def test_sweep(self):
cmds = MocCommands()
cmds.wallet.add_address_transaction(120000)
cmds.wallet.add_address_transaction(120000)
unspent = []
for tx in cmds.wallet.transactions.values():
for output in tx._outputs:
unspent.append((tx.hash(), output))
cmds.network = MocNetwork({
'blockchain.address.listunspent': lambda _: [{
'tx_hash': tx_hash,
'tx_pos': 1,
'address': address,
'coinbase': False,
'height': 2,
'is_claim': False,
'is_support': False,
'is_update': False,
'prevout_hash': 'df303881e9014cce89c7acf55b124372e22979284baa99bb9fa178a9d35c97cb',
'prevout_n': 0,
'value': amount
} for (tx_hash, (type, address, amount)) in unspent]
})
destination = cmds.wallet.create_new_address()
result = cmds.sweep(self.private_key, destination)
self.assertEqual(True, result['success'])
sent = Transaction(result['tx'])
sent.deserialize()
self.assertEqual(len(sent._outputs), 1)
self.assertEqual(sent._outputs[0][2], 230000)
def test_sweep(self):
cmds = MocCommands()
cmds.wallet.add_address_transaction(120000)
cmds.wallet.add_address_transaction(120000)
unspent = []
for tx in cmds.wallet.transactions.values():
for output in tx._outputs:
unspent.append((tx.hash(), output))
cmds.network = MocNetwork({
'blockchain.address.listunspent':
lambda _: [{
'tx_hash': tx_hash,
'tx_pos': 1,
'address': address,
'coinbase': False,
'height': 2,
'is_claim': False,
'is_support': False,
'is_update': False,
'prevout_hash':
'df303881e9014cce89c7acf55b124372e22979284baa99bb9fa178a9d35c97cb',
'prevout_n': 0,
'value': amount
} for (tx_hash, (type, address, amount)) in unspent]
})
destination = cmds.wallet.create_new_address()
result = cmds.sweep(self.private_key, destination)
self.assertEqual(True, result['success'])
sent = Transaction(result['tx'])
sent.deserialize()
self.assertEqual(len(sent._outputs), 1)
self.assertEqual(sent._outputs[0][2], 230000)
def _get_decoded_tx(self, raw_tx):
tx = Transaction(raw_tx)
decoded_tx = {}
decoded_tx['vout'] = []
for output in tx.outputs():
out = {}
out['value'] = Decimal(output[2]) / Decimal(COIN)
decoded_tx['vout'].append(out)
return decoded_tx
def make_tx(self,
coins,
outputs,
change_addrs,
fee_estimator,
dust_threshold,
abandon_txid=None):
'''Select unspent coins to spend to pay outputs. If the change is
greater than dust_threshold (after adding the change output to
the transaction) it is kept, otherwise none is sent and it is
added to the transaction fee.'''
# Deterministic randomness from coins
utxos = [c['prevout_hash'] + str(c['prevout_n']) for c in coins]
self.p = PRNG(''.join(sorted(utxos)))
# Copy the ouputs so when adding change we don't modify "outputs"
tx = Transaction.from_io([], outputs[:])
# Size of the transaction with no inputs and no change
base_size = tx.estimated_size()
spent_amount = tx.output_value()
claim_coin = None
if abandon_txid is not None:
claim_coins = [coin for coin in coins if coin['is_claim']]
assert len(claim_coins) >= 1
claim_coin = claim_coins[0]
spent_amount -= claim_coin['value']
coins = [coin for coin in coins if not coin['is_claim']]
def sufficient_funds(buckets):
'''Given a list of buckets, return True if it has enough
value to pay for the transaction'''
total_input = sum(bucket.value for bucket in buckets)
total_size = sum(bucket.size for bucket in buckets) + base_size
return total_input >= spent_amount + fee_estimator(total_size)
# Collect the coins into buckets, choose a subset of the buckets
buckets = self.bucketize_coins(coins)
buckets = self.choose_buckets(buckets, sufficient_funds,
self.penalty_func(tx))
if claim_coin is not None:
tx.add_inputs([claim_coin])
tx.add_inputs([coin for b in buckets for coin in b.coins])
tx_size = base_size + sum(bucket.size for bucket in buckets)
