def encodeItem(item, itemLen, prefix):
if itemLen <= SHORT_PAYLOAD:
return DataType.intToBytes(prefix + itemLen) + item
else:
itemLen = DataType.intToBytes(itemLen)
return DataType.intToBytes(prefix + len(itemLen) +
SHORT_PAYLOAD) + itemLen + item
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 decode(buffer):
decodedBuffer = b''
if len(buffer) > 0:
prefix = buffer[0]
if prefix >= BYTE_PREFIX_START and prefix <= BYTE_PREFIX_END:
decodedBuffer += DataType.intToBytes(prefix)
elif prefix >= STRING_PREFIX_START and prefix <= STRING_PREFIX_END:
offset = 1
decodedBufferLen = None
if prefix > STRING_55_LEN_MAX_RANGE:
prefixLen = prefix - STRING_55_LEN_MAX_RANGE
bufferLen = buffer[offset:offset + prefixLen]
decodedBufferLen = DataType.bytesToInt(bufferLen)
offset += prefixLen
else:
decodedBufferLen = prefix - STRING_PREFIX_START
decodedBuffer += buffer[offset:offset + decodedBufferLen]
elif prefix >= LIST_PREFIX_START and prefix <= LIST_PREFIX_END:
decodedBuffer = []
offset = 1
decodedBufferLen = None
if prefix > LIST_55_LEN_MAX_RANGE:
prefixLen = prefix - LIST_55_LEN_MAX_RANGE
bufferLen = buffer[offset:offset + prefixLen]
decodedBufferLen = DataType.bytesToInt(bufferLen)
offset += prefixLen
else:
decodedBufferLen = prefix - LIST_PREFIX_START
buffer = buffer[offset:offset + decodedBufferLen]
while len(buffer) > 0:
tempBufferDecoded = decode(buffer)
decodedBuffer.append(tempBufferDecoded)
offset = 1
prefix = buffer[0]
if prefix >= BYTE_PREFIX_START and prefix <= BYTE_PREFIX_END:
decodedBufferLen = 0
elif prefix >= STRING_PREFIX_START and prefix <= STRING_PREFIX_END:
if prefix > STRING_55_LEN_MAX_RANGE:
prefixLen = prefix - STRING_55_LEN_MAX_RANGE
bufferLen = buffer[offset:offset + prefixLen]
decodedBufferLen = DataType.bytesToInt(bufferLen)
offset += prefixLen
else:
decodedBufferLen = prefix - STRING_PREFIX_START
elif prefix >= LIST_PREFIX_START and prefix <= LIST_PREFIX_END:
if prefix > LIST_55_LEN_MAX_RANGE:
prefixLen = prefix - LIST_55_LEN_MAX_RANGE
bufferLen = buffer[offset:offset + prefixLen]
decodedBufferLen = DataType.bytesToInt(bufferLen)
offset += prefixLen
else:
decodedBufferLen = prefix - LIST_PREFIX_START
buffer = buffer[offset + decodedBufferLen:]
return decodedBuffer
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 call(self):
gas = self.popAsInt()
address = DataType.intToBytes(self.pop())
value = self.popAsInt()
argsOffset = self.popAsInt()
argsLength = self.popAsInt()
retOffset = self.popAsInt()
retLength = self.popAsInt()
self.transaction.addInternalOutput(address, Script.verifySignature(), value)
_address = self.output.address
_script = self.output.script
_value = self.output.value - value
self.transaction.addInternalOutput(_address, _script, _value)
#self.memory[retOffset:retOffset + retLength] = self.memory[argsOffset:argsOffset + argsLength]
self.stack.append(1)
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