Economic / Payment System
XRPL Payment Gateway
Solo-built XRPL payment gateway using a client-sign/server-broadcast model (tx_blob), supporting XRP and issued currencies with deterministic DestinationTag matching.
- Role
- Solo builder · architecture, implementation, and operational tooling
- Period
- 2025.11
- Context
- Beatoz Labs
Solo-built XRPL payment gateway using a client-sign/server-broadcast model (tx_blob), supporting XRP and issued currencies with deterministic DestinationTag matching.
What made the system difficult.
Had to validate tx_blob server-side (destination/vault/amount/tag) while keeping keys on the client and reliably matching payments under a single receiving address.
How boundaries and flows answered it.
Implemented tx_blob decoding/validation, deterministic DestinationTag generation derived from a payment identifier, and a BullMQ confirmation monitor that checks validated success (tesSUCCESS) and emits payment confirmation events.
Overview
- Solo-built XRPL payment gateway with a client-sign/server-broadcast model.
- Supports payment matching via deterministic DestinationTag generation.
Key Flow
- Generate payment request + deterministic DestinationTag for matching
- Validate and decode client-signed tx_blob server-side, then broadcast
- Monitor confirmations via queue/worker and update payment state