# This takes a count of change outputs and returns a tx fee;
# each pay-to-bitcoin-address output serializes as 34 bytes
def fee(count):
return fee_estimator(tx_size + count * 34)
change = self.change_outputs(tx, change_addrs, fee, dust_threshold)
tx.add_outputs(change)
log.debug("using %i inputs", len(tx.inputs()))
log.info("using buckets: %s", [bucket.desc for bucket in buckets])
return tx
def _decode(raw_tx):
tx = Transaction(raw_tx).deserialize()
decoded_tx = {}
for txkey in tx.keys():
if isinstance(tx[txkey], list):
decoded_tx[txkey] = []
for i in tx[txkey]:
tmp = {}
for k in i.keys():
if isinstance(i[k], Decimal):
tmp[k] = float(i[k] / 1e8)
else:
tmp[k] = i[k]
decoded_tx[txkey].append(tmp)
else:
decoded_tx[txkey] = tx[txkey]
return decoded_tx
def get_input_tx(self, tx_hash):
# First look up an input transaction in the wallet where it
# will likely be. If co-signing a transaction it may not have
# all the input txs, in which case we ask the network.
tx = self.transactions.get(tx_hash)
if not tx:
request = ('blockchain.transaction.get', [tx_hash])
# FIXME: what if offline?
tx = Transaction(self.network.synchronous_get(request))
return tx
def tx_response(self, response):
params, result = self.parse_response(response)
if not params:
return
tx_hash, tx_height = params
assert tx_hash == hash_encode(Hash(result.decode('hex')))
tx = Transaction(result)
try:
tx.deserialize()
except Exception:
log.info("cannot deserialize transaction, skipping: %s", tx_hash)
return
self.wallet.receive_tx_callback(tx_hash, tx, tx_height)
self.requested_tx.remove((tx_hash, tx_height))
log.info("received tx %s height: %d bytes: %d", tx_hash, tx_height, len(tx.raw))
# callbacks
self.network.trigger_callback('new_transaction', tx)
if not self.requested_tx:
self.network.trigger_callback('updated')
def make_tx(self, coins, outputs, change_addrs, fee_estimator,
dust_threshold, abandon_txid=None):
'''Select unspent coins to spend to pay outputs. If the change is
greater than dust_threshold (after adding the change output to
the transaction) it is kept, otherwise none is sent and it is
added to the transaction fee.'''
# Deterministic randomness from coins
utxos = [c['prevout_hash'] + str(c['prevout_n']) for c in coins]
self.p = PRNG(''.join(sorted(utxos)))
# Copy the ouputs so when adding change we don't modify "outputs"
tx = Transaction.from_io([], outputs[:])
# Size of the transaction with no inputs and no change
base_size = tx.estimated_size()
spent_amount = tx.output_value()
claim_coin = None
if abandon_txid is not None:
claim_coins = [coin for coin in coins if coin['is_claim']]
assert len(claim_coins) >= 1
claim_coin = claim_coins[0]
spent_amount -= claim_coin['value']
coins = [coin for coin in coins if not coin['is_claim']]
def sufficient_funds(buckets):
'''Given a list of buckets, return True if it has enough
value to pay for the transaction'''
total_input = sum(bucket.value for bucket in buckets)
total_size = sum(bucket.size for bucket in buckets) + base_size
return total_input >= spent_amount + fee_estimator(total_size)
# Collect the coins into buckets, choose a subset of the buckets
buckets = self.bucketize_coins(coins)
buckets = self.choose_buckets(buckets, sufficient_funds,
self.penalty_func(tx))
if claim_coin is not None:
tx.add_inputs([claim_coin])
tx.add_inputs([coin for b in buckets for coin in b.coins])
tx_size = base_size + sum(bucket.size for bucket in buckets)
# This takes a count of change outputs and returns a tx fee;
# each pay-to-bitcoin-address output serializes as 34 bytes
def fee(count):
return fee_estimator(tx_size + count * 34)
change = self.change_outputs(tx, change_addrs, fee, dust_threshold)
