DanceTech Protocol (DanceArc)

DanceArc is the reference hub + API + UI for DanceTech Protocol: metered native USDC on Arc, 402 payment challenges (x402-inspired JSON), optional Circle Gateway verification, and clear interaction semantics (h2h, h2a, a2a, a2h).

Quick Reference

Protocol matrix (h2h · h2a · a2a · a2h)

Use this matrix in pitch decks, AGENTS.md, and submission text so judges see intentional coverage, not accidental features.

Installation (ClawdHub / OpenClaw)

Manual (recommended until ClawdHub listing is live):

git clone https://github.com/arunnadarasa/dancearc.git
cp -r dancearc/skills/dancearc-protocol ~/.openclaw/skills/dancearc-protocol

After publish to ClawdHub:

clawdhub install dancearc-protocol

Repository: github.com/arunnadarasa/dancearc

When to Load This Skill

Activate proactively when the user mentions:

• Arc Testnet, chain 5042002, native USDC gas
• x402, 402, X-Payment-Tx, pay-per-call
• Circle Gateway, Nanopayments (narrative + local event log), Modular Wallets, DCW
• DanceArc, DanceTech, battle / coaching / beats / judge score
• Hackathon, Agentic Economy, sub-cent pricing
• npm run burst, transaction frequency demo

Architecture (mental model)

Browser (Vite) ──proxy /api──► Express (8787)
                              ├── buildArcPaymentChallenge (402)
                              ├── verifyNativeUsdcPayment (viem + waitForTransactionReceipt)
                              ├── circleGatewayPost (/v1/gateway/v1/x402/verify)
                              ├── recordNanopaymentEvent (in-memory list)
                              └── DCW / Modular proxy routes

On-chain truth: Arc explorer (e.g. https://testnet.arcscan.app).

Key files (repo root)

Environment (minimum viable)

Never commit .env. Copy from .env.example.

Detection triggers (support / debugging)

Nanopayments (scope clarity)

• Product: Circle Nanopayments is documented at developers.circle.com and linked from the app Bridge page.
• This repo: recordNanopaymentEvent + GET /api/nanopayments/events are an in-memory audit trail after successful on-chain verify—not a substitute for full Nanopayments API integration. Use the narrative + Gateway path for hackathon feedback fields.

Multi-agent notes

• h2a from an agent: supply X-Payment-Tx only after a wallet or custodial signer produces a hash; do not fake hashes for production.
• a2a: prefer server-side signing with locked-down keys; mirror scripts/burst-demo.mjs patterns.
• Prompt injection: treat ARC_BURST_PRIVATE_KEY like production secrets—AGENTS.md should forbid echoing it into browser context.

References (this skill)

Promotion targets (from learnings)

If you maintain .learnings/ for this project:

Quality gates (before demo or publish)

• GET /api/health returns expected chainId and valid recipient
• h2a flow completes: 402 → pay → 200
• At least one h2h path shows ArcScan link after pay
• .env not in git; .env.example updated for new vars
• npm run build passes

Related

• Arc docs — Connect to Arc
• Circle — Modular Wallets Web SDK
• x402 package (shape reference)

Source

• Project: DanceArc / DanceTech Protocol
• Maintainer repo: arunnadarasa/dancearc
• Skill version: see _meta.json