feat: add goat plugin

[0xaguspunk]

Relates to:

#735
#644

Risks

Low

Background

What does this PR do?

Goat is an open-source framework for connecting AI agents to any onchain app.

This PR demonstrates how to integrate Goat with Eliza, enabling AI agents to execute a wide range of onchain actions with minimal effort. Using Goat’s plugin system, developers can enable agents to:

• Mint NFTs on Zora
• Swap tokens on Uniswap
• Place bets on Polymarket
  all with just a single line of code.

The framework supports multichain by either defining actions for a specific set of chains or dynamically selecting chains per action.

This concrete example simply enables transferring and checking the balance for USDC and ETH on the Base network.

What kind of change is this?

Features (non-breaking change which adds functionality)

Why are we doing this? Any context or related work?

Enable to easily add more onchain capabilities by leveraging Goat.

Documentation changes needed?

My changes do not require a change to the project documentation.

Testing

Where should a reviewer start?

1. Go to plugin-goat

Detailed testing steps

1. Make sure you have an EVM_PRIVATE_KEY, EVM_PUBLIC_KEY and EVM_PROVIDER_URL for Base set
2. Add plugin-goat to the dependencies of the package.json from the agent dir
3. Import it in agent/src/index.ts, exchange it for the evmPlugin
4. Run the agent and prompt it with: What's the USDC balance of 0x18Bead774f927Af586F86F6d054C269416E163DD
5. Should give you the balance of 0x18Bead774f927Af586F86F6d054C269416E163DD

To test actions on Base Sepolia simply:

1. Go to plugin-goat/src/index.ts and change

chain: {
    type: "evm",
    id: base.id,
}, 

to

chain: {
    type: "evm",
    id: sepolia.id, // including the viem import
}, 

2. Go to the plugin-goat/src/wallet.ts file and do the same
3. Make sure EVM_PROVIDER_URL works for Sepolia
4. Run the agent!

Discord username

aguspunk

[monilpat]

LGTM outside of addressing comments great work :)

[monilpat]

I would recommend generateObjectV2 instead as it is much more deterministic

[0xaguspunk]

Neat! 😄 Just moved to that!! Thanks for the rec 🙏

[monilpat]

should this be hardcoded or can we configure it?

[0xaguspunk]

It could be added as an .env variable but we would need a map from string to viem object which would still require you to change the code if you want to use a chain that is not contemplated in the map.

I centralized the definition inside provider.ts to make it easier to update 😄

Would that work?

[0xaguspunk]

@monilpat I moved to generateObjectV2 and added a wallet provider. Let me know if this works 🙌

Thank you for the review!