LerianStudio

LerianStudio / tracer

Public

Tracer is a real-time, deterministic, transaction validation engine, natively integrated with Midaz

30
1
100% credibility
Found Feb 06, 2026 at 19 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
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AI Summary

Tracer provides real-time validation for financial transactions using customizable rules and spending limits to approve, deny, or flag them for review.

How It Works

1
🔍 Discover Tracer

You hear about Tracer, a smart helper that watches your money transactions to spot and stop fraud instantly.

2
📥 Get it running

Download and start it on your computer with a simple command, and it sets up everything you need including a sample database.

3
✨ Create safety rules

Make easy rules like 'review big spends over $10,000' or 'block suspicious shops' without writing code.

4
💳 Set spending caps

Add limits like '$5,000 per day per customer' to control risks across accounts or groups.

5
🧪 Test a transaction

Send a pretend payment and instantly see if it's safe (allow), risky (review), or blocked (deny).

✅ Fraud protection live

Your transactions are now automatically checked and protected, keeping your money safe 24/7.

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Star Growth

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AI-Generated Review

What is tracer?

Tracer is a Go-based API for real-time transaction validation in financial apps, delivering ALLOW/DENY/REVIEW decisions in under 100ms. You POST transaction details—like amount, account ID, merchant category—to `/v1/validations`, and it checks against CEL rules (e.g., `amount > 10000`) and multi-scope spending limits (account/segment/portfolio). It logs immutable audits for compliance, decoupling fraud checks from your payment logic.

Why is it gaining traction?

It stands out with deterministic, sub-100ms responses via CEL—faster and safer than probabilistic ML fraud tools—plus hierarchical limits that reset daily/monthly. Docker Compose spins up Postgres and Jaeger instantly for local testing, and the API handles rule/limit CRUD with activation workflows. Unlike datadog tracer github for monitoring or saml-tracer github for auth, this nails real-time tracker needs like packet tracer real time mode for transaction paths.

Who should use this?

Fintech backend devs building payment gateways for cards/PIX/crypto, risk teams enforcing velocity checks or merchant blocks, and compliance officers needing 7-year audit trails. Ideal if you're wiring fraud rules without redeploys, like high-value reviews or segment caps.

Verdict

Prototype it—v0.1 has polished docs, Makefile helpers, and OpenAPI specs, but 20 stars and 1.0% credibility signal early maturity. Strong for real-time transaction validation if compliance beats scale.

(198 words)

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