def withdrawfromvault(self, fromvaultaddress, toaddress, amount):
vault = self.getvault(fromvaultaddress)
received = self.chaindb.listreceivedbyvault(fromvaultaddress)
received = received.values()[0]
if received['value'] < amount + 2 * utils.calculate_fees(None):
self.logger.warning("Insufficient funds in vault, exiting, return")
return
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(toaddress)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
# calculate nValueIn
nValueIn = received['value']
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = 2 * utils.calculate_fees(tx)
# create change transaction, if there is any change left
if excessAmount > fees:
change_txout = CTxOut()
change_txout.nValue = excessAmount - fees
account = self.getaccount()
changeaddress = fromvaultaddress
self.logger.debug("Change address: %s" % changeaddress)
change_txout.scriptPubKey = \
utils.vault_address_to_pay_to_vault_script(changeaddress)
tx.vout.append(change_txout)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
key = CKey()
key.set_pubkey(vault['public_key'])
key.set_privkey(vault['private_key'])
signature = key.sign(txhash)
vaultscript = utils.create_vault_script(vault['address'], \
vault['master_address'], vault['timeout'], vault['maxfees'])
scriptSig = chr(OP_VAULT_WITHDRAW) + chr(len(signature)) + signature + \
chr(len(vaultscript)) + vaultscript
self.logger.debug("Adding signature: %s" % binascii.hexlify(scriptSig))
txin.scriptSig = scriptSig
return tx
def withdrawfromvault(self, fromvaultaddress, toaddress, amount):
vault = self.getvault(fromvaultaddress)
received = self.chaindb.listreceivedbyvault(fromvaultaddress)
received = received.values()[0]
if received['value'] < amount + 2 * utils.calculate_fees(None):
self.logger.warning("Insufficient funds in vault, exiting, return")
return
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(toaddress)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
# calculate nValueIn
nValueIn = received['value']
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = 2 * utils.calculate_fees(tx)
# create change transaction, if there is any change left
if excessAmount > fees:
change_txout = CTxOut()
change_txout.nValue = excessAmount - fees
account = self.getaccount()
changeaddress = fromvaultaddress
self.logger.debug("Change address: %s" % changeaddress)
change_txout.scriptPubKey = \
utils.vault_address_to_pay_to_vault_script(changeaddress)
tx.vout.append(change_txout)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
key = CKey()
key.set_pubkey(vault['public_key'])
key.set_privkey(vault['private_key'])
signature = key.sign(txhash)
vaultscript = utils.create_vault_script(vault['address'], \
vault['master_address'], vault['timeout'], vault['maxfees'])
scriptSig = chr(OP_VAULT_WITHDRAW) + chr(len(signature)) + signature + \
chr(len(vaultscript)) + vaultscript
self.logger.debug("Adding signature: %s" % binascii.hexlify(scriptSig))
txin.scriptSig = scriptSig
return tx
def overridevaulttx(self, fromvaultaddress, toaddress):
vault = self.getvault(fromvaultaddress)
# select the input addresses
received = self.chaindb.listallreceivedbyvault(fromvaultaddress)
if not received:
self.logger.warning("Empty vault, exiting, return")
return None, None
received = received.values()[0]
if received['value'] < 2 * utils.calculate_fees(None):
self.logger.warning("Insufficient funds in vault, exiting, return")
return None, None
# calculate remaining amount
amount = received['value'] - 2 * utils.calculate_fees(None)
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(toaddress)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
# calculate nValueIn
nValueIn = received['value']
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = utils.calculate_fees(tx)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
key = CKey()
key.set_pubkey(vault['public_key'])
key.set_privkey(vault['private_key'])
signature = key.sign(txhash)
# get the script
vaultscript = utils.create_vault_script(vault['address'], \
vault['master_address'], vault['timeout'], vault['maxfees'])
scriptSig = chr(OP_VAULT_OVERRIDE) + chr(len(vault['master_public_key'])) + \
vault['master_public_key'] + chr(len(signature)) + signature + \
chr(len(vaultscript)) + vaultscript
self.logger.debug("Adding signature: %s" % binascii.hexlify(scriptSig))
txin.scriptSig = scriptSig
