Create a Litecoin Multisig Transaction

by Lennart Jongeneel
in BitcoinLib

tagged litecoin, multisig, bitcoinlib, commandline wallets, manual

This guide assumes you created a Litecoin 2-of-3 wallet following the previous article.

We will create a Litecoin multisig transaction using the command line wallet from Python BitcoinLib with the online main wallet and an offline wallet.

Litecoin Multisig Transaction

Create transaction with online wallet

First update your wallet and unspent transaction outputs:

$ clw LitecoinMS-on -x
Command Line Wallet - BitcoinLib 0.4.11

Wallet info for LitecoinMS-on
=== WALLET ===
 ID                             39
 Name                           LitecoinMS-on
 Owner
 Scheme                         bip32
 Multisig                       True
 Multisig Wallet IDs            40, 41, 42
 Cosigner ID                    0
 Witness type                   legacy
 Main network                   litecoin
 Latest update                  2019-11-14 22:57:24.785464

= Multisig Public Master Keys =
    0 261 Ltub2VECoJe5hBU8kNinfTfFsyPz5qfDMiFhPmmWi89yMBGJH9MtjZk6zmhcmvg8FXm3ZBDRibocbSfFzGaczfrUjWT4ZsXNhbCchwr48MZgXyS bip32  main     *
    1 266 Ltub2UpT1zg3aS9mgDSoxF1KxXTFWQWJdySpgtQ8WMRX7pFX7BXfshnMjRP4LqApSVETddt6B9NBnjW4XqhWPprZXKfKk9oWEmUV8MsoVZ3EW5f bip32  cosigner
    2 270 Ltub2V3tPynSv6pHv8tjXE3chMuDNybh1DmQXuKQ9bALUZ1Zw811u9PFS6QyEcKrC72PmK8rSyb1mv1mRHjTt22UrtmsP1hmrvTWz4vdPDZMUvR bip32  cosigner
For main keys a private master key is available in this wallet to sign transactions. * cosigner key for this wallet

- NETWORK: litecoin -
- - Keys
  280 m/45'/0/0/0                  MFvNqhAWJY58yjLAME5V6ppivh9iVJJ6TH            Multisig Key 276/265/279             0.03266639 LTC

- - Transactions (Account 0, Ltub2SSUS19CirucWsPQ8ekikRQ5BKr3FiQBfPUHoW4p9LP9MT7ifG5HBJvR3kkowxFm8aXiMSXXgRQfZHVGQCDWyMnBvnsDUzMkKT9eBQnt1nk)
  10 9a9b4c9c9decefd50b7f40c3a243bbd514a18958cda70aa4fe9f82e0726e4d2f   MFvNqhAWJY58yjLAME5V6ppivh9iVJJ6TH        1       3266639 U

= Balance Totals (includes unconfirmed) =
litecoin             (Account 0)                0.03266639 LTC

If unspent transaction outputs are found you can create a transaction. We create a transaction to send 0.01 LTC to another address.

$ clw LitecoinMS-on -t LgaczM5X63xd7QNnKrLjLK4rhrSQqfxuKv 1000000
Command Line Wallet for BitcoinLib

Transaction created
Transaction
Date: None
Network: litecoin
Status: new
Verified: False
Inputs
- MFvNqhAWJY58yjLAME5V6ppivh9iVJJ6TH 3266639 9a9b4c9c9decefd50b7f40c3a243bbd514a18958cda70aa4fe9f82e0726e4d2f 0
  Script type: p2sh_multisig, signatures: 1 (2 of 3)
Outputs
- LgaczM5X63xd7QNnKrLjLK4rhrSQqfxuKv 1000000
- 3LPmJ7DLR9v4ax6cSdPtgMB9jh7CDQ4Y64 2209347
Fee: 57292
Confirmations: None
Pushed to network: False
Wallet: LitecoinMS-on

Transaction created but not send yet. Transaction dictionary for export:
{'fee': 57292,
 'inputs': [{'address': 'MFvNqhAWJY58yjLAME5V6ppivh9iVJJ6TH',
             'output_n': 0,
             'prev_hash': '9a9b4c9c9decefd50b7f40c3a243bbd514a18958cda70aa4fe9f82e0726e4d2f',
             'signatures': [{'pub_key': '0364170e13312e6a2a867ce65e868a5539d53ed79017943f95059a2525fef5bb0f',
                             'sig_der': '304502210091ddefdd9b18e036b0fe930a395914522f189c812c40fbbfbfe0d9936e645bfb022064c29a3fb85f0fac6ae0debeff410aca8c310c339def1ffa0e47b63a68b89f1a',
                             'signature': '91ddefdd9b18e036b0fe930a395914522f189c812c40fbbfbfe0d9936e645bfb64c29a3fb85f0fac6ae0debeff410aca8c310c339def1ffa0e47b63a68b89f1a'}],
             'value': 3266639}],
 'network': 'litecoin',
 'outputs': [{'address': 'LgaczM5X63xd7QNnKrLjLK4rhrSQqfxuKv',
              'value': 1000000},
             {'address': '3LPmJ7DLR9v4ax6cSdPtgMB9jh7CDQ4Y64',
              'value': 2209347}],
 'raw': '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'
}

The commandline wallet outputs the transaction in human readable format and as a Python dictionary. The transaction does not verify yet because it is only signed by 1 signature and it needs 2.

