7 "github.com/bytom/vapor/encoding/blockchain"
8 "github.com/bytom/vapor/errors"
9 "github.com/bytom/vapor/protocol/bc"
12 // OutputCommitment contains the commitment data for a transaction output.
13 type OutputCommitment struct {
19 func (oc *OutputCommitment) writeExtensibleString(w io.Writer, suffix []byte, assetVersion uint64) error {
20 _, err := blockchain.WriteExtensibleString(w, suffix, func(w io.Writer) error {
21 return oc.writeContents(w, suffix, assetVersion)
26 func (oc *OutputCommitment) writeContents(w io.Writer, suffix []byte, assetVersion uint64) (err error) {
27 if assetVersion == 1 {
28 if _, err = oc.AssetAmount.WriteTo(w); err != nil {
29 return errors.Wrap(err, "writing asset amount")
31 if _, err = blockchain.WriteVarint63(w, oc.VMVersion); err != nil {
32 return errors.Wrap(err, "writing vm version")
34 if _, err = blockchain.WriteVarstr31(w, oc.ControlProgram); err != nil {
35 return errors.Wrap(err, "writing control program")
39 _, err = w.Write(suffix)
41 return errors.Wrap(err, "writing suffix")
44 func (oc *OutputCommitment) readFrom(r *blockchain.Reader, assetVersion uint64) (suffix []byte, err error) {
45 return blockchain.ReadExtensibleString(r, func(r *blockchain.Reader) error {
46 if assetVersion == 1 {
47 if err := oc.AssetAmount.ReadFrom(r); err != nil {
48 return errors.Wrap(err, "reading asset+amount")
50 oc.VMVersion, err = blockchain.ReadVarint63(r)
52 return errors.Wrap(err, "reading VM version")
54 if oc.VMVersion != 1 {
55 return fmt.Errorf("unrecognized VM version %d for asset version 1", oc.VMVersion)
57 oc.ControlProgram, err = blockchain.ReadVarstr31(r)
58 return errors.Wrap(err, "reading control program")