implicit account VP

[tzemanovic]

Add a VP for implicit account addresses. This should be used for all the implicit accounts (related to anoma/anoma#186)

┆Issue is synchronized with this Asana task by Unito

[tzemanovic]

We'll need a way to "reveal" a public key for an implicit account (write its public key in its account's sub-space in the ledger). Implicit account has to have its public key revealed in order to authorize actions on itself. For example, the DKG "wrapper" Tx will need to be signed by the implicit source account address (that pays for the wrapper gas).

[tzemanovic]

We'll need a way to "reveal" a public key for an implicit account

Currently, we have the field pk: PublicKey inside the struct WrapperTx. We could change the field to use e.g.:

enum AddressOrPk { Addr(Address), Pk(PublicKey) }

and then for

• Pk write the PK into the storage of the address derived from the PK (ignore if it's already set)
• Addr use the previously revealed PK from storage (fail if it's not been revealed)