return amount, tx
def overridevaulttx(self, fromvaultaddress, toaddress):
vault = self.getvault(fromvaultaddress)
# select the input addresses
received = self.chaindb.listallreceivedbyvault(fromvaultaddress)
if not received:
self.logger.warning("Empty vault, exiting, return")
return None, None
received = received.values()[0]
if received['value'] < 2 * utils.calculate_fees(None):
self.logger.warning("Insufficient funds in vault, exiting, return")
return None, None
# calculate remaining amount
amount = received['value'] - 2 * utils.calculate_fees(None)
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(toaddress)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
# calculate nValueIn
nValueIn = received['value']
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = utils.calculate_fees(tx)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
key = CKey()
key.set_pubkey(vault['public_key'])
key.set_privkey(vault['private_key'])
signature = key.sign(txhash)
# get the script
vaultscript = utils.create_vault_script(vault['address'], \
vault['master_address'], vault['timeout'], vault['maxfees'])
scriptSig = chr(OP_VAULT_OVERRIDE) + chr(len(vault['master_public_key'])) + \
vault['master_public_key'] + chr(len(signature)) + signature + \
chr(len(vaultscript)) + vaultscript
self.logger.debug("Adding signature: %s" % binascii.hexlify(scriptSig))
txin.scriptSig = scriptSig
return amount, tx
def sign(jsonbuf, privkey, role, extra_keys=[]):
'''
:type jsonbuf: str.
:param privkey: private key in DER form
:type privkey: str.
:type role: str.
:type extra_keys: list.
:returns: dict - JSON with signature appended.
:raises: BadJSONError
'''
jsondoc = json.loads(jsonbuf)
signed_keys = jsondoc.get('signed_keys', [])
sigdict = {}
for key in signed_keys + extra_keys:
# FIXME:в ключе допустимы только [a-zA-Z0-9_.\-]
# FIXME:можно исключить числа с плавающей точкой
value = jsondoc.get(key, None)
if not value:
raise BadJSONError('Missing attribute: %s' % (repr(key), ))
sigdict[key] = value
if not len(sigdict):
raise BadJSONError('No attributes to sign')
instr = json.dumps(sigdict, separators=(',', ':'), sort_keys=True)
hash = hashlib.sha256(hashlib.sha256(instr).digest()).digest()
ckey = CKey()
ckey.set_privkey(privkey)
signed = ckey.sign(hash)
sigentry = {
'role': role,
'signature_type': 'secp256k1',
'pubkey': binascii.hexlify(ckey.get_pubkey()),
'signature': binascii.hexlify(signed)
}
if extra_keys:
sigentry['extra_signed_keys'] = extra_keys
jsondoc.setdefault('signatures', []).append(sigentry)
return jsondoc
def sign(jsonbuf, privkey, role, extra_keys=[]):
'''
:type jsonbuf: str.
:param privkey: private key in DER form
:type privkey: str.
:type role: str.
:type extra_keys: list.
:returns: dict - JSON with signature appended.
:raises: BadJSONError
'''
jsondoc = json.loads(jsonbuf)
signed_keys = jsondoc.get('signed_keys', [])
sigdict = {}
for key in signed_keys + extra_keys:
# FIXME:в ключе допустимы только [a-zA-Z0-9_.\-]
# FIXME:можно исключить числа с плавающей точкой
value = jsondoc.get(key, None)
if not value:
raise BadJSONError('Missing attribute: %s' % (repr(key),))
sigdict[key] = value
if not len(sigdict):
raise BadJSONError('No attributes to sign')
instr = json.dumps(sigdict, separators=(',',':'), sort_keys=True)
hash = hashlib.sha256(hashlib.sha256(instr).digest()).digest()
ckey = CKey()
ckey.set_privkey(privkey)
signed = ckey.sign(hash)
sigentry = {
'role': role,
'signature_type': 'secp256k1',
'pubkey': binascii.hexlify(ckey.get_pubkey()),
'signature': binascii.hexlify(signed)
}
if extra_keys:
sigentry['extra_signed_keys'] = extra_keys
jsondoc.setdefault('signatures', []).append(sigentry)
return jsondoc
def sendtoaddress(self, toaddress, amount):
# select the input addresses
funds = 0
subaccounts = []
accounts = self.getaccounts()
for account in accounts:
for address, subaccount in account.iteritems():
if subaccount['balance'] == 0:
continue
else:
subaccounts.append(subaccount)
# print "got one subaccount", subaccount
# print "subaccounts: ", subaccounts
funds = funds + subaccount['balance']
if funds >= amount + utils.calculate_fees(None):
break
# print "subaccounts 2: ", subaccounts
# incase of insufficient funds, return
if funds < amount + utils.calculate_fees(None):
print "In sufficient funds, exiting, return"
return
# create transaction
tx = CTransaction()
