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382 lines
14 KiB
382 lines
14 KiB
from trezor import wire
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from trezor.crypto import hashlib
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from trezor.crypto.curve import ed25519
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from trezor.enums import TezosBallotType, TezosContractType
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from trezor.messages import TezosSignedTx
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from apps.common import paths
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from apps.common.keychain import with_slip44_keychain
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from apps.common.writers import (
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write_bytes_fixed,
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write_bytes_unchecked,
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write_uint8,
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write_uint32_be,
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)
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from . import CURVE, PATTERNS, SLIP44_ID, helpers, layout
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@with_slip44_keychain(*PATTERNS, slip44_id=SLIP44_ID, curve=CURVE)
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async def sign_tx(ctx, msg, keychain):
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await paths.validate_path(ctx, keychain, msg.address_n)
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node = keychain.derive(msg.address_n)
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if msg.transaction is not None:
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# if the transaction operation is used to execute code on a smart contract
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if msg.transaction.parameters_manager is not None:
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parameters_manager = msg.transaction.parameters_manager
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# operation to delegate from a smart contract with manager.tz
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if parameters_manager.set_delegate is not None:
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delegate = _get_address_by_tag(parameters_manager.set_delegate)
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await layout.require_confirm_delegation_baker(ctx, delegate)
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await layout.require_confirm_set_delegate(ctx, msg.transaction.fee)
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# operation to remove delegate from the smart contract with manager.tz
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elif parameters_manager.cancel_delegate is not None:
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address = _get_address_from_contract(msg.transaction.destination)
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await layout.require_confirm_delegation_manager_withdraw(ctx, address)
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await layout.require_confirm_manager_remove_delegate(
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ctx, msg.transaction.fee
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)
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# operation to transfer tokens from a smart contract to an implicit account or a smart contract
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elif parameters_manager.transfer is not None:
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to = _get_address_from_contract(parameters_manager.transfer.destination)
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await layout.require_confirm_tx(
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ctx, to, parameters_manager.transfer.amount
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)
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await layout.require_confirm_fee(
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ctx, parameters_manager.transfer.amount, msg.transaction.fee
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)
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else:
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# transactions from an implicit account
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to = _get_address_from_contract(msg.transaction.destination)
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await layout.require_confirm_tx(ctx, to, msg.transaction.amount)
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await layout.require_confirm_fee(
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ctx, msg.transaction.amount, msg.transaction.fee
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)
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elif msg.origination is not None:
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source = _get_address_by_tag(msg.origination.source)
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await layout.require_confirm_origination(ctx, source)
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# if we are immediately delegating contract
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if msg.origination.delegate is not None:
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delegate = _get_address_by_tag(msg.origination.delegate)
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await layout.require_confirm_delegation_baker(ctx, delegate)
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await layout.require_confirm_origination_fee(
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ctx, msg.origination.balance, msg.origination.fee
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)
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elif msg.delegation is not None:
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source = _get_address_by_tag(msg.delegation.source)
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delegate = None
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if msg.delegation.delegate is not None:
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delegate = _get_address_by_tag(msg.delegation.delegate)
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if delegate is not None and source != delegate:
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await layout.require_confirm_delegation_baker(ctx, delegate)
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await layout.require_confirm_set_delegate(ctx, msg.delegation.fee)
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# if account registers itself as a delegate
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else:
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await layout.require_confirm_register_delegate(
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ctx, source, msg.delegation.fee
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)
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elif msg.proposal is not None:
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proposed_protocols = [_get_protocol_hash(p) for p in msg.proposal.proposals]
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await layout.require_confirm_proposals(ctx, proposed_protocols)
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elif msg.ballot is not None:
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proposed_protocol = _get_protocol_hash(msg.ballot.proposal)
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submitted_ballot = _get_ballot(msg.ballot.ballot)
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await layout.require_confirm_ballot(ctx, proposed_protocol, submitted_ballot)
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else:
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raise wire.DataError("Invalid operation")
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w = bytearray()
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_get_operation_bytes(w, msg)
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opbytes = bytes(w)
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# watermark 0x03 is prefix for transactions, delegations, originations, reveals...
