feat: Add Any helper functions (#92)

README.md

@@ -8,7 +8,7 @@ go install github.com/cosmos/cosmos-proto/cmd/protoc-gen-go-pulsar
 
 cd path/to/proto/files
 
-protoc --go-pulsar_out=. --go-pulsar_opt=paths=source_relative --go-pulsar_opt=features=marshal+unmarshal+size -I .
+protoc --go-pulsar_out=. --go-pulsar_opt=paths=source_relative --go-pulsar_opt=features=protoc+fast -I .
 NAME_OF_FILE.proto
 
 ## Acknowledgements

any/any.go

@@ -0,0 +1,63 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package any
+
+import (
+	"google.golang.org/protobuf/proto"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	"google.golang.org/protobuf/types/known/anypb"
+)
+
+// New marshals src into a new Any instance.
+func New(src proto.Message) (*anypb.Any, error) {
+	dst := new(anypb.Any)
+	if err := MarshalFrom(dst, src, proto.MarshalOptions{}); err != nil {
+		return nil, err
+	}
+	return dst, nil
+}
+
+// MarshalFrom marshals src into dst as the underlying message
+// using the provided marshal options.
+//
+// If no options are specified, call dst.MarshalFrom instead.
+func MarshalFrom(dst *anypb.Any, src proto.Message, opts proto.MarshalOptions) error {
+	if src == nil {
+		return protoimpl.X.NewError("invalid nil source message")
+	}
+	b, err := opts.Marshal(src)
+	if err != nil {
+		return err
+	}
+	dst.TypeUrl = string(src.ProtoReflect().Descriptor().FullName())
+	dst.Value = b
+	return nil
+}

any/any_test.go

@@ -0,0 +1,33 @@
+package any_test
+
+import (
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"github.com/stretchr/testify/require"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/testing/protocmp"
+	"google.golang.org/protobuf/types/known/anypb"
+
+	"github.com/cosmos/cosmos-proto/any"
+	"github.com/cosmos/cosmos-proto/testpb"
+)
+
+func TestAny(t *testing.T) {
+	value := &testpb.A{SomeBoolean: true}
+
+	dst1 := &anypb.Any{}
+	err := any.MarshalFrom(dst1, value, proto.MarshalOptions{})
+	require.NoError(t, err)
+	require.Equal(t, "A", dst1.TypeUrl) // Make sure there's no "type.googleapis.com/" prefix.
+
+	dst2, err := any.New(value)
+	require.NoError(t, err)
+	require.Equal(t, "A", dst2.TypeUrl) // Make sure there's no "type.googleapis.com/" prefix.
+
+	// Round trip.
+	newValue, err := anypb.UnmarshalNew(dst2, proto.UnmarshalOptions{})
+	require.NoError(t, err)
+	diff := cmp.Diff(value, newValue, protocmp.Transform())
+	require.Empty(t, diff)
+}

any/doc.go

@@ -0,0 +1,19 @@
+// Package any is a helper library to be used as a replacement for some of the
+// official "google.golang.org/protobuf/types/known/anypb"'s functions which
+// prepend the "type.googleapis.com" prefix in type URLs.
+//
+// In the Cosmos SDK, an Any's TypeURL starts with a `/` character, e.g.
+// "/cosmos.bank.v1beta1.MsgSend". However, if we pack this MsgSend into
+// an anypb.Any using the offical anypb package's helper functions, we get a
+// TypeURL which is "type.googleapis.com/cosmos.bank.v1beta1.MsgSend".
+//
+// Therefore, the following 3 functions/methods cannot be used within the
+// Cosmos context:
+// - anypb.New
+// - anypb.MarshalFrom
+// - anypb.Any#MarshalFrom
+// as all of them append the unwanted prefix.
+//
+// This package exposes the `New` and `MarshalFrom` helper functions, which do
+// not prepend any prefix to type URLs.
+package any