Migrate keystore to Metamask eth-keyring-controller

[hashmesan]

Motivation

To improve security of the storage, I'm proposing to use eth-keyring-controller which provides a unified enclave like way to sign transaction. The enclave/controller prevents any leakage of privateKey, stores multiple type of keyring in a standard way, and provide proper lock & unlock (Lock removes all the private key in memory store, which makes secure!)

Tasks

• evaluate the impact on the code
• need event passing between popup & background for add/remove wallet, and get wallets
• migrate function
• migrate UI
• add wallet functionality
• serialization of keyring-controller and meta data
• integrate wallets to the wallet menu UI
• integrate wallets to export UI
• integrate wallets to create UI
• integrate wallets to import UI
• signing transaction
• test with stake/unstake
• personal sign
• lock / unlock functionality
• regression testing on app
• test for injected script (API)
• alpha testing
• build & release

[hypnagonia]

@hashmesan nice proposal. we cease further wallet development and plan to migrate users to other wallets