Use service Msgs in CLI tx commands (#8512)

* Use service Msgs in CLI tx commands

* Update comment

* Gracefully support amino signing

* CLI to use svc msg

* Fix lint

* Use fq method name in events

* Update tests

* Fix quering events

* Add docs

* Fix test build

* Fix events

* Fix search for events

* Handle old andd new event quering

* Use merge events

* Better encCfg

* Add page in search

* Fix tests

* Update test and comments

* Update x/auth/legacy/legacytx/stdsign.go

Co-authored-by: atheeshp <59333759+atheeshp@users.noreply.github.com>

* Fix conflict for weighted vote

* Make CopyTx actually run

* Fix CopyTx

* Fix test

* Add changelog entry

* Remove useless code

* Add msgs tests

* Remove testing proto Msg via CLI

* Fix lint

* Fix test

* Implement GetSignBytes on ServiceMsg

* Fix %T

Co-authored-by: atheeshp <59333759+atheeshp@users.noreply.github.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

types/service_msg.go

@@ -1,6 +1,8 @@
 package types
 
 import (
+	"fmt"
+
 	"github.com/gogo/protobuf/proto"
 )
 
@@ -18,7 +20,7 @@ type MsgRequest interface {
 }
 
 // ServiceMsg is the struct into which an Any whose typeUrl matches a service
-// method format (ex. `/cosmos.gov.Msg/SubmitProposal`) unpacks.
+// method format (ex. `/cosmos.gov.v1beta1.Msg/SubmitProposal`) unpacks.
 type ServiceMsg struct {
 	// MethodName is the fully-qualified service method name.
 	MethodName string
@@ -44,7 +46,17 @@ func (msg ServiceMsg) ValidateBasic() error {
 
 // GetSignBytes implements Msg.GetSignBytes method.
 func (msg ServiceMsg) GetSignBytes() []byte {
-	panic("ServiceMsg does not have a GetSignBytes method")
+	// Here, we're gracefully supporting Amino JSON for service
+	// Msgs.
+	// ref: https://github.com/cosmos/cosmos-sdk/issues/8346
+	// If `msg` is a service Msg, then we cast its `Request` to a sdk.Msg
+	// and call GetSignBytes on the `Request`.
+	msgRequest, ok := msg.Request.(Msg)
+	if !ok {
+		panic(fmt.Errorf("cannot convert ServiceMsg request to sdk.Msg, got %T", msgRequest))
+	}
+
+	return msgRequest.GetSignBytes()
 }
 
 // GetSigners implements Msg.GetSigners method.