def merge():
script = bytearray()
script.append(Config.getIntValue("SCRIPT_VERSION"))
script.append(Opcodes.alias('MERGE', True))
return DataType.serialize(script)
def verifyMultiSignature():
script = bytearray()
script.append(Config.getIntValue("SCRIPT_VERSION"))
script.append(Opcodes.alias('CHECKMULTISIGVERIFY', True))
return DataType.serialize(script)
def verifyAtomicSwapLock():
script = bytearray()
script.append(Config.getIntValue("SCRIPT_VERSION"))
script.append(Opcodes.alias('CHECKATOMICSWAPLOCKVERIFY', True))
return DataType.serialize(script)
def getBasicAuth():
username = Config.getValue("HTTP_RPC_USERNAME")
password = Config.getValue("HTTP_RPC_PASSWORD")
userpass = "******" % (username, password)
userpassBytes = DataType.serialize(userpass)
userpassB64 = b64encode(userpassBytes)
return 'Basic %s' % userpassB64.decode("ascii")
def deploy(self, isLocal, callback):
result = None
fromAccount = Accounts.getAccountByAddress(self.fromAddress)
if fromAccount != None:
if isLocal:
toAddress = Crypto.generateAddress(fromAccount.address)
_script = bytearray()
_script.append(Config.getIntValue("EXTENSION_SCRIPT_VERSION"))
_script.extend(self.script)
_script = DataType.serialize(_script)
extraData = None
if len(self.parameters) > 0:
extraData = self.parameters
extraData.append(fromAccount.address)
output = Output(toAddress, _script, self.value, extraData)
result = self.handleLocalScript(fromAccount, output, True)
if result != None:
Contracts.addContract(Contract(toAddress), False)
else:
result = MemoryPool.addUnconfirmedTransaction(
fromAccount, None, self.value, self.gasLimit,
self.gasPrice, self.script, self.parameters)
try:
result = DataType.toHex(result)
except:
pass
if result != None:
callback(JSONRPC.createResultObject(result, self.id))
else:
self.onFailure(callback)
def writeResponse(self, response):
response = DataType.serialize(response)
responseLen = len(response)
responseLen = DataType.intToBytes(
responseLen, Config.getIntValue("SOCKET_HEADER_BUFFER_SIZE"))
self.request.sendall(responseLen)
self.request.sendall(response)
def open(self, subDatabase=None):
self.lock.acquire()
self.db = lmdb.open(self.database,
max_dbs=Config.getIntValue('MAX_DATABASES'))
subDatabaseBytes = DataType.serialize(
self.subDatabase if subDatabase == None else subDatabase)
self.subDb = self.db.open_db(subDatabaseBytes)
def verifySignature():
script = bytearray()
script.append(Config.getIntValue("SCRIPT_VERSION"))
script.append(Opcodes.alias('DUP1'))
script.append(Opcodes.alias('PUBADDR', True))
script.append(Opcodes.alias('ADDRESS'))
script.append(Opcodes.alias('EQ'))
script.append(Opcodes.alias('VERIFY', True))
script.append(Opcodes.alias('CHECKSIGVERIFY', True))
return DataType.serialize(script)
def writeResponse(self,
response,
contentType='application/json',
doHead=True):
if doHead:
self.do_HEAD(contentType)
else:
self.do_AUTHHEAD()
if contentType == "application/json":
response = json.dumps(response, sort_keys=False)
response = DataType.serialize(response)
self.wfile.write(response)
def sendDataByUDP(host, port, data):
try:
with socket.socket(socket.AF_INET, socket.SOCK_DGRAM,
socket.IPPROTO_UDP) as sock:
sock.settimeout(Config.getIntValue("CONNECTION_TIMEOUT"))
data = DataType.serialize(data)
sock.sendto(data, (host, port))
return sock.recvfrom(
Config.getIntValue("SOCKET_RECEIVE_BUFFER_SIZE"))
except IOError:
Log.error('Unable to send data by UDP to host: %s port: %s data: %s' %
(host, port, data))
return None, None
def initialize(self):
self.code = self.output.script[1:]
parameters = []
if self.deploy:
parameters = [] if self.output.extraData == None else self.output.extraData
else:
if self.output.hasExtScript():
parameters.extend(self.input.witness[3:])
else:
self.stack.extend(self.input.witness)
methodHash = False if self.deploy else True
for parameter in parameters:
if not isinstance(parameter, bytes):
try:
if methodHash:
parameter = DataType.fromHex(parameter)
