a67728628e
* Created test_data folder with block json files for testing + create separate file for block base. * Fixed bug in WriteVarUint + Trim logic + unit tests * Refactored store and add more tests for it. * restore headerList from chain file * Fix tx decode bug + lots of housekeeping. * Implemented Node restore state from chain file. * Created standalone package for storage. Added couple more methods to Batch and Store interfaces. * Block persisting + tests * bumped version -> 0.31.0
79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
package transaction
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import (
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"encoding/binary"
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"fmt"
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"io"
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"github.com/CityOfZion/neo-go/pkg/util"
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)
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// Attribute represents a Transaction attribute.
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type Attribute struct {
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Usage AttrUsage
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Data []byte
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}
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// DecodeBinary implements the Payload interface.
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func (attr *Attribute) DecodeBinary(r io.Reader) error {
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if err := binary.Read(r, binary.LittleEndian, &attr.Usage); err != nil {
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return err
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}
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if attr.Usage == ContractHash ||
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attr.Usage == Vote ||
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(attr.Usage >= Hash1 && attr.Usage <= Hash15) {
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attr.Data = make([]byte, 32)
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return binary.Read(r, binary.LittleEndian, attr.Data)
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}
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if attr.Usage == ECDH02 || attr.Usage == ECDH03 {
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attr.Data = make([]byte, 33)
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attr.Data[0] = byte(attr.Usage)
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return binary.Read(r, binary.LittleEndian, attr.Data[1:])
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}
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if attr.Usage == Script {
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attr.Data = make([]byte, 20)
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return binary.Read(r, binary.LittleEndian, attr.Data)
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}
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if attr.Usage == DescriptionURL {
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attr.Data = make([]byte, 1)
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return binary.Read(r, binary.LittleEndian, attr.Data)
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}
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if attr.Usage == Description || attr.Usage >= Remark {
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lenData := util.ReadVarUint(r)
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attr.Data = make([]byte, lenData)
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return binary.Read(r, binary.LittleEndian, attr.Data)
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}
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return fmt.Errorf("failed decoding TX attribute usage: 0x%2x", attr.Usage)
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}
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// EncodeBinary implements the Payload interface.
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func (attr *Attribute) EncodeBinary(w io.Writer) error {
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if err := binary.Write(w, binary.LittleEndian, &attr.Usage); err != nil {
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return err
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}
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if attr.Usage == ContractHash ||
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attr.Usage == Vote ||
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(attr.Usage >= Hash1 && attr.Usage <= Hash15) {
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return binary.Write(w, binary.LittleEndian, attr.Data)
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}
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if attr.Usage == ECDH02 || attr.Usage == ECDH03 {
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attr.Data[0] = byte(attr.Usage)
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return binary.Write(w, binary.LittleEndian, attr.Data[1:33])
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}
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if attr.Usage == Script {
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return binary.Write(w, binary.LittleEndian, attr.Data)
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}
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if attr.Usage == DescriptionURL {
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if err := util.WriteVarUint(w, uint64(len(attr.Data))); err != nil {
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return err
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}
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return binary.Write(w, binary.LittleEndian, attr.Data)
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}
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if attr.Usage == Description || attr.Usage >= Remark {
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if err := util.WriteVarUint(w, uint64(len(attr.Data))); err != nil {
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return err
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}
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return binary.Write(w, binary.LittleEndian, attr.Data)
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}
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return fmt.Errorf("failed encoding TX attribute usage: 0x%2x", attr.Usage)
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}
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