imp: remove Version interface and casting functions from 03-connection

docs/ibc/light-clients/localhost/connection.md

@@ -16,7 +16,7 @@ The `ConnectionEnd` and its `Counterparty` both reference the `09-localhost` cli
 // CreateSentinelLocalhostConnection creates and sets the sentinel localhost connection end in the IBC store.
 func (k Keeper) CreateSentinelLocalhostConnection(ctx sdk.Context) {
   counterparty := types.NewCounterparty(exported.LocalhostClientID, exported.LocalhostConnectionID, commitmenttypes.NewMerklePrefix(k.GetCommitmentPrefix().Bytes()))
-  connectionEnd := types.NewConnectionEnd(types.OPEN, exported.LocalhostClientID, counterparty, types.ExportedVersionsToProto(types.GetCompatibleVersions()), 0)
+  connectionEnd := types.NewConnectionEnd(types.OPEN, exported.LocalhostClientID, counterparty, types.GetCompatibleVersions(), 0)
 
   k.SetConnection(ctx, exported.LocalhostConnectionID, connectionEnd)
 }

modules/core/03-connection/keeper/grpc_query_test.go

@@ -54,7 +54,7 @@ func (suite *KeeperTestSuite) TestQueryConnection() {
 				suite.Require().NoError(err)
 
 				counterparty := types.NewCounterparty(path.EndpointB.ClientID, "", suite.chainB.GetPrefix())
-				expConnection = types.NewConnectionEnd(types.INIT, path.EndpointA.ClientID, counterparty, types.ExportedVersionsToProto(types.GetCompatibleVersions()), 500)
+				expConnection = types.NewConnectionEnd(types.INIT, path.EndpointA.ClientID, counterparty, types.GetCompatibleVersions(), 500)
 				suite.chainA.App.GetIBCKeeper().ConnectionKeeper.SetConnection(suite.chainA.GetContext(), path.EndpointA.ConnectionID, expConnection)
 
 				req = &types.QueryConnectionRequest{
@@ -134,9 +134,9 @@ func (suite *KeeperTestSuite) TestQueryConnections() {
 				// counterparty connection id is blank after open init
 				counterparty3 := types.NewCounterparty(path3.EndpointB.ClientID, "", suite.chainB.GetPrefix())
 
-				conn1 := types.NewConnectionEnd(types.OPEN, path1.EndpointA.ClientID, counterparty1, types.ExportedVersionsToProto(types.GetCompatibleVersions()), 0)
-				conn2 := types.NewConnectionEnd(types.OPEN, path2.EndpointA.ClientID, counterparty2, types.ExportedVersionsToProto(types.GetCompatibleVersions()), 0)
-				conn3 := types.NewConnectionEnd(types.INIT, path3.EndpointA.ClientID, counterparty3, types.ExportedVersionsToProto(types.GetCompatibleVersions()), 0)
+				conn1 := types.NewConnectionEnd(types.OPEN, path1.EndpointA.ClientID, counterparty1, types.GetCompatibleVersions(), 0)
+				conn2 := types.NewConnectionEnd(types.OPEN, path2.EndpointA.ClientID, counterparty2, types.GetCompatibleVersions(), 0)
+				conn3 := types.NewConnectionEnd(types.INIT, path3.EndpointA.ClientID, counterparty3, types.GetCompatibleVersions(), 0)
 
 				iconn1 := types.NewIdentifiedConnection(path1.EndpointA.ConnectionID, conn1)
 				iconn2 := types.NewIdentifiedConnection(path2.EndpointA.ConnectionID, conn2)

modules/core/03-connection/keeper/handshake.go

@@ -31,7 +31,7 @@ func (k Keeper) ConnOpenInit(
 			return "", errorsmod.Wrap(types.ErrInvalidVersion, "version is not supported")
 		}
 
-		versions = []exported.Version{version}
+		versions = []*types.Version{version}
 	}
 
 	clientState, found := k.clientKeeper.GetClientState(ctx, clientID)
@@ -49,7 +49,7 @@ func (k Keeper) ConnOpenInit(
 	}
 
