Guide · Economy & security
How to Stress-Test a FiveM Economy Script Before Launch
The race test, the crash test, and the reconciliation habit — a concrete method for proving a FiveM economy script won't dupe or drift, with our published results.
Before trusting any FiveM economy script, run three tests: a race test (fire ~20 concurrent transactions from one balance — exactly one should succeed), a crash test (kill the server mid-transaction repeatedly — the ledger must reconcile to zero drift), and a reconciliation query comparing balances to transaction history. A sound money system produces zero duplicates and zero drift. Ours did, and the dated results are published.
Economies don't die from hackers first — they die from concurrency
The most common cause of a corrupted FiveM economy isn't an exploit; it's two legitimate operations touching the same balance at the same time, or a server restart landing in the middle of a write. A transfer that debits one account and credits another is two operations — if the server dies between them, money was created or destroyed. Multiply by months of restarts and you get the slow drift that makes server economies feel broken without anyone knowing why.
None of this shows up in a feature demo. It only shows up under deliberate stress, which is why you test before launch — or verify the seller already did.
Test 1 — the race
Purpose: prove concurrent operations on one balance can't double-spend.
- Set up an account with exactly enough balance for ONE transfer.
- Fire ~20 identical transfers from it concurrently (a burst loop from a test client, or a server-side test harness if provided).
- Pass condition: exactly 1 success, 19 clean rejections, and a transaction log whose entries sum to the observed balances.
- Our published result for VF Banking: 20 concurrent transfers → 1 success, 0 duplicates, 584-row audit ledger verified symmetric on Qbox and standalone (measured 2026-07-05).
Test 2 — the crash
Purpose: prove a mid-write failure can't create or destroy money.
- Start a steady stream of transfers, then kill the server process mid-stream — not a graceful stop, a kill.
- Restart, then reconcile: does the sum of all ledger entries still equal the sum of all balances?
- Repeat the cycle multiple times; drift compounds, so one clean pass isn't proof.
- Our published result: kill-mid-transfer × 10 cycles → reconcile drift = 0 (measured 2026-07-06).
Test 3 — the reconciliation habit
Reconciliation is one query: total credits minus total debits per account versus the stored balance. Any nonzero difference is an incident with a paper trail, not a mystery. Run it weekly in production and after every crash — it turns 'our economy feels inflated' into a measurable, attributable fact.
This only works if the script writes an append-only transaction ledger in the first place. A money system without a ledger can't be reconciled, only re-set — which is why 'has an audit trail' belongs on your purchase checklist, not your nice-to-have list.
What to demand from any economy-script seller
- Published race and crash results with dates and conditions — or a trial you can run these tests against yourself.
- An append-only transaction ledger (reconcilable), not just a balances table.
- Integer money math (minor units) — floating-point balances drift by construction.
- Atomicity guarantees stated in writing: what happens if the server dies mid-transfer?
- Server-authoritative amounts everywhere (see our net-event security guide).
Frequently asked
How do money dupes actually happen in FiveM?
Mostly through race conditions — two concurrent operations reading the same balance before either writes — and through client-trusted amounts. Both are testable before launch: fire concurrent transfers at one balance and verify exactly one succeeds.
What is ledger drift?
The gap between what a transaction history says balances should be and what the balances table actually holds. It's created by non-atomic writes interrupted by crashes. A sound economy script reconciles to zero drift after repeated kill-mid-transaction tests.
Can I run these tests myself?
Yes — the race test needs a burst of concurrent transfers against a minimal balance; the crash test needs a kill of the server process mid-stream and a reconciliation query afterward. Any seller offering a trial or open components can be tested this way in under an hour.
What results should a good economy script produce?
Race: exactly one success from N concurrent attempts on a single-transfer balance, zero duplicates. Crash: zero reconciliation drift across repeated kill cycles. VF Banking's published results: 20-way race → 1 success/0 dupes (2026-07-05); kill × 10 → drift = 0 (2026-07-06).
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