Files
plm-lottery/app/auth/routes.py
T
davideandClaude Opus 5 0cf35147ad Answer user-facing API failures with a machine-readable error code
The dashboard now speaks seven languages but every failure path still showed
the API's raw English text ("insufficient balance", "current password is
incorrect"), which is the most frequent and least forgiving part of the UI to
leave untranslated.

Rather than teach the API about locales, it keeps answering in one language
and hands the client something to translate: `detail` becomes
{code, message, params}, where message stays English for non-dashboard
consumers (curl, tests) and code maps onto `error.<code>` in i18n.js. An
unknown code falls back to message, so a client older or newer than the server
degrades to English instead of a blank toast.

Domain exceptions (BetError, WithdrawalError) subclass the new ApiError and
carry the code from where the failure actually happens; str(exc) is still the
English message, so existing tests keep matching on it. Interpolated values
travel in params rather than baked into the English sentence — amounts as
*_sats, from which the frontend derives a *_plm sibling, so each language can
place them wherever its grammar wants.

admin.js reads detail.message defensively: the admin endpoints still return a
bare string, but the shared auth dependencies now return the structured form.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-07-26 21:44:39 +02:00

76 lines
2.6 KiB
Python

from fastapi import APIRouter, Depends, Request, status
from pydantic import BaseModel
from sqlalchemy import func, select
from sqlalchemy.exc import IntegrityError
from sqlalchemy.ext.asyncio import AsyncSession
from app.api.errors import http_error
from app.auth.security import create_access_token, hash_password, verify_password
from app.db.models import User
from app.db.session import get_session
from app.wallet.hd import derive_user_address
router = APIRouter(prefix="/auth", tags=["auth"])
_MAX_REGISTER_RETRIES = 5
class RegisterRequest(BaseModel):
username: str
password: str
class TokenResponse(BaseModel):
access_token: str
address: str
@router.post("/register", response_model=TokenResponse, status_code=status.HTTP_201_CREATED)
async def register(
body: RegisterRequest, request: Request, session: AsyncSession = Depends(get_session)
) -> TokenResponse:
existing = await session.scalar(select(User).where(User.username == body.username))
if existing is not None:
raise http_error(status.HTTP_409_CONFLICT, "username_taken", "username already taken")
password_hash = hash_password(body.password)
for _ in range(_MAX_REGISTER_RETRIES):
max_index = await session.scalar(select(func.max(User.derivation_index)))
next_index = 0 if max_index is None else max_index + 1
address = derive_user_address(next_index)
user = User(
username=body.username,
password_hash=password_hash,
derivation_index=next_index,
address=address,
)
session.add(user)
try:
await session.commit()
except IntegrityError:
await session.rollback()
continue
await session.refresh(user)
request.app.state.electrum_listener.address_for_new_user(user.id, user.address)
return TokenResponse(access_token=create_access_token(user.id), address=user.address)
raise http_error(
status.HTTP_409_CONFLICT,
"derivation_index_conflict",
"could not allocate a derivation index, retry",
)
class LoginRequest(BaseModel):
username: str
password: str
@router.post("/login", response_model=TokenResponse)
async def login(body: LoginRequest, session: AsyncSession = Depends(get_session)) -> TokenResponse:
user = await session.scalar(select(User).where(User.username == body.username))
if user is None or not verify_password(body.password, user.password_hash):
raise http_error(status.HTTP_401_UNAUTHORIZED, "invalid_credentials", "invalid credentials")
return TokenResponse(access_token=create_access_token(user.id), address=user.address)