mirror of
https://github.com/lightningnetwork/lnd.git
synced 2024-11-19 09:53:54 +01:00
2037 lines
58 KiB
Go
2037 lines
58 KiB
Go
package input
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/sha256"
|
|
"encoding/hex"
|
|
"fmt"
|
|
"testing"
|
|
|
|
"github.com/btcsuite/btcd/btcec/v2"
|
|
"github.com/btcsuite/btcd/btcec/v2/ecdsa"
|
|
"github.com/btcsuite/btcd/btcutil"
|
|
"github.com/btcsuite/btcd/chaincfg/chainhash"
|
|
"github.com/btcsuite/btcd/txscript"
|
|
"github.com/btcsuite/btcd/wire"
|
|
"github.com/lightningnetwork/lnd/keychain"
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
// assertEngineExecution executes the VM returned by the newEngine closure,
|
|
// asserting the result matches the validity expectation. In the case where it
|
|
// doesn't match the expectation, it executes the script step-by-step and
|
|
// prints debug information to stdout.
|
|
func assertEngineExecution(t *testing.T, testNum int, valid bool,
|
|
newEngine func() (*txscript.Engine, error)) {
|
|
|
|
t.Helper()
|
|
|
|
// Get a new VM to execute.
|
|
vm, err := newEngine()
|
|
require.NoError(t, err, "unable to create engine")
|
|
|
|
// Execute the VM, only go on to the step-by-step execution if
|
|
// it doesn't validate as expected.
|
|
vmErr := vm.Execute()
|
|
if valid == (vmErr == nil) {
|
|
return
|
|
}
|
|
|
|
// Now that the execution didn't match what we expected, fetch a new VM
|
|
// to step through.
|
|
vm, err = newEngine()
|
|
require.NoError(t, err, "unable to create engine")
|
|
|
|
// This buffer will trace execution of the Script, dumping out
|
|
// to stdout.
|
|
var debugBuf bytes.Buffer
|
|
|
|
done := false
|
|
for !done {
|
|
dis, err := vm.DisasmPC()
|
|
if err != nil {
|
|
t.Fatalf("stepping (%v)\n", err)
|
|
}
|
|
debugBuf.WriteString(fmt.Sprintf("stepping %v\n", dis))
|
|
|
|
done, err = vm.Step()
|
|
if err != nil && valid {
|
|
t.Log(debugBuf.String())
|
|
t.Fatalf("spend test case #%v failed, spend "+
|
|
"should be valid: %v", testNum, err)
|
|
} else if err == nil && !valid && done {
|
|
t.Log(debugBuf.String())
|
|
t.Fatalf("spend test case #%v succeed, spend "+
|
|
"should be invalid: %v", testNum, err)
|
|
}
|
|
|
|
debugBuf.WriteString(fmt.Sprintf("Stack: %v", vm.GetStack()))
|
|
debugBuf.WriteString(fmt.Sprintf("AltStack: %v", vm.GetAltStack()))
|
|
}
|
|
|
|
// If we get to this point the unexpected case was not reached
|
|
// during step execution, which happens for some checks, like
|
|
// the clean-stack rule.
|
|
validity := "invalid"
|
|
if valid {
|
|
validity = "valid"
|
|
}
|
|
|
|
t.Log(debugBuf.String())
|
|
t.Fatalf("%v spend test case #%v execution ended with: %v", validity, testNum, vmErr)
|
|
}
|
|
|
|
// TestRevocationKeyDerivation tests that given a public key, and a revocation
|
|
// hash, the homomorphic revocation public and private key derivation work
|
|
// properly.
|
|
func TestRevocationKeyDerivation(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// First, we'll generate a commitment point, and a commitment secret.
|
|
// These will be used to derive the ultimate revocation keys.
|
|
revocationPreimage := testHdSeed.CloneBytes()
|
|
commitSecret, commitPoint := btcec.PrivKeyFromBytes(revocationPreimage)
|
|
|
|
// With the commitment secrets generated, we'll now create the base
|
|
// keys we'll use to derive the revocation key from.
|
|
basePriv, basePub := btcec.PrivKeyFromBytes(testWalletPrivKey)
|
|
|
|
// With the point and key obtained, we can now derive the revocation
|
|
// key itself.
|
|
revocationPub := DeriveRevocationPubkey(basePub, commitPoint)
|
|
|
|
// The revocation public key derived from the original public key, and
|
|
// the one derived from the private key should be identical.
|
|
revocationPriv := DeriveRevocationPrivKey(basePriv, commitSecret)
|
|
if !revocationPub.IsEqual(revocationPriv.PubKey()) {
|
|
t.Fatalf("derived public keys don't match!")
|
|
}
|
|
}
|
|
|
|
// TestTweakKeyDerivation tests that given a public key, and commitment tweak,
|
|
// then we're able to properly derive a tweaked private key that corresponds to
|
|
// the computed tweak public key. This scenario ensure that our key derivation
|
|
// for any of the non revocation keys on the commitment transaction is correct.
|
|
func TestTweakKeyDerivation(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// First, we'll generate a base public key that we'll be "tweaking".
|
|
baseSecret := testHdSeed.CloneBytes()
|
|
basePriv, basePub := btcec.PrivKeyFromBytes(baseSecret)
|
|
|
|
// With the base key create, we'll now create a commitment point, and
|
|
// from that derive the bytes we'll used to tweak the base public key.
