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UUID Use Case

UUID Transaction ID

Financial movements must be traceable and never double-applied. A UUID transaction ID is the anchor of that audit trail.

AuditableIdempotentv7 for time

Version

How many

Uppercase Hyphens Braces { }

Result

Generated locally with the Web Crypto API — nothing leaves your browser.

What Is UUID Transaction ID?

A v7 UUID transaction ID is time-ordered (helpful when scanning a ledger) and unique, so a retried charge cannot post twice.
Pair it with the idempotency key from the request that created it.

How to generate

Generate a v7 UUID per transaction.
Store it as the ledger primary key.
Reject any duplicate (same idempotency key).

Use Cases

Payments and refunds.
Ledger postings.
Settlement batches.

Code Examples

PostgreSQL

SELECT uuid_generate_v7();  -- time-ordered primary key (pg_uuidv7 / uuid6 ext)

JavaScript

import { v7 as uuidv7 } from 'uuid';
const id = uuidv7(); // time-ordered

Frequently Asked Questions

v4 or v7 for transactions?

v7 gives time-ordering that suits ledger scans; either is unique enough to prevent duplicates.

Transaction ID vs idempotency key?

The key is per-request (retries share it); the transaction ID is the resulting record's id.

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