kaspad/domain/consensus/timelock_CLTV_test.go
2022-11-16 23:48:05 +02:00

538 lines
23 KiB
Go

package consensus_test
import (
"errors"
"testing"
"github.com/kaspanet/kaspad/domain/consensus"
"github.com/kaspanet/kaspad/domain/consensus/model"
"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"
"github.com/kaspanet/kaspad/domain/consensus/ruleerrors"
"github.com/kaspanet/kaspad/domain/consensus/utils/consensushashing"
"github.com/kaspanet/kaspad/domain/consensus/utils/constants"
"github.com/kaspanet/kaspad/domain/consensus/utils/testutils"
"github.com/kaspanet/kaspad/domain/consensus/utils/transactionhelper"
"github.com/kaspanet/kaspad/domain/consensus/utils/txscript"
)
// TestCheckLockTimeVerifyConditionedByDAAScore verifies that an output locked by the CLTV script is spendable only after
// the DAA score reached the set target.
func TestCheckLockTimeVerifyConditionedByDAAScore(t *testing.T) {
testutils.ForAllNets(t, true, func(t *testing.T, consensusConfig *consensus.Config) {
consensusConfig.BlockCoinbaseMaturity = 0
factory := consensus.NewFactory()
testConsensus, teardown, err := factory.NewTestConsensus(consensusConfig, "TestCheckLockTimeVerifyConditionedByDAAScore")
if err != nil {
t.Fatalf("Error setting up consensus: %+v", err)
}
defer teardown(false)
blockAHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{testConsensus.DAGParams().GenesisHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockA: %v", err)
}
blockBHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockAHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockB: %v", err)
}
blockCHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockBHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockC: %v", err)
}
blockDHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockCHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockD: %v", err)
}
blockD, _, err := testConsensus.GetBlock(blockDHash)
if err != nil {
t.Fatalf("Failed getting blockD: %v", err)
}
fees := uint64(1)
//Create a CLTV script:
targetDAAScore := consensusConfig.GenesisBlock.Header.DAAScore() + uint64(30)
redeemScriptCLTV, err := createScriptCLTV(targetDAAScore)
if err != nil {
t.Fatalf("Failed to create a script using createScriptCLTV: %v", err)
}
p2shScriptCLTV, err := txscript.PayToScriptHashScript(redeemScriptCLTV)
if err != nil {
t.Fatalf("Failed to create a pay-to-script-hash script : %v", err)
}
scriptPublicKeyCLTV := externalapi.ScriptPublicKey{
Version: constants.MaxScriptPublicKeyVersion,
Script: p2shScriptCLTV,
}
transactionWithLockedOutput, err := createTransactionWithLockedOutput(blockD.Transactions[transactionhelper.CoinbaseTransactionIndex],
fees, &scriptPublicKeyCLTV)
if err != nil {
t.Fatalf("Error in createTransactionWithLockedOutput: %v", err)
}
// BlockE contains the locked output (locked by CLTV).
// This block should be valid since CLTV script locked only the output.
blockEHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockDHash}, nil,
[]*externalapi.DomainTransaction{transactionWithLockedOutput})
if err != nil {
t.Fatalf("Error creating blockE: %v", err)
}
// Create a transaction that tries to spend the locked output.
transactionThatSpentTheLockedOutput, err := createTransactionThatSpentTheLockedOutput(transactionWithLockedOutput,
fees, redeemScriptCLTV, targetDAAScore)
if err != nil {
t.Fatalf("Error creating transactionThatSpentTheLockedOutput: %v", err)
}
// Add a block that contains a transaction that spends the locked output before the time, and therefore should be failed.
// (The DAA score should be x, before the output will be spendable, where x = 'targetDAAScore' ).
