def get_fees( inputs, outputs ):
"""
Given a transaction's outputs, look up its fees:
* the first output should be an OP_RETURN with the transfer info
* the second output should be the new owner's address, with a DEFAULT_DUST_FEE
* the third output should be the change address
Return (dust fees, operation fees) on success
Return (None, None) on invalid output listing
"""
if len(outputs) != 3:
return (None, None)
# 0: op_return
if not tx_output_is_op_return( outputs[0] ):
return (None, None)
if outputs[0]["value"] != 0:
return (None, None)
# 1: transfer address
if script_hex_to_address( outputs[1]["script_hex"] ) is None:
return (None, None)
# 2: change address
if script_hex_to_address( outputs[2]["script_hex"] ) is None:
return (None, None)
dust_fee = (len(inputs) + 2) * DEFAULT_DUST_FEE + DEFAULT_OP_RETURN_FEE
op_fee = DEFAULT_DUST_FEE
return (dust_fee, op_fee)
def get_fees(inputs, outputs):
"""
Given a transaction's outputs, look up its fees:
* the first output should be an OP_RETURN with the transfer info
* the second output should be the new owner's address, with a DEFAULT_DUST_FEE
* the third output should be the change address
Return (dust fees, operation fees) on success
Return (None, None) on invalid output listing
"""
if len(outputs) != 3:
return (None, None)
# 0: op_return
if not tx_output_is_op_return(outputs[0]):
return (None, None)
if outputs[0]["value"] != 0:
return (None, None)
# 1: transfer address
if script_hex_to_address(outputs[1]["script_hex"]) is None:
return (None, None)
# 2: change address
if script_hex_to_address(outputs[2]["script_hex"]) is None:
return (None, None)
dust_fee = (len(inputs) + 2) * DEFAULT_DUST_FEE + DEFAULT_OP_RETURN_FEE
op_fee = DEFAULT_DUST_FEE
return (dust_fee, op_fee)
def get_fees( inputs, outputs ):
"""
Given a transaction's outputs, look up its fees:
* the first output must be an OP_RETURN, and it must have a fee of 0.
* the second output must be the reveal address, and it must have a dust fee
* the third must be the change address
* the fourth, if given, must be a burned fee sent to the burn address
Return (dust fees, operation fees) on success
Return (None, None) on invalid output listing
"""
dust_fee = 0
op_fee = 0
if len(outputs) != 3 and len(outputs) != 4:
log.debug("len(outputs) == %s" % len(outputs))
return (None, None)
# 0: op_return
if not tx_output_is_op_return( outputs[0] ):
log.debug("output[0] is not an OP_RETURN")
return (None, None)
# 1: reveal address
if script_hex_to_address( outputs[1]["script_hex"] ) is None:
log.debug("output[1] is not a p2pkh script")
return (None, None)
# 2: change address
if script_hex_to_address( outputs[2]["script_hex"] ) is None:
log.debug("output[2] is not a p2pkh script")
return (None, None)
# 3: burn address, if given
if len(outputs) == 4:
addr_hash = script_hex_to_address( outputs[3]["script_hex"] )
if addr_hash is None:
log.debug("output[3] is not a p2pkh script")
return (None, None)
if addr_hash != BLOCKSTACK_BURN_ADDRESS:
log.debug("output[3] is not the burn address (got %s)" % addr_hash)
return (None, None)
dust_fee = (len(inputs) + 3) * DEFAULT_DUST_FEE + DEFAULT_OP_RETURN_FEE
op_fee = outputs[3]["value"]
else:
dust_fee = (len(inputs) + 2) * DEFAULT_DUST_FEE + DEFAULT_OP_RETURN_FEE
return (dust_fee, op_fee)
def get_fees( inputs, outputs ):
"""
Given a transaction's outputs, look up its fees:
* the first output must be an OP_RETURN, and it must have a fee of 0.
