feat(x/staking): implement RotateConsPubKey method (#18188)

proto/cosmos/staking/v1beta1/staking.proto

@@ -415,7 +415,7 @@ message ConsPubKeyRotationHistory {
   option (gogoproto.goproto_getters) = false;
 
   // operator_address defines the address of the validator's operator; bech encoded in JSON.
-  string operator_address = 1;
+  bytes operator_address = 1;
   // old_cons_pubkey is the old consensus public key of the validator, as a Protobuf Any.
   google.protobuf.Any old_cons_pubkey = 2 [(cosmos_proto.accepts_interface) = "cosmos.crypto.PubKey"];
   // new_cons_pubkey is the new consensus public key of the validator, as a Protobuf Any.
@@ -429,5 +429,5 @@ message ConsPubKeyRotationHistory {
 // ValAddrsOfRotatedConsKeys contains the array of validator addresses which rotated their keys
 // This is to block the validator's next rotation till unbonding period.
 message ValAddrsOfRotatedConsKeys {
-  repeated string addresses = 1 [(cosmos_proto.scalar) = "cosmos.AddressString"];
+  repeated bytes addresses = 1 [(cosmos_proto.scalar) = "cosmos.AddressString"];
 }

proto/cosmos/staking/v1beta1/tx.proto

@@ -48,7 +48,7 @@ service Msg {
 
   // RotateConsPubKey defines an operation for rotating the consensus keys
   // of a validator.
-  // Since: cosmos-sdk 0.48
+  // Since: cosmos-sdk 0.51
   rpc RotateConsPubKey(MsgRotateConsPubKey) returns (MsgRotateConsPubKeyResponse);
 }