Now save the Python dictionary to a USB stick in text format and name it 'tx_dict.txt'.

Sign transaction with offline wallet

Go to the offline device to sign the transaction with the second key. Use the following command to import the freshly transaction dictionary.

$ clw LitecoinMS -a <path-to-usb-stick>/tx_dict.txt
Command Line Wallet for BitcoinLib

Transaction
Date: None
Network: litecoin
Status: new
Verified: True
Inputs
- MFvNqhAWJY58yjLAME5V6ppivh9iVJJ6TH 3266639 9a9b4c9c9decefd50b7f40c3a243bbd514a18958cda70aa4fe9f82e0726e4d2f 0
  Script type: p2sh_multisig, signatures: 2 (2 of 3)
Outputs
- LgaczM5X63xd7QNnKrLjLK4rhrSQqfxuKv 1000000
- 3LPmJ7DLR9v4ax6cSdPtgMB9jh7CDQ4Y64 2209347
Fee: 57292
Confirmations: None
Pushed to network: False
Wallet: LitecoinMS
Signed transaction:
{'fee': 57292,
 'inputs': [{'address': 'MFvNqhAWJY58yjLAME5V6ppivh9iVJJ6TH',
             'output_n': 0,
             'prev_hash': '9a9b4c9c9decefd50b7f40c3a243bbd514a18958cda70aa4fe9f82e0726e4d2f',
             'signatures': [{'pub_key': '0364170e13312e6a2a867ce65e868a5539d53ed79017943f95059a2525fef5bb0f',
                             'sig_der': '304502210091ddefdd9b18e036b0fe930a395914522f189c812c40fbbfbfe0d9936e645bfb022064c29a3fb85f0fac6ae0debeff410aca8c310c339def1ffa0e47b63a68b89f1a',
                             'signature': '91ddefdd9b18e036b0fe930a395914522f189c812c40fbbfbfe0d9936e645bfb64c29a3fb85f0fac6ae0debeff410aca8c310c339def1ffa0e47b63a68b89f1a'},
                            {'pub_key': '038de68940ee5bf5c3004c940768155338f0fd404049ecd5760219e7386726b97f',
                             'sig_der': '3045022100ed4f1c06fecc53df9b36dd54a79d5b8764f147fc5538f707df6c4a6afd3070390220419311e194d9e42984f8c4ec246f12e587b9f9e67caaf417ad51c7a23a6bf52e',
                             'signature': 'ed4f1c06fecc53df9b36dd54a79d5b8764f147fc5538f707df6c4a6afd307039419311e194d9e42984f8c4ec246f12e587b9f9e67caaf417ad51c7a23a6bf52e'}],
             'value': 3266639}],
 'network': 'litecoin',
 'outputs': [{'address': 'LgaczM5X63xd7QNnKrLjLK4rhrSQqfxuKv',
              'value': 1000000},
             {'address': '3LPmJ7DLR9v4ax6cSdPtgMB9jh7CDQ4Y64',
              'value': 2209347}],
 'raw': '01000000012f4d6e72e0829ffea40aa7cd5889a114d5bb43a2c3407f0bd5efec9d9c4c9b9a00000000fdfe000048304502210091ddefdd9b18e036b0fe930a395914522f189c812c40fbbfbfe0d9936e645bfb022064c29a3fb85f0fac6ae0debeff410aca8c310c339def1ffa0e47b63a68b89f1a01483045022100ed4f1c06fecc53df9b36dd54a79d5b8764f147fc5538f707df6c4a6afd3070390220419311e194d9e42984f8c4ec246f12e587b9f9e67caaf417ad51c7a23a6bf52e014c6952210364170e13312e6a2a867ce65e868a5539d53ed79017943f95059a2525fef5bb0f21038de68940ee5bf5c3004c940768155338f0fd404049ecd5760219e7386726b97f2103ddd8009546aa3300d97cd6d49be227be78095ac72b05af8fe77490fd2091ce3f53aeffffffff0240420f00000000001976a914ea4349b431766be64c1c5015afd865e267d77a6988ac43b621000000000017a914cd271b873341f5364c9eb0217b5255be25f11cf98700000000'}

This will create a signed transaction and as you can see now it is verified and ready to send.

But before you continue please check if the transaction is the same as the original transaction. Besides software or human mistakes it is a possibility someone hacks into your online PC and change the transaction so it sends outputs to another address.

Send transaction

Copy the transaction dictionary (or just the 'raw' part) to the USB stick. You can send the transaction with any online transaction broadcast service, but below we will explain how to send it with your online wallet. This way your online wallet is updated as well.

To send the transaction import the transaction in your online wallet. You could import it without the 'push' option first to double check the transaction.

To broadcast your transaction to the network import the raw transaction and push.

$ clw LitecoinMS -p -i 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