* the second output must be the reveal address, and it must have a dust fee
* the third must be the change address
* the fourth, if given, must be a burned fee sent to the burn address
Return (dust fees, operation fees) on success
Return (None, None) on invalid output listing
"""
dust_fee = 0
op_fee = 0
if len(outputs) != 3 and len(outputs) != 4:
return (None, None)
# 0: op_return
if not tx_output_is_op_return( outputs[0] ):
return (None, None)
if outputs[0]["value"] != 0:
return (None, None)
# 1: reveal address
if script_hex_to_address( outputs[1]["script_hex"] ) is None:
return (None, None)
# 2: change address
if script_hex_to_address( outputs[2]["script_hex"] ) is None:
return (None, None)
# 3: burn address, if given
if len(outputs) == 4:
addr_hash = script_hex_to_address( outputs[3]["script_hex"] )
if addr_hash is None:
return (None, None)
if addr_hash != BLOCKSTORE_BURN_PUBKEY_HASH:
return (None, None)
dust_fee = (len(inputs) + 3) * DEFAULT_DUST_FEE + DEFAULT_OP_RETURN_FEE
op_fee = outputs[3]["value"]
else:
dust_fee = (len(inputs) + 2) * DEFAULT_DUST_FEE + DEFAULT_OP_RETURN_FEE
return (dust_fee, op_fee)
def get_fees(inputs, outputs):
"""
Given a transaction's outputs, look up its fees:
* there should be two outputs: the OP_RETURN and change address
Return (dust fees, operation fees) on success
Return (None, None) on invalid output listing
"""
if len(outputs) != 2:
return (None, None)
# 0: op_return
if not tx_output_is_op_return(outputs[0]):
return (None, None)
if outputs[0]["value"] != 0:
return (None, None)
# 1: change address
if script_hex_to_address(outputs[1]["script_hex"]) is None:
return (None, None)
dust_fee = (len(inputs) + 1) * DEFAULT_DUST_FEE + DEFAULT_OP_RETURN_FEE
op_fee = 0
return (dust_fee, op_fee)
def get_fees( inputs, outputs ):
"""
Given a transaction's outputs, look up its fees:
* there should be two outputs: the OP_RETURN and change address
Return (dust fees, operation fees) on success
Return (None, None) on invalid output listing
"""
if len(outputs) != 2:
return (None, None)
# 0: op_return
if not tx_output_is_op_return( outputs[0] ):
return (None, None)
if outputs[0]["value"] != 0:
return (None, None)
# 1: change address
if script_hex_to_address( outputs[1]["script_hex"] ) is None:
return (None, None)
dust_fee = (len(inputs) + 1) * DEFAULT_DUST_FEE + DEFAULT_OP_RETURN_FEE
op_fee = 0
return (dust_fee, op_fee)
def get_fees( inputs, outputs ):
"""
Given a transaction's outputs, look up its fees:
* the first output must be an OP_RETURN, and it must have a fee of 0.
# the second must be the change address
* the third must be a burn fee to the burn address.
Return (dust fees, operation fees) on success
Return (None, None) on invalid output listing
"""
if len(outputs) != 3:
log.debug("Expected 3 outputs; got %s" % len(outputs))
return (None, None)
# 0: op_return
if not tx_output_is_op_return( outputs[0] ):
log.debug("outputs[0] is not an OP_RETURN")
return (None, None)
if outputs[0]["value"] != 0:
log.debug("outputs[0] has value %s'" % outputs[0]["value"])
return (None, None)
# 1: change address
if script_hex_to_address( outputs[1]["script_hex"] ) is None:
log.error("outputs[1] has no decipherable change address")
return (None, None)
# 2: burn address
addr_hash = script_hex_to_address( outputs[2]["script_hex"] )
if addr_hash is None:
log.error("outputs[2] has no decipherable burn address")
return (None, None)
if addr_hash != BLOCKSTORE_BURN_ADDRESS:
log.error("outputs[2] is not the burn address")
return (None, None)
dust_fee = (len(inputs) + 2) * DEFAULT_DUST_FEE + DEFAULT_OP_RETURN_FEE
op_fee = outputs[2]["value"]
return (dust_fee, op_fee)
def get_fees(inputs, outputs):
"""
Given a transaction's outputs, look up its fees:
* the first output must be an OP_RETURN, and it must have a fee of 0.
# the second must be the change address
* the third must be a burn fee to the burn address.
Return (dust fees, operation fees) on success
Return (None, None) on invalid output listing
"""
if len(outputs) != 3:
log.debug("Expected 3 outputs; got %s" % len(outputs))
return (None, None)
# 0: op_return
if not tx_output_is_op_return(outputs[0]):
log.debug("outputs[0] is not an OP_RETURN")
return (None, None)
if outputs[0]["value"] != 0:
log.debug("outputs[0] has value %s'" % outputs[0]["value"])
return (None, None)
# 1: change address
if script_hex_to_address(outputs[1]["script_hex"]) is None:
log.error("outputs[1] has no decipherable change address")
return (None, None)
# 2: burn address
addr_hash = script_hex_to_address(outputs[2]["script_hex"])
if addr_hash is None:
log.error("outputs[2] has no decipherable burn address")
return (None, None)
if addr_hash != BLOCKSTORE_BURN_ADDRESS:
log.error("outputs[2] is not the burn address")
return (None, None)
dust_fee = (len(inputs) + 2) * DEFAULT_DUST_FEE + DEFAULT_OP_RETURN_FEE
op_fee = outputs[2]["value"]
return (dust_fee, op_fee)
def script_hex_to_address( script_hex ):
"""
Examine a scriptPubkey and extract an address.
