fix: add MetaMask Provider Detection and Initialization for MetaMaskSnapWallet

khanti42 commented 3 weeks ago

This PR fixes #268

It enhances the MetaMaskSnapWallet implementation by adding support for detecting and initializing a MetaMask provider. Key changes include:

Introducing a MetaMaskProvider interface and related utility functions (isMetaMaskProvider, getProvider, detectMetaMaskProvider, and waitForMetaMaskProvider) to handle MetaMask provider detection and initialization.
Modifying the MetaMaskSnapWallet class to utilize the new provider detection logic, ensuring the wallet initializes with a valid MetaMask provider.
Updating the init method in MetaMaskSnapWallet to asynchronously fetch and assign the MetaMask provider.
Adjusting tests to reflect these changes.

These improvements ensure that the MetaMaskSnapWallet can robustly detect and initialize MetaMask providers, enhancing the reliability and usability of the MetaMask integration. This update makes the get-starknet integration as minimalist as possible and facilitates further interaction with the starknet/get-starknet repo.