Hello Wormhole

Init and test locally

git clone https://github.com/wormhole-foundation/hello-wormhole.git
cd hello-wormhole

There is a bug in the package json, change

"typechain": "typechain --target ethers-v5 --out-dir ./ts-scripts/ethers-contracts ./out/**/*.json"

Into

"typechain": "typechain --target ethers-v5 --out-dir ./ts-scripts/ethers-contracts ./out/**/*.sol/*.json"

npm run build
forge test

Deploy to testnet

1. Obtain testnet AVAX here
2. Obtain testnet CELO here

EVM_PRIVATE_KEY=your_wallet_private_key npm run deploy

Explanation of the HelloWormhole Cross-chain Contract

In the source chain’s contract, you need to have these codes that send message to the wormholeRelayer

wormholeRelayer.sendPayloadToEvm{value: cost}(
            targetChain,
            targetAddress,
            payload,
            0, // no receiver value needed
            GAS_LIMIT
        );

In the target chain, wormhole relayer will find the targetAddress contract and call it’s receiveWormholeMessages method to send message to the target contract address on the target chain.

refs

https://docs.wormhole.com/wormhole/quick-start/tutorials/hello-wormhole