"""
if script_hex.startswith("76a914") and script_hex.endswith("88ac") and len(script_hex) == 50:
# p2pkh script
return pybitcoin.script_hex_to_address( script_hex, version_byte=version_byte )
elif script_hex.startswith("a914") and script_hex.endswith("87") and len(script_hex) == 46:
# p2sh script
return bitcoin.script_to_address( script_hex, vbyte=multisig_version_byte )
else:
raise ValueError("Nonstandard script %s" % script_hex)
def script_hex_address(script_hex):
"""
Examine a scriptPubkey and extract an address
"""
if script_hex.startswith("76a914") and script_hex.endswith("88ac") and len(
script_hex) == 50:
# p2pkh script
return pybitcoin.script_hex_to_address(script_hex,
version_byte=version_byte)
elif script_hex.startswith("a914") and script_hex.endswith("87") and len(
script_hex) == 46:
# p2sh script
return bitcoin.script_to_address(script_hex,
vbyte=multisig_version_byte)
else:
raise ValueError("Nonstandard script %s" % script_hex)
def btc_decoderawtransaction_compat( tx_hex ):
"""
Implementation of bitcoind's decoderawtransaction
JSONRPC method. Tries to be faithful enough to
bitcoind for virtualchain's sake.
Does NOT handle coinbase transactions
"""
inputs, outputs, locktime, version = tx_deserialize( tx_hex )
txid = make_txid( tx_hex )
vin = []
vout = []
for inp in inputs:
vin_inp = {
"txid": inp['transaction_hash'],
"vout": inp['output_index'],
}
if inp.has_key("script_sig"):
scriptsig_hex = inp['script_sig']
scriptsig_asm = btc_decoderawtransaction_script_hex_to_asm( scriptsig_hex )
vin_inp['scriptSig'] = {
'asm': scriptsig_asm,
'hex': scriptsig_hex
}
if inp.has_key("sequence"):
vin_inp['sequence'] = inp['sequence']
vin.append( vin_inp )
for i in xrange( 0, len(outputs) ):
out = outputs[i]
script_type = btc_decoderawtransaction_get_script_type( out['script_hex'] )
addresses = []
if script_type == "pubkeyhash":
addresses.append( pybitcoin.script_hex_to_address( out['script_hex'] ) )
elif script_type == "pubkey":
pubkey = btc_decoderawtransaction_get_pubkey_from_script( out['script_hex'] )
addr = pybitcoin.BitcoinPublicKey( pubkey ).address()
addresses.append( addr )
elif script_type == "scripthash":
script_hash = btc_decoderawtransaction_get_script_hash_from_script( out['script_hex'] )
addr = pybitcoin.b58check_encode( binascii.unhexlify( script_hash ), version_byte=5 )
addresses.append( addr )
vout_out = {
"value": float(out['value']) / 10e7,
"mock_bitcoind_value_satoshi": out['value'], # NOTE: extra
"n": i,
"scriptPubKey": {
'asm': btc_decoderawtransaction_script_hex_to_asm( out['script_hex'] ),
'hex': out['script_hex'],
"type": script_type
},
}
if script_type in ["pubkeyhash", "pubkey", "scripthash"]:
vout_out['scriptPubKey']['reqSigs'] = 1
if len(addresses) > 0:
vout_out['scriptPubKey']['addresses'] = addresses
vout.append( vout_out )
tx_decoded = {
"txid": txid,
"version": version,
"locktime": locktime,
"vin": vin,
"vout": vout
}
return tx_decoded
def db_parse( block_id, opcode, data, senders, inputs, outputs, fee, db_state=None ):
"""
(required by virtualchain state engine)
Parse a blockstore operation from a transaction's nulldata (data) and a list of outputs, as well as
optionally the list of transaction's senders and the total fee paid.
Return a parsed operation, and will also optionally have:
* "sender": the first (primary) sender's script_pubkey.
* "address": the sender's bitcoin address
* "fee": the total fee paid for this record.