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watermark = bytes([3])
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wm_opbytes = watermark + opbytes
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wm_opbytes_hash = hashlib.blake2b(wm_opbytes, outlen=32).digest()
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signature = ed25519.sign(node.private_key(), wm_opbytes_hash)
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sig_op_contents = opbytes + signature
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sig_op_contents_hash = hashlib.blake2b(sig_op_contents, outlen=32).digest()
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ophash = helpers.base58_encode_check(sig_op_contents_hash, prefix="o")
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sig_prefixed = helpers.base58_encode_check(
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signature, prefix=helpers.TEZOS_SIGNATURE_PREFIX
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)
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return TezosSignedTx(
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signature=sig_prefixed, sig_op_contents=sig_op_contents, operation_hash=ophash
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)
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def _get_address_by_tag(address_hash):
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prefixes = ["tz1", "tz2", "tz3"]
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tag = int(address_hash[0])
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if 0 <= tag < len(prefixes):
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return helpers.base58_encode_check(address_hash[1:], prefix=prefixes[tag])
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raise wire.DataError("Invalid tag in address hash")
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def _get_address_from_contract(address):
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if address.tag == TezosContractType.Implicit:
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return _get_address_by_tag(address.hash)
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elif address.tag == TezosContractType.Originated:
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return helpers.base58_encode_check(
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address.hash[:-1], prefix=helpers.TEZOS_ORIGINATED_ADDRESS_PREFIX
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)
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raise wire.DataError("Invalid contract type")
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def _get_protocol_hash(proposal):
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return helpers.base58_encode_check(proposal, prefix="P")
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def _get_ballot(ballot):
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if ballot == TezosBallotType.Yay:
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return "yay"
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elif ballot == TezosBallotType.Nay:
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return "nay"
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elif ballot == TezosBallotType.Pass:
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return "pass"
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def _get_operation_bytes(w: bytearray, msg):
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write_bytes_fixed(w, msg.branch, helpers.BRANCH_HASH_SIZE)
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# when the account sends first operation in lifetime,
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# we need to reveal its public key
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if msg.reveal is not None:
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_encode_common(w, msg.reveal, "reveal")
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tag = int(msg.reveal.public_key[0])
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try:
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public_key_size = helpers.PUBLIC_KEY_TAG_TO_SIZE[tag]
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except KeyError:
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raise wire.DataError("Invalid tag in public key")
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write_bytes_fixed(w, msg.reveal.public_key, 1 + public_key_size)
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# transaction operation
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if msg.transaction is not None:
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_encode_common(w, msg.transaction, "transaction")
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_encode_zarith(w, msg.transaction.amount)
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_encode_contract_id(w, msg.transaction.destination)
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# support delegation and transfer from the old scriptless contracts (now with manager.tz script)
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if msg.transaction.parameters_manager is not None:
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parameters_manager = msg.transaction.parameters_manager
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if parameters_manager.set_delegate is not None:
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_encode_manager_delegation(w, parameters_manager.set_delegate)
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elif parameters_manager.cancel_delegate is not None:
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_encode_manager_delegation_remove(w)
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elif parameters_manager.transfer is not None:
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if (
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parameters_manager.transfer.destination.tag
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== TezosContractType.Implicit
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):
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_encode_manager_to_implicit_transfer(w, parameters_manager.transfer)
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else:
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_encode_manager_to_manager_transfer(w, parameters_manager.transfer)
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else:
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if msg.transaction.parameters:
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helpers.write_bool(w, True)
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helpers.check_tx_params_size(msg.transaction.parameters)
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write_bytes_unchecked(w, msg.transaction.parameters)
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else:
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helpers.write_bool(w, False)
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# origination operation
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elif msg.origination is not None:
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_encode_common(w, msg.origination, "origination")
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_encode_zarith(w, msg.origination.balance)
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_encode_data_with_bool_prefix(
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w, msg.origination.delegate, helpers.TAGGED_PUBKEY_HASH_SIZE
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)
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helpers.check_script_size(msg.origination.script)
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write_bytes_unchecked(w, msg.origination.script)
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# delegation operation
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elif msg.delegation is not None:
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_encode_common(w, msg.delegation, "delegation")
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_encode_data_with_bool_prefix(
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w, msg.delegation.delegate, helpers.TAGGED_PUBKEY_HASH_SIZE
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)
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elif msg.proposal is not None:
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_encode_proposal(w, msg.proposal)
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elif msg.ballot is not None:
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_encode_ballot(w, msg.ballot)
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def _encode_common(w: bytearray, operation, str_operation):
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operation_tags = {
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"reveal": helpers.OP_TAG_REVEAL,
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"transaction": helpers.OP_TAG_TRANSACTION,
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"origination": helpers.OP_TAG_ORIGINATION,
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"delegation": helpers.OP_TAG_DELEGATION,
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}
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write_uint8(w, operation_tags[str_operation])
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write_bytes_fixed(w, operation.source, helpers.TAGGED_PUBKEY_HASH_SIZE)
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_encode_zarith(w, operation.fee)
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_encode_zarith(w, operation.counter)
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_encode_zarith(w, operation.gas_limit)
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_encode_zarith(w, operation.storage_limit)
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def _encode_contract_id(w: bytearray, contract_id):
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write_uint8(w, contract_id.tag)
