core/bitcoin: Move script types from helpers to common.

core/src/apps/bitcoin/common.py

@@ -3,14 +3,48 @@ from micropython import const
 from trezor import wire
 from trezor.crypto import bech32, bip32, der
 from trezor.crypto.curve import secp256k1
+from trezor.messages import InputScriptType, OutputScriptType
 from trezor.utils import ensure
 
 if False:
     from apps.common.coininfo import CoinInfo
+    from typing import Dict
+    from trezor.messages.TxInputType import EnumTypeInputScriptType
+    from trezor.messages.TxOutputType import EnumTypeOutputScriptType
 
 # supported witness version for bech32 addresses
 _BECH32_WITVER = const(0x00)
 
+MULTISIG_INPUT_SCRIPT_TYPES = (
+    InputScriptType.SPENDMULTISIG,
+    InputScriptType.SPENDP2SHWITNESS,
+    InputScriptType.SPENDWITNESS,
+)
+MULTISIG_OUTPUT_SCRIPT_TYPES = (
+    OutputScriptType.PAYTOMULTISIG,
+    OutputScriptType.PAYTOP2SHWITNESS,
+    OutputScriptType.PAYTOWITNESS,
+)
+
+CHANGE_OUTPUT_TO_INPUT_SCRIPT_TYPES = {
+    OutputScriptType.PAYTOADDRESS: InputScriptType.SPENDADDRESS,
+    OutputScriptType.PAYTOMULTISIG: InputScriptType.SPENDMULTISIG,
+    OutputScriptType.PAYTOP2SHWITNESS: InputScriptType.SPENDP2SHWITNESS,
+    OutputScriptType.PAYTOWITNESS: InputScriptType.SPENDWITNESS,
+}  # type: Dict[EnumTypeOutputScriptType, EnumTypeInputScriptType]
+INTERNAL_INPUT_SCRIPT_TYPES = tuple(CHANGE_OUTPUT_TO_INPUT_SCRIPT_TYPES.values())
+CHANGE_OUTPUT_SCRIPT_TYPES = tuple(CHANGE_OUTPUT_TO_INPUT_SCRIPT_TYPES.keys())
+
+SEGWIT_INPUT_SCRIPT_TYPES = (
+    InputScriptType.SPENDP2SHWITNESS,
+    InputScriptType.SPENDWITNESS,
+)
+
+NONSEGWIT_INPUT_SCRIPT_TYPES = (
+    InputScriptType.SPENDADDRESS,
+    InputScriptType.SPENDMULTISIG,
+)
+
 
 def ecdsa_sign(node: bip32.HDNode, digest: bytes) -> bytes:
     sig = secp256k1.sign(node.private_key(), digest)
@@ -29,7 +63,7 @@ def ecdsa_hash_pubkey(pubkey: bytes, coin: CoinInfo) -> bytes:
     return coin.script_hash(pubkey)
 
 
-def encode_bech32_address(prefix: str, script: bytes) -> bytes:
+def encode_bech32_address(prefix: str, script: bytes) -> str:
     address = bech32.encode(prefix, _BECH32_WITVER, script)
     if address is None:
         raise wire.ProcessError("Invalid address")

core/src/apps/bitcoin/sign_tx/bitcoin.py

@@ -17,7 +17,7 @@ from trezor.utils import HashWriter, ensure
 from apps.common import coininfo, seed
 from apps.common.writers import write_bitcoin_varint
 
-from .. import addresses, multisig, scripts, writers
+from .. import addresses, common, multisig, scripts, writers
 from ..common import ecdsa_hash_pubkey, ecdsa_sign
 from . import helpers, progress, tx_weight
 from .matchcheck import MultisigFingerprintChecker, WalletPathChecker
@@ -177,7 +177,7 @@ class Bitcoin:
         if not addresses.validate_full_path(txi.address_n, self.coin, txi.script_type):
             await helpers.confirm_foreign_address(txi.address_n)
 
-        if txi.script_type not in helpers.INTERNAL_INPUT_SCRIPT_TYPES:
+        if txi.script_type not in common.INTERNAL_INPUT_SCRIPT_TYPES:
             raise wire.DataError("Wrong input script type")
 
         prev_amount, script_pubkey = await self.get_prevtx_output(
@@ -436,7 +436,7 @@ class Bitcoin:
         if txo.address_n:
             # change output
             try:
-                input_script_type = helpers.CHANGE_OUTPUT_TO_INPUT_SCRIPT_TYPES[
+                input_script_type = common.CHANGE_OUTPUT_TO_INPUT_SCRIPT_TYPES[
                     txo.script_type
                 ]
             except KeyError:
@@ -449,7 +449,7 @@ class Bitcoin:
         return scripts.output_derive_script(txo.address, self.coin)
 
     def output_is_change(self, txo: TxOutputType) -> bool:
-        if txo.script_type not in helpers.CHANGE_OUTPUT_SCRIPT_TYPES:
+        if txo.script_type not in common.CHANGE_OUTPUT_SCRIPT_TYPES:
             return False
         if txo.multisig and not self.multisig_fingerprint.output_matches(txo):
             return False
@@ -536,8 +536,8 @@ class Bitcoin:
 
