feat: add AppModuleBasic for tendermint client

docs/migrations/v6-to-v7.md

@@ -13,7 +13,29 @@ There are four sections based on the four potential user groups of this document
 
 ## Chains
 
-- No relevant changes were made in this release.
+### Light client registration
+
+Chains must explicitly register the types of any light client modules it wishes to integrate. 
+
+#### Tendermint registration
+
+To register the tendermint client, modify the `app.go` file to include the tendermint `AppModuleBasic`:
+
+```diff
+import (
+        ...
++       ibctm "github.com/cosmos/ibc-go/v6/modules/light-clients/07-tendermint"
+        ...
+)
+...
+
+ModuleBasics = module.NewBasicManager(
+                ...
+                ibc.AppModuleBasic{},
++               ibctm.AppModuleBasic{},
+                ...
+)
+```
 
 ## IBC Apps
 

modules/core/types/codec.go

@@ -8,7 +8,6 @@ import (
 	channeltypes "github.com/cosmos/ibc-go/v6/modules/core/04-channel/types"
 	commitmenttypes "github.com/cosmos/ibc-go/v6/modules/core/23-commitment/types"
 	solomachine "github.com/cosmos/ibc-go/v6/modules/light-clients/06-solomachine"
-	ibctm "github.com/cosmos/ibc-go/v6/modules/light-clients/07-tendermint"
 )
 
 // RegisterInterfaces registers x/ibc interfaces into protobuf Any.
@@ -17,6 +16,5 @@ func RegisterInterfaces(registry codectypes.InterfaceRegistry) {
 	connectiontypes.RegisterInterfaces(registry)
 	channeltypes.RegisterInterfaces(registry)
 	solomachine.RegisterInterfaces(registry)
-	ibctm.RegisterInterfaces(registry)
 	commitmenttypes.RegisterInterfaces(registry)
 }

modules/light-clients/07-tendermint/module.go

@@ -1,6 +1,53 @@
 package tendermint
 
-// Name returns the IBC client name
-func Name() string {
+import (
+	"encoding/json"
+
+	"github.com/cosmos/cosmos-sdk/client"
+	"github.com/cosmos/cosmos-sdk/codec"
+	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
+	"github.com/cosmos/cosmos-sdk/types/module"
+	"github.com/grpc-ecosystem/grpc-gateway/runtime"
+	"github.com/spf13/cobra"
+)
+
+var _ module.AppModuleBasic = AppModuleBasic{}
+
+// AppModuleBasic defines the basic application module used by the tendermint light client.
+type AppModuleBasic struct{}
+
+// Name returns the tendermint module name.
+func (AppModuleBasic) Name() string {
 	return SubModuleName
 }
+
+// RegisterLegacyAminoCodec does nothing. The Tendermint client does not support amino.
+func (AppModuleBasic) RegisterLegacyAminoCodec(*codec.LegacyAmino) {}
+
+// RegisterInterfaces registers module concrete types into protobuf Any.
+func (AppModuleBasic) RegisterInterfaces(registry codectypes.InterfaceRegistry) {
+	RegisterInterfaces(registry)
+}
+
+// DefaultGenesis returns nil
+func (AppModuleBasic) DefaultGenesis(cdc codec.JSONCodec) json.RawMessage {
+	return nil
+}
+
+// ValidateGenesis return nil
+func (AppModuleBasic) ValidateGenesis(cdc codec.JSONCodec, config client.TxEncodingConfig, bz json.RawMessage) error {
+	return nil
+}
+
+// RegisterGRPCGatewayRoutes performs a no-op.
+func (AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, mux *runtime.ServeMux) {}
+
+// GetTxCmd returns nil.
+func (AppModuleBasic) GetTxCmd() *cobra.Command {
+	return nil
+}
+
+// GetQueryCmd returns nil.
+func (AppModuleBasic) GetQueryCmd() *cobra.Command {
+	return nil
+}

testing/simapp/app.go

@@ -109,6 +109,7 @@ import (
 	porttypes "github.com/cosmos/ibc-go/v6/modules/core/05-port/types"
 	ibchost "github.com/cosmos/ibc-go/v6/modules/core/24-host"
 	ibckeeper "github.com/cosmos/ibc-go/v6/modules/core/keeper"
+	ibctm "github.com/cosmos/ibc-go/v6/modules/light-clients/07-tendermint"
 	ibcmock "github.com/cosmos/ibc-go/v6/testing/mock"
 	simappparams "github.com/cosmos/ibc-go/v6/testing/simapp/params"
 	simappupgrades "github.com/cosmos/ibc-go/v6/testing/simapp/upgrades"
@@ -153,6 +154,7 @@ var (
 		crisis.AppModuleBasic{},
 		slashing.AppModuleBasic{},
 		ibc.AppModuleBasic{},
+		ibctm.AppModuleBasic{},
 		feegrantmodule.AppModuleBasic{},
 		upgrade.AppModuleBasic{},
 		evidence.AppModuleBasic{},