parameter = DataType.serialize(parameter)
methodHash = False
else:
parameter = DataType.asInt(parameter)
except ValueError:
try:
parameter = DataType.fromHex(parameter)
parameter = DataType.serialize(parameter)
except ValueError:
parameter = Address.toAddressBytes(parameter)
if self.deploy:
self.code += DataType.zeroFillArray(parameter, 32)
else:
if len(self.data) == 0:
self.data += parameter
else:
self.data += DataType.zeroFillArray(parameter, 32)
if len(self.data) > 0 and len(self.data) < 32:
fillLen = 32 - len(self.data)
self.data.extend(fillLen * b'\x00')
def addPeers(peers):
for peer in peers:
if peer.host != Peers.hostname and peer.host != Peers.ipAddress:
currPeer = getPeerByHost(peer.host)
synchronized = False
if currPeer == None:
currPeer = peer
else:
currPeer.merge(peer)
synchronized = True
currPeer.lastUpdate = DataType.asTime()
hostBytes = DataType.serialize(currPeer.host)
Peers.peers.set(hostBytes, currPeer.serialize())
if not synchronized:
Sync.synchronize(currPeer.host)
Sync.addr(currPeer.host)
def send(url, data=None, doBasicAuth=False, headers=None):
try:
if not url.startswith("http"):
url = "http://" + url
if data != None:
data = DataType.serialize(data)
httpHeaders = {}
if doBasicAuth:
httpHeaders.update({'Authorization': getBasicAuth()})
if headers != None:
httpHeaders.update(headers)
req = Request(url, data, httpHeaders)
response = urlopen(req,
timeout=Config.getIntValue("CONNECTION_TIMEOUT"))
return response.read()
except IOError:
Log.error('Unable to send request to url: %s' % url)
return None
def execute(self):
success = False
try:
self.pc = 0
while self.pc < len(self.code):
element = self.code[self.pc]
self.currOpcode = Opcodes.fetch(element, self.override)
self.gasRemaining -= self.currOpcode.gas
print(self.currOpcode.method, self.currOpcode.code, self.pc, self.gasRemaining)
if self.gasRemaining >= 0:
method = getattr(self, self.currOpcode.method)
method()
self.step()
else:
self.pc = len(self.code)
self.invalid = True
if self.invalid:
success = False
else:
if self.output.hasExtScript() or self.merge:
_address = self.output.address if self.overrideAddress == None else self.overrideAddress
_script = self.output.script if self.overrideScript == None else self.overrideScript
_value = self.output.value if self.overrideValue == None else self.overrideValue
if self.deploy and not self.merge:
script = bytearray()
script.append(Config.getIntValue("EXTENSION_SCRIPT_VERSION"))
script.extend(_script)
_script = DataType.serialize(script)
if self.deploy or self.merge or self.localTx:
# Output will be stored in the blockchain and not the UXTO
self.output.store = False
self.transaction.addInternalOutput(_address, _script, _value)
self.transaction.gasRemaining = self.gasRemaining
success = True
if len(self.logs) > 0:
key = self.persistentStorageKey + self.transaction.hash()
PersistentStorage.add(key, self.logs, True)
finally:
if not self.readOnly:
if success:
PersistentStorage.commit(self.persistentStorageKey)
else:
PersistentStorage.rollback(self.persistentStorageKey)
return success
class Peers:
db = Config.getValue("PEERS_DB")
subDb = Config.getValue("PEERS_SUB_DB")
peers = Storage(db, subDb)
hostname = Network.getHostname()
ipAddress = Network.getIpAddress()
if Config.getBoolValue('PEERS_ENABLE_SEEDS'):
with open(Config.getValue('SEEDS_DIR')) as seeds:
hosts = json.load(seeds)
for host in hosts:
if host != hostname and host != ipAddress:
hostBytes = DataType.serialize(host)
if peers.get(hostBytes) == None:
peer = Peer()
peer.host = host
peer.lastUpdate = DataType.asTime()
peers.set(hostBytes, peer.serialize())
def __init__(self):
self.db = Config.getFilePath("CHAIN_DIRECTORY", "BLOCKCHAIN_DB")
self.subDb = Config.getValue("BLOCKS_SUB_DB")
self.storage = Storage(self.db, self.subDb)
self.indexDb = Config.getFilePath("CHAIN_DIRECTORY", "INDEX_DB")
self.subIndexDb = Config.getValue("INDEX_SUB_DB")
self.index = Storage(self.indexDb, self.subIndexDb)