 
 def input_is_segwit(txi: TxInputType) -> bool:
-    return txi.script_type in helpers.SEGWIT_INPUT_SCRIPT_TYPES
+    return txi.script_type in common.SEGWIT_INPUT_SCRIPT_TYPES
 
 
 def input_is_nonsegwit(txi: TxInputType) -> bool:
-    return txi.script_type in helpers.NONSEGWIT_INPUT_SCRIPT_TYPES
+    return txi.script_type in common.NONSEGWIT_INPUT_SCRIPT_TYPES

core/src/apps/bitcoin/sign_tx/helpers.py

@@ -18,42 +18,12 @@ from trezor.messages.TxRequest import TxRequest
 
 from apps.common.coininfo import CoinInfo
 
+from .. import common
 from ..writers import TX_HASH_SIZE
 
 if False:
-    from typing import Any, Awaitable, Dict
-    from trezor.messages.TxInputType import EnumTypeInputScriptType
-    from trezor.messages.TxOutputType import EnumTypeOutputScriptType
-
-MULTISIG_INPUT_SCRIPT_TYPES = (
-    InputScriptType.SPENDMULTISIG,
-    InputScriptType.SPENDP2SHWITNESS,
-    InputScriptType.SPENDWITNESS,
-)
-MULTISIG_OUTPUT_SCRIPT_TYPES = (
-    OutputScriptType.PAYTOMULTISIG,
-    OutputScriptType.PAYTOP2SHWITNESS,
-    OutputScriptType.PAYTOWITNESS,
-)
+    from typing import Any, Awaitable
 
-CHANGE_OUTPUT_TO_INPUT_SCRIPT_TYPES = {
-    OutputScriptType.PAYTOADDRESS: InputScriptType.SPENDADDRESS,
-    OutputScriptType.PAYTOMULTISIG: InputScriptType.SPENDMULTISIG,
-    OutputScriptType.PAYTOP2SHWITNESS: InputScriptType.SPENDP2SHWITNESS,
-    OutputScriptType.PAYTOWITNESS: InputScriptType.SPENDWITNESS,
-}  # type: Dict[EnumTypeOutputScriptType, EnumTypeInputScriptType]
-INTERNAL_INPUT_SCRIPT_TYPES = tuple(CHANGE_OUTPUT_TO_INPUT_SCRIPT_TYPES.values())
-CHANGE_OUTPUT_SCRIPT_TYPES = tuple(CHANGE_OUTPUT_TO_INPUT_SCRIPT_TYPES.keys())
-
-SEGWIT_INPUT_SCRIPT_TYPES = (
-    InputScriptType.SPENDP2SHWITNESS,
-    InputScriptType.SPENDWITNESS,
-)
-
-NONSEGWIT_INPUT_SCRIPT_TYPES = (
-    InputScriptType.SPENDADDRESS,
-    InputScriptType.SPENDMULTISIG,
-)
 
 # Machine instructions
 # ===
@@ -244,13 +214,13 @@ def sanitize_tx_input(tx: TransactionType, coin: CoinInfo) -> TxInputType:
         raise wire.DataError("Missing prev_index field.")
     if txi.prev_hash is None or len(txi.prev_hash) != TX_HASH_SIZE:
         raise wire.DataError("Provided prev_hash is invalid.")
-    if txi.multisig and txi.script_type not in MULTISIG_INPUT_SCRIPT_TYPES:
+    if txi.multisig and txi.script_type not in common.MULTISIG_INPUT_SCRIPT_TYPES:
         raise wire.DataError("Multisig field provided but not expected.")
-    if txi.address_n and txi.script_type not in INTERNAL_INPUT_SCRIPT_TYPES:
+    if txi.address_n and txi.script_type not in common.INTERNAL_INPUT_SCRIPT_TYPES:
         raise wire.DataError("Input's address_n provided but not expected.")
     if not coin.decred and txi.decred_tree is not None:
         raise wire.DataError("Decred details provided but Decred coin not specified.")
-    if txi.script_type in SEGWIT_INPUT_SCRIPT_TYPES:
+    if txi.script_type in common.SEGWIT_INPUT_SCRIPT_TYPES:
         if not coin.segwit:
             raise wire.DataError("Segwit not enabled on this coin")
     return txi
@@ -258,9 +228,9 @@ def sanitize_tx_input(tx: TransactionType, coin: CoinInfo) -> TxInputType:
 
 def sanitize_tx_output(tx: TransactionType, coin: CoinInfo) -> TxOutputType:
     txo = tx.outputs[0]
-    if txo.multisig and txo.script_type not in MULTISIG_OUTPUT_SCRIPT_TYPES:
+    if txo.multisig and txo.script_type not in common.MULTISIG_OUTPUT_SCRIPT_TYPES:
         raise wire.DataError("Multisig field provided but not expected.")
-    if txo.address_n and txo.script_type not in CHANGE_OUTPUT_SCRIPT_TYPES:
+    if txo.address_n and txo.script_type not in common.CHANGE_OUTPUT_SCRIPT_TYPES:
         raise wire.DataError("Output's address_n provided but not expected.")
     if txo.amount is None:
         raise wire.DataError("Missing amount field.")