neoneo-go/pkg/core/transaction/transaction.go
Anthony De Meulemeester 1a1a19da7d
Smartcontract (#39)
* deleted transfer_output added asset type and transaction result to core

* removed writing 0x00 when buffer length is 0

* Refactored emit into VM package + moved tx to own package.

* implemented transaction along with claimTransaction.

* refactored naming of transaction + added decode address for uint160 types

* removed unnecessary folder and files.

* transaction/smartcontract logic

* bumped version 0.24.0
2018-03-04 14:56:49 +01:00

178 lines
3.9 KiB
Go

package transaction
import (
"encoding/binary"
"io"
"github.com/CityOfZion/neo-go/pkg/util"
)
// Transaction is a process recorded in the NEO blockchain.
type Transaction struct {
// The type of the transaction.
Type TransactionType
// The trading version which is currently 0.
Version uint8
// Data specific to the type of the transaction.
// This is always a pointer to a <Type>Transaction.
Data interface{}
// Transaction attributes.
Attributes []*Attribute
// The inputs of the transaction.
Inputs []*Input
// The outputs of the transaction.
Outputs []*Output
// The scripts that comes with this transaction.
// Scripts exist out of the verification script
// and invocation script.
Scripts []*Witness
}
// AddOutput adds the given output to the transaction outputs.
func (t *Transaction) AddOutput(out *Output) {
t.Outputs = append(t.Outputs, out)
}
// AddInput adds the given input to the transaction inputs.
func (t *Transaction) AddInput(in *Input) {
t.Inputs = append(t.Inputs, in)
}
// DecodeBinary implements the payload interface.
func (t *Transaction) DecodeBinary(r io.Reader) error {
if err := binary.Read(r, binary.LittleEndian, &t.Type); err != nil {
return err
}
if err := binary.Read(r, binary.LittleEndian, &t.Version); err != nil {
return err
}
if err := t.decodeData(r); err != nil {
return err
}
lenAttrs := util.ReadVarUint(r)
t.Attributes = make([]*Attribute, lenAttrs)
for i := 0; i < int(lenAttrs); i++ {
t.Attributes[i] = &Attribute{}
if err := t.Attributes[i].DecodeBinary(r); err != nil {
return err
}
}
lenInputs := util.ReadVarUint(r)
t.Inputs = make([]*Input, lenInputs)
for i := 0; i < int(lenInputs); i++ {
t.Inputs[i] = &Input{}
if err := t.Inputs[i].DecodeBinary(r); err != nil {
return err
}
}
lenOutputs := util.ReadVarUint(r)
t.Outputs = make([]*Output, lenOutputs)
for i := 0; i < int(lenOutputs); i++ {
t.Outputs[i] = &Output{}
if err := t.Outputs[i].DecodeBinary(r); err != nil {
return err
}
}
lenScripts := util.ReadVarUint(r)
t.Scripts = make([]*Witness, lenScripts)
for i := 0; i < int(lenScripts); i++ {
t.Scripts[i] = &Witness{}
if err := t.Scripts[i].DecodeBinary(r); err != nil {
return err
}
}
return nil
}
func (t *Transaction) decodeData(r io.Reader) error {
switch t.Type {
case InvocationType:
t.Data = &InvocationTX{}
return t.Data.(*InvocationTX).DecodeBinary(r)
case MinerType:
t.Data = &MinerTX{}
return t.Data.(*MinerTX).DecodeBinary(r)
case ClaimType:
t.Data = &ClaimTX{}
return t.Data.(*ClaimTX).DecodeBinary(r)
}
return nil
}
// EncodeBinary implements the payload interface.
func (t *Transaction) EncodeBinary(w io.Writer) error {
if err := binary.Write(w, binary.LittleEndian, t.Type); err != nil {
return err
}
if err := binary.Write(w, binary.LittleEndian, t.Version); err != nil {
return err
}
if err := t.encodeData(w); err != nil {
return err
}
// Attributes
if err := util.WriteVarUint(w, uint64(len(t.Attributes))); err != nil {
return err
}
for _, attr := range t.Attributes {
if err := attr.EncodeBinary(w); err != nil {
return err
}
}
// Inputs
if err := util.WriteVarUint(w, uint64(len(t.Inputs))); err != nil {
return err
}
for _, in := range t.Inputs {
if err := in.EncodeBinary(w); err != nil {
return err
}
}
// Outputs
if err := util.WriteVarUint(w, uint64(len(t.Outputs))); err != nil {
return err
}
for _, out := range t.Outputs {
if err := out.EncodeBinary(w); err != nil {
return err
}
}
// Scripts
if err := util.WriteVarUint(w, uint64(len(t.Scripts))); err != nil {
return err
}
for _, s := range t.Scripts {
if err := s.EncodeBinary(w); err != nil {
return err
}
}
return nil
}
func (t *Transaction) encodeData(w io.Writer) error {
switch t.Type {
case InvocationType:
return t.Data.(*InvocationTX).EncodeBinary(w)
case MinerType:
return t.Data.(*MinerTX).EncodeBinary(w)
case ClaimType:
return t.Data.(*ClaimTX).EncodeBinary(w)
}
return nil
}