Project overview
SLIK is a payment system inspired by Poland's BLIK, built on Solana blockchain. Merchant enters the amount, customer generates a 6-digit code in the app, tells it to the merchant, approves in wallet - and the payment goes through instantly with on-chain confirmation. Internal HeyNeuron project built in 48h during a hackathon. Contributors: Konrad Bachowski (github.com/konradbachowski), Daniel Dzierzęcki (github.com/Dzierzyn), Kuba Kołtun (github.com/kubakoltun), Tomasz Stefaniak (github.com/tomaszstefaniak).
The challenge
Existing crypto payment systems require scanning QR codes or copying long wallet addresses. It's slow, inconvenient, and error-prone.
Speed and simplicity
We needed a system where payment takes seconds - just like BLIK in Poland. No QR codes, no addresses, no complications.
On-chain security
Every payment must be confirmed on the blockchain with an immutable transaction proof - not just in a database.
Multi-currency support
Merchants think in PLN, USD, EUR - the system must automatically convert to SOL at the current exchange rate.
Our solution
Hybrid architecture combining server speed with blockchain security.
Anchor smart contract
Solana program handling atomic SOL transfer, receipt PDA creation, and event emission.
Web application
Two interfaces: merchant terminal (entering amount and code) and customer panel (generating code and approving payment).
Mobile application
Native Android app in React Native with Phantom wallet integration via Mobile Wallet Adapter.
Developer SDK
Two npm packages allowing any app to integrate SLIK payments without Anchor dependency.
Describe what you want to improve - quote in 24h
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Project duration
48h
Scope of work
Web app + mobile app + smart contract + SDK
Technologies
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