|
|
commitPoint := ComputeCommitmentPoint(bobsPrivKey)
|
|
commitTweak := SingleTweakBytes(commitPoint, basePub)
|
|
|
|
// Next, we'll modify the public key. When we apply the same operation
|
|
// to the private key we should get a key that matches.
|
|
tweakedPub := TweakPubKey(basePub, commitPoint)
|
|
|
|
// Finally, attempt to re-generate the private key that matches the
|
|
// tweaked public key. The derived key should match exactly.
|
|
derivedPriv := TweakPrivKey(basePriv, commitTweak)
|
|
if !derivedPriv.PubKey().IsEqual(tweakedPub) {
|
|
t.Fatalf("pub keys don't match")
|
|
}
|
|
}
|
|
|
|
// makeWitnessTestCase is a helper function used within test cases involving
|
|
// the validity of a crafted witness. This function is a wrapper function which
|
|
// allows constructing table-driven tests. In the case of an error while
|
|
// constructing the witness, the test fails fatally.
|
|
func makeWitnessTestCase(t *testing.T,
|
|
f func() (wire.TxWitness, error)) func() wire.TxWitness {
|
|
|
|
return func() wire.TxWitness {
|
|
witness, err := f()
|
|
if err != nil {
|
|
t.Fatalf("unable to create witness test case: %v", err)
|
|
}
|
|
|
|
return witness
|
|
}
|
|
}
|
|
|
|
// TestHTLCSenderSpendValidation tests all possible valid+invalid redemption
|
|
// paths in the script used within the sender's commitment transaction for an
|
|
// outgoing HTLC.
|
|
//
|
|
// The following cases are exercised by this test:
|
|
// sender script:
|
|
// - receiver spends
|
|
// - revoke w/ sig
|
|
// - HTLC with invalid preimage size
|
|
// - HTLC with valid preimage size + sig
|
|
// - sender spends
|
|
// - invalid lock-time for CLTV
|
|
// - invalid sequence for CSV
|
|
// - valid lock-time+sequence, valid sig
|
|
func TestHTLCSenderSpendValidation(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// We generate a fake output, and the corresponding txin. This output
|
|
// doesn't need to exist, as we'll only be validating spending from the
|
|
// transaction that references this.
|
|
txid, err := chainhash.NewHash(testHdSeed.CloneBytes())
|
|
require.NoError(t, err, "unable to create txid")
|
|
fundingOut := &wire.OutPoint{
|
|
Hash: *txid,
|
|
Index: 50,
|
|
}
|
|
fakeFundingTxIn := wire.NewTxIn(fundingOut, nil, nil)
|
|
|
|
// Next we'll the commitment secret for our commitment tx and also the
|
|
// revocation key that we'll use as well.
|
|
revokePreimage := testHdSeed.CloneBytes()
|
|
commitSecret, commitPoint := btcec.PrivKeyFromBytes(revokePreimage)
|
|
|
|
// Generate a payment preimage to be used below.
|
|
paymentPreimage := revokePreimage
|
|
paymentPreimage[0] ^= 1
|
|
paymentHash := sha256.Sum256(paymentPreimage[:])
|
|
|
|
// We'll also need some tests keys for alice and bob, and metadata of
|
|
// the HTLC output.
|
|
aliceKeyPriv, aliceKeyPub := btcec.PrivKeyFromBytes(testWalletPrivKey)
|
|
bobKeyPriv, bobKeyPub := btcec.PrivKeyFromBytes(bobsPrivKey)
|
|
paymentAmt := btcutil.Amount(1 * 10e8)
|
|
|
|
aliceLocalKey := TweakPubKey(aliceKeyPub, commitPoint)
|
|
bobLocalKey := TweakPubKey(bobKeyPub, commitPoint)
|
|
|
|
// As we'll be modeling spends from Alice's commitment transaction,
|
|
// we'll be using Bob's base point for the revocation key.
|
|
revocationKey := DeriveRevocationPubkey(bobKeyPub, commitPoint)
|
|
|
|
bobCommitTweak := SingleTweakBytes(commitPoint, bobKeyPub)
|
|
aliceCommitTweak := SingleTweakBytes(commitPoint, aliceKeyPub)
|
|
|
|
// Finally, we'll create mock signers for both of them based on their
|
|
// private keys. This test simplifies a bit and uses the same key as
|
|
// the base point for all scripts and derivations.
|
|
bobSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{bobKeyPriv}}
|
|
aliceSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{aliceKeyPriv}}
|
|
|
|
var (
|
|
htlcWitnessScript, htlcPkScript []byte
|
|
htlcOutput *wire.TxOut
|
|
sweepTxSigHashes *txscript.TxSigHashes
|
|
senderCommitTx, sweepTx *wire.MsgTx
|
|
bobRecvrSig *ecdsa.Signature
|
|
bobSigHash txscript.SigHashType
|
|
)
|
|
|
|
// genCommitTx generates a commitment tx where the htlc output requires
|
|
// confirmation to be spent according to 'confirmed'.
|
|
genCommitTx := func(confirmed bool) {
|
|
// Generate the raw HTLC redemption scripts, and its p2wsh
|
|
// counterpart.
|
|
htlcWitnessScript, err = SenderHTLCScript(
|
|
aliceLocalKey, bobLocalKey, revocationKey,
|
|
paymentHash[:], confirmed,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unable to create htlc sender script: %v", err)
|
|
}
|
|
htlcPkScript, err = WitnessScriptHash(htlcWitnessScript)
|
|
if err != nil {
|
|
t.Fatalf("unable to create p2wsh htlc script: %v", err)
|
|
}
|
|
|
|
// This will be Alice's commitment transaction. In this
|
|
// scenario Alice is sending an HTLC to a node she has a path
|
|
// to (could be Bob, could be multiple hops down, it doesn't
|
|
// really matter).