_, _, err = testConsensus.AddBlock([]*externalapi.DomainHash{blockEHash}, nil,
[]*externalapi.DomainTransaction{transactionThatSpentTheLockedOutput})
if err == nil || !errors.Is(err, ruleerrors.ErrUnfinalizedTx) {
t.Fatalf("Expected block to be invalid with err: %v, instead found: %v", ruleerrors.ErrUnfinalizedTx, err)
}
// Add blocks to release the locked output, the DAA score should be 'numOfBlocksToWait'.
tipHash := blockEHash
stagingArea := model.NewStagingArea()
currentDAAScore, err := testConsensus.DAABlocksStore().DAAScore(testConsensus.DatabaseContext(), stagingArea, tipHash)
if err != nil {
t.Fatalf("Failed getting DAA score: %v", err)
}
numOfBlocksToAdd := targetDAAScore - currentDAAScore
for numOfBlocksToAdd > 0 {
tipHash, _, err = testConsensus.AddBlock([]*externalapi.DomainHash{tipHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating tip: %v", err)
}
numOfBlocksToAdd--
}
// Tries to spend the output that should be no longer locked
validBlock, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{tipHash}, nil,
[]*externalapi.DomainTransaction{transactionThatSpentTheLockedOutput})
if err != nil {
t.Fatalf("The block should be valid since the output is not locked anymore. but got an error: %v", err)
}
validBlockStatus, err := testConsensus.BlockStatusStore().Get(testConsensus.DatabaseContext(), stagingArea,
validBlock)
if err != nil {
t.Fatalf("Failed getting the status for validBlock: %v", err)
}
if !validBlockStatus.Equal(externalapi.StatusUTXOValid) {
t.Fatalf("The status of validBlock should be: %v, but got: %v", externalapi.StatusUTXOValid,
validBlockStatus)
}
})
}
// TestCheckLockTimeVerifyConditionedByDAAScoreWithWrongLockTime verifies that in case of wrong lock time(lower than expected)
// the block status will be StatusDisqualifiedFromChain.
func TestCheckLockTimeVerifyConditionedByDAAScoreWithWrongLockTime(t *testing.T) {
testutils.ForAllNets(t, true, func(t *testing.T, consensusConfig *consensus.Config) {
consensusConfig.BlockCoinbaseMaturity = 0
factory := consensus.NewFactory()
testConsensus, teardown, err := factory.NewTestConsensus(consensusConfig,
"TestCheckLockTimeVerifyConditionedByDAAScoreWithWrongLockTime")
if err != nil {
t.Fatalf("Error setting up consensus: %+v", err)
}
defer teardown(false)
blockAHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{testConsensus.DAGParams().GenesisHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockA: %v", err)
}
blockBHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockAHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockB: %v", err)
}
blockCHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockBHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockC: %v", err)
}
blockDHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockCHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockD: %v", err)
}
blockD, _, err := testConsensus.GetBlock(blockDHash)
if err != nil {
t.Fatalf("Failed getting blockD: %v", err)
}
fees := uint64(1)
//Create a CLTV script:
targetDAAScore := consensusConfig.GenesisBlock.Header.DAAScore() + uint64(30)
redeemScriptCLTV, err := createScriptCLTV(targetDAAScore)
if err != nil {
t.Fatalf("Failed to create a script using createScriptCLTV: %v", err)
}
p2shScriptCLTV, err := txscript.PayToScriptHashScript(redeemScriptCLTV)
if err != nil {
t.Fatalf("Failed to create a pay-to-script-hash script : %v", err)
}
scriptPublicKeyCLTV := externalapi.ScriptPublicKey{
Version: constants.MaxScriptPublicKeyVersion,
Script: p2shScriptCLTV,
}
transactionWithLockedOutput, err := createTransactionWithLockedOutput(blockD.Transactions[transactionhelper.CoinbaseTransactionIndex],
fees, &scriptPublicKeyCLTV)
if err != nil {
t.Fatalf("Error in createTransactionWithLockedOutput: %v", err)
}
// BlockE contains the locked output (locked by CLTV).
// This block should be valid since CLTV script locked only the output.
blockEHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockDHash}, nil,
[]*externalapi.DomainTransaction{transactionWithLockedOutput})
if err != nil {
t.Fatalf("Error creating blockE: %v", err)
}
// Create a transaction that tries to spend the locked output.
