def get_transaction(self, txid):
url = '{api_url}/tx/{txid}?verbose=3'.format(api_url=self.url,
txid=txid)
try:
LOG.info('GET %s' % url)
r = requests.get(url)
data = r.json()
except Exception as ex:
LOG.error('Unable to get transaction %s from BTC.com: %s' %
(txid, ex))
return {
'error': 'Unable to get transaction %s from BTC.com' % txid
}
data = data['data'] if data['data'] is not None else {}
# todo check key names , test by setting testnet wrong on explorers
tx = TX()
tx.txid = txid
tx.wtxid = data['witness_hash']
tx.lock_time = data['lock_time']
tx.block_height = data[
'block_height'] if 'block_height' in data and data[
'block_height'] != -1 else None
tx.confirmations = data[
'confirmations'] if 'confirmations' in data else None
for item in data['inputs']:
tx_input = TxInput()
tx_input.address = item['prev_addresses'][0] if len(
item['prev_addresses']) > 0 else None
tx_input.value = item['prev_value']
tx_input.txid = item['prev_tx_hash']
tx_input.n = item['prev_position'] if item[
'prev_position'] is not -1 else None
tx_input.script = item['script_hex']
tx_input.sequence = item['sequence']
tx.inputs.append(tx_input)
for i, item in enumerate(data['outputs']):
tx_output = TxOutput()
tx_output.address = item['addresses'][0] if len(
item['addresses']) > 0 else None
tx_output.value = item['value']
tx_output.n = i
tx_output.spent = False if item['spent_by_tx'] is None else True
tx_output.script = item['script_hex']
if item['script_hex'][:2] == '6a':
tx_output.op_return = tx.decode_op_return(item['script_hex'])
tx.outputs.append(tx_output)
return {'transaction': tx.json_encodable()}
def get_transaction(self, txid):
url = self.url + '/tx/' + str(txid)
try:
LOG.info('GET %s' % url)
r = requests.get(url)
data = r.json()
except Exception as ex:
LOG.error('Unable to get transaction %s from %s: %s' %
(txid, self.url, ex))
return {
'error':
'Unable to get transaction %s from %s' % (txid, self.url)
}
tx = TX()
tx.txid = txid
tx.block_height = data['blockheight'] if 'blockheight' in data else None
tx.lock_time = data['locktime']
for item in data['vin']:
tx_input = TxInput()
tx_input.address = item['addr'] if 'addr' in item else None
tx_input.value = item['valueSat'] if 'valueSat' in item else 0
tx_input.txid = item['txid'] if 'txid' in item else None
tx_input.n = item['n'] if 'coinbase' not in item else None
tx_input.script = item['scriptSig'][
'hex'] if 'scriptSig' in item else None
if 'coinbase' in item:
tx_input.script = item['coinbase']
tx_input.sequence = item['sequence']
tx.inputs.append(tx_input)
for item in data['vout']:
tx_output = TxOutput()
tx_output.address = item['scriptPubKey']['addresses'][
0] if 'addresses' in item['scriptPubKey'] else None
tx_output.value = int(float(item['value']) * 1e8)
tx_output.n = item['n']
tx_output.spent = True if 'spentTxId' in item and item[
'spentTxId'] is not None else False
tx_output.script = item['scriptPubKey']['hex']
if item['scriptPubKey']['hex'][:2] == '6a':
tx_output.op_return = tx.decode_op_return(
item['scriptPubKey']['hex'])
tx.outputs.append(tx_output)
tx.confirmations = data[
'confirmations'] if 'confirmations' in data else None
return {'transaction': tx.json_encodable()}
def get_transaction(self, txid):
url = '{api_url}/rawtx/{txid}'.format(api_url=self.url, txid=txid)
try:
LOG.info('GET %s' % url)
r = requests.get(url)
data = r.json()
except Exception as ex:
LOG.error('Unable to get tx %s from Blockchain.info: %s' %
(txid, ex))
return {'error': 'Unable to get tx %s from Blockchain.info' % txid}
tx = TX()
tx.txid = txid
tx.lock_time = data['lock_time']
tx.block_height = data[
'block_height'] if 'block_height' in data else None
tx.confirmations = self.get_latest_block_height(
) - tx.block_height + 1 if tx.block_height is not None else 0
for item in data['inputs']:
tx_input = TxInput()
tx_input.address = item['prev_out'][
'addr'] if 'prev_out' in item else None
tx_input.value = item['prev_out'][
'value'] if 'prev_out' in item else 0
tx_input.n = item['prev_out']['n'] if 'prev_out' in item else None
tx_input.txid = '' # Blockchain.info does not provide the txid of a tx input only their own tx_index, can be resolved for example via https://testnet.blockchain.info/tx-index/197277768?format=json but this would require too many http requests!!!