|
|
htlcOutput = &wire.TxOut{
|
|
Value: int64(paymentAmt),
|
|
PkScript: htlcPkScript,
|
|
}
|
|
senderCommitTx = wire.NewMsgTx(2)
|
|
senderCommitTx.AddTxIn(fakeFundingTxIn)
|
|
senderCommitTx.AddTxOut(htlcOutput)
|
|
}
|
|
|
|
// genSweepTx generates a sweep of the senderCommitTx, and sets the
|
|
// sequence and sighash single|anyonecanspend if confirmed is true.
|
|
genSweepTx := func(confirmed bool) {
|
|
prevOut := &wire.OutPoint{
|
|
Hash: senderCommitTx.TxHash(),
|
|
Index: 0,
|
|
}
|
|
|
|
sweepTx = wire.NewMsgTx(2)
|
|
|
|
sweepTx.AddTxIn(wire.NewTxIn(prevOut, nil, nil))
|
|
if confirmed {
|
|
sweepTx.TxIn[0].Sequence = LockTimeToSequence(false, 1)
|
|
}
|
|
|
|
sweepTx.AddTxOut(
|
|
&wire.TxOut{
|
|
PkScript: []byte("doesn't matter"),
|
|
Value: 1 * 10e8,
|
|
},
|
|
)
|
|
|
|
sweepTxSigHashes = NewTxSigHashesV0Only(sweepTx)
|
|
|
|
bobSigHash = txscript.SigHashAll
|
|
if confirmed {
|
|
bobSigHash = txscript.SigHashSingle | txscript.SigHashAnyOneCanPay
|
|
}
|
|
|
|
// We'll also generate a signature on the sweep transaction above
|
|
// that will act as Bob's signature to Alice for the second level HTLC
|
|
// transaction.
|
|
bobSignDesc := SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: bobCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: bobSigHash,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
bobSig, err := bobSigner.SignOutputRaw(sweepTx, &bobSignDesc)
|
|
if err != nil {
|
|
t.Fatalf("unable to generate alice signature: %v", err)
|
|
}
|
|
|
|
bobRecvrSig, err = ecdsa.ParseDERSignature(bobSig.Serialize())
|
|
if err != nil {
|
|
t.Fatalf("unable to parse signature: %v", err)
|
|
}
|
|
}
|
|
|
|
testCases := []struct {
|
|
witness func() wire.TxWitness
|
|
valid bool
|
|
}{
|
|
{
|
|
// revoke w/ sig
|
|
// TODO(roasbeef): test invalid revoke
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
genCommitTx(false)
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
DoubleTweak: commitSecret,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return SenderHtlcSpendRevokeWithKey(bobSigner, signDesc,
|
|
revocationKey, sweepTx)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// HTLC with invalid preimage size
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
genCommitTx(false)
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: bobCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return SenderHtlcSpendRedeem(bobSigner, signDesc,
|
|
sweepTx,
|
|
// Invalid preimage length
|
|
bytes.Repeat([]byte{1}, 45))
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// HTLC with valid preimage size + sig
|
|
// TODO(roasbeef): invalid preimage
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
genCommitTx(false)
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: bobCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return SenderHtlcSpendRedeem(bobSigner, signDesc,
|
|
sweepTx, paymentPreimage)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// HTLC with valid preimage size + sig, and with
|
|
// enforced locktime in HTLC script.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
// Make a commit tx that needs confirmation for
|
|
// HTLC output to be spent.
|
|
genCommitTx(true)
|
|
|
|
// Generate a sweep with the locktime set.
|
|
genSweepTx(true)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: bobCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return SenderHtlcSpendRedeem(bobSigner, signDesc,
|
|
sweepTx, paymentPreimage)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// HTLC with valid preimage size + sig, but trying to
|
|
// spend CSV output without sequence set.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
// Generate commitment tx with 1 CSV locked
|
|
// HTLC.
|
|
genCommitTx(true)
|
|
|
|
// Generate sweep tx that doesn't have locktime
|
|
// enabled.
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: bobCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return SenderHtlcSpendRedeem(bobSigner, signDesc,
|
|
sweepTx, paymentPreimage)
|
|
}),
|
|
false,
|
|
},
|
|
|
|
{
|
|
// valid spend to the transition the state of the HTLC
|
|
// output with the second level HTLC timeout
|
|
// transaction.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
genCommitTx(false)
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
SingleTweak: aliceCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return SenderHtlcSpendTimeout(
|
|
bobRecvrSig, bobSigHash, aliceSigner,
|
|
signDesc, sweepTx,
|
|
)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// valid spend to the transition the state of the HTLC
|
|
// output with the second level HTLC timeout
|
|
// transaction.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
// Make a commit tx that needs confirmation for
|
|
// HTLC output to be spent.
|
|
genCommitTx(true)
|
|
|
|
// Generate a sweep with the locktime set.
|
|
genSweepTx(true)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
SingleTweak: aliceCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return SenderHtlcSpendTimeout(
|
|
bobRecvrSig, bobSigHash, aliceSigner,
|
|
signDesc, sweepTx,
|
|
)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// valid spend to the transition the state of the HTLC
|
|
// output with the second level HTLC timeout
|
|
// transaction.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
// Generate commitment tx with 1 CSV locked
|
|
// HTLC.
|
|
genCommitTx(true)
|
|
|
|
// Generate sweep tx that doesn't have locktime
|
|
// enabled.
