The problem Armina solves

The Problem

Traditional rotating savings (known as "arisan" in Indonesia) is a widespread informal financial practice across Southeast Asia, but it suffers from fundamental issues:

Trust Failure —> The entire system relies on social trust. When one participant defaults or disappears, everyone in the pool loses money. There's no protection or recourse.

Zero Yield —> Collected funds sit idle for months while modern DeFi protocols generate continuous returns. This represents massive opportunity cost for participants.

No Transparency —> Contribution records and payout schedules are managed through WhatsApp screenshots and verbal agreements. Disputes are common and unresolvable.

Cannot Scale —> Without enforcement mechanisms, arisan only works among close friends and family. Expanding to strangers dramatically increases default risk.

How Armina Solves This

125% Collateral Enforcement —> Every participant locks collateral upfront. Defaults are impossible because the smart contract automatically deducts from collateral.

AI-Powered Yield —> Idle funds are automatically deployed to DeFi lending protocols, generating passive yield for all participants.

Full On-Chain Transparency —> Every contribution, payout, and winner selection is recorded on Base blockchain. Fully auditable and trustless.

Scalable by Design —> Smart contract rules replace social trust. Anyone can join pools with strangers safely.

Built on Base with Coinbase Smart Wallet, Privy authentication, MiniKit and OnchainKit integration.

Challenges I ran into

1. Mobile Wallet Connection
   Coinbase Smart Wallet didn't work on mobile browsers without extensions.
   → Fixed by adding Privy (Email/Google login) with embedded wallets.

2. Next.js 16 + Vercel Deployment
   Build failed due to Turbopack vs webpack config conflict.
   → Switched to native Turbopack configuration.

3. 125% Collateral Formula
   Balancing security vs usability for upfront capital requirement.
   → Formula: 125% × (Participants × Contribution) covers obligation + buffer.

4. SSL Issues on Android
   keys.coinbase.com showed certificate errors on some mobile browsers.
   → Made Privy primary login, Coinbase Wallet secondary.