Cross-Chain Signature Verification

A cross-chain verification system that allows a user to sign a message using their Ethereum private key, then later verify the signer’s public key on the Solana blockchain.
This bridges authentication across chains, enabling trustless verification without centralized intermediaries.

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🚀 How It Works

1. Message Signing (Ethereum)

• The user connects their Ethereum wallet (e.g., MetaMask).
• They sign a message using their Ethereum private key.
• The signature is stored or shared for later verification.

2. Public Key Recovery

• Using the signed message and signature, the public key is recovered off-chain.
• The recovered public key proves ownership of the Ethereum account.

3. Verification on Solana

• The recovered public key is submitted to a Solana program.
• The Solana contract verifies that the provided public key matches the signed message, ensuring the signer is authentic.

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🖥️ Tech Stack

• Frontend: React, Tailwind CSS
• Ethereum Signing: ethers.js
• Cryptography: ECDSA (secp256k1) for Ethereum signature recovery

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📦 Installation

git clone https://github.com/LOSTBOY-IS-DED/Cross-chain-verification.git
cd sigBridge/frontend
pnpm install
pnpm dev