# print "subaccounts 3: ", subaccounts
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(toaddress)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
public_keys = []
private_keys = []
# secrets = []
# print "subaccounts 4: ", subaccounts
for subaccount in subaccounts:
# print "subaccount: ", subaccount
# get received by from address
previous_txouts = subaccount['received']
# print "Previous txouts", previous_txouts
for received in previous_txouts:
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = binascii.unhexlify(received['scriptPubKey'])
tx.vin.append(txin)
nValueIn = nValueIn + received['value']
public_keys.append(subaccount['public_key'])
private_keys.append(subaccount['private_key'])
# secrets.append(subaccount['secret'])
if nValueIn >= amount + utils.calculate_fees(tx):
break
if nValueIn >= amount + utils.calculate_fees(tx):
break
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = utils.calculate_fees(tx)
# create change transaction, if there is any change left
if excessAmount > fees:
change_txout = CTxOut()
change_txout.nValue = excessAmount - fees
changeaddress = subaccounts[0]['address']
change_txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(changeaddress)
tx.vout.append(change_txout)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
# sign the transaction
for public_key, private_key, txin in zip(public_keys, private_keys, tx.vin):
key = CKey()
key.set_pubkey(public_key)
key.set_privkey(private_key)
signature = key.sign(txhash)
# scriptSig = chr(len(signature)) + hash_type + signature + chr(len(public_key)) + public_key
scriptSig = chr(len(signature)) + signature + chr(len(public_key)) + public_key
print "Adding signature: ", binascii.hexlify(scriptSig)
txin.scriptSig = scriptSig
print "Tx Validity: ", tx.is_valid()
return tx
def sendtovault(self, vault_address, amount):
# select the input addresses
funds = 0
subaccounts = []
accounts = self.getaccounts()
for account in accounts:
for address, subaccount in account.iteritems():
if subaccount['balance'] == 0:
continue
else:
subaccounts.append(subaccount)
funds = funds + subaccount['balance']
if funds >= amount + utils.calculate_fees(None):
break
# incase of insufficient funds, return
if funds < amount + utils.calculate_fees(None):
self.logger.warning("Insufficient funds, exiting, return")
raise exceptions.InsufficientBalanceException
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.vault_address_to_pay_to_vault_script(vault_address)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
public_keys = []
private_keys = []
for subaccount in subaccounts:
# get received by from address
previous_txouts = subaccount['received']
for received in previous_txouts:
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
nValueIn = nValueIn + received['value']
public_keys.append(subaccount['public_key'])
private_keys.append(subaccount['private_key'])
if nValueIn >= amount + utils.calculate_fees(tx):
break
if nValueIn >= amount + utils.calculate_fees(tx):
break
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = utils.calculate_fees(tx)
# create change transaction, if there is any change left
if excessAmount > fees:
change_txout = CTxOut()
change_txout.nValue = excessAmount - fees
changeaddress = self.getnewaddress()[1]
change_txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(changeaddress)
tx.vout.append(change_txout)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
self.logger.debug("Sending to vault %064x" % tx.sha256)
# sign the transaction
for public_key, private_key, txin in zip(public_keys, private_keys, tx.vin):
key = CKey()
key.set_pubkey(public_key)
key.set_privkey(private_key)
signature = key.sign(txhash)
# scriptSig = chr(len(signature)) + hash_type + signature + chr(len(public_key)) + public_key
scriptSig = chr(len(signature)) + signature + chr(len(public_key)) + public_key
self.logger.debug("Adding signature: %s" % binascii.hexlify(scriptSig))
txin.scriptSig = scriptSig
self.logger.debug("Tx Validity: %064x" % tx.is_valid())
# push data to vault
tx.calc_sha256()
self.set(str("vault:" + vault_address), {'txhash': tx.sha256})
return (vault_address, tx)
000000001976a914097072524438d003d23a2f23edb65aae1bb3e46988ac0000000001000000"""
# print x
dhash = binascii.unhexlify(
"9302bda273a887cb40c13e02a50b4071a31fd3aae3ae04021b0b843dd61ad18e")