// Decreased the lock time to get wrong lock time.
transactionWithWrongLockTime, err := createTransactionThatSpentTheLockedOutput(transactionWithLockedOutput,
fees, redeemScriptCLTV, targetDAAScore-1)
if err != nil {
t.Fatalf("Error creating transactionWithWrongLockTime: %v", err)
}
// Add blocks to release the locked output, the DAA score should be 'numOfBlocksToWait'.
tipHash := blockEHash
stagingArea := model.NewStagingArea()
currentDAAScore, err := testConsensus.DAABlocksStore().DAAScore(testConsensus.DatabaseContext(), stagingArea, tipHash)
if err != nil {
t.Fatalf("Failed getting DAA score for tip: %v", err)
}
numOfBlocksToAdd := targetDAAScore - currentDAAScore
for numOfBlocksToAdd > 0 {
tipHash, _, err = testConsensus.AddBlock([]*externalapi.DomainHash{tipHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating tip: %v", err)
}
numOfBlocksToAdd--
}
// Tries to spend the output, the output is not locked anymore but since the lock time is wrong the block status should
// be 'disqualifiedFromChain'.
blockWithWrongLockTime, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{tipHash}, nil,
[]*externalapi.DomainTransaction{transactionWithWrongLockTime})
if err != nil {
t.Fatalf("The block should be valid. but got an error: %v", err)
}
blockWithWrongLockTimeStatus, err := testConsensus.BlockStatusStore().Get(testConsensus.DatabaseContext(), stagingArea,
blockWithWrongLockTime)
if err != nil {
t.Fatalf("Failed getting the status for blockWithWrongLockTime: %v", err)
}
if !blockWithWrongLockTimeStatus.Equal(externalapi.StatusDisqualifiedFromChain) {
t.Fatalf("The status of blockWithWrongLockTime should be: %v, but got: %v", externalapi.StatusDisqualifiedFromChain,
blockWithWrongLockTimeStatus)
}
})
}
// TestCheckLockTimeVerifyConditionedByAbsoluteTime verifies that an output locked by the CLTV script has spendable only after
// the time has reached to the set target (compared to the past median time).
func TestCheckLockTimeVerifyConditionedByAbsoluteTime(t *testing.T) {
testutils.ForAllNets(t, true, func(t *testing.T, consensusConfig *consensus.Config) {
consensusConfig.BlockCoinbaseMaturity = 0
factory := consensus.NewFactory()
testConsensus, teardown, err := factory.NewTestConsensus(consensusConfig, "TestCheckLockTimeVerifyConditionedByAbsoluteTime")
if err != nil {
t.Fatalf("Error setting up consensus: %+v", err)
}
defer teardown(false)
blockAHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{testConsensus.DAGParams().GenesisHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockA: %v", err)
}
blockBHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockAHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockB: %v", err)
}
blockCHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockBHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockC: %v", err)
}
fees := uint64(1)
blockDHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockCHash}, nil,
[]*externalapi.DomainTransaction{})
if err != nil {
t.Fatalf("Error creating blockD: %v", err)
}
blockD, _, err := testConsensus.GetBlock(blockDHash)
if err != nil {
t.Fatalf("Failed getting blockD: %v", err)
}
//Create a CLTV script:
timeToWait := uint64(12 * 1000)
lockTimeTarget := uint64(blockD.Header.TimeInMilliseconds()) + timeToWait
redeemScriptCLTV, err := createScriptCLTV(lockTimeTarget)
if err != nil {
t.Fatalf("Failed to create a script using createScriptCLTV: %v", err)
}
p2shScriptCLTV, err := txscript.PayToScriptHashScript(redeemScriptCLTV)
if err != nil {
t.Fatalf("Failed to create a pay-to-script-hash script : %v", err)
}
scriptPublicKeyCLTV := externalapi.ScriptPublicKey{
Version: constants.MaxScriptPublicKeyVersion,
Script: p2shScriptCLTV,
}
transactionWithLockedOutput, err := createTransactionWithLockedOutput(blockD.Transactions[transactionhelper.CoinbaseTransactionIndex],
fees, &scriptPublicKeyCLTV)
if err != nil {
t.Fatalf("Error in createTransactionWithLockedOutput: %v", err)
}
// BlockE contains the locked output (locked by CLTV).
