MetaMask Snaps Explained

What is MetaMask Snaps?

MetaMask Snaps are plugins created by third-party developers to enhance your MetaMask wallet. They can interact with non-EVM (Ethereum Virtual Machine) blockchains, allowing you to manage assets, execute transactions, and use smart contracts across various blockchain networks from within MetaMask.

These plugins run in a secure, sandboxed environment, ensuring they do not compromise your wallet's security. This setup allows MetaMask to support a wider range of blockchain ecosystems while maintaining a high level of security.

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How do Snaps Work?

MetaMask Snaps are JavaScript programs running in a secure, isolated environment. This open-source system safely extends MetaMask's capabilities, enabling new web3 experiences. Key aspects include:

• Permissions: Snaps begin with no permissions and must request specific ones from the user, such as network access, data storage, or UI interaction.
• APIs: Snaps interact with MetaMask via the Snaps API and selected MetaMask JSON-RPC API methods. They can also create custom JSON-RPC APIs for communication with dapps and other Snaps.
• User Interface: Users manage Snaps through MetaMask's settings, viewing manifest data, execution status, and toggling enable/disable options. Snaps mainly rely on companion dapps for data presentation, with limited UI interaction within MetaMask.
• Lifecycle: Snaps activate in response to messages or events and shut down when idle. MetaMask can force a Snap to shut down if it becomes unresponsive due to inactivity or prolonged processing.

Overall, MetaMask Snaps enhance wallet functionality, supporting a broader range of protocols, dapps, and services.

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What Chains Support MetaMask Snaps?

MetaMask Snaps enhances user interaction with a diverse range of blockchain ecosystems, supporting multiple chains and protocols for a versatile experience. Key supported chains include:

• Mina Protocol: Access via MinaPortal Snap, facilitating interactions with its succinct blockchain.
• Starknet: Through ConsenSys Snap, it integrates Starknet's layer-2 scaling solution for Ethereum.
• NEAR Protocol: The @near-snap/plugin enables integration with NEAR's scalable platform.
• Solana: Using Solflare Wallet, users can engage with Solana's high-performance blockchain for dapps and trading.
• Cosmos: The @leapwallet/metamask-cosmos-snap and @cosmsnap/snap connect users to Cosmos' interchain ecosystem.
• Algorand: With @algorandfoundation/algorand-metamask-snap, it provides access to Algorand's secure blockchain.
• Bitcoin : The ShapeShift Multichain Snap integrates Bitcoin, Dogecoin, Litecoin, and more into MetaMask.

MetaMask Snaps also explores advanced fields like decentralized identity and zero-knowledge proofs, with tools like Masca, EthSign Keychain, and RariMe enhancing security and privacy. For a comprehensive selection of plugins, visit the MetaMask Snaps App Store, where users can discover extensions designed to enrich their blockchain experience.

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Are Snaps Safe?

The safety of MetaMask Snaps primarily relies on the quality and integrity of the developers' code. While MetaMask is built with robust security measures, Snaps are third-party extensions that may introduce vulnerabilities or malicious behavior. To ensure safety, install Snaps only from trusted sources and exercise caution when granting permissions.

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How to Deploy a MetaMask Snap

To deploy a MetaMask Snap, follow these steps:

1. Set Up Development Environment: Begin by configuring your development environment with the necessary tools and dependencies.
2. Write the Snap: Develop the Snap using JavaScript and MetaMask's SDK. Ensure your code adheres to the required standards and functionalities.
3. Local Testing: Test the Snap locally to verify its performance and functionality.
4. Bundle the Snap: Once tested, bundle your Snap into a JavaScript file.
5. Upload to Public Server: Upload the bundled Snap to a public server accessible by users.
6. Configure MetaMask: Adjust MetaMask settings to enable user installations of your Snap.

For a comprehensive guide, refer to the official MetaMask Snaps documentation.

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Bottom Line

In conclusion, MetaMask Snaps significantly enhance the MetaMask wallet by enabling interaction with a diverse array of blockchain networks and extending functionality through secure, third-party plugins. These JavaScript-based extensions operate in a sandboxed environment, ensuring the wallet's security while offering expanded capabilities. To ensure safe usage, always install Snaps from reputable sources and carefully manage permissions.