CSENS:
Green Commerce Mobile Wallet
A blockchain-powered mobile wallet rewarding users for spending with environmentally and socially conscious businesses — combining green commerce incentives, on-chain token rewards, and traditional payment infrastructure in one consumer app.
Stack
React Native, AWS, SKALE, Solidity
Role
Design & Development Partner
Scope
Mobile, Backend, Smart Contracts, Infrastructure
The Mission
“To incentivise and reward environmentally and socially conscious consumer spending — connecting users with eco-friendly businesses through a blockchain-powered mobile wallet that makes ethical spending tangible, trackable, and rewarding.”
Core Objectives
- Cross-platform mobile wallet for sustainable commerce
- Token-based rewards for spending with green merchants
- Bridging traditional payment rails with on-chain incentive mechanics
- Consumer-friendly UX for non-crypto-native users
The Challenge
No mainstream payment tool connected everyday purchases to sustainability outcomes in a meaningful way. CSENS needed complex tokenomics — a stablecoin (Element), a volatile reward token (Compound), a loyalty rating (Kudos), and a monthly reward pool (Guerdon) — to work together inside an intuitive consumer mobile experience, without exposing blockchain complexity to users.
The project spanned 2020–2024 with a major rebrand and complete tech stack overhaul in 2021. Third-party KYC (FrankieOne) and payment (Novatti) integrations introduced external dependencies and coordination overhead. Smart contracts required a Fibonacci-based token release algorithm for Compound and a multi-currency monthly reward distribution mechanism, all on SKALE's gas-free EVM network.
What We Built
CSENS Pay — Mobile Wallet
React Native cross-platform app for iOS and Android — handling user onboarding, merchant discovery, payments, token balances, and reward tracking in a single, consumer-friendly interface.
On-Chain Token Suite
Four ERC20 smart contracts on SKALE: Element (stablecoin), Compound (volatile token with Fibonacci release algorithm), Kudos (sustainability rating ledger), and Guerdon (multi-currency monthly reward pool).
Microservice Backend
BFF-pattern backend combining Medusa (e-commerce), a custom app API and auth service, and Directus (BaaS and admin UI) — deployed on AWS Fargate with ALB, RDS PostgreSQL, and Redis.
Payments & KYC Integration
Novatti merchant payment gateway and card issuance, FrankieOne KYC for compliant user onboarding, and Twilio for SMS verification — bridging regulated financial rails with on-chain reward mechanics.
Technical Architecture
React Native mobile app backed by a three-service microservice architecture (Medusa, custom API, Directus) on AWS CDK — Fargate with ALB, RDS PostgreSQL, Redis, and a bastion host. Three Next.js frontends on Vercel (admin, storefront, app frontend). Smart contracts on SKALE for gas-free token operations. Structured across phased milestones: App Store readiness, payment/KYC integration, then full on-chain token functionality.
Real Impact.
CSENS delivered a multi-phase blockchain-powered mobile wallet connecting green commerce incentives with on-chain token rewards — spanning four ERC-20 tokens on SKALE, a microservice backend on AWS, and a consumer-friendly React Native app across iOS and Android.
- ERC-20 Tokens
- 4
- Delivery
- Multi-Phase
- Network
- SKALE
- Platforms
- iOS & Android