// This block should be valid since CLTV script locked only the output.
blockEHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockDHash}, nil,
[]*externalapi.DomainTransaction{transactionWithLockedOutput})
if err != nil {
t.Fatalf("Error creating blockE: %v", err)
}
blockE, _, err := testConsensus.GetBlock(blockEHash)
if err != nil {
t.Fatalf("Failed getting blockE: %v", err)
}
// Create a transaction that tries to spend the locked output.
transactionThatSpentTheLockedOutput, err := createTransactionThatSpentTheLockedOutput(transactionWithLockedOutput,
fees, redeemScriptCLTV, lockTimeTarget)
if err != nil {
t.Fatalf("Error creating transactionThatSpentTheLockedOutput: %v", err)
}
// Add a block that contains a transaction that tries to spend the locked output before the time, and therefore should be failed.
_, _, err = testConsensus.AddBlock([]*externalapi.DomainHash{blockEHash}, nil,
[]*externalapi.DomainTransaction{transactionThatSpentTheLockedOutput})
if err == nil || !errors.Is(err, ruleerrors.ErrUnfinalizedTx) {
t.Fatalf("Expected block to be invalid with err: %v, instead found: %v", ruleerrors.ErrUnfinalizedTx, err)
}
emptyCoinbase := externalapi.DomainCoinbaseData{
ScriptPublicKey: &externalapi.ScriptPublicKey{
Script: nil,
Version: 0,
},
}
var tipHash *externalapi.DomainHash
timeStampBlockE := blockE.Header.TimeInMilliseconds()
stagingArea := model.NewStagingArea()
// Make sure the time limitation has passed.
for i := int64(0); ; i++ {
tipBlock, err := testConsensus.BuildBlock(&emptyCoinbase, nil)
if err != nil {
t.Fatalf("Error creating tip using BuildBlock: %+v", err)
}
blockHeader := tipBlock.Header.ToMutable()
blockHeader.SetTimeInMilliseconds(timeStampBlockE + i*1000)
tipBlock.Header = blockHeader.ToImmutable()
err = testConsensus.ValidateAndInsertBlock(tipBlock, true)
if err != nil {
t.Fatalf("Error validating and inserting tip block: %v", err)
}
tipHash = consensushashing.BlockHash(tipBlock)
pastMedianTime, err := testConsensus.PastMedianTimeManager().PastMedianTime(stagingArea, tipHash)
if err != nil {
t.Fatalf("Failed getting pastMedianTime: %v", err)
}
if uint64(pastMedianTime) > lockTimeTarget {
break
}
}
// Tries to spend the output that should be no longer locked
validBlock, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{tipHash}, nil,
[]*externalapi.DomainTransaction{transactionThatSpentTheLockedOutput})
if err != nil {
t.Fatalf("The block should be valid since the output is not locked anymore. but got an error: %v", err)
}
validBlockStatus, err := testConsensus.BlockStatusStore().Get(testConsensus.DatabaseContext(), stagingArea,
validBlock)
if err != nil {
t.Fatalf("Failed getting the status for validBlock: %v", err)
}
if !validBlockStatus.Equal(externalapi.StatusUTXOValid) {
t.Fatalf("The status of validBlock should be: %v, but got: %v", externalapi.StatusUTXOValid,
validBlockStatus)
}
})
}
// TestCheckLockTimeVerifyConditionedByAbsoluteTimeWithWrongLockTime verifies that in case of wrong lock time(lower than expected)
// the block status will be StatusDisqualifiedFromChain
func TestCheckLockTimeVerifyConditionedByAbsoluteTimeWithWrongLockTime(t *testing.T) {
testutils.ForAllNets(t, true, func(t *testing.T, consensusConfig *consensus.Config) {
consensusConfig.BlockCoinbaseMaturity = 0
factory := consensus.NewFactory()
testConsensus, teardown, err := factory.NewTestConsensus(consensusConfig,
"TestCheckLockTimeVerifyConditionedByAbsoluteTimeWithWrongLockTime")
if err != nil {
t.Fatalf("Error setting up consensus: %+v", err)