PRIVATE_KEY = 0x18E14A7B6A307F426A94F8114701E7C8E774E7F9A47E2C2035DB29A206321725
HEX_TRANSACTION = "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"
#output to redeem. must exist in HEX_TRANSACTION
k = CKey()
k.generate(('%064x' % PRIVATE_KEY).decode('hex'))
#here we retrieve the public key data generated from the supplied private key
pubkey_data = k.get_pubkey()
#then we create a signature over the hash of the signature-less transaction
signed_data = k.sign(dhash)
print binascii.hexlify(signed_data)
"""
# Add four-byte version field: 01000000
# One-byte varint specifying the number of inputs: 01
# 32-byte hash of the transaction from which we want to redeem an output: eccf7e3034189b851985d871f91384b8ee357cd47c3024736e5676eb2debb3f2
# Four-byte field denoting the output index we want to redeem from the transaction with the above hash (output number 2 = output index 1): 01000000
Now comes the scriptSig. For the purpose of signing the transaction, this is temporarily filled with the scriptPubKey of the output we want to redeem. First we write a one-byte varint which denotes the length of the scriptSig (0x19 = 25 bytes): 19
Then we write the actual scriptSig (which is the scriptPubKey of the output we want to redeem): 76a914010966776006953d5567439e5e39f86a0d273bee88ac
Then we write a four-byte field denoting the sequence. This is currently always set to 0xffffffff: ffffffff
# Next comes a one-byte varint containing the number of outputs in our new transaction. We will set this to 1 in this example: 01
# We then write an 8-byte field (64 bit integer) containing the amount we want to redeem from the specified output. I will set this to the total amount available
# in the output minus a fee of 0.001 BTC (0.999 BTC, or 99900000 Satoshis): 605af40500000000
# Then we start writing our transaction's output. We start with a one-byte varint denoting the length of the output script (0x19 or 25 bytes): 19
# Then the actual output script: 76a914097072524438d003d23a2f23edb65aae1bb3e46988ac
# Then we write the four-byte "lock time" field: 00000000
0000001976a914010966776006953d5567439e5e39f86a0d273bee88acffffffff01605af405
000000001976a914097072524438d003d23a2f23edb65aae1bb3e46988ac0000000001000000"""
# print x
dhash = binascii.unhexlify("9302bda273a887cb40c13e02a50b4071a31fd3aae3ae04021b0b843dd61ad18e")
PRIVATE_KEY=0x18E14A7B6A307F426A94F8114701E7C8E774E7F9A47E2C2035DB29A206321725
HEX_TRANSACTION="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"
#output to redeem. must exist in HEX_TRANSACTION
k = CKey()
k.generate(('%064x' % PRIVATE_KEY).decode('hex'))
#here we retrieve the public key data generated from the supplied private key
pubkey_data = k.get_pubkey()
#then we create a signature over the hash of the signature-less transaction
signed_data = k.sign(dhash)
print binascii.hexlify(signed_data)
"""
# Add four-byte version field: 01000000
# One-byte varint specifying the number of inputs: 01
# 32-byte hash of the transaction from which we want to redeem an output: eccf7e3034189b851985d871f91384b8ee357cd47c3024736e5676eb2debb3f2
# Four-byte field denoting the output index we want to redeem from the transaction with the above hash (output number 2 = output index 1): 01000000
Now comes the scriptSig. For the purpose of signing the transaction, this is temporarily filled with the scriptPubKey of the output we want to redeem. First we write a one-byte varint which denotes the length of the scriptSig (0x19 = 25 bytes): 19
Then we write the actual scriptSig (which is the scriptPubKey of the output we want to redeem): 76a914010966776006953d5567439e5e39f86a0d273bee88ac
Then we write a four-byte field denoting the sequence. This is currently always set to 0xffffffff: ffffffff
# Next comes a one-byte varint containing the number of outputs in our new transaction. We will set this to 1 in this example: 01
# We then write an 8-byte field (64 bit integer) containing the amount we want to redeem from the specified output. I will set this to the total amount available
# in the output minus a fee of 0.001 BTC (0.999 BTC, or 99900000 Satoshis): 605af40500000000
# Then we start writing our transaction's output. We start with a one-byte varint denoting the length of the output script (0x19 or 25 bytes): 19
# Then the actual output script: 76a914097072524438d003d23a2f23edb65aae1bb3e46988ac
def sendtovault(self, vault_address, amount):
