171 lines
6.4 KiB
Python
171 lines
6.4 KiB
Python
#!/usr/bin/env python
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"""
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*******************************************************************************
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* Ledger Blue
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* (c) 2016 Ledger
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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********************************************************************************
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"""
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from ledgerblue.comm import getDongle
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from ledgerblue.commException import CommException
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import argparse
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import struct
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import requests
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import json
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from decimal import Decimal
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from ethereum.transactions import Transaction, UnsignedTransaction
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from rlp import encode
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from rlp.utils import decode_hex, encode_hex, str_to_bytes
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from ethereum import utils
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# https://etherscan.io/address/0x5dc8108fc79018113a58328f5283b376b83922ef#code
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SPLIT_CONTRACT_FUNCTION = decode_hex("9c709343")
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SPLIT_CONTRACT_ADDRESS = "5dc8108fc79018113a58328f5283b376b83922ef"
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def rpc_call(http, url, methodDebug):
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req = http.get(url)
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if req.status_code == 200:
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result = json.loads(req.text)
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if 'error' in result:
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raise Exception("Server error " + methodDebug + " " + result['error']['message'])
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return result
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else:
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raise Exception("Server error - " + methodDebug + " got status " + req.status)
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def parse_bip32_path(path):
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if len(path) == 0:
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return ""
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result = ""
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elements = path.split('/')
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for pathElement in elements:
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element = pathElement.split('\'')
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if len(element) == 1:
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result = result + struct.pack(">I", int(element[0]))
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else:
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result = result + struct.pack(">I", 0x80000000 | int(element[0]))
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return result
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parser = argparse.ArgumentParser()
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parser.add_argument('--nonce', help="Nonce associated to the account (default : query account)")
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parser.add_argument('--gasprice', help="Network gas price (default : query network)")
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parser.add_argument('--startgas', help="startgas", default='80000')
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parser.add_argument('--startgas-delta', help="difference applied to startgas if gasprice is automatically fetched", default='1000')
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parser.add_argument('--amount', help="Amount to send in ether (default : query amount, use maximum)")
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parser.add_argument('--to', help="BIP 32 destination path (default : default ETC path)")
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parser.add_argument('--split-to-eth', help="Split to the ETH chain (default : spit to ETC chain)", action='store_true')
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parser.add_argument('--path', help="BIP 32 path to sign with (default : default ETH path)")
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parser.add_argument('--broadcast', help="Broadcast generated transaction (default : false)", action='store_true')
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args = parser.parse_args()
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if args.path == None:
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if args.split_to_eth: #sign from ETC
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#args.path = "44'/60'/160720'/0'/0"
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args.path = "44'/60'/0'/0"
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else: #sign from ETH
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args.path = "44'/60'/0'/0"
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if args.to == None:
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if args.split_to_eth: #target ETH
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args.to = "44'/60'/0'/0"
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else: #target ETC transitional
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args.to = "44'/60'/160720'/0'/0"
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dongle = getDongle(True)
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donglePath = parse_bip32_path(args.to)
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apdu = "e0060000".decode('hex') + chr(len(donglePath) + 1) + chr(len(donglePath) / 4) + donglePath
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dongle.exchange(bytes(apdu))
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apdu = "e0020000".decode('hex') + chr(len(donglePath) + 1) + chr(len(donglePath) / 4) + donglePath
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result = dongle.exchange(bytes(apdu))
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publicKey = str(result[1 : 1 + result[0]])
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encodedPublicKey = utils.sha3(publicKey[1:])[12:]
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if (args.nonce == None) or (args.amount == None):
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donglePathFrom = parse_bip32_path(args.path)
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apdu = "e0020000".decode('hex') + chr(len(donglePathFrom) + 1) + chr(len(donglePathFrom) / 4) + donglePathFrom
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result = dongle.exchange(bytes(apdu))
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publicKeyFrom = str(result[1 : 1 + result[0]])
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encodedPublicKeyFrom = utils.sha3(publicKeyFrom[1:])[12:]
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http = None
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if (args.gasprice == None) or (args.nonce == None) or (args.amount == None) or (args.broadcast):
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http = requests.session()
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if args.gasprice == None:
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print "Fetching gas price"
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result = rpc_call(http, "https://api.etherscan.io/api?module=proxy&action=eth_gasPrice", "gasPrice")
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args.gasprice = int(result['result'], 16)
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print "Gas price " + str(args.gasprice)
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if args.nonce == None:
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print "Fetching nonce"
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result = rpc_call(http, "https://api.etherscan.io/api?module=proxy&action=eth_getTransactionCount&address=0x" + encodedPublicKeyFrom.encode('hex'), "getTransactionCount")
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args.nonce = int(result['result'], 16)
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print "Nonce for 0x" + encodedPublicKeyFrom.encode('hex') + " " + str(args.nonce)
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if args.amount == None:
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print "Fetching balance"
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result = rpc_call(http, "https://api.etherscan.io/api?module=account&action=balance&address=0x" + encodedPublicKeyFrom.encode('hex'), "getBalance")
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amount = int(result['result'])
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print "Balance for " + encodedPublicKeyFrom.encode('hex') + " " + str(amount)
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amount -= (int(args.startgas) - int(args.startgas_delta)) * int(args.gasprice)
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if amount < 0:
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raise Exception("Remaining amount too small to pay for contract fees")
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else:
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amount = Decimal(args.amount) * 10**18
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print "Amount transferred " + str((Decimal(amount) / 10 ** 18)) + " to " + encodedPublicKey.encode('hex')
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txData = SPLIT_CONTRACT_FUNCTION
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txData += "\x00" * 31
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if (args.split_to_eth):
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txData += "\x01"
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else:
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txData += "\x00"
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txData += "\x00" * 12
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txData += encodedPublicKey
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tx = Transaction(
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nonce=int(args.nonce),
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gasprice=int(args.gasprice),
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startgas=int(args.startgas),
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to=decode_hex(SPLIT_CONTRACT_ADDRESS),
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value=int(amount),
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data=txData
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)
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encodedTx = encode(tx, UnsignedTransaction)
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donglePath = parse_bip32_path(args.path)
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apdu = "e0040000".decode('hex') + chr(len(donglePath) + 1 + len(encodedTx)) + chr(len(donglePath) / 4) + donglePath + encodedTx
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result = dongle.exchange(bytes(apdu))
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v = result[0]
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r = int(str(result[1:1 + 32]).encode('hex'), 16)
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s = int(str(result[1 + 32: 1 + 32 + 32]).encode('hex'), 16)
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tx = Transaction(tx.nonce, tx.gasprice, tx.startgas, tx.to, tx.value, tx.data, v, r, s)
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serializedTx = encode(tx)
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print "Signed transaction " + serializedTx.encode('hex')
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if (args.broadcast):
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result = rpc_call(http, "https://api.etherscan.io/api?module=proxy&action=eth_sendRawTransaction&hex=0x" + serializedTx.encode('hex'), "sendRawTransaction")
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print result
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