[add] Python client packaging first draft

.github/workflows/python-client.yml

@@ -0,0 +1,43 @@
+name: Python client checks, package build and deployment
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - develop
+      - master
+  pull_request:
+
+jobs:
+  lint:
+    name: Linting
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone
+        uses: actions/checkout@v3
+      - run: pip install flake8
+      - name: Flake8 lint Python code
+        run: find client/src/ -type f -name '*.py' -exec flake8 --max-line-length=120 '{}' '+'
+
+  mypy:
+    name: Type checking
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone
+        uses: actions/checkout@v3
+      - run: pip install mypy
+      - name: Mypy type checking
+        run: mypy client/src
+
+  build:
+    name: Building the package
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone
+        uses: actions/checkout@v3
+      - run: pip install --upgrade pip build twine
+      - name: Build and test the package
+        run: |
+          cd client/
+          python -m build .
+          python -m twine check dist/*

client/.gitignore

@@ -0,0 +1,4 @@
+*egg-info
+dist
+*wheel
+*~

client/MANIFEST.in

@@ -0,0 +1 @@
+include src/ledger_app_clients/ethereum/keychain/*

client/README.md

@@ -0,0 +1,28 @@
+# Ethereum app Python client
+
+This package allows to communicate with the Ethereum application, either on a
+real device, or emulated on Speculos.
+
+## Installation
+
+This package is deployed:
+
+- on `pypi.org` for the stable version. This version will work with the
+  application available on the `master` branch.
+  ```bash
+  pip install ledger_app_clients.ethereum`
+  ```
+- on `test.pypi.org` for the rolling release. This verison will work with the
+  application code on the `develop` branch.
+  ```bash
+  pip install --extra-index-url https://test.pypi.org/simple/ ledger_app_clients.ethereum`
+  ```
+
+### Installation from sources
+
+You can install the client from this repo:
+
+```bash
+cd client/
+pip install .
+```

client/pyproject.toml

@@ -0,0 +1,45 @@
+[build-system]
+requires = [
+    "setuptools>=45",
+    "setuptools_scm[toml]>=6.2",
+    "wheel"
+]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "ledger_app_clients.ethereum"
+authors = [
+    { name = "Ledger", email = "hello@ledger.fr" }
+]
+description = "Ledger Ethereum Python client"
+readme = { file = "README.md", content-type = "text/markdown" }
+# license = { file = "LICENSE" }
+classifiers = [
+    "License :: OSI Approved :: Apache License 2.0",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Operating System :: POSIX :: Linux",
+    "Operating System :: Microsoft :: Windows",
+    "Operating System :: MacOS :: MacOS X",
+]
+dynamic = [ "version" ]
+requires-python = ">=3.7"
+dependencies = [
+    "ragger[speculos]",
+    "simple-rlp",
+]
+
+[tools.setuptools]
+include-package-data = true
+
+[tool.setuptools.dynamic]
+version = {attr = "ledger_app_clients.ethereum.__version__"}
+
+[project.urls]
+Home = "https://github.com/LedgerHQ/app-ethereum"
+
+# [tool.setuptools_scm]
+# write_to = "ledgerwallet/__version__.py"
+# local_scheme = "no-local-version"

client/src/ledger_app_clients/ethereum/__init__.py

@@ -0,0 +1 @@
+__version__ = "0.0.1"

client/src/ledger_app_clients/ethereum/client.py

@@ -1,16 +1,14 @@
-from enum import IntEnum, auto
+import rlp
-from typing import Optional
+from enum import IntEnum
 from ragger.backend import BackendInterface
 from ragger.utils import RAPDU
+
 from .command_builder import CommandBuilder
 from .eip712 import EIP712FieldType
+from .keychain import sign_data, Key
 from .tlv import format_tlv
-from pathlib import Path
-import keychain
-import rlp
 
 
-ROOT_SCREENSHOT_PATH = Path(__file__).parent.parent
 WEI_IN_ETH = 1e+18
 
 
@@ -134,7 +132,7 @@ class EthAppClient:
         payload += format_tlv(DOMAIN_NAME_TAG.DOMAIN_NAME, name)
         payload += format_tlv(DOMAIN_NAME_TAG.ADDRESS, addr)
         payload += format_tlv(DOMAIN_NAME_TAG.SIGNATURE,
-                              keychain.sign_data(keychain.Key.DOMAIN_NAME, payload))
+                              sign_data(Key.DOMAIN_NAME, payload))
 
         chunks = self._cmd_builder.provide_domain_name(payload)
         for chunk in chunks[:-1]:

client/src/ledger_app_clients/ethereum/command_builder.py

@@ -1,8 +1,10 @@
-from enum import IntEnum, auto
-from typing import Iterator, Optional
-from .eip712 import EIP712FieldType
-from ragger.bip import pack_derivation_path
 import struct
+from enum import IntEnum
+from ragger.bip import pack_derivation_path
+from typing import Iterator
+
+from .eip712 import EIP712FieldType
+
 
 class InsType(IntEnum):
     SIGN = 0x04
@@ -13,12 +15,14 @@ class InsType(IntEnum):
     GET_CHALLENGE = 0x20
     PROVIDE_DOMAIN_NAME = 0x22
 
+
 class P1Type(IntEnum):
     COMPLETE_SEND = 0x00
     PARTIAL_SEND = 0x01
     SIGN_FIRST_CHUNK = 0x00
     SIGN_SUBSQT_CHUNK = 0x80
 
