x/blueaccount: a new message to delete all domain accounts (#1042)

A new message was added `DeleteAllAccountsMsg` to the `x/blueaccount`
extension that allows a domain owner to delete all (except the one with
an empty name) accounts that belong to that domain.

The above message can be used together with a domain transfer message in
order to transfer ownership of a domain without any of the accounts that
might have belonged to it before.

resolve #1036

cmd/bnsd/app/codec.proto

@@ -76,6 +76,7 @@ message Tx {
     blueaccount.ReplaceAccountTargetsMsg blueaccount_replace_account_target_msg = 87;
     blueaccount.DeleteAccountMsg blueaccount_delete_account_msg = 88;
     blueaccount.UpdateConfigurationMsg blueaccount_update_configuration_msg = 89;
+    blueaccount.FlushDomainMsg blueaccount_delete_all_accounts_msg = 90;
   }
 }
 
@@ -112,6 +113,7 @@ message ExecuteBatchMsg {
       blueaccount.ReplaceAccountTargetsMsg blueaccount_replace_account_target_msg = 87;
       blueaccount.DeleteAccountMsg blueaccount_delete_account_msg = 88;
       blueaccount.UpdateConfigurationMsg blueaccount_update_configuration_msg = 89;
+      blueaccount.FlushDomainMsg blueaccount_delete_all_accounts_msg = 90;
     }
   }
   repeated Union messages = 1 [(gogoproto.nullable) = false];
@@ -149,6 +151,7 @@ message ProposalOptions {
     blueaccount.ReplaceAccountTargetsMsg blueaccount_replace_account_target_msg = 87;
     blueaccount.DeleteAccountMsg blueaccount_delete_account_msg = 88;
     blueaccount.UpdateConfigurationMsg blueaccount_update_configuration_msg = 89;
+    blueaccount.FlushDomainMsg blueaccount_delete_all_accounts_msg = 90;
   }
 }
 
@@ -182,6 +185,7 @@ message ExecuteProposalBatchMsg {
       blueaccount.ReplaceAccountTargetsMsg blueaccount_replace_account_target_msg = 87;
       blueaccount.DeleteAccountMsg blueaccount_delete_account_msg = 88;
       blueaccount.UpdateConfigurationMsg blueaccount_update_configuration_msg = 89;
+      blueaccount.FlushDomainMsg blueaccount_flush_domain_msg = 90;
     }
   }
   repeated Union messages = 1 [(gogoproto.nullable) = false];

cmd/bnsd/x/blueaccount/codec.proto

@@ -187,3 +187,11 @@ message DeleteAccountMsg {
   string domain = 2;
   string name = 3;
 }
+
+// FlushDomainMsg issues deletion of all names (except the one with an empty
+// name) that belongs to given domain.
+// Message must be signed by the domain owner.
+message FlushDomainMsg {
+  weave.Metadata metadata = 1;
+  string domain = 2;
+}