self.CHAIN_HEAD_INDEX = DataType.serialize("CHAIN_HEAD_INDEX")
self.BLOCK_HEIGHT_KEY = "BLOCK_HEIGHT_KEY"
self.blkValidator = ValidatorFactory.getInstance(ValidatorType.BLOCK)
self.txValidator = ValidatorFactory.getInstance(ValidatorType.TX)
self.blkLock = RLock()
self.orphanLock = RLock()
self.miningPool = {}
def syncOrphanBlocks(self):
hasLock = False
try:
hasLock = self.acquireOrphanLock(False)
if hasLock:
orphanBlocks = []
for orphanBlockHash in OrphanManager.getBlocks():
orphanBlock = OrphanManager.getBlock(orphanBlockHash)
previousHash = orphanBlock.previousHash
previousHashBytes = DataType.serialize(previousHash)
if self.index.get(previousHashBytes) != None:
orphanBlocks.append(orphanBlock)
elif not OrphanManager.hasBlock(previousHash):
Sync.getdata(InventoryType.BLOCK, previousHash)
for orphanBlock in orphanBlocks:
OrphanManager.removeBlock(orphanBlock)
for orphanBlock in orphanBlocks:
self.addBlock(orphanBlock)
finally:
if hasLock:
self.releaseOrphanLock()
def encode(item):
item = DataType.serialize(item)
encodedItem = b''
if len(item) > 0:
if isinstance(item, bytes):
itemLen = len(item)
if itemLen == 1 and item[0] <= BYTE_PREFIX_END:
encodedItem += item
else:
encodedItem += encodeItem(item, itemLen, STRING_PREFIX_START)
elif isinstance(item, list):
for i in item:
encodedItem += encode(i)
itemLen = len(encodedItem)
encodedItem = encodeItem(encodedItem, itemLen, LIST_PREFIX_START)
else:
if isinstance(item, bytes):
encodedItem += DataType.intToBytes(STRING_PREFIX_START)
elif isinstance(item, list):
encodedItem += DataType.intToBytes(LIST_PREFIX_START)
return encodedItem
def _sendData(host, data, hasPayload):
try:
if ':' in host:
host = host.split(':')
host[1] = DataType.asInt(host[1])
host = tuple(host)
else:
host = (host, getSocketPort())
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
sock.connect(host)
sock.settimeout(Config.getIntValue("CONNECTION_TIMEOUT"))
data = DataType.serialize(data)
dataLen = len(data)
dataLen = DataType.intToBytes(
dataLen, Config.getIntValue("SOCKET_HEADER_BUFFER_SIZE"))
sock.sendall(dataLen)
sock.sendall(data)
if hasPayload:
payload = getSocketPayload(sock)
return RLP.decode(payload)
except IOError:
Log.error('Unable to send data to host: %s data: %s' % (host, data))
return None
def balance(self):
address = self.pop()
address = DataType.serialize(address)
print('balance', address)
unspentTransactionScript = UXTO.getUnspentTransactionScript(address)
self.stack.append(unspentTransactionScript.output.value)
def createUnconfirmedTransaction(fromAccount,
toAddress,
value,
gasLimit,
gasPrice,
script=None,
parameters=None):
transaction, outpoints = createNewUnconfirmedTransaction(
fromAccount, value, gasLimit, gasPrice)
if transaction != None:
if script != None or parameters != None:
#smart contract
if script == None:
#call
witness = []
witness.append(fromAccount.address)
witness.extend(parameters)
unspentTransactionOutpoint = UXTO.getUnspentTransactionOutpointByAddress(
toAddress)
transaction.addInput(unspentTransactionOutpoint.txId,
unspentTransactionOutpoint.outputIndex,
witness)
if value > 0:
#contract value transfer
_script = Script.merge()
transaction.addOutput(toAddress, _script, value)
else:
#deploy
outpointBytes = bytearray()
for outpoint in outpoints:
outpointBytes.extend(outpoint.serialize())
extensionAddress = Crypto.generateAddress(outpointBytes)
_script = bytearray()
_script.append(Config.getIntValue("EXTENSION_SCRIPT_VERSION"))
_script.extend(script)
_script = DataType.serialize(_script)
extraData = None
if len(parameters) > 0:
extraData = parameters
extraData.append(fromAccount.address)
transaction.addOutput(extensionAddress, _script, value,
extraData)
else:
_script = None
unspentTransactionScript = UXTO.getUnspentTransactionScript(
toAddress)
if unspentTransactionScript != None:
#contract value transfer
_script = Script.merge()
if _script == None:
#value
_script = Script.verifySignature()
