update question

README.md

@@ -0,0 +1,32 @@
+# Junior Backend Engineer Interview
+
+Imagine that you're building a fintech system. You're now building a small microservice that allow people to send money to each other.
+
+## Instructions
+
+1. Checkout into a new git branch with name like `YYYY-MM-DD-nickname`
+
+1. Navigate into any language directory you're comfortable with
+
+1. Implement the `POST /transfer` API endpoint that allows you to transfer money from one account to another.
+
+    The account balance has to reflect the new balance after transfer for both accounts and the transaction has to be recorded.
+
+    Example request look like below:
+
+   ```
+   curl -X POST http://localhost:3000/transfer \
+     -H "Content-Type: application/json" \
+     -d '{"amount": 100, "sender": "1", "receiver": "2"}'
+   ```
+
+1. Implement a new API endpoint `GET /all-transactions` that shows all transactions in the system.
+
+1. Commit & push your changes to the git upstream.
+
+Bonus points:
+
+- Implement the requests validation
+- Handle errors appropriately
+
+Good luck!

fastapi-python/README.md

@@ -1,6 +1,6 @@
 # Get started
 
 ```sh
-
+uv venv
-fastapi dev main.py
+uv run fastapi dev main.py
 ```

fastapi-python/main.py

@@ -5,16 +5,18 @@ from pydantic import BaseModel
 
 class Transfer(BaseModel):
     amount: int
-    sender: int
+    sender: str
-    receiver: int
+    receiver: str
 
 app = FastAPI()
 
 accounts = {
-    '1': {'amount': 1000},
+    '1': 1000,
-    '2': {'amount': 1000},
+    '2': 1000,
 }
 
+transactions: list[Transfer] = []
+
 @app.post("/transfer")
 def transfer(transfer: Transfer):
     amount = transfer.amount

go-stdlib/README.md

@@ -0,0 +1,7 @@
+# Instructions
+
+Start the API server using the following command:
+
+```sh
+go run .
+```

go-stdlib/main.go

@@ -18,6 +18,8 @@ var accounts = map[int]int{
 	2: 1000,
 }
 
+var transactions = []Transfer{}
+
 func main() {
 	fmt.Println("Starting server on port 8080")
 	http.HandleFunc("/transfer", transfer)

hono/README.md

@@ -1,8 +1,8 @@
+# Instructions
+
+Start the API server using the following command:
+
 ```
 npm install
 npm run dev
 ```
-
-```
-open http://localhost:3000
-```

hono/src/index.ts

@@ -8,6 +8,8 @@ const accounts = {
   '2': {amount: 1000},
 }
 
+const transactions = []
+
 app.post('/transfer', async (c) => {
   const body = await c.req.json();
   const { amount, sender, receiver } = body;
@@ -23,7 +25,6 @@ app.post('/transfer', async (c) => {
   }
 
   console.log('transfer', transfe);
-
   return c.json(transfer)
 })