Add key store related functions to the Key module.

[joojis]

• getKeyStore(): Promise<KeyStore>

Get a list

• getPlatformAddresses(params?: { keyStore?: KeyStore }): Promise<PlatformAddress[]>
• getAssetTransferAddresses(params?: { keyStore?: KeyStore }): Promise<AssetTransferAddresses[]>

Remove an address

• removeAddress(address: PlatformAddressValue | AssetTransferAddressValue, params?: { keyStore?: KeyStore }): Promise<void>

Check existence

• checkAddress(address: PlatformAddressValue | AssetTransferAddressValue, params?: { keyStore?: KeyStore }): Promise<boolean>