OP Devnet Bridge

This repo implements a simple bridging interface for depositing to and withdrawing from OP L2 devnet.

Installation and setup

Define env vars

Clone .env.example to .env and set the environment variables for L1 and L2 chains.

cp .env.example .env

Note NEXT_PUBLIC_L1_MULTICALL3_ADDRESS is set in the next step.

Installing multicall3

The withdraw call uses multicall3 to batch multiple methods in a single call.

To deploy the contract, first install Foundry:

curl -L https://foundry.paradigm.xyz | bash
foundryup

Clone the multicall3 repo and build the contract:

git clone https://github.com/mds1/multicall.git
cd multicall
forge build

Deploy the contract, specifying the L1 RPC URL and private key of the funded L1 deployer:

forge create --rpc-url $L1_RPC_URL --private-key $PRIVATE_KEY Multicall3

If the deployment was successful, you should see a similar output as the following:

Deployer: 0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266
Deployed to: 0x4C4a2f8c81640e47606d3fd77B353E87Ba015584
Transaction hash: 0xe51086815a32b04b776f1959a722298e95206d63d55dfe6e84d89b0aaa40cf61

Set NEXT_PUBLIC_L1_MULTICALL3_ADDRESS in .env to the address of the deployed contract.

Starting the bridging app.

Install dependencies and run the development server.

yarn install
yarn dev

To build and run the app:

yarn build
yarn start