transaction.addOutput(toAddress, _script, value)
transaction.sign()
return transaction
def handleCommand(command, parameters):
id = 1
commands = []
if command == 'CreateAtomicSwapAccount':
commands.append(JSONRPC.createMethodObject(command, parameters, id))
elif command == 'CreateMultiSigAccount':
commands.append(JSONRPC.createMethodObject(command, parameters, id))
elif command == 'GetAccounts':
commands.append(JSONRPC.createMethodObject(command, [], id))
elif command == 'GetNewAccount':
commands.append(JSONRPC.createMethodObject(command, [], id))
elif command == 'DeleteAccounts':
commands.append(JSONRPC.createMethodObject(command, parameters, id))
elif command == 'SendTransaction':
fromAddress = parameters[0]
toAddress = parameters[1]
value = DataType.asFloat(parameters[2])
gasLimit = DataType.asInt(parameters[3])
gasPrice = DataType.asFloat(parameters[4])
params = {
'fromAddress': fromAddress,
'toAddress': toAddress,
'value': value,
'gasLimit': gasLimit,
'gasPrice': gasPrice
}
commands.append(JSONRPC.createMethodObject(command, params, id))
elif command == 'SendTransactionToMultiSig':
fromAddress = parameters[0]
threshold = DataType.asInt(parameters[1])
toMultiSigAddress = parameters[2]
value = DataType.asFloat(parameters[3])
gasLimit = DataType.asInt(parameters[4])
gasPrice = DataType.asFloat(parameters[5])
params = {
'fromAddress': fromAddress,
'threshold': threshold,
'toAddress': toMultiSigAddress,
'value': value,
'gasLimit': gasLimit,
'gasPrice': gasPrice
}
commands.append(JSONRPC.createMethodObject(command, params, id))
elif command == 'SendTransactionFromMultiSig':
fromAddress = parameters[0]
publicKeys = []
signatures = []
idx = 0
for parameter in parameters[1:-5]:
if idx % 2 == 0:
publicKeys.append(parameter)
else:
signatures.append(parameter)
idx += 1
threshold = DataType.asInt(parameters[-5])
toAddress = parameters[-4]
value = DataType.asFloat(parameters[-3])
gasLimit = DataType.asInt(parameters[-2])
gasPrice = DataType.asFloat(parameters[-1])
params = {
'fromAddress': fromAddress,
'publicKeys': publicKeys,
'signatures': signatures,
'threshold': threshold,
'toAddress': toAddress,
'value': value,
'gasLimit': gasLimit,
'gasPrice': gasPrice
}
commands.append(JSONRPC.createMethodObject(command, params, id))
elif command == 'SignMultiSigOutput':
multiSigAddress = parameters[0]
threshold = DataType.asInt(parameters[1])
toAddress = parameters[2]
value = DataType.asFloat(parameters[3])
gasLimit = DataType.asInt(parameters[4])
gasPrice = DataType.asFloat(parameters[5])
params = {
'fromAddress': multiSigAddress,
'threshold': threshold,
'toAddress': toAddress,
'value': value,
'gasLimit': gasLimit,
'gasPrice': gasPrice
}
commands.append(JSONRPC.createMethodObject(command, params, id))
elif command == 'GetMiningWorker':
address = parameters[0]
enabled = DataType.asBool(parameters[1])
params = {'address': address, 'enabled': enabled}
commands.append(JSONRPC.createMethodObject(command, params, id))
elif command == 'CreateAtomicSwapTx':
fromAddress = parameters[0]
threshold = DataType.asInt(parameters[1])
toAddress = parameters[2]
value = DataType.asFloat(parameters[3])
gasLimit = DataType.asInt(parameters[4])
gasPrice = DataType.asFloat(parameters[5])
params = {
'fromAddress': fromAddress,
'threshold': threshold,
'toAddress': toAddress,
'value': value,
'gasLimit': gasLimit,
'gasPrice': gasPrice
}
commands.append(JSONRPC.createMethodObject(command, params, id))
elif command == 'SendAtomicSwapTx':
fromAddress = parameters[0]
toAddress = parameters[1]
value = DataType.asFloat(parameters[2])
gasLimit = DataType.asInt(parameters[3])
gasPrice = DataType.asFloat(parameters[4])
params = {
'fromAddress': fromAddress,
'toAddress': toAddress,
'value': value,
'gasLimit': gasLimit,
'gasPrice': gasPrice
}
commands.append(JSONRPC.createMethodObject(command, params, id))
elif command == 'SignAtomicSwapTx':
commands.append(JSONRPC.createMethodObject(command, parameters, id))