# select the input addresses
funds = 0
subaccounts = []
accounts = self.getaccounts()
for account in accounts:
for address, subaccount in account.iteritems():
if subaccount['balance'] == 0:
continue
else:
subaccounts.append(subaccount)
funds = funds + subaccount['balance']
if funds >= amount + utils.calculate_fees(None):
break
# incase of insufficient funds, return
if funds < amount + utils.calculate_fees(None):
self.logger.warning("Insufficient funds, exiting, return")
raise exceptions.InsufficientBalanceException
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.vault_address_to_pay_to_vault_script(
vault_address)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
public_keys = []
private_keys = []
for subaccount in subaccounts:
# get received by from address
previous_txouts = subaccount['received']
for received in previous_txouts:
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
nValueIn = nValueIn + received['value']
public_keys.append(subaccount['public_key'])
private_keys.append(subaccount['private_key'])
if nValueIn >= amount + utils.calculate_fees(tx):
break
if nValueIn >= amount + utils.calculate_fees(tx):
break
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = utils.calculate_fees(tx)
# create change transaction, if there is any change left
if excessAmount > fees:
change_txout = CTxOut()
change_txout.nValue = excessAmount - fees
changeaddress = self.getnewaddress()[1]
change_txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(
changeaddress)
tx.vout.append(change_txout)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
self.logger.debug("Sending to vault %064x" % tx.sha256)
# sign the transaction
for public_key, private_key, txin in zip(public_keys, private_keys,
tx.vin):
key = CKey()
key.set_pubkey(public_key)
key.set_privkey(private_key)
signature = key.sign(txhash)
# scriptSig = chr(len(signature)) + hash_type + signature + chr(len(public_key)) + public_key
scriptSig = chr(len(signature)) + signature + chr(
len(public_key)) + public_key
self.logger.debug("Adding signature: %s" %
binascii.hexlify(scriptSig))
txin.scriptSig = scriptSig
self.logger.debug("Tx Validity: %064x" % tx.is_valid())
# push data to vault
tx.calc_sha256()
self.set(str("vault:" + vault_address), {'txhash': tx.sha256})
return (vault_address, tx)
def sendtoaddress(self, toaddress, amount):
# select the input addresses
funds = 0
subaccounts = []
accounts = self.getaccounts()
for account in accounts:
for address, subaccount in account.iteritems():
if subaccount['balance'] == 0:
continue
else:
subaccounts.append(subaccount)
funds = funds + subaccount['balance']
if funds >= amount + utils.calculate_fees(None):
break
# incase of insufficient funds, return
if funds < amount + utils.calculate_fees(None):
self.logger.warning("Insufficient funds, exiting, return")
return None, None
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(toaddress)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
public_keys = []
private_keys = []
# secrets = []
for subaccount in subaccounts:
# get received by from address
previous_txouts = subaccount['received']
for received in previous_txouts:
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
nValueIn = nValueIn + received['value']
public_keys.append(subaccount['public_key'])
private_keys.append(subaccount['private_key'])
# secrets.append(subaccount['secret'])
if nValueIn >= amount + utils.calculate_fees(tx):
break
if nValueIn >= amount + utils.calculate_fees(tx):
break
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = utils.calculate_fees(tx)
# create change transaction, if there is any change left
if excessAmount > fees:
change_txout = CTxOut()
change_txout.nValue = excessAmount - fees
changeaddress = subaccounts[0]['address']
change_txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(
changeaddress)
tx.vout.append(change_txout)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
# sign the transaction
for public_key, private_key, txin in zip(public_keys, private_keys,
tx.vin):
key = CKey()
key.set_pubkey(public_key)
key.set_privkey(private_key)
signature = key.sign(txhash)
# scriptSig = chr(len(signature)) + hash_type + signature + chr(len(public_key)) + public_key
scriptSig = chr(len(signature)) + signature + chr(
len(public_key)) + public_key
txin.scriptSig = scriptSig
return amount, tx