}
defer teardown(false)
blockAHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{testConsensus.DAGParams().GenesisHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockA: %v", err)
}
blockBHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockAHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockB: %v", err)
}
blockCHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockBHash}, nil, nil)
if err != nil {
t.Fatalf("Error creating blockC: %v", err)
}
fees := uint64(1)
blockDHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockCHash}, nil,
[]*externalapi.DomainTransaction{})
if err != nil {
t.Fatalf("Error creating blockD: %v", err)
}
blockD, _, err := testConsensus.GetBlock(blockDHash)
if err != nil {
t.Fatalf("Failed getting blockD: %v", err)
}
//Create a CLTV script:
timeToWait := uint64(12 * 1000)
lockTimeTarget := uint64(blockD.Header.TimeInMilliseconds()) + timeToWait
redeemScriptCLTV, err := createScriptCLTV(lockTimeTarget)
if err != nil {
t.Fatalf("Failed to create a script using createScriptCLTV: %v", err)
}
p2shScriptCLTV, err := txscript.PayToScriptHashScript(redeemScriptCLTV)
if err != nil {
t.Fatalf("Failed to create a pay-to-script-hash script : %v", err)
}
scriptPublicKeyCLTV := externalapi.ScriptPublicKey{
Version: constants.MaxScriptPublicKeyVersion,
Script: p2shScriptCLTV,
}
transactionWithLockedOutput, err := createTransactionWithLockedOutput(blockD.Transactions[transactionhelper.CoinbaseTransactionIndex],
fees, &scriptPublicKeyCLTV)
if err != nil {
t.Fatalf("Error in createTransactionWithLockedOutput: %v", err)
}
// BlockE contains the locked output (locked by CLTV).
// This block should be valid since CLTV script locked only the output.
blockEHash, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{blockDHash}, nil,
[]*externalapi.DomainTransaction{transactionWithLockedOutput})
if err != nil {
t.Fatalf("Error creating blockE: %v", err)
}
blockE, _, err := testConsensus.GetBlock(blockEHash)
if err != nil {
t.Fatalf("Failed getting blockE: %v", err)
}
// Create a transaction that tries to spend the locked output.
transactionWithWrongLockTime, err := createTransactionThatSpentTheLockedOutput(transactionWithLockedOutput,
fees, redeemScriptCLTV, lockTimeTarget-1)
if err != nil {
t.Fatalf("Error creating transactionWithWrongLockTime: %v", err)
}
emptyCoinbase := externalapi.DomainCoinbaseData{
ScriptPublicKey: &externalapi.ScriptPublicKey{
Script: nil,
Version: 0,
},
}
var tipHash *externalapi.DomainHash
timeStampBlockE := blockE.Header.TimeInMilliseconds()
stagingArea := model.NewStagingArea()
// Make sure the time limitation has passed.
for i := int64(0); ; i++ {
tipBlock, err := testConsensus.BuildBlock(&emptyCoinbase, nil)
if err != nil {
t.Fatalf("Error creating tip using BuildBlock: %v", err)
}
blockHeader := tipBlock.Header.ToMutable()
blockHeader.SetTimeInMilliseconds(timeStampBlockE + i*1000)
tipBlock.Header = blockHeader.ToImmutable()
err = testConsensus.ValidateAndInsertBlock(tipBlock, true)
if err != nil {
t.Fatalf("Error validating and inserting tip block: %v", err)
}
tipHash = consensushashing.BlockHash(tipBlock)
pastMedianTime, err := testConsensus.PastMedianTimeManager().PastMedianTime(stagingArea, tipHash)
if err != nil {
t.Fatalf("Failed getting pastMedianTime: %v", err)
}
if uint64(pastMedianTime) > lockTimeTarget {
break
}
}
// Tries to spend the output, the output is not locked anymore but since the lock time is wrong the block status should
// be 'disqualifiedFromChain'.
