Today I added Metamask integration to my app using React Context. The context wraps the entire app, allowing every component to access functions and wallet information to interface with Metamask and the Ethereum blockchain. It is important for us to wrap everything in try and catch blocks, and to include backups if the browser does not have Metamask installed. This is achieved by checking the window for the ethereum object. If this object is present, we can use the ethers library to pull the injected web3 provider and signer, and have these interact with our deployed contract given the ABI and address. The ethereum object has methods that allow us to request the eth accounts and then assign them to a state variable. The connected account is then passed as a value in the context. This allows our frontend to display the ethereum address of the connected metamask wallet.
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