Ethereum - Implement standard wallet

[olemis]

Feature description

Ethereum standard wallets

Is your feature request related to a problem? Please describe. Wallet does not support ethereum standar wallets

Describe the solution you'd like Manage wallets similar to geth nodes, a wallet will be conformed by a directory filled with multiple files reprensenting a private key. Keys are stored as encrypted JSON files according to the Web3 Secret Storage specification, see https://github.com/ethereum/wiki/wiki/Web3-Secret-Storage-Definition for more information.

Additional context

TODO: Find a golang library for Ethereum Requires #246

Possible implementation

• [ ] Create standard Ethereum wallets (backend)
• [ ] Create standard Ethereum wallets (GUI)
• [ ] List standard Ethereum wallets
• [ ] Encrypt / decrypt files for standard Ethereum wallet
• [ ] Implement core.Wallet interface
• [ ] Implement core.Signer interface