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
SingleTweak: aliceCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return SenderHtlcSpendTimeout(
|
|
bobRecvrSig, bobSigHash, aliceSigner,
|
|
signDesc, sweepTx,
|
|
)
|
|
}),
|
|
false,
|
|
},
|
|
}
|
|
|
|
// TODO(roasbeef): set of cases to ensure able to sign w/ keypath and
|
|
// not
|
|
|
|
for i, testCase := range testCases {
|
|
sweepTx.TxIn[0].Witness = testCase.witness()
|
|
|
|
newEngine := func() (*txscript.Engine, error) {
|
|
return txscript.NewEngine(
|
|
htlcPkScript, sweepTx, 0,
|
|
txscript.StandardVerifyFlags, nil, nil,
|
|
int64(paymentAmt),
|
|
txscript.NewCannedPrevOutputFetcher(
|
|
htlcPkScript, int64(paymentAmt),
|
|
),
|
|
)
|
|
}
|
|
|
|
assertEngineExecution(t, i, testCase.valid, newEngine)
|
|
}
|
|
}
|
|
|
|
// TestHTLCReceiverSpendValidation tests all possible valid+invalid redemption
|
|
// paths in the script used within the receiver's commitment transaction for an
|
|
// incoming HTLC.
|
|
//
|
|
// The following cases are exercised by this test:
|
|
// - receiver spends
|
|
// 1. HTLC redemption w/ invalid preimage size
|
|
// 2. HTLC redemption w/ invalid sequence
|
|
// 3. HTLC redemption w/ valid preimage size
|
|
// - sender spends
|
|
// 1. revoke w/ sig
|
|
// 2. refund w/ invalid lock time
|
|
// 3. refund w/ valid lock time
|
|
func TestHTLCReceiverSpendValidation(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// We generate a fake output, and the corresponding txin. This output
|
|
// doesn't need to exist, as we'll only be validating spending from the
|
|
// transaction that references this.
|
|
txid, err := chainhash.NewHash(testHdSeed.CloneBytes())
|
|
require.NoError(t, err, "unable to create txid")
|
|
fundingOut := &wire.OutPoint{
|
|
Hash: *txid,
|
|
Index: 50,
|
|
}
|
|
fakeFundingTxIn := wire.NewTxIn(fundingOut, nil, nil)
|
|
|
|
// Next we'll the commitment secret for our commitment tx and also the
|
|
// revocation key that we'll use as well.
|
|
revokePreimage := testHdSeed.CloneBytes()
|
|
commitSecret, commitPoint := btcec.PrivKeyFromBytes(revokePreimage)
|
|
|
|
// Generate a payment preimage to be used below.
|
|
paymentPreimage := revokePreimage
|
|
paymentPreimage[0] ^= 1
|
|
paymentHash := sha256.Sum256(paymentPreimage[:])
|
|
|
|
// We'll also need some tests keys for alice and bob, and metadata of
|
|
// the HTLC output.
|
|
aliceKeyPriv, aliceKeyPub := btcec.PrivKeyFromBytes(testWalletPrivKey)
|
|
bobKeyPriv, bobKeyPub := btcec.PrivKeyFromBytes(bobsPrivKey)
|
|
paymentAmt := btcutil.Amount(1 * 10e8)
|
|
cltvTimeout := uint32(8)
|
|
|
|
aliceLocalKey := TweakPubKey(aliceKeyPub, commitPoint)
|
|
bobLocalKey := TweakPubKey(bobKeyPub, commitPoint)
|
|
|
|
// As we'll be modeling spends from Bob's commitment transaction, we'll
|
|
// be using Alice's base point for the revocation key.
|
|
revocationKey := DeriveRevocationPubkey(aliceKeyPub, commitPoint)
|
|
|
|
bobCommitTweak := SingleTweakBytes(commitPoint, bobKeyPub)
|
|
aliceCommitTweak := SingleTweakBytes(commitPoint, aliceKeyPub)
|
|
|
|
// Finally, we'll create mock signers for both of them based on their
|
|
// private keys. This test simplifies a bit and uses the same key as
|
|
// the base point for all scripts and derivations.
|
|
bobSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{bobKeyPriv}}
|
|
aliceSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{aliceKeyPriv}}
|
|
|
|
var (
|
|
htlcWitnessScript, htlcPkScript []byte
|
|
htlcOutput *wire.TxOut
|
|
receiverCommitTx, sweepTx *wire.MsgTx
|
|
sweepTxSigHashes *txscript.TxSigHashes
|
|
aliceSenderSig *ecdsa.Signature
|
|
aliceSigHash txscript.SigHashType
|
|
)
|
|
|
|
genCommitTx := func(confirmed bool) {
|
|
// Generate the raw HTLC redemption scripts, and its p2wsh
|
|
// counterpart.
|
|
htlcWitnessScript, err = ReceiverHTLCScript(
|
|
cltvTimeout, aliceLocalKey, bobLocalKey, revocationKey,
|
|
paymentHash[:], confirmed,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unable to create htlc sender script: %v", err)
|
|
}
|
|
htlcPkScript, err = WitnessScriptHash(htlcWitnessScript)
|
|
if err != nil {
|
|
t.Fatalf("unable to create p2wsh htlc script: %v", err)
|
|
}
|
|
|
|
// This will be Bob's commitment transaction. In this scenario Alice is
|
|
// sending an HTLC to a node she has a path to (could be Bob, could be
|
|
// multiple hops down, it doesn't really matter).
