Built on kaspa:native : Instant Refund Engine
A card or ACH refund is approved in seconds but takes 3–5 business days to settle. That gap is where a big share of the ~$100B a year lost to returns fraud and abuse lives: duplicate refunds, refund-then-chargeback, and disputes that come down to whose logs you trust.
Instant Refund is a refund settlement layer that uses Kaspa as the proof of finality. The existing rails keep moving the money. Each refund is anchored to the blockDAG as a signed transaction, so every party gets a final, verifiable record in seconds. No customer or card data goes on-chain.
Under the hood:
1. FastAPI refund API with idempotent requests.
2. Postgres ledger and a row-locked settlement queue.
3. Workers send HMAC-authenticated intents that expire in 60 seconds.
4. A Rust sidecar holds the only key, checks it against the mainnet address at startup, then signs and submits to kaspad over gRPC.
5. Every refund maps to its Kaspa tx ID in a per-merchant compliance export.
6. The off-chain side is running. Wiring the Rust transaction path into the live sidecar is the current milestone.
If you’re in payments, retail or the Kaspa ecosystem and this is useful to you, DM me. Design doc available.
I pitched to a few FinTech CIOs but could not obtain seed funding. I also applied this product to @ycombinator but was denied acceptance. No active dev or sales.
kaspa:native wasn’t on my work calendar today BUT Zero-knowledge proofs were. I work at a large bank in the USA as a senior IT director.
Look at the meeting title: “Zero-Knowledge Proofs: Privacy Without Compromise.”
Kaspa can verify ZK proofs on L1. Now imagine an AI agent proving it’s authorized to make a payment without exposing everything about the person behind it.
I’m not saying my bank is using Kaspa. I’m asking @hashdag @michaelsuttonil and KII @KaspaKii who’s building that use case on $KAS?
A few more hours until kaspa:native starts its journey back to spot #21 where is was in aug 2024 - along the way it will be listed on binance, coinbase, and Robinhood then start working on top ten!
