fix: gov module queries and ADR

Author: Lockwarr

app/encoding.go

@@ -11,6 +11,8 @@ import (
 	"github.com/cosmos/cosmos-sdk/types/module"
 	"github.com/cosmos/cosmos-sdk/x/auth/tx"
 	"github.com/cosmos/gogoproto/proto"
+
+	"github.com/Nolus-Protocol/nolus-core/app/legacycodec"
 )
 
 // EncodingConfig specifies the concrete encoding types to use for a given app.
@@ -40,6 +42,17 @@ func makeEncodingConfig() EncodingConfig {
 		panic(err)
 	}
 
+	interfaceRegistry.RegisterImplementations(
+		(*sdk.Msg)(nil),
+		&legacycodec.MsgChannelUpgradeInit{},
+		&legacycodec.MsgChannelUpgradeTry{},
+		&legacycodec.MsgChannelUpgradeAck{},
+		&legacycodec.MsgChannelUpgradeConfirm{},
+		&legacycodec.MsgChannelUpgradeOpen{},
+		&legacycodec.MsgChannelUpgradeTimeout{},
+		&legacycodec.MsgChannelUpgradeCancel{},
+	)
+
 	if err := interfaceRegistry.SigningContext().Validate(); err != nil {
 		panic(err)
 	}

app/legacycodec/Readme.md

@@ -0,0 +1,3 @@
+In this folder are hosted older proto generated files from ibc-go v8. We need those since we have published governance proposals in the past that used message types
+from this very proto files. Those message types are not available in ibc-go v10 and our cosmos-sdk/x/gov module is not happy when you ask it to query past proposals.
+We will host those cropped down proto files and customly register the message types that we require just for querying proposals. Once there is a more reliable solution directly implemented in the cosmos-sdk/x/gov module (to support querying proposals of past message types that are no longer available), we can use that and delete those legacy codec files