def query_btc_account_balance(account: BTCAddress) -> FVal:
"""Queries blockchain.info for the balance of account
May raise:
- RemotError if there is a problem querying blockchain.info or blockcypher
"""
try:
if account.lower()[0:3] == 'bc1':
url = f'https://api.blockcypher.com/v1/btc/main/addrs/{account.lower()}/balance'
response_data = request_get(url=url)
if 'balance' not in response_data:
raise RemoteError(f'Unexpected blockcypher balance response: {response_data}')
btc_resp = response_data['balance']
else:
btc_resp = request_get_direct(
url='https://blockchain.info/q/addressbalance/%s' % account,
handle_429=True,
# If we get a 429 then their docs suggest 10 seconds
# https://blockchain.info/q
backoff_in_seconds=10,
)
except (requests.exceptions.ConnectionError, UnableToDecryptRemoteData) as e:
raise RemoteError(f'bitcoin external API request failed due to {str(e)}')
return satoshis_to_btc(FVal(btc_resp)) # result is in satoshis
def _check_blockcypher_for_transactions(
accounts: List[BTCAddress], ) -> Dict[BTCAddress, Tuple[bool, FVal]]:
have_transactions = {}
new_accounts = _prepare_blockcypher_accounts(accounts)
# blockcypher's batching takes up as many api queries as the batch,
# and the api rate limit is 3 requests per second. So we should make
# sure each batch is of max size 3
# https://www.blockcypher.com/dev/bitcoin/#batching
batches = [new_accounts[x:x + 3] for x in range(0, len(new_accounts), 3)]
total_idx = 0
for batch in batches:
params = ';'.join(batch)
url = f'https://api.blockcypher.com/v1/btc/main/addrs/{params}/balance'
response_data = request_get(url=url,
handle_429=True,
backoff_in_seconds=4)
if isinstance(response_data, dict):
# If only one account was requested put it in a list so the
# rest of the code works
response_data = [response_data]
for idx, entry in enumerate(response_data):
balance = satoshis_to_btc(FVal(entry['final_balance']))
# we don't use the returned address as it may be lowercased
have_transactions[accounts[total_idx +
idx]] = (entry['final_n_tx'] != 0,
balance)
total_idx += len(batch)
return have_transactions
def query_btc_accounts_balances(
accounts: List[BTCAddress]) -> Dict[BTCAddress, FVal]:
"""Queries blockchain.info for the balance of account
May raise:
- RemotError if there is a problem querying blockchain.info or blockcypher
"""
source = 'blockchain.info'
balances = {}
try:
if any(account.lower()[0:3] == 'bc1' for account in accounts):
# if 1 account is bech32 we have to query blockcypher. blockchaininfo won't work
source = 'blockcypher.com'
# the bech32 accounts have to be given lowercase to the
# blockcypher query. No idea why.
new_accounts = []
for x in accounts:
lowered = x.lower()
if lowered[0:3] == 'bc1':
new_accounts.append(lowered)
else:
new_accounts.append(x)
# blockcypher's batching takes up as many api queries as the batch,
# and the api rate limit is 3 requests per second. So we should make
# sure each batch is of max size 3
# https://www.blockcypher.com/dev/bitcoin/#batching
batches = [
new_accounts[x:x + 3]
for x in range(0, len(new_accounts), 3)
]
total_idx = 0
for batch in batches:
params = ';'.join(batch)
url = f'https://api.blockcypher.com/v1/btc/main/addrs/{params}/balance'
response_data = request_get(url=url,
handle_429=True,
backoff_in_seconds=4)
if isinstance(response_data, dict):
# If only one account was requested put it in a list so the
# rest of the code works
response_data = [response_data]
for idx, entry in enumerate(response_data):
# we don't use the returned address as it may be lowercased
balances[accounts[total_idx + idx]] = satoshis_to_btc(
FVal(entry['final_balance']), )
total_idx += len(batch)
else:
params = '|'.join(accounts)
btc_resp = request_get_dict(
url=f'https://blockchain.info/multiaddr?active={params}',
handle_429=True,
# If we get a 429 then their docs suggest 10 seconds
# https://blockchain.info/q
backoff_in_seconds=10,
)
for idx, entry in enumerate(btc_resp['addresses']):
balances[accounts[idx]] = satoshis_to_btc(
FVal(entry['final_balance']))
except (requests.exceptions.ConnectionError,
UnableToDecryptRemoteData) as e:
raise RemoteError(
f'bitcoin external API request failed due to {str(e)}')
except KeyError as e:
raise RemoteError(
f'Malformed response when querying bitcoin blockchain via {source}.'
f'Did not find key {e}', )
return balances