elif command == 'WatchContracts':
commands.append(JSONRPC.createMethodObject(command, parameters, id))
elif command == 'DeleteContracts':
commands.append(JSONRPC.createMethodObject(command, parameters, id))
elif command == 'GetContracts':
commands.append(JSONRPC.createMethodObject(command, [], id))
elif command == 'GetScriptLogs':
fromAddress = parameters[0]
scriptAddress = parameters[1]
value = DataType.asFloat(parameters[2])
gasLimit = DataType.asInt(parameters[3])
gasPrice = DataType.asFloat(parameters[4])
params = {
'fromAddress': fromAddress,
'script': scriptAddress,
'value': value,
'gasLimit': gasLimit,
'gasPrice': gasPrice
}
commands.append(JSONRPC.createMethodObject(command, params, id))
elif command == 'DeployScript' or command == 'DeployLocalScript':
fromAddress = parameters[0]
with open(parameters[1], 'r') as scriptFile:
script = scriptFile.read()
_parameters = parameters[2:-3]
value = DataType.asFloat(parameters[-3])
gasLimit = DataType.asInt(parameters[-2])
gasPrice = DataType.asFloat(parameters[-1])
params = {
'fromAddress': fromAddress,
'script': script,
'parameters': _parameters,
'value': value,
'gasLimit': gasLimit,
'gasPrice': gasPrice
}
commands.append(JSONRPC.createMethodObject(command, params, id))
elif command == 'CallTxScript' or command == 'CallLocalScript':
fromAddress = parameters[0]
scriptAddress = parameters[1]
_parameters = parameters[2:-3]
if _parameters and len(_parameters) > 0:
_parameters[0] = DataType.serialize(_parameters[0])
hashFunction = keccak.new(data=_parameters[0], digest_bits=256)
methodHash = hashFunction.hexdigest()
_parameters[0] = methodHash[0:8]
value = DataType.asFloat(parameters[-3])
gasLimit = DataType.asInt(parameters[-2])
gasPrice = DataType.asFloat(parameters[-1])
params = {
'fromAddress': fromAddress,
'script': scriptAddress,
'parameters': _parameters,
'value': value,
'gasLimit': gasLimit,
'gasPrice': gasPrice
}
commands.append(JSONRPC.createMethodObject(command, params, id))
elif command == 'WatchSideChain':
commands.append(JSONRPC.createMethodObject(command, parameters, id))
elif command == 'DeleteSideChains':
commands.append(JSONRPC.createMethodObject(command, parameters, id))
elif command == 'GetSideChains':
commands.append(JSONRPC.createMethodObject(command, [], id))
elif command == 'DeploySideChain':
fromAddress = parameters[0]
parameters = parameters[1]
value = DataType.asFloat(parameters[2])
gasLimit = DataType.asInt(parameters[3])
gasPrice = DataType.asFloat(parameters[4])
params = {
'fromAddress': fromAddress,
'parameters': parameters,
'value': value,
'gasLimit': gasLimit,
'gasPrice': gasPrice
}
commands.append(JSONRPC.createMethodObject(command, params, id))
elif command == 'GetPeers':
commands.append(JSONRPC.createMethodObject(command, [], id))
elif command == 'AddPeers':
commands.append(JSONRPC.createMethodObject(command, parameters, id))
elif command == 'DeletePeers':
commands.append(JSONRPC.createMethodObject(command, parameters, id))
else:
raise ValueError('Unsupported command: ' + command)
url = '%s:%s' % (Http.getNodeHostname(), Http.getHttpPort())
for cmd in commands:
cmd = json.dumps(cmd)
response = Http.send(url, cmd, doBasicAuth=True)
if response == None or len(response) == 0:
print('Empty response from ', url, 'request', cmd)
continue
response = json.loads(response)
value = '\n'
if 'result' in response:
result = response['result']
if isinstance(result, list):
for item in result:
if isinstance(item, dict):
for v in item.values():
value += ('%s\t' % v)
value += '\n'
else:
value += item
value += '\n'
else:
value += DataType.asString(result)
value += '\n'
elif 'error' in response:
error = response['error']
code = error['code']
message = error['message']
data = error['data']
value += '%s %s %s' % (code, message, data)
value += '\n'
print(value)
def getPeerByHost(host):
hostBytes = DataType.serialize(host)
peerBytes = Peers.peers.get(hostBytes)