|
|
htlcOutput = &wire.TxOut{
|
|
Value: int64(paymentAmt),
|
|
PkScript: htlcWitnessScript,
|
|
}
|
|
|
|
receiverCommitTx = wire.NewMsgTx(2)
|
|
receiverCommitTx.AddTxIn(fakeFundingTxIn)
|
|
receiverCommitTx.AddTxOut(htlcOutput)
|
|
}
|
|
|
|
genSweepTx := func(confirmed bool) {
|
|
prevOut := &wire.OutPoint{
|
|
Hash: receiverCommitTx.TxHash(),
|
|
Index: 0,
|
|
}
|
|
|
|
sweepTx = wire.NewMsgTx(2)
|
|
sweepTx.AddTxIn(&wire.TxIn{
|
|
PreviousOutPoint: *prevOut,
|
|
})
|
|
if confirmed {
|
|
sweepTx.TxIn[0].Sequence = LockTimeToSequence(false, 1)
|
|
}
|
|
|
|
sweepTx.AddTxOut(
|
|
&wire.TxOut{
|
|
PkScript: []byte("doesn't matter"),
|
|
Value: 1 * 10e8,
|
|
},
|
|
)
|
|
sweepTxSigHashes = NewTxSigHashesV0Only(sweepTx)
|
|
|
|
aliceSigHash = txscript.SigHashAll
|
|
if confirmed {
|
|
aliceSigHash = txscript.SigHashSingle | txscript.SigHashAnyOneCanPay
|
|
}
|
|
|
|
// We'll also generate a signature on the sweep transaction above
|
|
// that will act as Alice's signature to Bob for the second level HTLC
|
|
// transaction.
|
|
aliceSignDesc := SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
SingleTweak: aliceCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: aliceSigHash,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
aliceSig, err := aliceSigner.SignOutputRaw(sweepTx, &aliceSignDesc)
|
|
if err != nil {
|
|
t.Fatalf("unable to generate alice signature: %v", err)
|
|
}
|
|
|
|
aliceSenderSig, err = ecdsa.ParseDERSignature(
|
|
aliceSig.Serialize(),
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unable to parse signature: %v", err)
|
|
}
|
|
}
|
|
|
|
// TODO(roasbeef): modify valid to check precise script errors?
|
|
testCases := []struct {
|
|
witness func() wire.TxWitness
|
|
valid bool
|
|
}{
|
|
{
|
|
// HTLC redemption w/ invalid preimage size
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
genCommitTx(false)
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: bobCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return ReceiverHtlcSpendRedeem(
|
|
aliceSenderSig, aliceSigHash,
|
|
bytes.Repeat([]byte{1}, 45), bobSigner,
|
|
signDesc, sweepTx,
|
|
)
|
|
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// HTLC redemption w/ valid preimage size
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
genCommitTx(false)
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: bobCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return ReceiverHtlcSpendRedeem(
|
|
aliceSenderSig, aliceSigHash,
|
|
paymentPreimage, bobSigner,
|
|
signDesc, sweepTx,
|
|
)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// revoke w/ sig
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
genCommitTx(false)
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
DoubleTweak: commitSecret,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return ReceiverHtlcSpendRevokeWithKey(aliceSigner,
|
|
signDesc, revocationKey, sweepTx)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// HTLC redemption w/ valid preimage size, and with
|
|
// enforced locktime in HTLC scripts.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
// Make a commit tx that needs confirmation for
|
|
// HTLC output to be spent.
|
|
genCommitTx(true)
|
|
|
|
// Generate a sweep with the locktime set.
|
|
genSweepTx(true)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: bobCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return ReceiverHtlcSpendRedeem(
|
|
aliceSenderSig, aliceSigHash,
|
|
paymentPreimage, bobSigner,
|
|
signDesc, sweepTx,
|
|
)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// HTLC redemption w/ valid preimage size, but trying
|
|
// to spend CSV output without sequence set.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
// Generate commitment tx with 1 CSV locked
|
|
// HTLC.
|
|
genCommitTx(true)
|
|
|
|
// Generate sweep tx that doesn't have locktime
|
|
// enabled.
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: bobCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return ReceiverHtlcSpendRedeem(
|
|
aliceSenderSig, aliceSigHash,
|
|
paymentPreimage, bobSigner, signDesc,
|
|
sweepTx,
|
|
)
|
|
}),
|
|
false,
|
|
},
|
|
|
|
{
|
|
// refund w/ invalid lock time
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
genCommitTx(false)
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
SingleTweak: aliceCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return ReceiverHtlcSpendTimeout(aliceSigner, signDesc,
|
|
sweepTx, int32(cltvTimeout-2))
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// refund w/ valid lock time
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
genCommitTx(false)
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
SingleTweak: aliceCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return ReceiverHtlcSpendTimeout(aliceSigner, signDesc,
|
|
sweepTx, int32(cltvTimeout))
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// refund w/ valid lock time, and enforced locktime in
|
|
// HTLC scripts.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
// Make a commit tx that needs confirmation for
|
|
// HTLC output to be spent.
|
|
genCommitTx(true)
|
|
|
|
// Generate a sweep with the locktime set.
|
|
genSweepTx(true)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
SingleTweak: aliceCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return ReceiverHtlcSpendTimeout(aliceSigner, signDesc,
|
|
sweepTx, int32(cltvTimeout))
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// refund w/ valid lock time, but no sequence set in
|
|
// sweep tx trying to spend CSV locked HTLC output.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
// Generate commitment tx with 1 CSV locked
|
|
// HTLC.
