CASE FILE // WEB3 / AI / FULL-STACK
FEHUVIA.
ROLE — LEAD WEB3 & FULL-STACK DEVELOPERTIMELINE — 2026STATUS — LIVE
Open-finance Web3 B2B treasury workstation for Southeast Asian SMEs — marrying relational database state tracking with smart-contract execution rails on Morph L2 to cut settlement from a 3-day banking standard to under 2 seconds (T+0), at a fraction of a cent per transaction.
HIGHLIGHTS
- ▸ Atomic sub-2-second payment clearance on Morph L2 via custom Solidity contracts
- ▸ EVM listener daemon: real-time log syncing into PostgreSQL for dual-state financial auditing
- ▸ AI financial co-pilot: GPT-4o RAG pipeline for structured cashflow analytics and runway forecasting
- ▸ AI OCR scan auto-parses uploaded invoice sheets and fills workstation drawers
- ▸ Self-healing background gas faucet dispenses L2 gas asynchronously to MetaMask operators
- ▸ Zero-custody: client-side signing via MetaMask (EIP-1193) — no private keys near the server
ARCHITECTURE
- ▸ B2BSettlement.sol — mUSDC ERC-20 clearance mapped to invoice UUIDs, strict checks-effects-interactions, PaymentSettled event telemetry
- ▸ Express backend orchestrates AI pipelines and PostgreSQL persistence (pg-pool)
- ▸ Listener daemon reconciles on-chain events into the relational ledger (dual-state)
- ▸ Faucet: < 0.005 ETH balance trigger → 0.002 ETH async dispense from a vault key
- ▸ GPT-4o context-aware RAG prompting with runway JSON structuring
STACK
UI
- React 19
- Vite
- Tailwind CSS
- Recharts
WEB3
- Solidity ^0.8.24
- Hardhat
- Morph L2
- Ethers.js
- MetaMask
BACKEND
- Node.js
- Express
- PostgreSQL
- OCR engine
AI
- OpenAI GPT-4o
- Context-aware RAG
UPLINKS
GALLERY & EVIDENCE FILES
■ [ VIDEO DEMO ] FEHUVIA WORKSTATION WALKTHROUGH — REAL-TIME WEB3 B2B TREASURY WORKSTATION SHOWING L2 PAYMENTS, INVOICE PARSER, AND AI CO-PILOT
■ [ YOUTUBE FEED ] FEHUVIA WORKSTATION VIDEO DEMO — FULL WALK-THROUGH SHOWING INVOICE OCR, WALLET CONNECTION, AND AI CO-PILOT FUNCTIONALITIES (YOUTUBE)