27 lines
1.7 KiB
Markdown
27 lines
1.7 KiB
Markdown
# EVM Messenger
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Simple messenger project that sends a "Hello World" message between two EVM chains using Wormhole.
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## Dependencies
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This project uses Foundry to compile and deploy EVM contracts. You can find install instructions at [`https://getfoundry.sh`](http://getfoundry.sh)
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The javascript dependencies can be installed via `npm install` in this folder.
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## Test Scripts
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After you have Guardiand running (you can use the [wormhole-local-validator](https://github.com/wormhole-foundation/xdapp-book/tree/main/projects/wormhole-local-validator), you can run the basic test with `npm run test`. This will:
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- Deploy a simple Messenger contract (found in chains/evm/src/Messenger.sol) to each EVM chain
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- Register each contract with the other chain
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- Send a message from each contract
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- Fetch the VAA from the Guardian
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- Submit the VAA to each contract
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- Print out the Message
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If everything goes correctly, you should get a printout with the Hello World messages on each chain.
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## Common Errors
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### Nonce Issues
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If you see transactions failing due to nonce mismatch errors, restart your local evm chain. If using the [wormhole-local-validator](https://github.com/wormhole-foundation/xdapp-book/tree/main/projects/wormhole-local-validator), just rerun `npm run evm` and then retry `npm run test`.
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This is intermittent and likely caused by the js lib and evm chain being out of sync.
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### Transaction Underpriced Issues
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Transactions failing with the message `transaction underpriced` is an intermittent issue. Restart the evm chains and rerun `npm run test`. If the issue persists, you may need to manually set gas prices when calling the Messenger contract in the `send_msg` logic in `orchestrator.js`. |