XRoute

1. Tezos:

We created a cross-chain bridge implementation, which provides a solution for executing 1inch Fusion+ cross-chain orders between Tezos and Ethereum networks.

Features:

• Hashlock and timelock functionality - preserved on the Tezos side to ensure secure cross-chain transactions
• Signature verification - implemented on the Tezos side for validating swap requests
• Bidirectional swaps - token swaps are supported in both directions (Tezos ↔ Ethereum)
• On-chain execution - deployed and tested on Tezos Ghostnet and Local EVM Node
• Resolver server - a lightweight resolver implemented to launch cross-chain order execution
• User interface - console application for easy interaction

Components::

• Smart contracts deployed on both EVM-compatible chains and Tezos
• A resolver service that receives cross-chain orders from clients and executes them on Tezos and Ethereum
• A command-line interface application that allows users to swap tokens between Tezos and Ethereum networks

1. Etherlink:

The project integrates Etherlink with 1inch Fusion+ protocol by implementing a custom resolver that enables cross-chain token swaps with automatic routing through Etherlink's DEX aggregator.

Features: The resolver automatically detects when tokens differ between source and destination chains, calls the Etherlink aggregator API to get optimal swap routes, prepares approve + swap calldata, and executes everything atomically in a single transaction. This enables seamless cross-chain swaps like ETH USDC → Etherlink WBTC with the best available rates.

Components:

• Resolver implementation and testing framework
• Solidity smart contracts extending 1inch's base resolver with arbitraryCalls functionality
• 1inch Cross-Chain SDK for order creation and escrow management
• Custom API integration for swap route optimization on Etherlink

1. Tezos

Key technologies:

• Node.js + TypeScript - for type safety and easier debugging across all packages
• CameLIGO - for writing smart contracts on Tezos with strong typing
• prool - for testing EVM contracts locally
• Taquito - for interacting with Tezos blockchain from Node.js
• ethers.js - for handling Ethereum transactions and smart contract calls
• Express - for building a simple API for the resolver service
• @1inch/cross-chain-sdk - for creating and validating cross-chain orders the 1inch way

1. Etherlink

Key technologies:

• TypeScript/Node.js for the resolver implementation and testing framework
• Solidity: Enhanced resolver contract with deployDst(targets[], callsData[]) for complex operations
• 1inch Cross-Chain SDK for order creation and escrow management
• Custom API integration for swap route optimization on Etherlink
• Ethers.js for blockchain interactions and transaction handling

Built with comprehensive test coverage using Jest and Prool for local blockchain forking, ensuring reliability for mainnet deployment.