 	// connection defines chain A's ConnectionEnd
-	connection := types.NewConnectionEnd(types.INIT, clientID, counterparty, types.ExportedVersionsToProto(versions), delayPeriod)
+	connection := types.NewConnectionEnd(types.INIT, clientID, counterparty, versions, delayPeriod)
 	k.SetConnection(ctx, connectionID, connection)
 
 	k.Logger(ctx).Info("connection state updated", "connection-id", connectionID, "previous-state", types.UNINITIALIZED.String(), "new-state", types.INIT.String())
@@ -73,7 +73,7 @@ func (k Keeper) ConnOpenTry(
 	delayPeriod uint64,
 	clientID string, // clientID of chainA
 	clientState exported.ClientState, // clientState that chainA has for chainB
-	counterpartyVersions []exported.Version, // supported versions of chain A
+	counterpartyVersions []*types.Version, // supported versions of chain A
 	proofInit []byte, // proof that chainA stored connectionEnd in state (on ConnOpenInit)
 	proofClient []byte, // proof that chainA stored a light client of chainB
 	proofConsensus []byte, // proof that chainA stored chainB's consensus state at consensus height
@@ -108,7 +108,7 @@ func (k Keeper) ConnOpenTry(
 	// NOTE: chainA and chainB must have the same delay period
 	prefix := k.GetCommitmentPrefix()
 	expectedCounterparty := types.NewCounterparty(clientID, "", commitmenttypes.NewMerklePrefix(prefix.Bytes()))
-	expectedConnection := types.NewConnectionEnd(types.INIT, counterparty.ClientId, expectedCounterparty, types.ExportedVersionsToProto(counterpartyVersions), delayPeriod)
+	expectedConnection := types.NewConnectionEnd(types.INIT, counterparty.ClientId, expectedCounterparty, counterpartyVersions, delayPeriod)
 
 	// chain B picks a version from Chain A's available versions that is compatible
 	// with Chain B's supported IBC versions. PickVersion will select the intersection
@@ -197,7 +197,7 @@ func (k Keeper) ConnOpenAck(
 	}
 
 	// ensure selected version is supported
-	if !types.IsSupportedVersion(types.ProtoVersionsToExported(connection.Versions), version) {
+	if !types.IsSupportedVersion(connection.Versions, version) {
 		return errorsmod.Wrapf(
 			types.ErrInvalidConnectionState,
 			"the counterparty selected version %s is not supported by versions selected on INIT", version,

modules/core/03-connection/keeper/handshake_test.go

@@ -33,7 +33,7 @@ func (suite *KeeperTestSuite) TestConnOpenInit() {
 			emptyConnBID = true
 		}, true},
 		{"success with non empty version", func() {
-			version = types.ExportedVersionsToProto(types.GetCompatibleVersions())[0]
+			version = types.GetCompatibleVersions()[0]
 		}, true},
 		{"success with non zero delayPeriod", func() {
 			delayPeriod = uint64(time.Hour.Nanoseconds())
@@ -96,7 +96,7 @@ func (suite *KeeperTestSuite) TestConnOpenTry() {
 	var (
 		path               *ibctesting.Path
 		delayPeriod        uint64
-		versions           []exported.Version
+		versions           []*types.Version
 		consensusHeight    exported.Height
 		counterpartyClient exported.ClientState
 	)
@@ -181,7 +181,7 @@ func (suite *KeeperTestSuite) TestConnOpenTry() {
 			counterpartyClient = suite.chainA.GetClientState(path.EndpointA.ClientID)
 
 			version := types.NewVersion("0.0", nil)
-			versions = []exported.Version{version}
+			versions = []*types.Version{version}
 		}, false},
 		{"connection state verification failed", func() {
 			// chainA connection not created
@@ -478,9 +478,9 @@ func (suite *KeeperTestSuite) TestConnOpenAck() {
 	for _, tc := range testCases {
 		tc := tc
 		suite.Run(tc.msg, func() {
-			suite.SetupTest()                                                         // reset
-			version = types.ExportedVersionsToProto(types.GetCompatibleVersions())[0] // must be explicitly changed in malleate
-			consensusHeight = clienttypes.ZeroHeight()                                // must be explicitly changed in malleate
+			suite.SetupTest()                          // reset
+			version = types.GetCompatibleVersions()[0] // must be explicitly changed in malleate
+			consensusHeight = clienttypes.ZeroHeight() // must be explicitly changed in malleate
 			path = ibctesting.NewPath(suite.chainA, suite.chainB)
 			suite.coordinator.SetupClients(path)
 

modules/core/03-connection/keeper/keeper.go

@@ -201,7 +201,7 @@ func (k Keeper) GetAllConnections(ctx sdk.Context) (connections []types.Identifi
 // CreateSentinelLocalhostConnection creates and sets the sentinel localhost connection end in the IBC store.
 func (k Keeper) CreateSentinelLocalhostConnection(ctx sdk.Context) {
 	counterparty := types.NewCounterparty(exported.LocalhostClientID, exported.LocalhostConnectionID, commitmenttypes.NewMerklePrefix(k.GetCommitmentPrefix().Bytes()))
-	connectionEnd := types.NewConnectionEnd(types.OPEN, exported.LocalhostClientID, counterparty, types.ExportedVersionsToProto(types.GetCompatibleVersions()), 0)
+	connectionEnd := types.NewConnectionEnd(types.OPEN, exported.LocalhostClientID, counterparty, types.GetCompatibleVersions(), 0)
 
 	k.SetConnection(ctx, exported.LocalhostConnectionID, connectionEnd)
 }

modules/core/03-connection/keeper/keeper_test.go

@@ -74,8 +74,8 @@ func (suite KeeperTestSuite) TestGetAllConnections() { //nolint:govet // this is
 	counterpartyB0 := types.NewCounterparty(path1.EndpointB.ClientID, path1.EndpointB.ConnectionID, suite.chainB.GetPrefix()) // connection B0
 	counterpartyB1 := types.NewCounterparty(path2.EndpointB.ClientID, path2.EndpointB.ConnectionID, suite.chainB.GetPrefix()) // connection B1
 
-	conn1 := types.NewConnectionEnd(types.OPEN, path1.EndpointA.ClientID, counterpartyB0, types.ExportedVersionsToProto(types.GetCompatibleVersions()), 0) // A0 - B0
-	conn2 := types.NewConnectionEnd(types.OPEN, path2.EndpointA.ClientID, counterpartyB1, types.ExportedVersionsToProto(types.GetCompatibleVersions()), 0) // A1 - B1
+	conn1 := types.NewConnectionEnd(types.OPEN, path1.EndpointA.ClientID, counterpartyB0, types.GetCompatibleVersions(), 0) // A0 - B0
+	conn2 := types.NewConnectionEnd(types.OPEN, path2.EndpointA.ClientID, counterpartyB1, types.GetCompatibleVersions(), 0) // A1 - B1
 
 	iconn1 := types.NewIdentifiedConnection(path1.EndpointA.ConnectionID, conn1)
 	iconn2 := types.NewIdentifiedConnection(path2.EndpointA.ConnectionID, conn2)
@@ -172,7 +172,7 @@ func (suite *KeeperTestSuite) TestLocalhostConnectionEndCreation() {
 	suite.Require().True(found)
 	suite.Require().Equal(types.OPEN, connectionEnd.State)
 	suite.Require().Equal(exported.LocalhostClientID, connectionEnd.ClientId)
-	suite.Require().Equal(types.ExportedVersionsToProto(types.GetCompatibleVersions()), connectionEnd.Versions)
+	suite.Require().Equal(types.GetCompatibleVersions(), connectionEnd.Versions)
 	expectedCounterParty := types.NewCounterparty(exported.LocalhostClientID, exported.LocalhostConnectionID, commitmenttypes.NewMerklePrefix(connectionKeeper.GetCommitmentPrefix().Bytes()))
 	suite.Require().Equal(expectedCounterParty, connectionEnd.Counterparty)
 }

modules/core/03-connection/simulation/decoder_test.go

@@ -22,7 +22,7 @@ func TestDecodeStore(t *testing.T) {
 
 	connection := types.ConnectionEnd{
 		ClientId: "clientidone",
-		Versions: types.ExportedVersionsToProto(types.GetCompatibleVersions()),
+		Versions: types.GetCompatibleVersions(),
 	}
 
 	paths := types.ClientPaths{

modules/core/03-connection/types/codec.go

@@ -22,11 +22,6 @@ func RegisterInterfaces(registry codectypes.InterfaceRegistry) {
 		(*exported.CounterpartyConnectionI)(nil),
 		&Counterparty{},
 	)
-	registry.RegisterInterface(
-		"ibc.core.connection.v1.Version",
-		(*exported.Version)(nil),
-		&Version{},
-	)
 	registry.RegisterImplementations(
 		(*sdk.Msg)(nil),
 		&MsgConnectionOpenInit{},

modules/core/03-connection/types/connection.go

@@ -38,8 +38,8 @@ func (c ConnectionEnd) GetCounterparty() exported.CounterpartyConnectionI {
 }
 
 // GetVersions implements the Connection interface
-func (c ConnectionEnd) GetVersions() []exported.Version {
-	return ProtoVersionsToExported(c.Versions)
+func (c ConnectionEnd) GetVersions() []*Version {
+	return c.Versions
 }
 
 // GetDelayPeriod implements the Connection interface

modules/core/03-connection/types/version.go

@@ -6,7 +6,6 @@ import (
 	errorsmod "cosmossdk.io/errors"
 
 	collections "github.com/cosmos/ibc-go/v7/internal/collections"
-	"github.com/cosmos/ibc-go/v7/modules/core/exported"
 )
 
 var (
@@ -31,8 +30,6 @@ var (
 	}
 )
 
-var _ exported.Version = (*Version)(nil)
-
 // NewVersion returns a new instance of Version.
 func NewVersion(identifier string, features []string) *Version {
 	return &Version{
@@ -73,7 +70,7 @@ func ValidateVersion(version *Version) error {
 // proposed version is supported by this chain. If the feature set is
 // empty it verifies that this is allowed for the specified version
 // identifier.
-func (version Version) VerifyProposedVersion(proposedVersion exported.Version) error {
+func (version Version) VerifyProposedVersion(proposedVersion *Version) error {
 	if proposedVersion.GetIdentifier() != version.GetIdentifier() {
 		return errorsmod.Wrapf(
 			ErrVersionNegotiationFailed,
@@ -102,7 +99,7 @@ func (version Version) VerifyProposedVersion(proposedVersion exported.Version) e
 
 // VerifySupportedFeature takes in a version and feature string and returns
 // true if the feature is supported by the version and false otherwise.
-func VerifySupportedFeature(version exported.Version, feature string) bool {
+func VerifySupportedFeature(version *Version, feature string) bool {
 	for _, f := range version.GetFeatures() {
 		if f == feature {
 			return true
@@ -115,14 +112,14 @@ func VerifySupportedFeature(version exported.Version, feature string) bool {
 // versions for the caller chain's connection end. The latest supported
 // version should be first element and the set should descend to the oldest
 // supported version.
-func GetCompatibleVersions() []exported.Version {
-	return []exported.Version{DefaultIBCVersion}
+func GetCompatibleVersions() []*Version {
+	return []*Version{DefaultIBCVersion}
 }
 