tx_input.script = item['script']
tx_input.sequence = item['sequence']
tx.inputs.append(tx_input)
for item in data['out']:
tx_output = TxOutput()
tx_output.address = item['addr'] if 'addr' in item else None
tx_output.value = item['value']
tx_output.n = item['n']
tx_output.spent = item['spent']
tx_output.script = item['script']
if item['script'][:2] == '6a':
tx_output.op_return = tx.decode_op_return(item['script'])
tx.outputs.append(tx_output)
return {'transaction': tx.json_encodable()}
def get_transaction(self, txid):
url = '{api_url}/get_tx/{network}/{txid}'.format(api_url=self.url,
network=self.network,
txid=txid)
try:
LOG.info('GET %s' % url)
r = requests.get(url)
data = r.json()
except Exception as ex:
LOG.error('Unable to get transaction %s from Chain.so: %s' %
(txid, ex))
return {
'error': 'Unable to get transaction %s from Chain.so' % txid
}
if 'data' not in data:
LOG.error('Invalid response data from Chain.so: %s' % data)
return {'error': 'Invalid response data from Chain.so: %s' % data}
data = data['data']
tx = TX()
tx.txid = txid
block_data = self.get_block_by_hash(block_hash=data['blockhash'])
if not ('block' in block_data and 'height' in block_data['block']):
LOG.error(
'Unable to get block %s to get the block height from chain.so'
% data['blockhash'])
return {
'error':
'Unable to get block %s to get the block height from chain.so'
% data['blockhash']
}
tx.block_height = block_data['block']['height']
tx.confirmations = data['confirmations']
for item in data['inputs']:
tx_input = TxInput()
tx_input.address = item[
'address'] if item['address'] != 'coinbase' else None
tx_input.value = btc2satoshis(
btc=item['value']) if item['address'] != 'coinbase' else 0
tx_input.n = item['from_output']['output_no'] if item[
'from_output'] is not None else None
tx_input.txid = item['from_output']['txid'] if item[
'from_output'] is not None else None
tx_input.script = item['script']
tx_input.sequence = None # Chain.so does not provide the sequence
tx.inputs.append(tx_input)
for item in data['outputs']:
tx_output = TxOutput()
tx_output.address = item[
'address'] if item['address'] != 'nonstandard' else None
tx_output.value = btc2satoshis(btc=item['value'])
tx_output.n = item['output_no']
tx_output.spent = None # Chain.so does not provide information if an output has been spent already or not
tx_output.script = item['script']
if item['script'][:10] == 'OP_RETURN ':
tx_output.op_return = binascii.unhexlify(tx_output.script[10:])
# Sometimes the unhexed data is encoded in another coded than utf-8 which could cause problems when converting to json later
try:
tx_output.op_return = tx_output.op_return.decode('utf-8')
except UnicodeDecodeError:
try:
tx_output.op_return = tx_output.op_return.decode(
'cp1252')
except Exception as ex:
LOG.error(
'Unable to decode OP_RETURN data %s in utf-8 or cp1252: %s'
% (tx_output.op_return, ex))
tx_output.op_return = 'Unable to decode hex data'
tx.outputs.append(tx_output)
return {'transaction': tx.json_encodable()}