This project was developed during a Web3 camp with the goal of creating a bridge between the Ethereum and GnoLand networks, enabling the transfer of assets between these two blockchain networks.
The Liberty Bridge is a centralized blockchain bridge that facilitates the transfer of cryptocurrency between the Ethereum (Sepolia) and gno.land networks. The process begins when a user connects their MetaMask wallet to our frontend interface. They then select the type of cryptocurrency they wish to transfer, specify the amount, and provide their address on the destination network before submitting the transaction.
Upon submission, our system invokes the MetaMask API, which transmits the transaction details to our smart contract. The smart contract then executes the transaction and emits an event. Our backend is configured to listen for these events, and upon detection, it processes the information. Using the gno.js library, our backend connects to our wallet on the gno.land network. The system then initiates a call to the Mint function within our Realm, minting new GETH tokens and sending them to the specified address on the gno.land network.
Security and Reliability Enhancements:
We are committed to bolstering the security of our bridge to ensure safe, reliable transactions, eliminating potential exploits and system vulnerabilities.
Development of Custom Banker and EGRC20 Token:
We are designing a custom banker that supports uint256, replacing the current int64, to align with Ethereum standards and enhance flexibility. Additionally, we will develop an EGRC20 token with uint256 support, enabling the handling of larger token amounts and offering improved functionality.
Bi-Directional Bridge Expansion:
We plan to extend the bridge's capabilities to support transactions from gno.land to Ethereum, facilitating seamless, two-way transfers between these platforms.
Transaction Fee Implementation:
To ensure the sustainability of our bridge, we will introduce transaction fees. These fees will be set at a fair and competitive rate, balancing user satisfaction with operational viability.
Enhanced User Experience:
We are dedicated to developing a user interface that is both intuitive and elegant. Our goal is to create a simple, easy-to-navigate frontend that ensures a seamless experience for all users.
Additional Feature Development:
We will continuously explore and implement new features aimed at improving the functionality and overall usability of the bridge.
You can use our pre-deployed smart contract on the Ethereum network with the address 0x6F677442B0cb3E80B39090661a427cf1b1fA0c46 for testing. If you prefer to deploy your own contract, follow the steps below:
Create a .env file in the root directory and set up your environment variables. You can use our example configuration from the .env.example file, or if you prefer, you can use our Ethereum smart contract mentioned above.
Install the required Node.js packages:
npm installdotenv allows you to manage environment variables from the .env file:
npm install dotenvInstall Hardhat, a development environment for Ethereum:
npm install hardhatNote: If you are using our pre-deployed Ethereum smart contract for testing, you can skip steps 5 and 6 below.
If you are deploying your own contract, create a folder named contracts within the backend directory and copy the Bridge.sol file into this folder.
To deploy your own Ethereum smart contract, use the following command:
npx hardhat run scripts/deploy.ts --network sepoliaThis will deploy a new smart contract on the Sepolia network. If you prefer not to deploy your own contract, you can use our pre-deployed smart contract on the Ethereum network with the address 0x6F677442B0cb3E80B39090661a427cf1b1fA0c46 for testing.
Run the listener script on the Sepolia test network:
npx hardhat run ./scripts/listener.ts --network sepoliaIn the frontend root directory, install the necessary packages:
npm installStart the development server:
npm run devDeploy two smart contracts: one on the Ethereum network and one on the GnoLand network. If you don't want to deploy your own GnoLand contract, you can use our pre-deployed smart contract with the address g12x53uevj3plq8fpntp59nr7dvwu3a0gzw74n9f for testing.
If you have deployed your own GnoLand contract, replace the address in the following command with yours. Otherwise, you can use our address:
gnokey query bank/balances/g12x53uevj3plq8fpntp59nr7dvwu3a0gzw74n9f --remote https://rpc.test4.gno.land:443This project was developed by: