145 lines
3.2 KiB
Go
145 lines
3.2 KiB
Go
package codec
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"strings"
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"github.com/cosmos/cosmos-sdk/codec/types"
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"github.com/gogo/protobuf/jsonpb"
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)
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// ProtoCodec defines a codec that utilizes Protobuf for both binary and JSON
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// encoding.
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type ProtoCodec struct {
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anyUnpacker types.AnyUnpacker
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}
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func NewProtoCodec(anyUnpacker types.AnyUnpacker) Marshaler {
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return &ProtoCodec{anyUnpacker: anyUnpacker}
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}
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func (pc *ProtoCodec) MarshalBinaryBare(o ProtoMarshaler) ([]byte, error) {
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return o.Marshal()
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}
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func (pc *ProtoCodec) MustMarshalBinaryBare(o ProtoMarshaler) []byte {
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bz, err := pc.MarshalBinaryBare(o)
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if err != nil {
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panic(err)
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}
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return bz
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}
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func (pc *ProtoCodec) MarshalBinaryLengthPrefixed(o ProtoMarshaler) ([]byte, error) {
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bz, err := pc.MarshalBinaryBare(o)
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if err != nil {
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return nil, err
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}
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buf := new(bytes.Buffer)
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if err := encodeUvarint(buf, uint64(o.Size())); err != nil {
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return nil, err
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}
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if _, err := buf.Write(bz); err != nil {
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return nil, err
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}
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return buf.Bytes(), nil
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}
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func (pc *ProtoCodec) MustMarshalBinaryLengthPrefixed(o ProtoMarshaler) []byte {
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bz, err := pc.MarshalBinaryLengthPrefixed(o)
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if err != nil {
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panic(err)
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}
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return bz
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}
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func (pc *ProtoCodec) UnmarshalBinaryBare(bz []byte, ptr ProtoMarshaler) error {
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err := ptr.Unmarshal(bz)
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if err != nil {
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return err
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}
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err = types.UnpackInterfaces(ptr, pc.anyUnpacker)
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if err != nil {
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return err
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}
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return nil
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}
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func (pc *ProtoCodec) MustUnmarshalBinaryBare(bz []byte, ptr ProtoMarshaler) {
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if err := pc.UnmarshalBinaryBare(bz, ptr); err != nil {
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panic(err)
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}
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}
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func (pc *ProtoCodec) UnmarshalBinaryLengthPrefixed(bz []byte, ptr ProtoMarshaler) error {
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size, n := binary.Uvarint(bz)
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if n < 0 {
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return fmt.Errorf("invalid number of bytes read from length-prefixed encoding: %d", n)
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}
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if size > uint64(len(bz)-n) {
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return fmt.Errorf("not enough bytes to read; want: %v, got: %v", size, len(bz)-n)
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} else if size < uint64(len(bz)-n) {
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return fmt.Errorf("too many bytes to read; want: %v, got: %v", size, len(bz)-n)
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}
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bz = bz[n:]
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return pc.UnmarshalBinaryBare(bz, ptr)
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}
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func (pc *ProtoCodec) MustUnmarshalBinaryLengthPrefixed(bz []byte, ptr ProtoMarshaler) {
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if err := pc.UnmarshalBinaryLengthPrefixed(bz, ptr); err != nil {
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panic(err)
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}
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}
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func (pc *ProtoCodec) MarshalJSON(o interface{}) ([]byte, error) {
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m, ok := o.(ProtoMarshaler)
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if !ok {
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return nil, fmt.Errorf("cannot protobuf JSON encode unsupported type: %T", o)
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}
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return ProtoMarshalJSON(m)
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}
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func (pc *ProtoCodec) MustMarshalJSON(o interface{}) []byte {
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bz, err := pc.MarshalJSON(o)
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if err != nil {
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panic(err)
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}
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return bz
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}
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func (pc *ProtoCodec) UnmarshalJSON(bz []byte, ptr interface{}) error {
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m, ok := ptr.(ProtoMarshaler)
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if !ok {
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return fmt.Errorf("cannot protobuf JSON decode unsupported type: %T", ptr)
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}
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err := jsonpb.Unmarshal(strings.NewReader(string(bz)), m)
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if err != nil {
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return err
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}
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return types.UnpackInterfaces(ptr, pc.anyUnpacker)
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}
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func (pc *ProtoCodec) MustUnmarshalJSON(bz []byte, ptr interface{}) {
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if err := pc.UnmarshalJSON(bz, ptr); err != nil {
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panic(err)
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}
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}
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func (pc *ProtoCodec) UnpackAny(any *types.Any, iface interface{}) error {
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return pc.anyUnpacker.UnpackAny(any, iface)
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}
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