return getPeerFromBytes(peerBytes)
def subtractConfirmedBalanceByAddress(address, value):
oldConfirmedBalance = getConfirmedBalanceByAddress(address)
newConfirmedBalance = oldConfirmedBalance - value
newConfirmedBalanceBytes = DataType.serialize(newConfirmedBalance)
Accounts.index.set(address, newConfirmedBalanceBytes,
Accounts.balancesSubDb)
def removePeers(peers):
for peer in peers:
hostBytes = DataType.serialize(peer.host)
Peers.peers.remove(hostBytes)
return True
def getBytesValue(key, hexStr=True):
if hexStr:
return DataType.fromHex(Config.config[key])
else:
return DataType.serialize(Config.config[key])
def getIndexBlockByHash(self, blockHash):
blockHashBytes = DataType.serialize(blockHash)
indexBlockBytes = self.index.get(blockHashBytes)
return self.getIndexBlockFromBytes(indexBlockBytes)
def getBlockByHash(self, blockHash):
blockHashBytes = DataType.serialize(blockHash)
blockBytes = self.storage.get(blockHashBytes)
return self.getBlockFromBytes(blockBytes)
def getBlockHashByHeight(self, height):
blockHeightKey = "{0}{1}{2}".format(self.BLOCK_HEIGHT_KEY, '_', height)
blockHeightKey = DataType.serialize(blockHeightKey)
return self.index.get(blockHeightKey)
def addBlock(self, block):
if self.blkValidator.validate(block):
try:
self.acquireBlockLock()
blockHash = block.hash()
blockHashBytes = DataType.serialize(blockHash)
if self.index.get(blockHashBytes) == None:
if not OrphanManager.hasBlock(blockHash):
bits = block.bits
previousChainWork = None
previousHash = block.previousHash
blockGasLimit = block.gasLimit
blockHeight = 0
chainHeadBlock = self.getChainHeadBlock()
chainHeadIndexBlock = self.getIndexBlockByHash(self.CHAIN_HEAD_INDEX)
previousIndexBlock = self.getIndexBlockByHash(previousHash)
if chainHeadIndexBlock == None:
chainHeadIndexBlock = IndexBlock()
if previousIndexBlock != None:
blockHeight = previousIndexBlock.height + 1
previousChainWork = previousIndexBlock.chainWork
if blockHash == Config.getBytesValue('GENESIS_BLOCK_HASH'):
previousChainWork = Config.getIntValue('GENESIS_BLOCK_CHAIN_WORK', 16)
'''
For case 1, adding to main branch:
'''
if previousHash == chainHeadIndexBlock.previousHash or blockHash == Config.getBytesValue('GENESIS_BLOCK_HASH'):
'''
For all but the coinbase transaction, apply the following:
'''
if not self.blkValidator.verifyNonCoinbaseTransactions(block):
return False
'''
Reject if coinbase value > sum of block creation fee and transaction fees
'''
if not self.blkValidator.verifyCoinbaseValue(block):
return False
for transaction in block.transactions:
for txIn in transaction.inputs:
UXTO.removeUnspentTransactionCoin(txIn.outpoint)
uxtoOutputs = []
uxtoOutputs.extend(transaction.outputs)
uxtoOutputs.extend(transaction.internalOutputs)
txOutputSize = 0
for txOut in uxtoOutputs:
if txOut.store:
txOutputSize += 1
outputIndex = 0
for txOut in uxtoOutputs:
UXTO.removeStaleUnspentTransactionScript(txOut)
if txOut.store:
coin = Coin()
coin.output = txOut
coin.txOutputSize = txOutputSize
coin.height = blockHeight
coin.coinbase = transaction.isCoinbase()
UXTO.addUnspentTransactionCoin(Outpoint(transaction.hash(), outputIndex), coin)
outputIndex += 1
'''
For each transaction, "Add to wallet if mine"
'''
'''
For each transaction in the block, delete any matching transaction from the transaction pool
'''
MemoryPool.removeTransaction(transaction)
chainHeadIndexBlock.chainWork = Bits.getChainworkFromBits(previousChainWork, bits)
chainHeadIndexBlock.previousHash = blockHash
chainHeadIndexBlock.gasLimit = blockGasLimit
chainHeadIndexBlock.height = blockHeight
self.index.set(self.CHAIN_HEAD_INDEX, chainHeadIndexBlock.serialize())
else:
blockChainWork = Bits.getChainworkFromBits(previousChainWork, bits)
chainHeadWork = chainHeadIndexBlock.chainWork
hasNewMainChain = blockChainWork > chainHeadWork
if hasNewMainChain:
'''
For case 3, a side branch becoming the main branch:
'''
else:
'''
For case 2, adding to a side branch, we don't do anything.