|
|
genCommitTx(true)
|
|
|
|
// Generate sweep tx that doesn't have locktime
|
|
// enabled.
|
|
genSweepTx(false)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
SingleTweak: aliceCommitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return ReceiverHtlcSpendTimeout(aliceSigner, signDesc,
|
|
sweepTx, int32(cltvTimeout))
|
|
}),
|
|
false,
|
|
},
|
|
}
|
|
|
|
for i, testCase := range testCases {
|
|
sweepTx.TxIn[0].Witness = testCase.witness()
|
|
|
|
newEngine := func() (*txscript.Engine, error) {
|
|
return txscript.NewEngine(
|
|
htlcPkScript,
|
|
sweepTx, 0, txscript.StandardVerifyFlags, nil,
|
|
nil, int64(paymentAmt),
|
|
txscript.NewCannedPrevOutputFetcher(
|
|
htlcPkScript, int64(paymentAmt),
|
|
),
|
|
)
|
|
}
|
|
|
|
assertEngineExecution(t, i, testCase.valid, newEngine)
|
|
}
|
|
}
|
|
|
|
// TestSecondLevelHtlcSpends tests all the possible redemption clauses from the
|
|
// HTLC success and timeout covenant transactions.
|
|
func TestSecondLevelHtlcSpends(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// We'll start be creating a creating a 2BTC HTLC.
|
|
const htlcAmt = btcutil.Amount(2 * 10e8)
|
|
|
|
// In all of our scenarios, the CSV timeout to claim a self output will
|
|
// be 5 blocks.
|
|
const claimDelay = 5
|
|
|
|
// First we'll set up some initial key state for Alice and Bob that
|
|
// will be used in the scripts we created below.
|
|
aliceKeyPriv, aliceKeyPub := btcec.PrivKeyFromBytes(testWalletPrivKey)
|
|
bobKeyPriv, bobKeyPub := btcec.PrivKeyFromBytes(bobsPrivKey)
|
|
|
|
revokePreimage := testHdSeed.CloneBytes()
|
|
commitSecret, commitPoint := btcec.PrivKeyFromBytes(revokePreimage)
|
|
|
|
// As we're modeling this as Bob sweeping the HTLC on-chain from his
|
|
// commitment transaction after a period of time, we'll be using a
|
|
// revocation key derived from Alice's base point and his secret.
|
|
revocationKey := DeriveRevocationPubkey(aliceKeyPub, commitPoint)
|
|
|
|
// Next, craft a fake HTLC outpoint that we'll use to generate the
|
|
// sweeping transaction using.
|
|
txid, err := chainhash.NewHash(testHdSeed.CloneBytes())
|
|
require.NoError(t, err, "unable to create txid")
|
|
htlcOutPoint := &wire.OutPoint{
|
|
Hash: *txid,
|
|
Index: 0,
|
|
}
|
|
sweepTx := wire.NewMsgTx(2)
|
|
sweepTx.AddTxIn(wire.NewTxIn(htlcOutPoint, nil, nil))
|
|
sweepTx.AddTxOut(
|
|
&wire.TxOut{
|
|
PkScript: []byte("doesn't matter"),
|
|
Value: 1 * 10e8,
|
|
},
|
|
)
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
|
|
// The delay key will be crafted using Bob's public key as the output
|
|
// we created will be spending from Alice's commitment transaction.
|
|
delayKey := TweakPubKey(bobKeyPub, commitPoint)
|
|
|
|
// The commit tweak will be required in order for Bob to derive the
|
|
// proper key need to spend the output.
|
|
commitTweak := SingleTweakBytes(commitPoint, bobKeyPub)
|
|
|
|
// Finally we'll generate the HTLC script itself that we'll be spending
|
|
// from. The revocation clause can be claimed by Alice, while Bob can
|
|
// sweep the output after a particular delay.
|
|
htlcWitnessScript, err := SecondLevelHtlcScript(revocationKey,
|
|
delayKey, claimDelay)
|
|
require.NoError(t, err, "unable to create htlc script")
|
|
htlcPkScript, err := WitnessScriptHash(htlcWitnessScript)
|
|
require.NoError(t, err, "unable to create htlc output")
|
|
|
|
htlcOutput := &wire.TxOut{
|
|
PkScript: htlcPkScript,
|
|
Value: int64(htlcAmt),
|
|
}
|
|
|
|
// TODO(roasbeef): make actually use timeout/success txns?
|
|
|
|
// Finally, we'll create mock signers for both of them based on their
|
|
// private keys. This test simplifies a bit and uses the same key as
|
|
// the base point for all scripts and derivations.
|
|
bobSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{bobKeyPriv}}
|
|
aliceSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{aliceKeyPriv}}
|
|
|
|
testCases := []struct {
|
|
witness func() wire.TxWitness
|
|
valid bool
|
|
}{
|
|
{
|
|
// Sender of the HTLC attempts to activate the
|
|
// revocation clause, but uses the wrong key (fails to
|
|
// use the double tweak in this case).
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return HtlcSpendRevoke(aliceSigner, signDesc,
|
|
sweepTx)
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// Sender of HTLC activates the revocation clause.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
DoubleTweak: commitSecret,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return HtlcSpendRevoke(aliceSigner, signDesc,
|
|
sweepTx)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// Receiver of the HTLC attempts to sweep, but tries to
|
|
// do so pre-maturely with a smaller CSV delay (2
|
|
// blocks instead of 5 blocks).
