Signing Example for python_trezor

sign.py

#!/usr/bin/python
import binascii

import trezorlib.types_pb2 as proto_types

from trezorlib.client import TrezorClient
from trezorlib.tx_api import TxApiBitcoin, TxApiTestnet
from trezorlib.transport_hid import HidTransport

def main():
    # List all connected TREZORs on USB
    devices = HidTransport.enumerate()

    # Check whether we found any
    if len(devices) == 0:
        print 'No TREZOR found'
        return

    # Use first connected device
    transport = HidTransport(devices[0])

    # Creates object for manipulating TREZOR
    client = TrezorClient(transport)
#    client.set_tx_api(TxApiTestnet)
    client.set_tx_api(TxApiBitcoin)

    amount = 100000000         ### amount in satoshi, (bitcoin * 100,000,000)
    srcpath = "49'/2'/0'/0/0"  ### bip32 path of the sender address (look it up in the receive tab under the barcode).
    txid = "89e4b9883acda3325b2381ee4e9f42a12a4a3afbcad08151423b539b92c685fc"
                               ### Source Transaction ID (txid)
    outidx = 0                 ### Index in source transaction of the output to spend.

    destpath = "44'/0'/0'/0/0" ### bip32 path of destination address
    desttype = proto_types.PAYTOADDRESS  ### address type: PAYTOADDRESS or PAYTOP2SHWITNESS
    fee = 20000;               ### fee in satoshi

    # The list of inputs.
    inputs = [
        proto_types.TxInputType(
            script_type=proto_types.SPENDP2SHWITNESS,
            address_n=client.expand_path(srcpath),
            prev_hash=binascii.unhexlify(txid),
            prev_index=outidx,
            amount=amount,
        ),
    ]

    # The list of outputs.
    # An output script_type can be
    #   PAYTOADDRESS with address_n = client.expand_path("44'/...") (change)
    #   PAYTOADDRESS with address = '1...'
    #	PAYTOSCRIPTHASH with address = '3...'
    #	PAYTOMULTISIG with multisig.
    #	PAYTOOPRETURN with op_return_data.
    outputs = [
        proto_types.TxOutputType(
            amount= amount - fee,
            address_n=client.expand_path(destpath),
            script_type=desttype,
        ),
    ]
 
#    (signatures, serialized_tx) = client.sign_tx('Testnet', inputs, outputs)
    (signatures, serialized_tx) = client.sign_tx('Bitcoin', inputs, outputs)
    print 'Transaction:', binascii.hexlify(serialized_tx)

    client.close()

if __name__ == '__main__':
    main()