'''
if hasNewMainChain:
'''
Find the fork block on the main branch which this side branch forks off of
'''
forkBlockHash = self.searchForkBlockHash(previousIndexBlock, chainHeadIndexBlock)
'''
Redefine the main branch to only go up to this fork block
We will set new main chain head below
'''
isNewMainChainValid = True
'''
For each block on the side branch, from the child of the fork block to the leaf, add to the main branch:
'''
prevBlock = self.getBlockByHash(block.previousHash)
while prevBlock.hash() != forkBlockHash:
'''
Do "branch" checks 3-11
'''
'''
3) Transaction list must be non-empty
'''
if not self.blkValidator.verifyTransactionsNonEmpty(prevBlock):
isNewMainChainValid = False
'''
4) Block hash must satisfy claimed nBits proof of work
'''
if not self.blkValidator.validateBlockBits(prevBlock.serializeHeader(), prevBlock.bits):
isNewMainChainValid = False
'''
5) Block timestamp must not be more than two hours in the future
'''
if not self.blkValidator.verifyFutureTimestamp(prevBlock):
isNewMainChainValid = False
'''
6) First transaction must be coinbase (i.e. only 1 input, with hash=0, n=-1), the rest must not be
'''
if not self.blkValidator.verifyInitialCoinbaseTransaction(prevBlock):
isNewMainChainValid = False
'''
7) For each transaction, apply "tx" checks 2-4
2) Make sure neither in or out lists are empty
3) Size in bytes <= TRANSACTION_SIZE_LIMIT
4) Each output value, as well as the total, must be in legal money range
'''
for transaction in prevBlock.transactions:
if not self.txValidator.verifyInputOutputNonEmpty(transaction):
isNewMainChainValid = False
if not self.txValidator.verifyTransactionSizeLimit(transaction):
isNewMainChainValid = False
if not self.txValidator.verifyAllowedOutputValueRange(transaction):
isNewMainChainValid = False
'''
8) For the coinbase (first) transaction, scriptSig length must be 2-100
'''
if not self.blkValidator.verifyCoinbaseWitnessLength(transaction):
isNewMainChainValid = False
'''
9) Reject if sum of transaction sig opcounts > MAX_BLOCK_SIGOPS
'''
if not self.blkValidator.verifyMaxBlockSigOps(transaction):
isNewMainChainValid = False
'''
10) Verify Merkle hash
'''
if not self.blkValidator.verifyMerkleHash(prevBlock):
isNewMainChainValid = False
'''
Verify Witness hash
'''
if not self.blkValidator.verifyWitnessHash(prevBlock):
isNewMainChainValid = False
'''
11) Check if prev block (matching prev hash) is in main branch or side branches. If not, add this to orphan blocks,
then query peer we got this from for 1st missing orphan block in prev chain; done with block
'''
if blockHash != Config.getBytesValue('GENESIS_BLOCK_HASH') and self.getBlockByHash(prevBlock.previousHash) == None:
OrphanManager.addBlock(prevBlock)
isNewMainChainValid = False
'''
For all but the coinbase transaction, apply the following:
'''
if not self.blkValidator.verifyNonCoinbaseTransactions(prevBlock):
isNewMainChainValid = False
'''
Reject if coinbase value > sum of block creation fee and transaction fees
'''
if not self.blkValidator.verifyCoinbaseValue(prevBlock):
isNewMainChainValid = False
'''
(If we have not rejected):
'''
if not isNewMainChainValid:
break
'''
For each transaction, "Add to wallet if mine"
'''
prevBlock = self.getBlockByHash(prevBlock.previousHash)
'''
If we reject at any point, leave the main branch as what it was originally, done with block
'''
if isNewMainChainValid:
chainHeadIndexBlock.chainWork = blockChainWork
chainHeadIndexBlock.previousHash = blockHash
chainHeadIndexBlock.gasLimit = blockGasLimit
chainHeadIndexBlock.height = blockHeight
self.index.set(self.CHAIN_HEAD_INDEX, chainHeadIndexBlock.serialize())
'''
For each block in the old main branch, from the leaf down to the child of the fork block:
'''
oldBlock = chainHeadBlock
while oldBlock.hash() != forkBlockHash:
'''
For each non-coinbase transaction in the block:
'''
for transaction in oldBlock.transactions:
if not transaction.isCoinbase():
'''
Apply "tx" checks 2-9
'''
isTxValid = True
'''
2) Make sure neither in or out lists are empty
'''
if not self.txValidator.verifyInputOutputNonEmpty(transaction):
isTxValid = False
'''
3) Size in bytes <= TRANSACTION_SIZE_LIMIT
'''
if not self.txValidator.verifyTransactionSizeLimit(transaction):
isTxValid = False
'''