+
 class P2Type(IntEnum):
     STRUCT_NAME = 0x00
     STRUCT_FIELD = 0xff
@@ -29,6 +33,7 @@ class P2Type(IntEnum):
     FILTERING_CONTRACT_NAME = 0x0f
     FILTERING_FIELD_NAME = 0xff
 
+
 class CommandBuilder:
     _CLA: int = 0xE0
 

client/src/ledger_app_clients/ethereum/eip712/InputData.py

@@ -1,13 +1,13 @@
-#!/usr/bin/env python3
-
-import json
-import sys
-import re
 import hashlib
-from app.client import EthAppClient, EIP712FieldType
+import json
-import keychain
+import re
-from typing import Callable
 import signal
+import sys
+from typing import Callable
+
+from ledger_app_clients.ethereum import keychain
+from ledger_app_clients.ethereum.client import EthAppClient, EIP712FieldType
+
 
 # global variables
 app_client: EthAppClient = None
@@ -18,8 +18,6 @@ sig_ctx = {}
 autonext_handler: Callable = None
 
 
-
-
 # From a string typename, extract the type and all the array depth
 # Input  = "uint8[2][][4]"          |   "bool"
 # Output = ('uint8', [2, None, 4])  |   ('bool', [])

client/src/ledger_app_clients/ethereum/eip712/__init__.py

@@ -0,0 +1 @@
+from .struct import EIP712FieldType  # noqa

client/src/ledger_app_clients/ethereum/eip712/struct.py

@@ -1,5 +1,6 @@
 from enum import IntEnum, auto
 
+
 class EIP712FieldType(IntEnum):
     CUSTOM = 0,
     INT = auto()

client/src/ledger_app_clients/ethereum/keychain.py

@@ -1,9 +1,10 @@
 import os
 import hashlib
-from ecdsa.util import sigencode_der
 from ecdsa import SigningKey
+from ecdsa.util import sigencode_der
 from enum import Enum, auto
 
+
 # Private key PEM files have to be named the same (lowercase) as their corresponding enum entries
 # Example: for an entry in the Enum named DEV, its PEM file must be at keychain/dev.pem
 class Key(Enum):

client/src/ledger_app_clients/ethereum/settings.py

@@ -1,8 +1,8 @@
 from enum import Enum, auto
-from typing import List
 from ragger.firmware import Firmware
 from ragger.navigator import Navigator, NavInsID, NavIns
 
+
 class SettingID(Enum):
     BLIND_SIGNING = auto()
     DEBUG_DATA = auto()

tests/ragger/requirements.txt

@@ -1,4 +1,4 @@
 ragger[speculos]
 pytest
 ecdsa
-simple-rlp
+./client/

tests/ragger/test_domain_name.py

@@ -1,12 +1,16 @@
 import pytest
-from ragger.error import ExceptionRAPDU
+from pathlib import Path
-from ragger.firmware import Firmware
 from ragger.backend import BackendInterface
+from ragger.firmware import Firmware
+from ragger.error import ExceptionRAPDU
 from ragger.navigator import Navigator, NavInsID
-from app.client import EthAppClient, StatusWord, ROOT_SCREENSHOT_PATH
+
-from app.settings import SettingID, settings_toggle
+import ledger_app_clients.ethereum.response_parser as ResponseParser
-import app.response_parser as ResponseParser
+from ledger_app_clients.ethereum.client import EthAppClient, StatusWord
-import struct
+from ledger_app_clients.ethereum.settings import SettingID, settings_toggle
+
+
+ROOT_SCREENSHOT_PATH = Path(__file__).parent
 
 # Values used across all tests
 CHAIN_ID = 1
@@ -73,7 +77,6 @@ def test_send_fund_wrong_challenge(firmware: Firmware,
                                    backend: BackendInterface,
                                    navigator: Navigator):
     app_client = EthAppClient(backend)
-    caught = False
     challenge = common(app_client)
 
     try:

tests/ragger/test_eip712.py

@@ -1,37 +1,42 @@
-import pytest
-import os
 import fnmatch
-from typing import List
+import os
-from ragger.firmware import Firmware
+import pytest
-from ragger.backend import BackendInterface
-from ragger.navigator import Navigator, NavInsID
-from app.client import EthAppClient
-from app.settings import SettingID, settings_toggle
-from eip712 import InputData
-from pathlib import Path
-from configparser import ConfigParser
-import app.response_parser as ResponseParser
-from functools import partial
 import time
+from configparser import ConfigParser
+from functools import partial
+from pathlib import Path
+from ragger.backend import BackendInterface
+from ragger.firmware import Firmware
+from ragger.navigator import Navigator, NavInsID
+from typing import List
+
+import ledger_app_clients.ethereum.response_parser as ResponseParser
+from ledger_app_clients.ethereum.client import EthAppClient
+from ledger_app_clients.ethereum.eip712 import InputData
+from ledger_app_clients.ethereum.settings import SettingID, settings_toggle
+
 
 BIP32_PATH = "m/44'/60'/0'/0/0"
 
 
 def input_files() -> List[str]:
     files = []
-    for file in os.scandir("%s/eip712/input_files" % (os.path.dirname(__file__))):
+    for file in os.scandir("%s/eip712_input_files" % (os.path.dirname(__file__))):
         if fnmatch.fnmatch(file, "*-data.json"):
             files.append(file.path)
     return sorted(files)
 
+
 @pytest.fixture(params=input_files())
 def input_file(request) -> str:
     return Path(request.param)
 
+
 @pytest.fixture(params=[True, False])
 def verbose(request) -> bool:
     return request.param
 
+
 @pytest.fixture(params=[False, True])
 def filtering(request) -> bool:
     return request.param