fix: add equivocation proposal message back in protos

proto/interchain_security/ccv/provider/v1/provider.proto

@@ -10,6 +10,7 @@ import "google/protobuf/duration.proto";
 import "ibc/core/client/v1/client.proto";
 import "ibc/lightclients/tendermint/v1/tendermint.proto";
 import "tendermint/crypto/keys.proto";
+import "cosmos/evidence/v1beta1/evidence.proto";
 import "cosmos/base/v1beta1/coin.proto";
 
 // ConsumerAdditionProposal is a governance proposal on the provider chain to spawn a new consumer chain.
@@ -85,6 +86,22 @@ message ConsumerRemovalProposal {
         [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
  } 
 
+// EquivocationProposal is a governance proposal on the provider chain to
+// punish a validator for equivocation on a consumer chain.
+// 
+// This type is only used internally to the consumer CCV module.  
+// WARNING: This message is deprecated now that equivocations can be submitted
+// and verified automatically on the provider. (see SubmitConsumerDoubleVoting in proto/interchain-security/ccv/provider/v1/tx.proto).
+message EquivocationProposal {
+  option deprecated = true;
+  // the title of the proposal
+  string title = 1;
+// the description of the proposal
+  string description = 2;
+  // the list of equivocations that will be processed
+  repeated cosmos.evidence.v1beta1.Equivocation equivocations = 3;
+}
+
 // ChangeRewardDenomsProposal is a governance proposal on the provider chain to
 // mutate the set of denoms accepted by the provider as rewards.
 message ChangeRewardDenomsProposal {

third_party/proto/cosmos/evidence/v1beta1/evidence.proto

@@ -0,0 +1,21 @@
+syntax = "proto3";
+package cosmos.evidence.v1beta1;
+
+option go_package            = "github.com/cosmos/cosmos-sdk/x/evidence/types";
+option (gogoproto.equal_all) = true;
+
+import "gogoproto/gogo.proto";
+import "google/protobuf/timestamp.proto";
+
+// Equivocation implements the Evidence interface and defines evidence of double
+// signing misbehavior.
+message Equivocation {
+  option (gogoproto.goproto_stringer) = false;
+  option (gogoproto.goproto_getters)  = false;
+  option (gogoproto.equal)            = false;
+
+  int64                     height            = 1;
+  google.protobuf.Timestamp time              = 2 [(gogoproto.nullable) = false, (gogoproto.stdtime) = true];
+  int64                     power             = 3;
+  string                    consensus_address = 4 [(gogoproto.moretags) = "yaml:\"consensus_address\""];
+}

x/ccv/provider/types/codec.go

@@ -27,25 +27,22 @@ func RegisterInterfaces(registry codectypes.InterfaceRegistry) {
 		(*sdk.Msg)(nil),
 		&MsgAssignConsumerKey{},
 	)
+	registry.RegisterImplementations(
+		(*govtypes.Content)(nil),
+		&EquivocationProposal{},
+	)
 	registry.RegisterImplementations(
 		(*govtypes.Content)(nil),
 		&ChangeRewardDenomsProposal{},
 	)
-
 	registry.RegisterImplementations(
 		(*sdk.Msg)(nil),
 		&MsgSubmitConsumerMisbehaviour{},
 	)
-
 	registry.RegisterImplementations(
 		(*sdk.Msg)(nil),
 		&MsgSubmitConsumerDoubleVoting{},
 	)
-	registry.RegisterImplementations(
-		(*govtypes.Content)(nil),
-		&ChangeRewardDenomsProposal{},
-	)
-
 	msgservice.RegisterMsgServiceDesc(registry, &_Msg_serviceDesc)
 }
 

x/ccv/provider/types/proposal.go

@@ -1,13 +1,14 @@
 package types
 
 import (
+	"errors"
 	"fmt"
 	"strings"
 	time "time"
 
 	errorsmod "cosmossdk.io/errors"
-
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	evidencetypes "github.com/cosmos/cosmos-sdk/x/evidence/types"
 	govtypes "github.com/cosmos/cosmos-sdk/x/gov/types"
 	clienttypes "github.com/cosmos/ibc-go/v4/modules/core/02-client/types"
 	ccvtypes "github.com/cosmos/interchain-security/v2/x/ccv/types"
@@ -16,18 +17,21 @@ import (
 const (
 	ProposalTypeConsumerAddition   = "ConsumerAddition"
 	ProposalTypeConsumerRemoval    = "ConsumerRemoval"
+	ProposalTypeEquivocation       = "Equivocation"
 	ProposalTypeChangeRewardDenoms = "ChangeRewardDenoms"
 )
 
 var (
 	_ govtypes.Content = &ConsumerAdditionProposal{}
 	_ govtypes.Content = &ConsumerRemovalProposal{}
+	_ govtypes.Content = &EquivocationProposal{}
 	_ govtypes.Content = &ChangeRewardDenomsProposal{}
 )
 
 func init() {
 	govtypes.RegisterProposalType(ProposalTypeConsumerAddition)
 	govtypes.RegisterProposalType(ProposalTypeConsumerRemoval)
+	govtypes.RegisterProposalType(ProposalTypeEquivocation)
 	govtypes.RegisterProposalType(ProposalTypeChangeRewardDenoms)
 }
 
@@ -196,6 +200,40 @@ func (sccp *ConsumerRemovalProposal) ValidateBasic() error {
 	return nil
 }
 
+// NewEquivocationProposal creates a new equivocation proposal.
+// [DEPRECATED]: do not use
+func NewEquivocationProposal(title, description string, equivocations []*evidencetypes.Equivocation) govtypes.Content {
+	return &EquivocationProposal{
+		Title:         title,
+		Description:   description,
+		Equivocations: equivocations,
+	}
+}
+
+// ProposalRoute returns the routing key of an equivocation  proposal.
+func (sp *EquivocationProposal) ProposalRoute() string { return RouterKey }
+
+// ProposalType returns the type of a equivocation proposal.
+func (sp *EquivocationProposal) ProposalType() string {
+	return ProposalTypeEquivocation
+}
+
+// ValidateBasic runs basic stateless validity checks
+func (sp *EquivocationProposal) ValidateBasic() error {
+	if err := govtypes.ValidateAbstract(sp); err != nil {
+		return err
+	}
+	if len(sp.Equivocations) == 0 {
+		return errors.New("invalid equivocation proposal: empty equivocations")
+	}
+	for i := 0; i < len(sp.Equivocations); i++ {
+		if err := sp.Equivocations[i].ValidateBasic(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 func NewChangeRewardDenomsProposal(title, description string,
 	denomsToAdd, denomsToRemove []string,
 ) govtypes.Content {