4) Each output value, as well as the total, must be in legal money range
'''
if not self.txValidator.verifyAllowedOutputValueRange(transaction):
isTxValid = False
'''
5) Make sure none of the inputs have hash=0, n=-1 (coinbase transactions)
'''
if not self.txValidator.verifyInputsNonCoinbase(transaction):
isTxValid = False
'''
6) size in bytes >= 100[2]
'''
if not self.txValidator.verifyTransactionRequiredSize(transaction):
isTxValid = False
'''
sig opcount <= 2[3]
3) The number of signature operands in the signature (no, that is not redundant) for standard transactions will never exceed two
7) Reject "nonstandard" transactions: scriptSig doing anything other than pushing numbers on the stack,
or script not matching the two usual forms[4]
'''
if not self.txValidator.verifyAddress(transaction):
isTxValid = False
if not self.txValidator.verifyExtraData(transaction):
isTxValid = False
if not self.txValidator.verifyScript(transaction):
isTxValid = False
if not self.txValidator.verifyWitness(transaction):
isTxValid = False
'''
8) Reject if we already have matching tx in the pool,
except in step 8, only look in the transaction pool for duplicates, not the main branch
'''
if not self.txValidator.verifyTransactionDuplicateInPool(transaction):
isTxValid = False
'''
9) For each input, if the referenced output exists in any other tx in the pool, reject this transaction
'''
if not self.txValidator.verifyTxOutputDuplicateInPool(transaction):
isTxValid = False
'''
Add to transaction pool if accepted, else go on to next transaction
'''
if isTxValid:
MemoryPool.addSignedTransaction(transaction)
outputIndex = 0
for txOut in transaction.outputs:
UXTO.removeUnspentTransactionCoin(Outpoint(transaction.hash(), outputIndex))
outputIndex += 1
oldBlock = self.getBlockByHash(oldBlock.previousHash)
'''
For each block in the new main branch, from the child of the fork node to the leaf:
'''
newMainBranchBlocks = []
prevBlock = block
while prevBlock.hash() != forkBlockHash:
newMainBranchBlocks.insert(0, prevBlock)
prevBlock = self.getBlockByHash(prevBlock.previousHash)
for newMainBranchBlock in newMainBranchBlocks:
newMainBranchBlockHash = newMainBranchBlock.hash()
newMainBranchIndexBlock = None
if newMainBranchBlockHash == blockHash:
newMainBranchIndexBlock = chainHeadIndexBlock
else:
newMainBranchIndexBlock = self.getIndexBlockByHash(newMainBranchBlockHash)
for transaction in newMainBranchBlock.transactions:
for txIn in transaction.inputs:
UXTO.removeUnspentTransactionCoin(txIn.outpoint)
uxtoOutputs = []
uxtoOutputs.extend(transaction.outputs)
uxtoOutputs.extend(transaction.internalOutputs)
txOutputSize = 0
for txOut in uxtoOutputs:
if txOut.store:
txOutputSize += 1
outputIndex = 0
for txOut in uxtoOutputs:
UXTO.removeStaleUnspentTransactionScript(txOut)
if txOut.store:
coin = Coin()
coin.output = txOut
coin.txOutputSize = txOutputSize
coin.height = newMainBranchIndexBlock.height
coin.coinbase = transaction.isCoinbase()
UXTO.addUnspentTransactionCoin(Outpoint(transaction.hash(), outputIndex), coin)
outputIndex += 1
'''
For each transaction, "Add to wallet if mine"
'''
'''
For each transaction in the block, delete any matching transaction from the transaction pool
'''
MemoryPool.removeTransaction(transaction)
'''
(If we have not rejected):
'''
self.storage.set(blockHashBytes, block.serialize())
blockHeightKey = "{0}{1}{2}".format(self.BLOCK_HEIGHT_KEY, '_', blockHeight)
blockHeightKey = DataType.serialize(blockHeightKey)
self.index.set(blockHeightKey, blockHashBytes)
indexBlock = IndexBlock()
indexBlock.chainWork = Bits.getChainworkFromBits(previousChainWork, bits)
indexBlock.previousHash = previousHash
indexBlock.gasLimit = blockGasLimit
indexBlock.height = blockHeight
self.index.set(blockHashBytes, indexBlock.serialize())
'''
Relay block to our peers
'''
Sync.inv(InventoryType.BLOCK, blockHash)
'''
For each orphan block for which this block is its prev, run all these steps (including this one) recursively on that orphan
'''
self.syncOrphanBlocks()
return True
finally:
self.releaseBlockLock()
'''
For each orphan block for which this block is its prev, run all these steps (including this one) recursively on that orphan
'''
self.syncOrphanBlocks()
'''
If we rejected, the block is not counted as part of the main branch
'''
return False