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write_bytes_fixed(w, contract_id.hash, helpers.CONTRACT_ID_SIZE - 1)
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def _encode_data_with_bool_prefix(w: bytearray, data: bytes, expected_length: int):
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if data:
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helpers.write_bool(w, True)
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write_bytes_fixed(w, data, expected_length)
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else:
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helpers.write_bool(w, False)
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def _encode_zarith(w: bytearray, num):
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while True:
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byte = num & 127
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num = num >> 7
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if num == 0:
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write_uint8(w, byte)
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break
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write_uint8(w, 128 | byte)
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def _encode_proposal(w: bytearray, proposal):
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write_uint8(w, helpers.OP_TAG_PROPOSALS)
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write_bytes_fixed(w, proposal.source, helpers.TAGGED_PUBKEY_HASH_SIZE)
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write_uint32_be(w, proposal.period)
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write_uint32_be(w, len(proposal.proposals) * helpers.PROPOSAL_HASH_SIZE)
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for proposal_hash in proposal.proposals:
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write_bytes_fixed(w, proposal_hash, helpers.PROPOSAL_HASH_SIZE)
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def _encode_ballot(w: bytearray, ballot):
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write_uint8(w, helpers.OP_TAG_BALLOT)
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write_bytes_fixed(w, ballot.source, helpers.TAGGED_PUBKEY_HASH_SIZE)
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write_uint32_be(w, ballot.period)
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write_bytes_fixed(w, ballot.proposal, helpers.PROPOSAL_HASH_SIZE)
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write_uint8(w, ballot.ballot)
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def _encode_natural(w: bytearray, num):
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# encode a natural integer with its signed bit on position 7
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# as we do not expect negative numbers in a transfer operation the bit is never set
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natural_tag = 0
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write_uint8(w, natural_tag)
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byte = num & 63
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modified = num >> 6
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if modified == 0:
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write_uint8(w, byte)
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else:
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write_uint8(w, 128 | byte)
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_encode_zarith(w, modified)
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def _encode_manager_common(w: bytearray, sequence_length, operation, to_contract=False):
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# 5 = tag and sequence_length (1 byte + 4 bytes)
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argument_length = sequence_length + 5
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helpers.write_bool(w, True)
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write_uint8(w, helpers.DO_ENTRYPOINT_TAG)
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write_uint32_be(w, argument_length)
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write_uint8(w, helpers.MICHELSON_SEQUENCE_TAG)
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write_uint32_be(w, sequence_length)
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helpers.write_instruction(w, "DROP")
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helpers.write_instruction(w, "NIL")
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helpers.write_instruction(w, "operation")
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helpers.write_instruction(w, operation)
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if to_contract is True:
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helpers.write_instruction(w, "address")
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else:
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helpers.write_instruction(w, "key_hash")
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if operation == "PUSH":
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write_uint8(w, 10) # byte sequence
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if to_contract is True:
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write_uint32_be(w, helpers.CONTRACT_ID_SIZE)
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else:
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write_uint32_be(w, helpers.TAGGED_PUBKEY_HASH_SIZE)
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def _encode_manager_to_implicit_transfer(w: bytearray, manager_transfer):
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MICHELSON_LENGTH = 48
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value_natural = bytearray()
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_encode_natural(value_natural, manager_transfer.amount)
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sequence_length = MICHELSON_LENGTH + len(value_natural)
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_encode_manager_common(w, sequence_length, "PUSH")
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write_bytes_fixed(
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w, manager_transfer.destination.hash, helpers.TAGGED_PUBKEY_HASH_SIZE
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)
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helpers.write_instruction(w, "IMPLICIT_ACCOUNT")
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helpers.write_instruction(w, "PUSH")
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helpers.write_instruction(w, "mutez")
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_encode_natural(w, manager_transfer.amount)
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helpers.write_instruction(w, "UNIT")
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helpers.write_instruction(w, "TRANSFER_TOKENS")
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helpers.write_instruction(w, "CONS")
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# smart_contract_delegation
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def _encode_manager_delegation(w: bytearray, delegate):
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MICHELSON_LENGTH = 42 # length is fixed this time(no variable length fields)
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_encode_manager_common(w, MICHELSON_LENGTH, "PUSH")
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write_bytes_fixed(w, delegate, helpers.TAGGED_PUBKEY_HASH_SIZE)
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helpers.write_instruction(w, "SOME")
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helpers.write_instruction(w, "SET_DELEGATE")
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helpers.write_instruction(w, "CONS")
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def _encode_manager_delegation_remove(w: bytearray):
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MICHELSON_LENGTH = 14 # length is fixed this time(no variable length fields)
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_encode_manager_common(w, MICHELSON_LENGTH, "NONE")
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helpers.write_instruction(w, "SET_DELEGATE")
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helpers.write_instruction(w, "CONS")
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def _encode_manager_to_manager_transfer(w: bytearray, manager_transfer):
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MICHELSON_LENGTH = 77
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value_natural = bytearray()
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_encode_natural(value_natural, manager_transfer.amount)
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sequence_length = MICHELSON_LENGTH + len(value_natural)
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_encode_manager_common(w, sequence_length, "PUSH", to_contract=True)
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_encode_contract_id(w, manager_transfer.destination)
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helpers.write_instruction(w, "CONTRACT")
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helpers.write_instruction(w, "unit")
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helpers.write_instruction(w, "ASSERT_SOME")
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helpers.write_instruction(w, "PUSH")
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helpers.write_instruction(w, "mutez")
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_encode_natural(w, manager_transfer.amount)
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helpers.write_instruction(w, "UNIT")
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helpers.write_instruction(w, "TRANSFER_TOKENS")
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helpers.write_instruction(w, "CONS")
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