blockWithWrongLockTime, _, err := testConsensus.AddBlock([]*externalapi.DomainHash{tipHash}, nil,
[]*externalapi.DomainTransaction{transactionWithWrongLockTime})
if err != nil {
t.Fatalf("The block should be valid. but got an error: %v", err)
}
blockWithWrongLockTimeStatus, err := testConsensus.BlockStatusStore().Get(testConsensus.DatabaseContext(), stagingArea,
blockWithWrongLockTime)
if err != nil {
t.Fatalf("Failed getting the status for blockWithWrongLockTime: %v", err)
}
if !blockWithWrongLockTimeStatus.Equal(externalapi.StatusDisqualifiedFromChain) {
t.Fatalf("The status of blockWithWrongLockTime should be: %v, but got: %v", externalapi.StatusDisqualifiedFromChain,
blockWithWrongLockTimeStatus)
}
})
}
func createScriptCLTV(absoluteTimeOrDAAScoreTarget uint64) ([]byte, error) {
scriptBuilder := txscript.NewScriptBuilder()
scriptBuilder.AddLockTimeNumber(absoluteTimeOrDAAScoreTarget)
scriptBuilder.AddOp(txscript.OpCheckLockTimeVerify)
scriptBuilder.AddOp(txscript.OpTrue)
return scriptBuilder.Script()
}
func createTransactionWithLockedOutput(txToSpend *externalapi.DomainTransaction, fee uint64,
scriptPublicKeyCLTV *externalapi.ScriptPublicKey) (*externalapi.DomainTransaction, error) {
_, redeemScript := testutils.OpTrueScript()
signatureScript, err := txscript.PayToScriptHashSignatureScript(redeemScript, nil)
if err != nil {
return nil, err
}
input := &externalapi.DomainTransactionInput{
PreviousOutpoint: externalapi.DomainOutpoint{
TransactionID: *consensushashing.TransactionID(txToSpend),
Index: 0,
},
SignatureScript: signatureScript,
Sequence: constants.MaxTxInSequenceNum,
}
output := &externalapi.DomainTransactionOutput{
ScriptPublicKey: scriptPublicKeyCLTV,
Value: txToSpend.Outputs[0].Value - fee,
}
return &externalapi.DomainTransaction{
Version: constants.MaxTransactionVersion,
Inputs: []*externalapi.DomainTransactionInput{input},
Outputs: []*externalapi.DomainTransactionOutput{output},
Payload: []byte{},
}, nil
}
func createTransactionThatSpentTheLockedOutput(txToSpend *externalapi.DomainTransaction, fee uint64,
redeemScript []byte, lockTime uint64) (*externalapi.DomainTransaction, error) {
signatureScript, err := txscript.PayToScriptHashSignatureScript(redeemScript, []byte{})
if err != nil {
return nil, err
}
scriptPublicKeyOutput, _ := testutils.OpTrueScript()
input := &externalapi.DomainTransactionInput{
PreviousOutpoint: externalapi.DomainOutpoint{
TransactionID: *consensushashing.TransactionID(txToSpend),
Index: 0,
},
SignatureScript: signatureScript,
Sequence: constants.MaxTxInSequenceNum - 1,
}
output := &externalapi.DomainTransactionOutput{
ScriptPublicKey: scriptPublicKeyOutput,
Value: txToSpend.Outputs[0].Value - fee,
}
return &externalapi.DomainTransaction{
Version: constants.MaxTransactionVersion,
Inputs: []*externalapi.DomainTransactionInput{input},
Outputs: []*externalapi.DomainTransactionOutput{output},
Payload: []byte{},
LockTime: lockTime, // less than 500 billion interpreted as a DAA score, and above as an UNIX timestamp.
}, nil
}