KeySpring Demo (Ika Cross-Chain Wallet Demo)

Create an Ethereum wallet from any browser wallet and send ETH on Base Sepolia — all non-custodially using Ika's distributed key generation.

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⚠️ Testnet Only — Developer Warning

This cross-chain wallet demo is provided for developer testing and educational purposes only and must be used on Base Sepolia testnet only (not mainnet).

It has not been audited and may contain bugs or unexpected behavior. Do not use it with real funds or production wallets. Use only test keys and disposable testnet amounts.

You assume all risk by proceeding.

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What This Demo Shows

This demo showcases how Ika enables cross-chain wallet creation. Using your existing wallet (MetaMask, Phantom, etc.), you can:

1. Create a new Ethereum address — derived through distributed key generation on the Ika network
2. Send ETH transactions — sign and broadcast to Base Sepolia testnet
3. Stay non-custodial — your secret share never leaves your browser

The Magic

• Connect with a Solana wallet → get an Ethereum address
• Connect with MetaMask → get a new, separate Ethereum address
• Your existing wallet signs once to derive encryption keys, then Ika's DKG creates your new wallet

Try It Out

1. Start the Backend

cd backend
bun install

# Set your Sui admin key
export SUI_ADMIN_SECRET_KEY="your-base64-encoded-key"
export IKA_COIN_ID="your-ika-coin-id" # used for gas

bun run dev

2. Start the Frontend

cd frontend
bun install
bun run dev

3. Use the Demo

1. Open http://localhost:3000
2. Connect your wallet (MetaMask, Phantom, etc.)
3. Click "Create Wallet" and sign the message
4. Wait for your new Ethereum address to be generated
5. Fund it with Base Sepolia testnet ETH
6. Send a transaction!

How It Works

Your Wallet                    Ika Network                   Base Sepolia
    │                              │                              │
    │  1. Sign message             │                              │
    │─────────────────────────────▶│                              │
    │                              │                              │
    │  2. DKG creates dWallet      │                              │
    │◀─────────────────────────────│                              │
    │                              │                              │
    │  3. You get ETH address      │                              │
    │  (derived from dWallet)      │                              │
    │                              │                              │
    │  4. Sign tx locally          │                              │
    │  (secret never leaves)       │                              │
    │─────────────────────────────▶│                              │
    │                              │                              │
    │  5. Ika completes signature  │  6. Broadcast tx             │
    │                              │─────────────────────────────▶│
    │                              │                              │
    │  7. TX confirmed!            │◀─────────────────────────────│
    │◀─────────────────────────────│                              │

Key Points

• Non-custodial: Your secret key share is computed in your browser and never sent to any server
• Cross-chain: Use any wallet to control an Ethereum address
• Secure: Based on Ika's Zero-Trust dWallet model

Supported Wallets

Wallet	Type	Works?
MetaMask	Ethereum	✅
Phantom (Ethereum)	Ethereum	✅
Phantom (Solana)	Solana	✅
Other Solana wallets	Solana	✅

Configuration

Backend Environment

Variable	Description	Default
PORT	Server port	3001
SUI_ADMIN_SECRET_KEY	Base64-encoded Ed25519 key	Required
SUI_NETWORK	testnet or mainnet	testnet

Frontend Environment

Variable	Description	Default
NEXT_PUBLIC_API_URL	Backend URL	http://localhost:5153
NEXT_PUBLIC_ADMIN_ADDRESS	Sui admin address for DKG	Required

Learn More

• Ika Documentation
• Zero-Trust dWallet
• Get Base Sepolia ETH