def get_number_of_transactions_for_address(self, addr):
validate.check_address_and_die(addr, THIS_FILE)
urlbuilder = BlockchainInfoURLBuilder(
self.config.BLOCKCHAIN_INFO_API_KEY)
url = urlbuilder.get_number_of_transactions_for_address(addr)
response = self.throttled_fetch_url(url)
try:
jsonObj = json.loads(response)
n_tx = jsonObj['n_tx']
if not n_tx:
#panic
msg = ("Expected 'n_tx' from JSON response but found none: "
"'%s'") % (n_tx, str(response))
logger.log_and_die(msg)
try:
int(n_tx)
except ValueError:
msg = (
"Expected integer value for 'n_tx' in JSON response but "
"found: '%s'") % (str(response))
logger.log_and_die(msg)
return n_tx
except ValueError as e:
#Something weird came back from the API despite HTTP 200 OK, panic
msg = ("Expected a JSON response for address '%s', instead "
"received '%s'") % (addr, str(response))
logger.log_and_die(msg)
def get_number_of_transactions_for_address(self, addr):
validate.check_address_and_die(addr, THIS_FILE)
urlbuilder = BlockchainInfoURLBuilder(
self.config.BLOCKCHAIN_INFO_API_KEY)
url = urlbuilder.get_number_of_transactions_for_address(addr)
response = self.throttled_fetch_url(url)
try:
jsonObj = json.loads(response)
n_tx = jsonObj['n_tx']
if not n_tx:
#panic
msg = ("Expected 'n_tx' from JSON response but found none: "
"'%s'") % (n_tx, str(response))
logger.log_and_die(msg)
try:
int(n_tx)
except ValueError:
msg = ("Expected integer value for 'n_tx' in JSON response but "
"found: '%s'") % (str(response))
logger.log_and_die(msg)
return n_tx
except ValueError as e:
#Something weird came back from the API despite HTTP 200 OK, panic
msg = ("Expected a JSON response for address '%s', instead "
"received '%s'") % (addr, str(response))
logger.log_and_die(msg)
def _does_output_have_prior_tx_history(self, addr, current_tx_id,
block_height, benchmarker=None):
"""#Helper function for `process_tx`."""
dprint("Address to be validated: %s" % addr)
validate.check_address_and_die(addr, THIS_FILE)
if self.block_reader.is_first_transaction_for_address(
addr, current_tx_id, block_height, benchmarker):
return False
else:
return True
def is_first_transaction_for_address(self,
addr,
tx_id,
block_height,
benchmarker=None):
validate.check_address_and_die(addr, THIS_FILE)
#First, check the local database cache for this address. If it's not
# there, add it to the cache as an address that has been seen, and
# then do API lookups to determine whether this tx is the address's
# first.
if self.database_connector.has_address_been_seen_cache_if_not(
addr, block_height):
if benchmarker is not None:
benchmarker.increment_blockchain_info_queries_avoided_by_caching(
)
benchmarker.increment_blockchain_info_queries_avoided_by_caching(
)
return False
n_tx = self.get_number_of_transactions_for_address(addr)
offset = int(n_tx) - 1
urlbuilder = BlockchainInfoURLBuilder(
self.config.BLOCKCHAIN_INFO_API_KEY)
url = urlbuilder.get_tx_for_address_at_offset(addr, offset)
response = self.throttled_fetch_url(url)
try:
jsonObj = json.loads(response)
tx_list = jsonObj['txs']
if not tx_list:
#address has no history
return True
if tx_list[0]:
#Check if the first tx is the tx in question
first_tx_id = tx_list[0]['hash']
if first_tx_id == tx_id:
return True
else:
return False
else:
#Something wrong, this tx list seems to be neither empty nor
# contains a first tx, panic!
msg = ("Expected zero or one transactions for address '%s'" %
addr)
logger.log_and_die(msg)
except ValueError as e:
#Something weird came back from the API despite HTTP 200 OK, panic
msg = ("Expected a JSON response for address '%s', instead "
"received '%s'") % (addr, str(response))
logger.log_and_die(msg)
def _does_output_have_prior_tx_history(self,
addr,
current_tx_id,
block_height,
benchmarker=None):
"""#Helper function for `process_tx`."""
dprint("Address to be validated: %s" % addr)
validate.check_address_and_die(addr, THIS_FILE)
if self.block_reader.is_first_transaction_for_address(
addr, current_tx_id, block_height, benchmarker):
return False
else:
return True
def is_first_transaction_for_address(self, addr, tx_id, block_height,
benchmarker = None):
validate.check_address_and_die(addr, THIS_FILE)
#First, check the local database cache for this address. If it's not
# there, add it to the cache as an address that has been seen, and
# then do API lookups to determine whether this tx is the address's
# first.
if self.database_connector.has_address_been_seen_cache_if_not(addr,
block_height):
if benchmarker is not None:
benchmarker.increment_blockchain_info_queries_avoided_by_caching()
benchmarker.increment_blockchain_info_queries_avoided_by_caching()
return False
n_tx = self.get_number_of_transactions_for_address(addr)
offset = int(n_tx) - 1
urlbuilder = BlockchainInfoURLBuilder(
self.config.BLOCKCHAIN_INFO_API_KEY)
url = urlbuilder.get_tx_for_address_at_offset(addr, offset)
response = self.throttled_fetch_url(url)
try:
jsonObj = json.loads(response)
tx_list = jsonObj['txs']
if not tx_list:
#address has no history
return True
if tx_list[0]:
#Check if the first tx is the tx in question
first_tx_id = tx_list[0]['hash']
if first_tx_id == tx_id:
return True
else:
return False
else:
#Something wrong, this tx list seems to be neither empty nor
# contains a first tx, panic!
msg = ("Expected zero or one transactions for address '%s'" %
addr)
logger.log_and_die(msg)
except ValueError as e:
#Something weird came back from the API despite HTTP 200 OK, panic
msg = ("Expected a JSON response for address '%s', instead "
"received '%s'") % (addr, str(response))
logger.log_and_die(msg)
def get_tx_for_address_at_offset(self, address, offset):
validate.check_address_and_die(address, THIS_FILE)
validate.check_int_and_die(offset, 'offset', THIS_FILE)
return ("https://blockchain.info/address/%s?format=json&offset=%d%s" %
(address, offset, self.api_key_str))
def get_tx_for_address_at_offset(self, address, offset):
validate.check_address_and_die(address, THIS_FILE)
validate.check_int_and_die(offset, 'offset', THIS_FILE)
return ("https://blockchain.info/address/%s?format=json&offset=%d%s" %
(address, offset, self.api_key_str))
