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splitEther.py
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#!/usr/bin/env python
"""
*******************************************************************************
* Ledger Blue
* (c) 2016 Ledger
*
* 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 ledgerblue.comm import getDongle
from ledgerblue.commException import CommException
import argparse
import struct
import requests
import json
from decimal import Decimal
from rlp import encode
from rlp.utils import decode_hex, encode_hex, str_to_bytes
from ethBase import Transaction, UnsignedTransaction, sha3
# https://etherscan.io/address/0x5dc8108fc79018113a58328f5283b376b83922ef#code
SPLIT_CONTRACT_FUNCTION = decode_hex("9c709343")
SPLIT_CONTRACT_ADDRESS = "5dc8108fc79018113a58328f5283b376b83922ef"
def rpc_call(http, url, methodDebug):
req = http.get(url)
if req.status_code == 200:
result = json.loads(req.text)
if 'error' in result:
raise Exception("Server error - " + methodDebug + " - " + result['error']['message'])
return result
else:
raise Exception("Server error - " + methodDebug + " got status " + req.status)
def parse_bip32_path(path):
if len(path) == 0:
return ""
result = ""
elements = path.split('/')
for pathElement in elements:
element = pathElement.split('\'')
if len(element) == 1:
result = result + struct.pack(">I", int(element[0]))
else:
result = result + struct.pack(">I", 0x80000000 | int(element[0]))
return result
parser = argparse.ArgumentParser()
parser.add_argument('--nonce', help="Nonce associated to the account (default : query account)")
parser.add_argument('--gasprice', help="Network gas price (default : query network)")
parser.add_argument('--startgas', help="startgas", default='80000')
parser.add_argument('--startgas-delta', help="difference applied to startgas if gasprice is automatically fetched", default='1000')
parser.add_argument('--amount', help="Amount to send in ether (default : query amount, use maximum)")
parser.add_argument('--to', help="BIP 32 destination path (default : default ETC path)")
parser.add_argument('--split-to-eth', help="Split to the ETH chain (default : spit to ETC chain)", action='store_true')
parser.add_argument('--path', help="BIP 32 path to sign with (default : default ETH path)")
parser.add_argument('--broadcast', help="Broadcast generated transaction (default : false)", action='store_true')
args = parser.parse_args()
if args.path == None:
if args.split_to_eth: #sign from ETC
#args.path = "44'/60'/160720'/0'/0"
args.path = "44'/60'/0'/0"
else: #sign from ETH
args.path = "44'/60'/0'/0"
if args.to == None:
if args.split_to_eth: #target ETH
args.to = "44'/60'/0'/0"
else: #target ETC transitional
args.to = "44'/60'/160720'/0'/0"
dongle = getDongle(True)
donglePath = parse_bip32_path(args.to)
apdu = "e0060000".decode('hex') + chr(len(donglePath) + 1) + chr(len(donglePath) / 4) + donglePath
dongle.exchange(bytes(apdu))
apdu = "e0020000".decode('hex') + chr(len(donglePath) + 1) + chr(len(donglePath) / 4) + donglePath
result = dongle.exchange(bytes(apdu))
publicKey = str(result[1 : 1 + result[0]])
encodedPublicKey = sha3(publicKey[1:])[12:]
if (args.nonce == None) or (args.amount == None):
donglePathFrom = parse_bip32_path(args.path)
apdu = "e0020000".decode('hex') + chr(len(donglePathFrom) + 1) + chr(len(donglePathFrom) / 4) + donglePathFrom
result = dongle.exchange(bytes(apdu))
publicKeyFrom = str(result[1 : 1 + result[0]])
encodedPublicKeyFrom = sha3(publicKeyFrom[1:])[12:]
http = None
if (args.gasprice == None) or (args.nonce == None) or (args.amount == None) or (args.broadcast):
http = requests.session()
if args.gasprice == None:
print "Fetching gas price"
result = rpc_call(http, "https://api.etherscan.io/api?module=proxy&action=eth_gasPrice", "gasPrice")
args.gasprice = int(result['result'], 16)
print "Gas price " + str(args.gasprice)
if args.nonce == None:
print "Fetching nonce"
result = rpc_call(http, "https://api.etherscan.io/api?module=proxy&action=eth_getTransactionCount&address=0x" + encodedPublicKeyFrom.encode('hex'), "getTransactionCount")
args.nonce = int(result['result'], 16)
print "Nonce for 0x" + encodedPublicKeyFrom.encode('hex') + " " + str(args.nonce)
if args.amount == None:
print "Fetching balance"
result = rpc_call(http, "https://api.etherscan.io/api?module=account&action=balance&address=0x" + encodedPublicKeyFrom.encode('hex'), "getBalance")
amount = int(result['result'])
print "Balance for " + encodedPublicKeyFrom.encode('hex') + " " + str(amount)
amount -= (int(args.startgas) - int(args.startgas_delta)) * int(args.gasprice)
if amount < 0:
raise Exception("Remaining amount too small to pay for contract fees")
else:
amount = Decimal(args.amount) * 10**18
print "Amount transferred " + str((Decimal(amount) / 10 ** 18)) + " to " + encodedPublicKey.encode('hex')
txData = SPLIT_CONTRACT_FUNCTION
txData += "\x00" * 31
if (args.split_to_eth):
txData += "\x01"
else:
txData += "\x00"
txData += "\x00" * 12
txData += encodedPublicKey
tx = Transaction(
nonce=int(args.nonce),
gasprice=int(args.gasprice),
startgas=int(args.startgas),
to=decode_hex(SPLIT_CONTRACT_ADDRESS),
value=int(amount),
data=txData
)
encodedTx = encode(tx, UnsignedTransaction)
donglePath = parse_bip32_path(args.path)
apdu = "e0040000".decode('hex') + chr(len(donglePath) + 1 + len(encodedTx)) + chr(len(donglePath) / 4) + donglePath + encodedTx
result = dongle.exchange(bytes(apdu))
v = result[0]
r = int(str(result[1:1 + 32]).encode('hex'), 16)
s = int(str(result[1 + 32: 1 + 32 + 32]).encode('hex'), 16)
tx = Transaction(tx.nonce, tx.gasprice, tx.startgas, tx.to, tx.value, tx.data, v, r, s)
serializedTx = encode(tx)
print "Signed transaction " + serializedTx.encode('hex')
if (args.broadcast):
result = rpc_call(http, "https://api.etherscan.io/api?module=proxy&action=eth_sendRawTransaction&hex=0x" + serializedTx.encode('hex'), "sendRawTransaction")
print result