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honor min_confirmations in the UTXO service client instance (if no min_confirmations is given)

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This commit is contained in:
Jude Nelson
2017-05-09 18:28:33 -04:00
parent cb3a43ba61
commit eb5b63bc45
1 changed files with 66 additions and 28 deletions
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94
blockstack_client/backend/blockchain.py
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@@ -163,22 +163,45 @@ def is_tx_rejected(tx_hash, tx_sent_at_height, config_path=CONFIG_PATH):
return False
def get_utxos(address, config_path=CONFIG_PATH, utxo_client=None, min_confirmations=TX_MIN_CONFIRMATIONS):
def get_utxo_client_and_min_confirmations(config_path=None, utxo_client=None, min_confirmations=None):
"""
Get a utxo client and the minimum number of required confirmations
returns (utxo_client, min_confs)
"""
from ..config import get_utxo_provider_client
if utxo_client is None:
if min_confirmations is None:
min_confirmations = TX_MIN_CONFIRMATIONS
log.debug("Defaulting to {} confirmations".format(min_confirmations))
if min_confirmations != TX_MIN_CONFIRMATIONS:
log.warning("Using a different number of confirmations ({}) instead of default ({})".format(min_confirmations, TX_MIN_CONFIRMATIONS))
utxo_client = get_utxo_provider_client(config_path=config_path, min_confirmations=min_confirmations)
if min_confirmations is None:
min_confirmations = utxo_client.min_confirmations
return (utxo_client, min_confirmations)
def get_utxos(address, config_path=CONFIG_PATH, utxo_client=None, min_confirmations=None):
"""
Given an address get unspent outputs (UTXOs)
Given an address get unspent outputs (UTXOs).
If utxo_client is not None, then its min_confirmations value will be used to filter unconfirmed transactions.
Otherwise, min_confirmations will be used (at least one must be given).
Return array of UTXOs on success
Return {'error': ...} on failure
"""
from ..scripts import tx_get_unspents
from ..config import get_utxo_provider_client
if min_confirmations != TX_MIN_CONFIRMATIONS:
log.warning("Using a different number of confirmations ({}) instead of default ({})".format(min_confirmations, TX_MIN_CONFIRMATIONS))
utxo_client, min_confirmations = get_utxo_client_and_min_confirmations(config_path=config_path, utxo_client=utxo_client, min_confirmations=min_confirmations)
if utxo_client is None:
utxo_client = get_utxo_provider_client(config_path=config_path)
data = []
try:
data = tx_get_unspents( address, utxo_client )
@@ -192,7 +215,7 @@ def get_utxos(address, config_path=CONFIG_PATH, utxo_client=None, min_confirmati
ret = []
for utxo in data:
if 'confirmations' in utxo:
if int(utxo['confirmations']) >= min_confirmations:
if int(utxo['confirmations']) >= utxo_client.min_confirmations:
ret.append(utxo)
return ret
@@ -248,9 +271,13 @@ def broadcast_tx(tx_hex, config_path=CONFIG_PATH, tx_broadcaster=None):
return resp
def get_balance(address, config_path=CONFIG_PATH, utxo_client=None, min_confirmations=TX_MIN_CONFIRMATIONS):
def get_balance(address, config_path=CONFIG_PATH, utxo_client=None, min_confirmations=None):
"""
Check if BTC key being used has enough balance on unspents
Check if BTC key being used has enough balance on unspents.
If utxo_client is not None, then its min_confirmations will be used to select confirmed transactions.
Otherwise, min_confirmations will be used.
Returns value in satoshis on success
Return None on failure
"""
@@ -263,44 +290,55 @@ def get_balance(address, config_path=CONFIG_PATH, utxo_client=None, min_confirma
satoshi_amount = 0
for utxo in data:
if 'confirmations' in utxo:
if int(utxo['confirmations']) < min_confirmations:
# doesn't count
continue
if 'value' in utxo:
satoshi_amount += utxo['value']
return satoshi_amount
def is_address_usable(address, config_path=CONFIG_PATH, utxo_client=None, min_confirmations=TX_MIN_CONFIRMATIONS):
def is_address_usable(address, config_path=CONFIG_PATH, utxo_client=None, min_confirmations=None):
"""
Check if an address is usable (i.e. it has no unconfirmed transactions)
"""
try:
unspents = get_utxos(address, config_path=config_path, utxo_client=None, min_confirmations=min_confirmations)
if 'error' in unspents:
log.error("Failed to get UTXOs for %s: %s" % (address, unspents['error']))
return False
Check if an address is usable (i.e. it has no unconfirmed transactions).
except Exception as e:
Return True if the address has no unconfirmed transactions.
Return False otherwise.
"""
from ..scripts import tx_get_unspents
utxo_client, min_confirmations = get_utxo_client_and_min_confirmations(config_path=config_path, utxo_client=utxo_client, min_confirmations=min_confirmations)
if min_confirmations == 0:
# doesn't matter
log.warning("Address {} useable with zero confirmations".format(address))
return True
log.debug("Verify that address {} has no UTXOs with less than {} confirmations".format(address, min_confirmations))
data = []
try:
data = tx_get_unspents( address, utxo_client, min_confirmations=0 )
except Exception, e:
log.exception(e)
log.debug("Failed to get UTXOs for %s" % address)
return False
for unspent in unspents:
for unspent in data:
if 'confirmations' in unspent:
if int(unspent['confirmations']) < min_confirmations:
log.debug("Address {} is not usable: UTXO {},{} has {} confirmations".format(address, unspent['outpoint']['hash'], unspent['outpoint']['index'], unspent['confirmations']))
return False
log.debug("Address {}'s UTXOs all have at least {} confirmations".format(address, min_confirmations))
return True
def can_receive_name( address, proxy=None ):
"""
Can an address receive a name?
It must have no more than MAXIMUM_NAMES_PER_ADDRESS.
Return True if so
Return False if not
"""
from ..proxy import get_default_proxy
from ..proxy import get_names_owned_by_address as blockstack_get_names_owned_by_address