Full-stack banking app with:

• client: React + TypeScript + Vite
• server: Node.js + Express + TypeScript
• PostgreSQL for core data and ledger data

• client/ - frontend app
• server/ - backend API
• init_schema.sql - database schema bootstrap

• Auth: register, login, JWT-based session, GET /auth/me
• Accounts:
  • account overview for current user
  • create account
  • delete account
  • deposit / withdraw (with no-negative-balance protection)
• Transfers:
  • account-to-account transfer
  • last transactions per account
  • 2PC simulation with failpoints (IN_DOUBT, recover flow)

• Node.js 20+ (your project currently uses Node 22)
• npm
• PostgreSQL (or Supabase Postgres URLs)

Create server/.env (you can copy from server/.example_env):

PORT=5001
CORE_DB_URL=postgresql://...
LEDGER_DB_URL=postgresql://...
PG_DISABLE_SSL=false
SIMULATE_FAILURE=false
AUTH_SECRET=dev-auth-secret-change-me
AUTH_TOKEN_TTL_SECONDS=86400
BCRYPT_SALT_ROUNDS=12

cd server && npm install
cd ../client && npm install

Start backend:

cd server
npm run dev

Start frontend:

cd client
npm run dev

URLs:

• Frontend: http://localhost:5173
• Backend: http://localhost:5001

Backend:

cd server
npm run typecheck
npm run build
npm run start

Frontend:

cd client
npm run build
npm run preview

Auth:

• POST /auth/register
• POST /auth/login
• GET /auth/me

Accounts:

• POST /accounts
• GET /accounts/overview
• GET /accounts/recipient-accounts?username=...
• GET /accounts/:accId/transactions?limit=5
• POST /accounts/:accId/transfer
• POST /accounts/:accId/adjust-balance
• DELETE /accounts/:accId

Transactions (2PC simulation):

• POST /transactions/transfer
• GET /transactions/:txId
• POST /transactions/:txId/recover
• GET /transactions/failpoint
• POST /transactions/failpoint

• Current client-server API base is http://localhost:5001.
• For simulation flows, transfer may return non-200 with transaction state; use status/recover endpoints to finalize.
• Extra module-level docs are in:
  • client/README.md
  • client/src/README.md
  • server/README.md
  • server/src/README.md