DevDeer TechLoading
Blockchain & Crypto
Stored balance, credits, points or in-app coins, top-ups, spending rules, expiry and a full ledger.
From $1,500.00
You want prepaid credits, points or in-app coins but a balance column on a user row is a disaster waiting to happen. Race conditions double-spend, refunds don't reconcile, and when a customer disputes a balance there's no trail to prove what happened.
We build a proper wallet on a double-entry ledger, so every credit has a matching debit and the balance is always provable. Top-ups through your gateway, spend rules, bonuses and expiry, referral and reward credits, admin adjustments with an audit trail, and clean statements for users.
PostgreSQL double-entry ledger with integer minor units, idempotent transactions, Redis locks for concurrency, gateway top-ups, BullMQ for expiry/bonus jobs, full audit log, user statements.
$1,500
Delivery: 2–4 weeks
$4,690
Delivery: 5–8 weeks
$15,000
Delivery: 8–12 weeks
A balance column can be corrupted by simultaneous requests and offers no proof of how a figure was reached. A double entry ledger records a matching debit and credit for every movement, so each balance can be verified and disputes can be resolved with evidence.
Transactions are idempotent, amounts are stored in integer minor units, and concurrent requests are controlled with locks. A repeated or interrupted request cannot create or remove funds.
It can include gateway top ups, spend rules, bonuses, expiry, referral and reward credits, admin adjustments with a full audit trail, and statements for each user.
Starter is $1500 and takes 2 to 4 weeks. Growth is $4690 and takes 5 to 8 weeks. Premium is $15000 and takes 8 to 12 weeks and adds multi currency wallets and complex rules. Custom needs are quoted individually.
You'll be asked to sign in or create an account.
| Compare | Starter | Growth | Premium |
|---|---|---|---|
| Double-entry ledger | Included | Included | Included |
| Bonuses & expiry | Not included | Included | Included |
| Multi-currency | Not included | Not included | Included |
Custom: quote
Yes. Administrators can post an adjustment, and every adjustment is recorded with the person responsible and the reason. Nothing is deleted, which keeps your accounts auditable.