x402r Verifiable Arbiter on EigenCloud

Verifiable payment dispute arbiter running on EigenCloud for the x402r refundable payments protocol.

When agents transact via x402r (HTTP 402 + escrow + refunds), disputes need a trusted resolver. This arbiter runs in a TEE on EigenCompute and uses EigenAI for deterministic, verifiable rulings — no hidden bias, fully auditable.

How It Works

1. Watch for RefundRequested events on-chain (x402r contracts)
2. Fetch evidence from RefundRequestEvidence contract (IPFS CIDs)
3. Decide using EigenAI with a fixed seed (deterministic inference)
4. Commit decision hash on-chain (prompt hash + seed + response hash)
5. Execute decision via x402r SDK (approve/deny refund)

Anyone can replay the same prompt + seed on EigenAI and verify the ruling matches the on-chain commitment.

Architecture

EigenCloud TEE
├── Arbiter Server (TypeScript)
│   ├── Event watcher (x402r contracts)
│   ├── Evidence collector (on-chain + IPFS)
│   ├── EigenAI client (wallet-signed grant auth)
│   └── On-chain executor (@x402r/arbiter SDK)
│
├── EigenAI (deterministic LLM inference, seed-locked)
└── TEE wallet (auto-generated by KMS)

On-chain (Base Sepolia)
├── RefundRequest (dispute lifecycle)
├── RefundRequestEvidence (IPFS CIDs)
└── PaymentOperator (escrow + refund execution)

Development

npm install
cp .env.example .env
npm run dev

Verify EigenAI Connection

npx ts-node src/verify-eigenai.ts

Deployment

# Deploy to EigenCompute TEE
ecloud compute app deploy

Management

ecloud compute app info         # App details
ecloud compute app logs         # View logs
ecloud compute app stop         # Stop app
ecloud compute app terminate    # Terminate app

License

MIT