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: commitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return HtlcSpendSuccess(bobSigner, signDesc,
|
|
sweepTx, claimDelay-3)
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// Receiver of the HTLC sweeps with the proper CSV
|
|
// delay, but uses the wrong key (leaves off the single
|
|
// tweak).
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return HtlcSpendSuccess(bobSigner, signDesc,
|
|
sweepTx, claimDelay)
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// Receiver of the HTLC sweeps with the proper CSV
|
|
// delay, and the correct key.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: commitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return HtlcSpendSuccess(bobSigner, signDesc,
|
|
sweepTx, claimDelay)
|
|
}),
|
|
true,
|
|
},
|
|
}
|
|
|
|
for i, testCase := range testCases {
|
|
sweepTx.TxIn[0].Witness = testCase.witness()
|
|
|
|
newEngine := func() (*txscript.Engine, error) {
|
|
return txscript.NewEngine(
|
|
htlcPkScript,
|
|
sweepTx, 0, txscript.StandardVerifyFlags, nil,
|
|
nil, int64(htlcAmt),
|
|
txscript.NewCannedPrevOutputFetcher(
|
|
htlcPkScript, int64(htlcAmt),
|
|
),
|
|
)
|
|
}
|
|
|
|
assertEngineExecution(t, i, testCase.valid, newEngine)
|
|
}
|
|
}
|
|
|
|
// TestLeaseSecondLevelHtlcSpends tests all the possible redemption clauses from
|
|
// the HTLC success and timeout covenant transactions in script enforced lease
|
|
// commitments.
|
|
func TestLeaseSecondLevelHtlcSpends(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// We'll start be creating a creating a 2BTC HTLC.
|
|
const htlcAmt = btcutil.Amount(2 * 10e8)
|
|
|
|
// In all of our scenarios, the CSV timeout to claim a self output will
|
|
// be 5 blocks.
|
|
const claimDelay = 5
|
|
|
|
// In all of our scenarios, the CLTV timelock will expire at height
|
|
// 1337.
|
|
const leaseExpiry = 1337
|
|
|
|
// First we'll set up some initial key state for Alice and Bob that
|
|
// will be used in the scripts we created below.
|
|
aliceKeyPriv, aliceKeyPub := btcec.PrivKeyFromBytes(testWalletPrivKey)
|
|
bobKeyPriv, bobKeyPub := btcec.PrivKeyFromBytes(bobsPrivKey)
|
|
|
|
revokePreimage := testHdSeed.CloneBytes()
|
|
commitSecret, commitPoint := btcec.PrivKeyFromBytes(revokePreimage)
|
|
|
|
// As we're modeling this as Bob sweeping the HTLC on-chain from his
|
|
// commitment transaction after a period of time, we'll be using a
|
|
// revocation key derived from Alice's base point and his secret.
|
|
revocationKey := DeriveRevocationPubkey(aliceKeyPub, commitPoint)
|
|
|
|
// Next, craft a fake HTLC outpoint that we'll use to generate the
|
|
// sweeping transaction using.
|
|
txid, err := chainhash.NewHash(testHdSeed.CloneBytes())
|
|
require.NoError(t, err)
|
|
htlcOutPoint := &wire.OutPoint{
|
|
Hash: *txid,
|
|
Index: 0,
|
|
}
|
|
sweepTx := wire.NewMsgTx(2)
|
|
sweepTx.AddTxIn(wire.NewTxIn(htlcOutPoint, nil, nil))
|
|
sweepTx.AddTxOut(
|
|
&wire.TxOut{
|
|
PkScript: []byte("doesn't matter"),
|
|
Value: 1 * 10e8,
|
|
},
|
|
)
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
|
|
// The delay key will be crafted using Bob's public key as the output
|
|
// we created will be spending from Alice's commitment transaction.
|
|
delayKey := TweakPubKey(bobKeyPub, commitPoint)
|
|
|
|
// The commit tweak will be required in order for Bob to derive the
|
|
// proper key need to spend the output.
|
|
commitTweak := SingleTweakBytes(commitPoint, bobKeyPub)
|
|
|
|
// Finally we'll generate the HTLC script itself that we'll be spending
|
|
// from. The revocation clause can be claimed by Alice, while Bob can
|
|
// sweep the output after a particular delay.
|
|
htlcWitnessScript, err := LeaseSecondLevelHtlcScript(
|
|
revocationKey, delayKey, claimDelay, leaseExpiry,
|
|
)
|
|
require.NoError(t, err)
|
|
htlcPkScript, err := WitnessScriptHash(htlcWitnessScript)
|
|
require.NoError(t, err)
|
|
|
|
htlcOutput := &wire.TxOut{
|
|
PkScript: htlcPkScript,
|
|
Value: int64(htlcAmt),
|
|
}
|
|
|
|
// Finally, we'll create mock signers for both of them based on their
|
|
// private keys. This test simplifies a bit and uses the same key as
|
|
// the base point for all scripts and derivations.
|
|
bobSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{bobKeyPriv}}
|
|
aliceSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{aliceKeyPriv}}
|
|
|
|
testCases := []struct {
|
|
witness func() wire.TxWitness
|
|
valid bool
|
|
}{
|
|
{
|
|
// Sender of the HTLC attempts to activate the
|
|
// revocation clause, but uses the wrong key (fails to
|
|
// use the double tweak in this case).