 // IsSupportedVersion returns true if the proposed version has a matching version
 // identifier and its entire feature set is supported or the version identifier
 // supports an empty feature set.
-func IsSupportedVersion(supportedVersions []exported.Version, proposedVersion *Version) bool {
+func IsSupportedVersion(supportedVersions []*Version, proposedVersion *Version) bool {
 	supportedVersion, found := FindSupportedVersion(proposedVersion, supportedVersions)
 	if !found {
 		return false
@@ -138,12 +135,13 @@ func IsSupportedVersion(supportedVersions []exported.Version, proposedVersion *V
 // FindSupportedVersion returns the version with a matching version identifier
 // if it exists. The returned boolean is true if the version is found and
 // false otherwise.
-func FindSupportedVersion(version exported.Version, supportedVersions []exported.Version) (exported.Version, bool) {
+func FindSupportedVersion(version *Version, supportedVersions []*Version) (*Version, bool) {
 	for _, supportedVersion := range supportedVersions {
 		if version.GetIdentifier() == supportedVersion.GetIdentifier() {
 			return supportedVersion, true
 		}
 	}
+
 	return nil, false
 }
 
@@ -158,7 +156,7 @@ func FindSupportedVersion(version exported.Version, supportedVersions []exported
 //
 // CONTRACT: PickVersion must only provide a version that is in the
 // intersection of the supported versions and the counterparty versions.
-func PickVersion(supportedVersions, counterpartyVersions []exported.Version) (*Version, error) {
+func PickVersion(supportedVersions, counterpartyVersions []*Version) (*Version, error) {
 	for _, supportedVersion := range supportedVersions {
 		// check if the source version is supported by the counterparty
 		if counterpartyVersion, found := FindSupportedVersion(supportedVersion, counterpartyVersions); found {
@@ -190,25 +188,3 @@ func GetFeatureSetIntersection(sourceFeatureSet, counterpartyFeatureSet []string
 
 	return featureSet
 }
-
-// ExportedVersionsToProto casts a slice of the Version interface to a slice
-// of the Version proto definition.
-func ExportedVersionsToProto(exportedVersions []exported.Version) []*Version {
-	versions := make([]*Version, len(exportedVersions))
-	for i := range exportedVersions {
-		versions[i] = exportedVersions[i].(*Version)
-	}
-
-	return versions
-}
-
-// ProtoVersionsToExported converts a slice of the Version proto definition to
-// the Version interface.
-func ProtoVersionsToExported(versions []*Version) []exported.Version {
-	exportedVersions := make([]exported.Version, len(versions))
-	for i := range versions {
-		exportedVersions[i] = versions[i]
-	}
-
-	return exportedVersions
-}

modules/core/03-connection/types/version_test.go

@@ -6,7 +6,6 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/cosmos/ibc-go/v7/modules/core/03-connection/types"
-	"github.com/cosmos/ibc-go/v7/modules/core/exported"
 	ibctesting "github.com/cosmos/ibc-go/v7/testing"
 )
 
