], value=ti['value'],
public_hash=bytes.fromhex(ti['public_hash']), address=ti['address'],
witness_type=ti['witness_type'], locktime_cltv=ti['locktime_cltv'],
locktime_csv=ti['locktime_csv'], signatures=ti['signatures'], compressed=ti['compressed'],
encoding=ti['encoding'], unlocking_script_unsigned=ti['script_code'],
sigs_required=ti['sigs_required'], sequence=ti['sequence'],
witnesses=[bytes.fromhex(w) for w in ti['witnesses']], script_type=ti['script_type'],
strict=self.strict)
for to in tx['outputs']:
t.add_output(value=to['value'], address=to['address'], public_hash=to['public_hash'],
lock_script=to['script'], spent=to['spent'], strict=self.strict)
t.update_totals()
return t
[docs]
def gettransaction(self, txid, block_count=None):
tx = self.compose_request('transaction', txid)
return self._parse_transaction(tx, block_count)
[docs]
def gettransactions(self, address, after_txid='', limit=MAX_TRANSACTIONS):
prtxs = []
while True:
txs = self.compose_request('transactions', address, variables={'after_txid': after_txid})
prtxs += txs
if not txs or len(txs) < limit:
break
after_txid = txs[-1:][0]['txid']
txs = []
for tx in prtxs:
t = self._parse_transaction(tx)
if t:
txs.append(t)
return txs[:limit]
[docs]
def getrawtransaction(self, txid):
tx = self.compose_request('transaction', txid, variables={'raw': True})
return tx['raw_hex']
[docs]
def sendrawtransaction(self, rawtx):
res = self.compose_request('transaction_broadcast', post_data=rawtx, method='post')
return {
'txid': res['txid'],
'response_dict': res
}
[docs]
def estimatefee(self, blocks):
variables = {
'blocks': str(blocks)
}
res = self.compose_request('fees', variables=variables)
return res['estimated_fee_sat_kb']
[docs]
def blockcount(self):
return self.compose_request('blockcount')['blockcount']
[docs]
def mempool(self, txid):
if txid:
t = self.gettransaction(txid)
if t and not t.confirmations:
return [t.txid]
# else:
# return self.compose_request('mempool', 'txids')
return []
[docs]
def getblock(self, blockid, parse_transactions, page, limit):
variables = {'parse_transactions': parse_transactions, 'page': page, 'limit': limit}
bd = self.compose_request('block', str(blockid), variables=variables)
txs = []
if parse_transactions and bd['transactions'] and isinstance(bd['transactions'][0], dict):
self.latest_block = self.blockcount() if not self.latest_block else self.latest_block
for tx in bd['transactions']:
tx['confirmations'] = bd['depth']
tx['time'] = bd['time']
tx['block_height'] = bd['height']
tx['block_hash'] = bd['block_hash']
t = self._parse_transaction(tx, self.latest_block)
if t.txid != tx['txid']:
raise ClientError("Could not parse tx %s. Different txid's" % (tx['txid']))
txs.append(t)
else:
txs = bd['transactions']
block = {
'bits': bd['bits'],
'depth': bd['depth'],
'block_hash': bd['block_hash'],
'height': bd['height'],
'merkle_root': bd['merkle_root'],
'nonce': bd['nonce'],
'prev_block': bd['prev_block'],
'time': bd['time'],
'tx_count': bd['tx_count'],
'txs': txs,
'version': bd['version'],
'page': page,
'pages': None if not limit else int(bd['tx_count'] // limit) + (bd['tx_count'] % limit > 0),
'limit': limit
}
return block
[docs]
def getrawblock(self, blockid):
res = self.compose_request('rawblock', blockid)
return res
[docs]
def isspent(self, txid, output_n):
res = self.compose_request('isspent', txid, str(output_n))
return 1 if res['spent'] else 0
[docs]
def getinfo(self):
res = self.compose_request('')
info = {k: v for k, v in res.items() if k in ['chain', 'blockcount', 'hashrate', 'mempool_size',
'difficulty']}
return info