Cross-Chain Bridge

A cross-chain bridge was developed to enable the transfer of digital assets between multiple blockchain networks. The primary goal of the project is to provide a secure, decentralized, and максимально fast token transfer without intermediaries. The solution is implemented as a full-fledged DeFi infrastructure prototype with multi-network support and automated transaction routing via smart contracts and oracle mechanisms.

TECHNICAL IMPLEMENTATION:
• Asset transfers are supported across Ethereum, BNB Smart Chain, Polygon, Arbitrum, and Avalanche.
• Cross-chain communication and message routing are handled using LayerZero, Wormhole, and Axelar protocols.
• An oracle system based on Chainlink is integrated to validate price feeds and transaction states.
• Smart contracts are written in Solidity; deployment and testing are performed using Hardhat with multichain configuration support.
• The ERC-20 standard is used for tokens, with implemented wrapped tokens and bridge contracts for locking and minting assets.
• A relay server built with Node.js (Express) handles event tracking, transaction status processing, and cross-chain synchronization.
• Monitoring is implemented with Prometheus and Grafana, while MongoDB is used for storing logs and transaction states.
• The client-side application is built with React, integrated via Wagmi and RainbowKit, and supports MetaMask and WalletConnect.

RESULT:
• A fully functional MVP enabling bidirectional token transfers across supported networks.
• Average transaction time during devnet testing is up to 30 seconds.
• A multisignature verification system and event logging are implemented to ensure operational transparency.
• The interface automatically detects the user’s network and handles errors in real time.