Batch fiat mint/burn through CSV file

Crypto assets
#1

I’m planning to implement a function that automates the minting and burning of fiat currencies on my exchange by processing transactions from a CSV file.

This is necessary because I currently have a large volume of fiat transactions that need to be handled manually, and automating this process would significantly streamline operations and reduce the risk of human error.

#2

We implemented a similar system for a European crypto exchange at Impero IT Services, where they were manually reconciling 1,000+ fiat deposit & withdrawal requests per day from multiple PSPs.

key considerations

  1. CSV Input Design
  2. Validation Layer
  3. Integration with HollaEx API
  4. Secure Execution
  5. Notifications & Reporting
#3

How did you develop that? Can you share your code script or a sample to see?

#4

Core Architecture Overview:

  1. Frontend Interface: Admin uploads a CSV file (React + role-based access).

  2. Backend:

  • Parses the CSV
  • Validates schema (amounts, reference ID, PSP codes, timestamps)
  1. Business Logic Layer:
  • Maps fiat transactions => user’s wallet address via internal UID
  • Calls the mint/burn smart contract function via a secure internal service (Web3.py)
  • Logs success/failure entries with hashed transaction data

  1. Queue System: We used Celery + Redis

  2. Audit Trail: All processed rows were stored in a MongoDB audit log

Can’t share the exact code due to NDA

Sample code:

@app.post("/upload")
async def upload_csv(file: UploadFile = File(...), user: User = Depends(get_current_user)):
    df = pd.read_csv(file.file)
    for index, row in df.iterrows():
        if not validate_row(row):
            log_error(row, reason="Invalid data format")
            continue
        enqueue_transaction(row)  # sends to Celery worker
    return {"status": "Processing initiated"}
#5

Your code snippet doesn’t appear to be related to HollaEx in any meaningful way. It looks quite generic and seems more like a promotional effort to showcase your development work rather than contribute to the topic at hand.

Please note that this is a public technical forum and not a marketing platform. If your goal is to advertise your services or portfolio, we recommend reaching out to HollaEx directly and making open-source contributions that demonstrate your skills. That way, you may have the opportunity to be acknowledged or vouched for by the team if your work aligns with the project’s standards.

Let’s keep this space focused on relevant and constructive discussions.