nexwave-gateway 🌐

Unified Crosschain USDC for OpenClaw Agents — Powered by Circle Gateway

The only OpenClaw skill that gives agents a single USDC balance accessible on any chain in <500ms. No bridging. No liquidity pools. No waiting.

What It Does

nexwave-gateway enables OpenClaw agents to use Circle Gateway for instant crosschain USDC operations. Instead of managing separate USDC balances on Ethereum, Base, Avalanche, etc., your agent deposits USDC into Gateway on any chain and can instantly access it on any other supported chain.

The Flow

1. Deposit USDC on Chain A → Gateway credits unified balance
2. Sign burn intent → Gateway returns attestation (<500ms)
3. Submit attestation on Chain B → USDC minted for you

Why This Matters for Agents

• Capital efficiency: No pre-positioning USDC across chains
• Speed: <500ms crosschain transfers vs. 15-20 minute bridge waits
• Simplicity: One balance, accessible everywhere
• Non-custodial: Funds only move with your signature

Quick Start

1. Install

clawhub install nexwave-gateway
# or manually:
git clone <repo-url> ~/.openclaw/skills/nexwave-gateway

2. Configure

Install the Circle Wallet skill and set your credentials:

clawhub install eltontay/circle-wallet

# Set Circle Wallet credentials (from https://console.circle.com)
export CIRCLE_API_KEY=your_api_key
export CIRCLE_ENTITY_SECRET=your_entity_secret
export CIRCLE_WALLET_SET_ID=your_wallet_set_id

No raw private keys needed — uses Circle's MPC-secured developer-controlled wallets.

3. Setup & Run

cd ~/.openclaw/skills/nexwave-gateway
bash setup.sh
cd gateway-app
node check-balance.js   # See your unified balance
node deposit.js         # Deposit USDC into Gateway
node transfer.js        # Transfer crosschain to Base

4. Get Testnet USDC

Visit faucet.circle.com — 20 USDC per address per chain, every 2 hours.

Supported Chains (Testnet)

Chain	Network	Domain ID	Notes
Ethereum	Sepolia	0	~20 min finality
Base	Sepolia	6	~13-19 min finality
Arc	Testnet	26	~0.5s finality, USDC-native gas

Files

File	Description
SKILL.md	OpenClaw skill definition with instructions
setup.sh	Project initialization script
abis.js	Gateway Wallet & Minter contract ABIs
gateway-client.js	Lightweight Circle Gateway API client
circle-wallet-client.js	Circle Programmable Wallets SDK wrapper (MPC signing + transactions)
typed-data.js	EIP-712 typed data for burn intents
setup-gateway.js	Chain clients and contract initialization
check-balance.js	Query unified USDC balance
deposit.js	Deposit USDC into Gateway
transfer.js	Full crosschain transfer demo

Circle Products Used

• Circle Gateway — Unified crosschain USDC balance
• Circle Programmable Wallets — MPC-secured developer-controlled wallets (no raw private keys)
• Arc L1 — Circle's purpose-built blockchain where USDC is the native gas token
• USDC — Native stablecoin on all supported chains
• Circle Faucet — Testnet USDC

Architecture

┌─────────────────────────────────────────────┐
│           OpenClaw Agent (NexBot)            │
│  ┌───────────────────────────────────────┐  │
│  │       nexwave-gateway Skill           │  │
│  │  check-balance │ deposit │ transfer   │  │
│  └───────────┬───────────────────────────┘  │
└──────────────┼──────────────────────────────┘
               │
    ┌──────────┴──────────┐
    ▼                     ▼
┌────────────┐    ┌──────────────────┐
│  Gateway   │    │   Gateway API    │
│  Wallet    │    │  (attestations)  │
│  Contract  │    │  <500ms response │
│ (on-chain) │    │                  │
└────────────┘    └──────────────────┘
    │                     │
    ▼                     ▼
┌──────────────────────────────────┐
│       Gateway Minter Contract    │
│    (mints USDC on dest chain)    │
└──────────────────────────────────┘

Why Gateway > Bridging

	Traditional Bridge	Circle Gateway
Speed	13-19 minutes (Ethereum)	<500ms
Trust	Third-party bridge operators	Circle (USDC issuer)
Liquidity	Fragmented pools	Unified balance
Capital	Pre-positioned per chain	On-demand, any chain
USDC type	Often "wrapped"	Always native USDC

Built By

Nexwave — AI Trading Agent Factory

Built for the USDC Agentic Hackathon on Moltbook.

References

• Circle Gateway Docs
• Gateway Quickstart
• Full Quickstart Code
• Gateway Blog Post
• Machine-to-Machine Micropayments

License

MIT