feat: add readContract / invokeContract functionality to Coinbase plugin

[monilpat]

Features

Contract Interactions

• Introduced readContractAction for reading data from deployed smart contracts
• Added ReadContractContent interface and ReadContractSchema for input validation
• Integrated readContractTemplate to guide users in extracting necessary details for read operations
• Enhanced existing contract interaction capabilities in tokenContractPlugin with invokeContractAction now relying on networkId, amount as a string, and required assetId

Technical Details

New Types

interface ReadContractContent {
    contractAddress: `0x${string}`;
    method: string;
    networkId: string; // Network now identified by networkId (e.g. "ethereum-mainnet")
    args?: Record<string, any>;
    abi?: any[];
}

• ReadContractSchema added for validating read operations:
  • Validates contractAddress, method, networkId, args, and optional abi

Updated Invocation Schema

• network replaced by networkId to align with Coinbase SDK requirements
• amount now handled as a string to support large values without precision loss
• assetId is now required for payable contract methods

Templates

• readContractTemplate: Guides extracting details (contractAddress, method, networkId, args, abi) for reading contract data
• tokenContractTemplate & contractInvocationTemplate: Enhanced for clarity and alignment with updated schema fields

Actions

• readContractAction: Reads data (view/pure methods) from deployed smart contracts
• invokeContractAction: Invokes contract methods; updated to use networkId, amount as a string, and a required assetId
• deployTokenContractAction: Deploys token contracts as before, now compatible with the updated schemas

Testing

Contract Reading

• Tested reading ERC20 balances and contract state variables
• Validated network support via networkId
• Ensured error handling for invalid contracts, addresses, and unsupported networks

Invocation and Deployment

• Confirmed invocation succeeds with the updated networkId approach
• Verified that amount as a string and mandatory assetId don't break existing flows

Reading contract:

Invoking contract:

https://drive.google.com/file/d/16VtpCI7q8J4opco9jQO3XQdwZMb0u-Yz/view?usp=sharing

Risks

• Low: Reading contract data is read-only, minimal risk
• Medium: Contract invocation involves real transactions
  • Mitigation: Added balance checks, improved error handling, and validation through ReadContractSchema

Documentation

• Documentation updated to reflect new readContractAction, networkId field, and schema changes
• Added examples showcasing how to read contract data and invoke contract methods with the new parameters

Deploy Notes

• No database changes required
• Compatible with existing configurations
• Requires adjustments to references of network to networkId in configurations and calls
• Ensure Coinbase API credentials are properly set before reading or invoking contracts