* "recipient": the first non-OP_RETURN output's script_pubkey.
* "sender_pubkey": the sender's public key (hex string), if this is a p2pkh transaction
Return None on error
NOTE: the transactions that our tools put have a single sender, and a single output address.
This is assumed by this code.
"""
sender = None
recipient = None
recipient_address = None
import_update_hash = None
address = None
sender_pubkey_hex = None
if len(senders) == 0:
raise Exception("No senders for (%s, %s)" % (opcode, hexlify(data)))
# the first sender is always the first non-nulldata output script hex, and by construction
# of Blockstore, this is always the principal that issued the operation.
if 'script_pubkey' not in senders[0].keys():
raise Exception("No script_pubkey in sender of (%s, %s)" % (opcode, hexlify(data)))
if 'addresses' not in senders[0].keys():
log.error("No addresses in sender of (%s, %s)" % (opcode, hexlify(data)))
return None
if len(senders[0]['addresses']) != 1:
log.error("Multisig transactions are unsupported for (%s, %s)" % (opcode, hexlify(data)))
return None
sender = str(senders[0]['script_pubkey'])
address = str(senders[0]['addresses'][0])
if str(senders[0]['script_type']) == 'pubkeyhash':
sender_pubkey_hex = get_public_key_hex_from_tx( inputs, address )
if sender_pubkey_hex is None:
log.warning("No public key found for (%s, %s)" % (opcode, hexlify(data)))
op_fee = get_burn_fee_from_outputs( outputs )
if opcode in [NAME_REGISTRATION, NAMESPACE_REVEAL]:
# these operations have a designated recipient that is *not* the sender
try:
recipient = get_registration_recipient_from_outputs( outputs )
recipient_address = pybitcoin.script_hex_to_address( recipient )
except Exception, e:
log.exception(e)
raise Exception("No registration address for (%s, %s)" % (opcode, hexlify(data)))
if opcode in [NAME_REGISTRATION, NAMESPACE_REVEAL]:
# these operations have a designated recipient that is *not* the sender
try:
recipient = get_registration_recipient_from_outputs( outputs )
recipient_address = pybitcoin.script_hex_to_address( recipient )
except Exception, e:
log.exception(e)
raise Exception("No registration address for (%s, %s)" % (opcode, hexlify(data)))
if opcode in [NAME_IMPORT, NAME_TRANSFER]:
# these operations have a designated recipient that is *not* the sender
try:
recipient = get_transfer_recipient_from_outputs( outputs )
recipient_address = pybitcoin.script_hex_to_address( recipient )
except Exception, e:
log.exception(e)
raise Exception("No recipient for (%s, %s)" % (opcode, hexlify(data)))
if opcode in [NAME_IMPORT]:
# this operation has an update hash embedded as a phony recipient
try:
import_update_hash = get_import_update_hash_from_outputs( outputs, recipient )
except Exception, e:
log.exception(e)
raise Exception("No update hash for (%s, %s)" % (opcode, hexlify(data)))
op = parse_blockstore_op_data(opcode, data, sender, recipient=recipient, recipient_address=recipient_address, import_update_hash=import_update_hash )
def db_parse(block_id,
opcode,
data,
senders,
inputs,
outputs,
fee,
db_state=None):
"""
(required by virtualchain state engine)
Parse a blockstore operation from a transaction's nulldata (data) and a list of outputs, as well as
optionally the list of transaction's senders and the total fee paid.
Return a parsed operation, and will also optionally have:
* "sender": the first (primary) sender's script_pubkey.
* "address": the sender's bitcoin address
* "fee": the total fee paid for this record.
* "recipient": the first non-OP_RETURN output's script_pubkey.
* "sender_pubkey": the sender's public key (hex string), if this is a p2pkh transaction
Return None on error
NOTE: the transactions that our tools put have a single sender, and a single output address.
This is assumed by this code.
