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"""
*******************************************************************************
* BTChip Bitcoin Hardware Wallet Python API
* (c) 2014 BTChip - 1BTChip7VfTnrPra5jqci7ejnMguuHogTn
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
********************************************************************************
"""
from .bitcoinVarint import *
from binascii import hexlify
class bitcoinInput:
def __init__(self, bufferOffset=None):
self.prevOut = ""
self.script = ""
self.sequence = ""
if bufferOffset is not None:
buf = bufferOffset['buffer']
offset = bufferOffset['offset']
self.prevOut = buf[offset:offset + 36]
offset += 36
scriptSize = readVarint(buf, offset)
offset += scriptSize['size']
self.script = buf[offset:offset + scriptSize['value']]
offset += scriptSize['value']
self.sequence = buf[offset:offset + 4]
offset += 4
bufferOffset['offset'] = offset
def serialize(self):
result = []
result.extend(self.prevOut)
writeVarint(len(self.script), result)
result.extend(self.script)
result.extend(self.sequence)
return result
def __str__(self):
buf = "Prevout : " + hexlify(self.prevOut) + "\r\n"
buf += "Script : " + hexlify(self.script) + "\r\n"
buf += "Sequence : " + hexlify(self.sequence) + "\r\n"
return buf
class bitcoinOutput:
def __init__(self, bufferOffset=None):
self.amount = ""
self.script = ""
if bufferOffset is not None:
buf = bufferOffset['buffer']
offset = bufferOffset['offset']
self.amount = buf[offset:offset + 8]
offset += 8
scriptSize = readVarint(buf, offset)
offset += scriptSize['size']
self.script = buf[offset:offset + scriptSize['value']]
offset += scriptSize['value']
bufferOffset['offset'] = offset
def serialize(self):
result = []
result.extend(self.amount)
writeVarint(len(self.script), result)
result.extend(self.script)
return result
def __str__(self):
buf = "Amount : " + hexlify(self.amount) + "\r\n"
buf += "Script : " + hexlify(self.script) + "\r\n"
return buf
class bitcoinTransaction:
def __init__(self, data=None):
self.version = ""
self.inputs = []
self.outputs = []
self.lockTime = ""
self.witness = False
self.witnessScript = ""
if data is not None:
offset = 0
self.version = data[offset:offset + 4]
offset += 4
if (data[offset] == 0) and (data[offset + 1] != 0):
offset += 2
self.witness = True
inputSize = readVarint(data, offset)
offset += inputSize['size']
numInputs = inputSize['value']
for i in range(numInputs):
tmp = { 'buffer': data, 'offset' : offset}
self.inputs.append(bitcoinInput(tmp))
offset = tmp['offset']
outputSize = readVarint(data, offset)
offset += outputSize['size']
numOutputs = outputSize['value']
for i in range(numOutputs):
tmp = { 'buffer': data, 'offset' : offset}
self.outputs.append(bitcoinOutput(tmp))
offset = tmp['offset']
if self.witness:
self.witnessScript = data[offset : len(data) - 4]
self.lockTime = data[len(data) - 4:]
else:
self.lockTime = data[offset:offset + 4]
def serialize(self, skipOutputLocktime=False, skipWitness=False):
if skipWitness or (not self.witness):
useWitness = False
else:
useWitness = True
result = []
result.extend(self.version)
if useWitness:
result.append(0x00)
result.append(0x01)
writeVarint(len(self.inputs), result)
for trinput in self.inputs:
result.extend(trinput.serialize())
if not skipOutputLocktime:
writeVarint(len(self.outputs), result)
for troutput in self.outputs:
result.extend(troutput.serialize())
if useWitness:
result.extend(self.witnessScript)
result.extend(self.lockTime)
return result
def serializeOutputs(self):
result = []
writeVarint(len(self.outputs), result)
for troutput in self.outputs:
result.extend(troutput.serialize())
return result
def __str__(self):
buf = "Version : " + hexlify(self.version) + "\r\n"
index = 1
for trinput in self.inputs:
buf += "Input #" + str(index) + "\r\n"
buf += str(trinput)
index+=1
index = 1
for troutput in self.outputs:
buf += "Output #" + str(index) + "\r\n"
buf += str(troutput)
index+=1
buf += "Locktime : " + hexlify(self.lockTime) + "\r\n"
if self.witness:
buf += "Witness script : " + hexlify(self.witnessScript) + "\r\n"
return buf
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