92 lines
1.8 KiB
Go
92 lines
1.8 KiB
Go
package main
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import (
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"bytes"
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"encoding/binary"
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"encoding/hex"
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"fmt"
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"io/ioutil"
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"log"
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"strings"
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"github.com/btcsuite/btcd/txscript"
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"github.com/btcsuite/btcd/wire"
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"github.com/lightningnetwork/lnd/uspv"
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)
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const (
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inspk0 = "2103c9f4836b9a4f77fc0d81f7bcb01b7f1b35916864b9476c241ce9fc198bd25432ac"
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inamt0 = uint64(625000000)
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inspk1 = "00141d0f172a0ecb48aee1be1f2687d2963ae33f71a1"
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inamt1 = uint64(600000000)
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)
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func outpointBytesLil(op wire.OutPoint) []byte {
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var buf bytes.Buffer
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// ignore errors because.. whatever
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_ = binary.Write(&buf, binary.LittleEndian, op.Index)
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b := op.Hash[:]
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return append(b, buf.Bytes()...)
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}
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func calcSignatureHash(
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hashType txscript.SigHashType, tx *wire.MsgTx, idx int) []byte {
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return nil
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}
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// if sighash_ALL, hash of all txin outpoints, sequentially.
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// if other sighash type, 0x00 * 32
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func calcHashPrevOuts(tx *wire.MsgTx) [32]byte {
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for _, in := range tx.TxIn {
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// in.PreviousOutPoint.Hash
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}
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return wire.DoubleSha256SH(tx.TxIn[0].SignatureScript)
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}
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func main() {
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fmt.Printf("sighash 143\n")
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// get previous pkscripts for inputs 0 and 1 from hex
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in0spk, err := hex.DecodeString(string(inspk0))
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if err != nil {
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log.Fatal(err)
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}
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in1spk, err := hex.DecodeString(string(inspk1))
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if err != nil {
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log.Fatal(err)
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}
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// load tx skeleton from local file
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fmt.Printf("loading tx from file tx.hex\n")
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txhex, err := ioutil.ReadFile("tx.hex")
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if err != nil {
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log.Fatal(err)
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}
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txhex = []byte(strings.TrimSpace(string(txhex)))
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txbytes, err := hex.DecodeString(string(txhex))
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if err != nil {
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log.Fatal(err)
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}
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fmt.Printf("loaded %d byte tx %x\n", len(txbytes), txbytes)
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// make tx
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ttx := wire.NewMsgTx()
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// deserialize into tx
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buf := bytes.NewBuffer(txbytes)
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ttx.Deserialize(buf)
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ttx.TxIn[0].SignatureScript = in0spk
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ttx.TxIn[1].SignatureScript = in1spk
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fmt.Printf(uspv.TxToString(ttx))
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}
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