Simple ping pong bridge example

This repo provides a simple example on how bridge messages between networks

Requirements

• node version: >= 14.x
• npm version: >= 7.x

Deployment

In project root execute:

npm i
cp .env.example .env

Fill .env with your MNEMONIC or PVTKEY and INFURA_PROJECT_ID If you want to verify the contracts also fill the ETHERSCAN_API_KEY and ETHERSCAN_ZKEVM_API_KEY

To deploy use:deploy:pingPong:${network}, currently is supported goerli and mainnet. This script will deploy a contract on 2 networks, a message sender and a message receiver:

• PingSender on mainnet/goerli
• PingReceiver on polygonZKEVMTestnet/polygonZKEVMMainnet

As example for goerli testnet:

npm run deploy:pingPong:goerli

In the deployment we will find the results on pingPong_output.json

To verify contracts use npm run verify:sender:${network} and npm run verify:receiver:${network}

npm run verify:sender:goerli
npm run verify:receiver:polygonZKEVMTestnet

Using the bridge

In order to use the bridge, there are already provided some scripts:

• Send a message using:

npm run bridge:bridgePing:goerli

• Now we have to wait until the message is forwarded to L2, there's the final script that will check it and if it's ready will actually claim the NFT in the other layer:

npm run claim:claimPong:polygonZKEVMTestnet

• You can check that the value pingValue on the PingReceiver had change