📄️ About the Wallet APILearn about the MetaMask Ethereum provider API and JSON-RPC API.📄️ About the Multichain APILearn about the Multichain API.📄️ Convenience librariesLearn about convenience libraries.📄️ Signing methodsLearn about the RPC methods for signing transactions in MetaMask.📄️ Wallet interoperabilityLearn about wallet interoperability via EIP-6963.📄️ Smart contractsLearn about interacting with smart contracts.