# This file is part of the Trezor project. # # Copyright (C) 2012-2019 SatoshiLabs and contributors # # This library is free software: you can redistribute it and/or modify # it under the terms of the GNU Lesser General Public License version 3 # as published by the Free Software Foundation. # # This library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Lesser General Public License for more details. # # You should have received a copy of the License along with this library. # If not, see . from decimal import Decimal from . import exceptions, messages from .tools import expect, normalize_nfc, session def from_json(json_dict): def make_input(vin): i = messages.TxInputType() if "coinbase" in vin: i.prev_hash = b"\0" * 32 i.prev_index = 0xFFFFFFFF # signed int -1 i.script_sig = bytes.fromhex(vin["coinbase"]) i.sequence = vin["sequence"] else: i.prev_hash = bytes.fromhex(vin["txid"]) i.prev_index = vin["vout"] i.script_sig = bytes.fromhex(vin["scriptSig"]["hex"]) i.sequence = vin["sequence"] return i def make_bin_output(vout): o = messages.TxOutputBinType() o.amount = int(Decimal(vout["value"]) * (10 ** 8)) o.script_pubkey = bytes.fromhex(vout["scriptPubKey"]["hex"]) return o t = messages.TransactionType() t.version = json_dict["version"] t.lock_time = json_dict.get("locktime") t.inputs = [make_input(vin) for vin in json_dict["vin"]] t.bin_outputs = [make_bin_output(vout) for vout in json_dict["vout"]] return t @expect(messages.PublicKey) def get_public_node( client, n, ecdsa_curve_name=None, show_display=False, coin_name=None, script_type=messages.InputScriptType.SPENDADDRESS, ): return client.call( messages.GetPublicKey( address_n=n, ecdsa_curve_name=ecdsa_curve_name, show_display=show_display, coin_name=coin_name, script_type=script_type, ) ) @expect(messages.Address, field="address") def get_address( client, coin_name, n, show_display=False, multisig=None, script_type=messages.InputScriptType.SPENDADDRESS, ): return client.call( messages.GetAddress( address_n=n, coin_name=coin_name, show_display=show_display, multisig=multisig, script_type=script_type, ) ) @expect(messages.OwnershipId, field="ownership_id") def get_ownership_id( client, coin_name, n, multisig=None, script_type=messages.InputScriptType.SPENDADDRESS, ): return client.call( messages.GetOwnershipId( address_n=n, coin_name=coin_name, multisig=multisig, script_type=script_type, ) ) def get_ownership_proof( client, coin_name, n, multisig=None, script_type=messages.InputScriptType.SPENDADDRESS, user_confirmation=False, ownership_ids=None, commitment_data=None, ): res = client.call( messages.GetOwnershipProof( address_n=n, coin_name=coin_name, script_type=script_type, multisig=multisig, user_confirmation=user_confirmation, ownership_ids=ownership_ids, commitment_data=commitment_data, ) ) if not isinstance(res, messages.OwnershipProof): raise exceptions.TrezorException("Unexpected message") return res.ownership_proof, res.signature @expect(messages.MessageSignature) def sign_message( client, coin_name, n, message, script_type=messages.InputScriptType.SPENDADDRESS ): message = normalize_nfc(message) return client.call( messages.SignMessage( coin_name=coin_name, address_n=n, message=message, script_type=script_type ) ) def verify_message(client, coin_name, address, signature, message): message = normalize_nfc(message) try: resp = client.call( messages.VerifyMessage( address=address, signature=signature, message=message, coin_name=coin_name, ) ) except exceptions.TrezorFailure: return False return isinstance(resp, messages.Success) @session def sign_tx(client, coin_name, inputs, outputs, details=None, prev_txes=None): this_tx = messages.TransactionType(inputs=inputs, outputs=outputs) if details is None: signtx = messages.SignTx() else: signtx = details signtx.coin_name = coin_name signtx.inputs_count = len(inputs) signtx.outputs_count = len(outputs) res = client.call(signtx) # Prepare structure for signatures signatures = [ None if i.script_type != messages.InputScriptType.EXTERNAL else "" for i in inputs ] serialized_tx = b"" def copy_tx_meta(tx): tx_copy = messages.TransactionType(**tx) # clear fields tx_copy.inputs_cnt = len(tx.inputs) tx_copy.inputs = [] tx_copy.outputs_cnt = len(tx.bin_outputs or tx.outputs) tx_copy.outputs = [] tx_copy.bin_outputs = [] tx_copy.extra_data_len = len(tx.extra_data or b"") tx_copy.extra_data = None return tx_copy R = messages.RequestType while isinstance(res, messages.TxRequest): # If there's some part of signed transaction, let's add it if res.serialized: if res.serialized.serialized_tx: serialized_tx += res.serialized.serialized_tx if res.serialized.signature_index is not None: idx = res.serialized.signature_index sig = res.serialized.signature if signatures[idx] is not None: raise ValueError("Signature for index %d already filled" % idx) signatures[idx] = sig if res.request_type == R.TXFINISHED: break # Device asked for one more information, let's process it. if res.details.tx_hash is not None: current_tx = prev_txes[res.details.tx_hash] else: current_tx = this_tx if res.request_type == R.TXMETA: msg = copy_tx_meta(current_tx) res = client.call(messages.TxAck(tx=msg)) elif res.request_type == R.TXINPUT: msg = messages.TransactionType() msg.inputs = [current_tx.inputs[res.details.request_index]] res = client.call(messages.TxAck(tx=msg)) elif res.request_type == R.TXOUTPUT: msg = messages.TransactionType() if res.details.tx_hash: msg.bin_outputs = [current_tx.bin_outputs[res.details.request_index]] else: msg.outputs = [current_tx.outputs[res.details.request_index]] res = client.call(messages.TxAck(tx=msg)) elif res.request_type == R.TXEXTRADATA: o, l = res.details.extra_data_offset, res.details.extra_data_len msg = messages.TransactionType() msg.extra_data = current_tx.extra_data[o : o + l] res = client.call(messages.TxAck(tx=msg)) if not isinstance(res, messages.TxRequest): raise exceptions.TrezorException("Unexpected message") if None in signatures: raise exceptions.TrezorException("Some signatures are missing!") return signatures, serialized_tx