package tezos-protocol-020-PsParisC

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This module ensures the following invariants:

registered delegates (i.e. those that appear in Storage.Delegates) are self-delegated, that is a delegate's implicit account delegates to itself (i.e. Contract_delegate_storage.find delegate returns delegate),
registered delegates have their public keys revealed,
registered delegates cannot change their delegation,
stake is properly moved when changing delegation.

type Tezos_protocol_environment_020_PsParisC.Error_monad.error +=

| Active_delegate
| Empty_delegate_account of Tezos_protocol_environment_020_PsParisC.Signature.Public_key_hash.t
| No_deletion of Tezos_protocol_environment_020_PsParisC.Signature.Public_key_hash.t
| Current_delegate

val init : 
  Raw_context.t ->
  Contract_repr.t ->
  Tezos_protocol_environment_020_PsParisC.Signature.Public_key_hash.t ->
  Raw_context.t Tezos_protocol_environment_020_PsParisC.Error_monad.tzresult
    Tezos_protocol_environment_020_PsParisC.Lwt.t

init ctxt contract delegate registers a delegate when creating a contract.

This functions assumes that contract is allocated.

This function returns the Unregistered_delegate error if contract already has a delegate or if delegate is not a registered delegate.

val set : 
  Raw_context.t ->
  Contract_repr.t ->
  Tezos_protocol_environment_020_PsParisC.Signature.Public_key_hash.t option ->
  Raw_context.t Tezos_protocol_environment_020_PsParisC.Error_monad.tzresult
    Tezos_protocol_environment_020_PsParisC.Lwt.t

set ctxt contract delegate_opt allows to set the delegate of a contract to delegate when delegate_opt = Some delegate or to unset the delegate when delegate_opt = None. When delegate_opt = Some contract (aka self-delegation), the function also registers the contract as a delegate and sets the delegate as active.

It returns the Unregistered_delegate error when self-delegating and when the public key is not yet revealed. It returns the Empty_delegate_account error when self-delegating and the implicit account is not allocated. It returns the Active_delegate error when self-delegating and the delegate is already active. It returns the Unregistered_delegate error when trying to set the delegate to an unregistered delegate. It returns the Current_delegate error when contract is already delegated to the same delegate. It returns the No_deletion error when trying to unset or change the delegate of a registered delegate.