@@ -41,7 +40,7 @@ func TestIsSupportedVersion(t *testing.T) {
 	}{
 		{
 			"version is supported",
-			types.ExportedVersionsToProto(types.GetCompatibleVersions())[0],
+			types.GetCompatibleVersions()[0],
 			true,
 		},
 		{
@@ -65,14 +64,14 @@ func TestFindSupportedVersion(t *testing.T) {
 	testCases := []struct {
 		name              string
 		version           *types.Version
-		supportedVersions []exported.Version
+		supportedVersions []*types.Version
 		expVersion        *types.Version
 		expFound          bool
 	}{
 		{"valid supported version", types.DefaultIBCVersion, types.GetCompatibleVersions(), types.DefaultIBCVersion, true},
 		{"empty (invalid) version", &types.Version{}, types.GetCompatibleVersions(), &types.Version{}, false},
-		{"empty supported versions", types.DefaultIBCVersion, []exported.Version{}, &types.Version{}, false},
-		{"desired version is last", types.DefaultIBCVersion, []exported.Version{types.NewVersion("1.1", nil), types.NewVersion("2", []string{"ORDER_UNORDERED"}), types.NewVersion("3", nil), types.DefaultIBCVersion}, types.DefaultIBCVersion, true},
+		{"empty supported versions", types.DefaultIBCVersion, []*types.Version{}, &types.Version{}, false},
+		{"desired version is last", types.DefaultIBCVersion, []*types.Version{types.NewVersion("1.1", nil), types.NewVersion("2", []string{"ORDER_UNORDERED"}), types.NewVersion("3", nil), types.DefaultIBCVersion}, types.DefaultIBCVersion, true},
 		{"desired version identifier with different feature set", types.NewVersion(types.DefaultIBCVersionIdentifier, []string{"ORDER_DAG"}), types.GetCompatibleVersions(), types.DefaultIBCVersion, true},
 		{"version not supported", types.NewVersion("2", []string{"ORDER_DAG"}), types.GetCompatibleVersions(), &types.Version{}, false},
 	}
@@ -92,17 +91,17 @@ func TestFindSupportedVersion(t *testing.T) {
 func TestPickVersion(t *testing.T) {
 	testCases := []struct {
 		name                 string
-		supportedVersions    []exported.Version
-		counterpartyVersions []exported.Version
+		supportedVersions    []*types.Version
+		counterpartyVersions []*types.Version
 		expVer               *types.Version
 		expPass              bool
 	}{
 		{"valid default ibc version", types.GetCompatibleVersions(), types.GetCompatibleVersions(), types.DefaultIBCVersion, true},
-		{"valid version in counterparty versions", types.GetCompatibleVersions(), []exported.Version{types.NewVersion("version1", nil), types.NewVersion("2.0.0", []string{"ORDER_UNORDERED-ZK"}), types.DefaultIBCVersion}, types.DefaultIBCVersion, true},
-		{"valid identifier match but empty feature set not allowed", types.GetCompatibleVersions(), []exported.Version{types.NewVersion(types.DefaultIBCVersionIdentifier, []string{"DAG", "ORDERED-ZK", "UNORDERED-zk]"})}, types.NewVersion(types.DefaultIBCVersionIdentifier, nil), false},
-		{"empty counterparty versions", types.GetCompatibleVersions(), []exported.Version{}, &types.Version{}, false},
-		{"non-matching counterparty versions", types.GetCompatibleVersions(), []exported.Version{types.NewVersion("2.0.0", nil)}, &types.Version{}, false},
-		{"non-matching counterparty versions (uses ordered channels only) contained in supported versions (uses unordered channels only)", []exported.Version{types.NewVersion(types.DefaultIBCVersionIdentifier, []string{"ORDER_UNORDERED"})}, []exported.Version{types.NewVersion(types.DefaultIBCVersionIdentifier, []string{"ORDER_ORDERED"})}, &types.Version{}, false},
+		{"valid version in counterparty versions", types.GetCompatibleVersions(), []*types.Version{types.NewVersion("version1", nil), types.NewVersion("2.0.0", []string{"ORDER_UNORDERED-ZK"}), types.DefaultIBCVersion}, types.DefaultIBCVersion, true},
+		{"valid identifier match but empty feature set not allowed", types.GetCompatibleVersions(), []*types.Version{types.NewVersion(types.DefaultIBCVersionIdentifier, []string{"DAG", "ORDERED-ZK", "UNORDERED-zk]"})}, types.NewVersion(types.DefaultIBCVersionIdentifier, nil), false},
+		{"empty counterparty versions", types.GetCompatibleVersions(), []*types.Version{}, &types.Version{}, false},
+		{"non-matching counterparty versions", types.GetCompatibleVersions(), []*types.Version{types.NewVersion("2.0.0", nil)}, &types.Version{}, false},
+		{"non-matching counterparty versions (uses ordered channels only) contained in supported versions (uses unordered channels only)", []*types.Version{types.NewVersion(types.DefaultIBCVersionIdentifier, []string{"ORDER_UNORDERED"})}, []*types.Version{types.NewVersion(types.DefaultIBCVersionIdentifier, []string{"ORDER_ORDERED"})}, &types.Version{}, false},
 	}
 
 	for i, tc := range testCases {