build_vip191_tx.go

package demo

import (
	"bytes"

	"github.com/ethereum/go-ethereum/crypto"
	"github.com/vechain/thor/thor"
	"github.com/vechain/thor/tx"
)

func BuildVIP191Tx() *tx.Transaction {
	originPrivateKey, _ := crypto.HexToECDSA("c962bfd916c0f8d4c1866b11a24802815cf58ba981354fad0ac734d0217cfe73")
	delegatorPrivateKey, _ := crypto.HexToECDSA("dce1443bd2ef0c2631adc1c67e5c93f13dc23a41c18b536effbbdcbcdb96fb65")
	origin := thor.Address(crypto.PubkeyToAddress(originPrivateKey.PublicKey))

	blockID, _ := thor.ParseBytes32("0x002b99c540c4e2674551edba709748e2f668b9b5ac18eba2f72a3af72d9a6734")
	to, _ := thor.ParseAddress("0xd3ae78222beadb038203be21ed5ce7c9b1bff602")

	unsigned := new(tx.Builder).
		ChainTag(0x27).
		BlockRef(tx.NewBlockRefFromID(blockID)).
		Expiration(30 * 8640).
		Clause(tx.NewClause(&to)).
		Gas(21000).
		Nonce(0xa2b5232b).              // random number
		Features(tx.DelegationFeature). // enable fee delegation
		Build()

	originSig, _ := crypto.Sign(unsigned.SigningHash().Bytes(), originPrivateKey)
	delegatorSig, _ := crypto.Sign(unsigned.DelegatorSigningHash(origin).Bytes(), delegatorPrivateKey)

	fullSig := bytes.Join([][]byte{originSig, delegatorSig}, nil)

	signed := unsigned.WithSignature(fullSig)
	return signed
}

Working Prefect @testnet ^^'