neoneo-go/pkg/core/transaction/invocation.go

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package transaction
import (
"io"
"github.com/CityOfZion/neo-go/pkg/util"
)
// InvocationTX represents a invocation transaction and is used to
// deploy smart contract to the NEO blockchain.
type InvocationTX struct {
// Script output of the smart contract.
Script []byte
// Gas cost of the smart contract.
Gas util.Fixed8
Version uint8
}
// NewInvocationTX returns a new invocation transaction.
func NewInvocationTX(script []byte) *Transaction {
return &Transaction{
Type: InvocationType,
Version: 1,
Data: &InvocationTX{
Script: script,
},
Attributes: []*Attribute{},
Inputs: []*Input{},
Outputs: []*Output{},
Scripts: []*Witness{},
}
}
// DecodeBinary implements the Payload interface.
func (tx *InvocationTX) DecodeBinary(r io.Reader) error {
br := util.BinReader{R: r}
tx.Script = br.ReadBytes()
if tx.Version >= 1 {
br.ReadLE(&tx.Gas)
} else {
tx.Gas = util.Fixed8FromInt64(0)
}
return br.Err
}
// EncodeBinary implements the Payload interface.
func (tx *InvocationTX) EncodeBinary(w io.Writer) error {
bw := util.BinWriter{W: w}
bw.WriteBytes(tx.Script)
if tx.Version >= 1 {
bw.WriteLE(tx.Gas)
}
return bw.Err
}
// Size returns serialized binary size for this transaction.
func (tx *InvocationTX) Size() int {
sz := util.GetVarSize(tx.Script)
if tx.Version >= 1 {
sz += tx.Gas.Size()
}
return sz
}