feat(x/tx): extract signers using cosmos.msg.v1.signer (#15205)

Co-authored-by: Amaury <[email protected]>

x/tx/Makefile

@@ -0,0 +1,2 @@
+codegen:
+	@(cd internal/testpb; buf generate)

x/tx/textual/internal/testpb/1.proto → x/tx/internal/testpb/1.proto

@@ -7,7 +7,7 @@ import "google/protobuf/descriptor.proto";
 import "google/protobuf/duration.proto";
 import "google/protobuf/timestamp.proto";
 
-option go_package = "cosmossdk.io/x/tx/textual/internal/testpb";
+option go_package = "cosmossdk.io/x/tx/internal/testpb";
 
 // A is used for testing value renderers.
 message A {

x/tx/internal/testpb/signers.proto

@@ -0,0 +1,63 @@
+syntax = "proto3";
+
+import "cosmos/msg/v1/msg.proto";
+
+option go_package = "cosmossdk.io/x/tx/internal/testpb";
+
+message SimpleSigner {
+  option (cosmos.msg.v1.signer) = "signer";
+  string signer = 1;
+}
+
+message RepeatedSigner {
+  option (cosmos.msg.v1.signer) = "signer";
+  repeated string signer = 1;
+}
+
+message NestedSigner {
+  option (cosmos.msg.v1.signer) = "inner";
+  Inner inner = 1;
+
+  message Inner {
+    option (cosmos.msg.v1.signer) = "signer";
+    string signer = 1;
+  }
+}
+
+message RepeatedNestedSigner {
+  option (cosmos.msg.v1.signer) = "inner";
+  repeated Inner inner = 1;
+
+  message Inner {
+    option (cosmos.msg.v1.signer) = "signer";
+    string signer = 1;
+  }
+}
+
+message NestedRepeatedSigner {
+  option (cosmos.msg.v1.signer) = "inner";
+  Inner inner = 1;
+
+  message Inner {
+    option (cosmos.msg.v1.signer) = "signer";
+    repeated string signer = 1;
+  }
+}
+
+message RepeatedNestedRepeatedSigner {
+  option (cosmos.msg.v1.signer) = "inner";
+  repeated Inner inner = 1;
+
+  message Inner {
+    option (cosmos.msg.v1.signer) = "signer";
+    repeated string signer = 1;
+  }
+}
+
+message BadSigner {
+  option (cosmos.msg.v1.signer) = "signer";
+  bytes signer = 1;
+}
+message NoSignerOption {
+  bytes signer = 1;
+}