tx.add_outputs(change)
log.debug("using %i inputs", len(tx.inputs()))
log.info("using buckets: %s", [bucket.desc for bucket in buckets])
return tx
def tx_response(response):
params, result = self.parse_response(response)
if not params:
log.warning("failed to get %s", txid)
self.requested_tx.remove((txid, height))
return
tx_hash, tx_height = params
assert tx_hash == hash_encode(Hash(result.decode('hex')))
tx = Transaction(result)
try:
tx.deserialize()
except Exception:
log.info("cannot deserialize transaction, skipping: %s", tx_hash)
return
self.wallet.receive_tx_callback(tx_hash, tx, tx_height)
self.requested_tx.remove((tx_hash, tx_height))
log.info("received tx %s height: %d bytes: %d", tx_hash, tx_height, len(tx.raw))
# callbacks
self.network.trigger_callback('new_transaction', tx)
if not self.requested_tx:
self.network.trigger_callback('updated')
def make_Bucket(desc, coins):
size = sum(Transaction.estimated_input_size(coin)
for coin in coins)
value = sum(coin['value'] for coin in coins)
return Bucket(desc, size, value, coins)
def pubkeys_to_address(self, pubkeys):
redeem_script = Transaction.multisig_script(sorted(pubkeys), self.m)
address = hash_160_bytes_to_address(hash_160(redeem_script.decode('hex')), 5)
return address
def redeem_script(self, for_change, n):
pubkeys = self.get_pubkeys(for_change, n)
return Transaction.multisig_script(sorted(pubkeys), self.m)
def make_Bucket(desc, coins):
size = sum(
Transaction.estimated_input_size(coin) for coin in coins)
value = sum(coin['value'] for coin in coins)
return Bucket(desc, size, value, coins)
def main(self):
add_menu()
welcome = 'Use the menu to scan a transaction.'
droid.fullShow(qr_layout(welcome))
while True:
event = droid.eventWait().result
if not event:
continue
elif event["name"] == "key":
if event["data"]["key"] == '4':
if self.qr_data:
self.show_qr(None)
self.show_title(welcome)
else:
break
elif event["name"] == "seed":
password = self.get_password()
if password is False:
modal_dialog('Error','incorrect password')
continue
seed = wallet.get_mnemonic(password)
modal_dialog('Your seed is', seed)
elif event["name"] == "password":
self.change_password_dialog()
elif event["name"] == "xpub":
mpk = wallet.get_master_public_key()
self.show_qr(mpk)
self.show_title('master public key')
droid.setClipboard(mpk)
droid.makeToast("Master public key copied to clipboard")
elif event["name"] == "scan":
r = droid.scanBarcode()
r = r.result
if not r:
continue
data = r['extras']['SCAN_RESULT']
data = base_decode(data.encode('utf8'), None, base=43)
data = ''.join(chr(ord(b)) for b in data).encode('hex')
tx = Transaction(data)
#except:
# modal_dialog('Error', 'Cannot parse transaction')
# continue
if not wallet.can_sign(tx):
modal_dialog('Error', 'Cannot sign this transaction')
continue
lines = map(lambda x: x[0] + u'\t\t' + format_satoshis(x[1]) if x[1] else x[0], tx.get_outputs())
if not modal_question('Sign?', '\n'.join(lines)):
continue
password = self.get_password()
if password is False:
modal_dialog('Error','incorrect password')
continue
droid.dialogCreateSpinnerProgress("Signing")
droid.dialogShow()
wallet.sign_transaction(tx, password)
droid.dialogDismiss()
data = base_encode(str(tx).decode('hex'), base=43)
self.show_qr(data)
self.show_title('Signed Transaction')
droid.makeToast("Bye!")
def pubkeys_to_address(self, pubkeys):
redeem_script = Transaction.multisig_script(sorted(pubkeys), self.m)
address = hash_160_to_bc_address(hash_160(redeem_script.decode('hex')),
5)
return address
def redeem_script(self, for_change, n):
pubkeys = self.get_pubkeys(for_change, n)
return Transaction.multisig_script(sorted(pubkeys), self.m)