"""
sender = None
recipient = None
recipient_address = None
import_update_hash = None
address = None
sender_pubkey_hex = None
if len(senders) == 0:
raise Exception("No senders for (%s, %s)" % (opcode, hexlify(data)))
# the first sender is always the first non-nulldata output script hex, and by construction
# of Blockstore, this is always the principal that issued the operation.
if 'script_pubkey' not in senders[0].keys():
raise Exception("No script_pubkey in sender of (%s, %s)" %
(opcode, hexlify(data)))
if 'addresses' not in senders[0].keys():
log.error("No addresses in sender of (%s, %s)" %
(opcode, hexlify(data)))
return None
if len(senders[0]['addresses']) != 1:
log.error("Multisig transactions are unsupported for (%s, %s)" %
(opcode, hexlify(data)))
return None
sender = str(senders[0]['script_pubkey'])
address = str(senders[0]['addresses'][0])
if str(senders[0]['script_type']) == 'pubkeyhash':
sender_pubkey_hex = get_public_key_hex_from_tx(inputs, address)
if sender_pubkey_hex is None:
log.warning("No public key found for (%s, %s)" %
(opcode, hexlify(data)))
op_fee = get_burn_fee_from_outputs(outputs)
if opcode in [NAME_REGISTRATION, NAMESPACE_REVEAL]:
# these operations have a designated recipient that is *not* the sender
try:
recipient = get_registration_recipient_from_outputs(outputs)
recipient_address = pybitcoin.script_hex_to_address(recipient)
except Exception, e:
log.exception(e)
raise Exception("No registration address for (%s, %s)" %
(opcode, hexlify(data)))
if opcode in [NAME_REGISTRATION, NAMESPACE_REVEAL]:
# these operations have a designated recipient that is *not* the sender
try:
recipient = get_registration_recipient_from_outputs(outputs)
recipient_address = pybitcoin.script_hex_to_address(recipient)
except Exception, e:
log.exception(e)
raise Exception("No registration address for (%s, %s)" %
(opcode, hexlify(data)))
if opcode in [NAME_IMPORT, NAME_TRANSFER]:
# these operations have a designated recipient that is *not* the sender
try:
recipient = get_transfer_recipient_from_outputs(outputs)
recipient_address = pybitcoin.script_hex_to_address(recipient)
except Exception, e:
log.exception(e)
raise Exception("No recipient for (%s, %s)" %
(opcode, hexlify(data)))
if opcode in [NAME_IMPORT]:
# this operation has an update hash embedded as a phony recipient
try:
import_update_hash = get_import_update_hash_from_outputs(
outputs, recipient)
except Exception, e:
log.exception(e)
raise Exception("No update hash for (%s, %s)" %
(opcode, hexlify(data)))
def btc_decoderawtransaction_compat( tx_hex ):
"""
Implementation of bitcoind's decoderawtransaction
JSONRPC method. Tries to be faithful enough to
bitcoind for virtualchain's sake.
Does NOT handle coinbase transactions
"""
inputs, outputs, locktime, version = tx_deserialize( tx_hex )
txid = make_txid( tx_hex )
vin = []
vout = []
for inp in inputs:
vin_inp = {
"txid": inp['transaction_hash'],
"vout": inp['output_index'],
}
if inp.has_key("script_sig"):
scriptsig_hex = inp['script_sig']
scriptsig_asm = btc_decoderawtransaction_script_hex_to_asm( scriptsig_hex )
vin_inp['scriptSig'] = {
'asm': scriptsig_asm,
'hex': scriptsig_hex
}
if inp.has_key("sequence"):
vin_inp['sequence'] = inp['sequence']
vin.append( vin_inp )
for i in xrange( 0, len(outputs) ):
out = outputs[i]
script_type = btc_decoderawtransaction_get_script_type( out['script_hex'] )
addresses = []
if script_type == "pubkeyhash":
addresses.append( pybitcoin.script_hex_to_address( out['script_hex'] ) )
elif script_type == "pubkey":
pubkey = btc_decoderawtransaction_get_pubkey_from_script( out['script_hex'] )
addr = pybitcoin.BitcoinPublicKey( pubkey ).address()
addresses.append( addr )
elif script_type == "scripthash":
script_hash = btc_decoderawtransaction_get_script_hash_from_script( out['script_hex'] )
addr = pybitcoin.b58check_encode( binascii.unhexlify( script_hash ), version_byte=5 )
addresses.append( addr )
vout_out = {
"value": float(out['value']) / 10e7,
"mock_bitcoind_value_satoshi": out['value'], # NOTE: extra
"n": i,
"scriptPubKey": {
'asm': btc_decoderawtransaction_script_hex_to_asm( out['script_hex'] ),
'hex': out['script_hex'],
"type": script_type
},
}
if script_type in ["pubkeyhash", "pubkey", "scripthash"]:
vout_out['scriptPubKey']['reqSigs'] = 1
if len(addresses) > 0:
vout_out['scriptPubKey']['addresses'] = addresses
vout.append( vout_out )
tx_decoded = {
"txid": txid,
"version": version,
"locktime": locktime,
"vin": vin,
"vout": vout
}
return tx_decoded