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return HtlcSpendRevoke(
|
|
aliceSigner, signDesc, sweepTx,
|
|
)
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// Sender of HTLC activates the revocation clause.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
DoubleTweak: commitSecret,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return HtlcSpendRevoke(
|
|
aliceSigner, signDesc, sweepTx,
|
|
)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// Receiver of the HTLC attempts to sweep, but tries to
|
|
// do so pre-maturely with a smaller CSV delay (2
|
|
// blocks instead of 5 blocks), even after the CLTV
|
|
// timelock expires.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.LockTime = leaseExpiry
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: commitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return HtlcSpendSuccess(
|
|
bobSigner, signDesc, sweepTx, claimDelay-3,
|
|
)
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// Receiver of the HTLC sweeps with the proper CSV delay
|
|
// and after the CLTV timelock expires, but uses the
|
|
// wrong key (leaves off the single tweak).
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.LockTime = leaseExpiry
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return HtlcSpendSuccess(
|
|
bobSigner, signDesc, sweepTx, claimDelay,
|
|
)
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// Receiver of the HTLC sweeps with the proper CSV
|
|
// delay, and the correct key, but before the CTLV
|
|
// timelock expires.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.LockTime = 0
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: commitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return HtlcSpendSuccess(
|
|
bobSigner, signDesc, sweepTx, claimDelay,
|
|
)
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// Receiver of the HTLC sweeps with the proper CSV
|
|
// delay, and the correct key after the CTLV timelock
|
|
// expires.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.LockTime = leaseExpiry
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
SingleTweak: commitTweak,
|
|
WitnessScript: htlcWitnessScript,
|
|
Output: htlcOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return HtlcSpendSuccess(
|
|
bobSigner, signDesc, sweepTx, claimDelay,
|
|
)
|
|
}),
|
|
true,
|
|
},
|
|
}
|
|
|
|
for i, testCase := range testCases {
|
|
sweepTx.TxIn[0].Witness = testCase.witness()
|
|
|
|
newEngine := func() (*txscript.Engine, error) {
|
|
return txscript.NewEngine(
|
|
htlcPkScript, sweepTx, 0,
|
|
txscript.StandardVerifyFlags, nil, nil,
|
|
int64(htlcAmt),
|
|
txscript.NewCannedPrevOutputFetcher(
|
|
htlcPkScript, int64(htlcAmt),
|
|
),
|
|
)
|
|
}
|
|
|
|
assertEngineExecution(t, i, testCase.valid, newEngine)
|
|
}
|
|
}
|
|
|
|
// TestLeaseCommmitSpendToSelf tests all the possible redemption clauses from
|
|
// the to_self output in a script enforced lease commitment transaction.
|
|
func TestLeaseCommmitSpendToSelf(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
const (
|
|
outputVal = btcutil.Amount(2 * 10e8)
|
|
csvDelay = 5
|
|
leaseExpiry = 1337
|
|
)
|
|
|
|
// Set up some initial key state for Alice and Bob that will be used in
|
|
// the scripts we created below.
|
|
aliceKeyPriv, aliceKeyPub := btcec.PrivKeyFromBytes(testWalletPrivKey)
|
|
bobKeyPriv, bobKeyPub := btcec.PrivKeyFromBytes(bobsPrivKey)
|
|
|
|
// We'll have Bob take the revocation path in some cases.
|
|
revokePreimage := testHdSeed.CloneBytes()
|
|
commitSecret, commitPoint := btcec.PrivKeyFromBytes(revokePreimage)
|
|
revocationKey := DeriveRevocationPubkey(bobKeyPub, commitPoint)
|
|
|
|
// Construct the script enforced lease to_self commitment transaction
|
|
// output.
|
|
txid, err := chainhash.NewHash(testHdSeed.CloneBytes())
|
|
require.NoError(t, err)
|
|
commitOut := &wire.OutPoint{
|
|
Hash: *txid,
|
|
Index: 0,
|
|
}
|
|
commitScript, err := LeaseCommitScriptToSelf(
|
|
aliceKeyPub, revocationKey, csvDelay, leaseExpiry,
|
|
)
|
|
require.NoError(t, err)
|
|
commitPkScript, err := WitnessScriptHash(commitScript)
|
|
require.NoError(t, err)
|
|
|
|
commitOutput := &wire.TxOut{
|
|
PkScript: commitPkScript,
|
|
Value: int64(outputVal),
|
|
}
|
|
|
|
sweepTx := wire.NewMsgTx(2)
|
|
sweepTx.AddTxIn(wire.NewTxIn(commitOut, nil, nil))
|
|
sweepTx.AddTxOut(
|
|
&wire.TxOut{
|
|
PkScript: []byte("doesn't matter"),
|
|
Value: 1 * 10e8,
|
|
},
|
|
)
|
|
|
|
// Create mock signers for both parties to ensure signatures are
|
|
// produced and verified correctly.
|
|
aliceSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{aliceKeyPriv}}
|
|
bobSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{bobKeyPriv}}
|
|
|
|
testCases := []struct {
|
|
witness func() wire.TxWitness
|
|
valid bool
|
|
}{
|
|
{
|
|
// Bob can spend with his revocation key, but not
|
|
// without the proper tweak.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
WitnessScript: commitScript,
|
|
Output: commitOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return CommitSpendRevoke(
|
|
bobSigner, signDesc, sweepTx,
|
|
)
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// Bob can spend with his revocation key with the proper
|
|
// tweak.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: bobKeyPub,
|
|
},
|
|
DoubleTweak: commitSecret,
|
|
WitnessScript: commitScript,
|
|
Output: commitOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return CommitSpendRevoke(
|
|
bobSigner, signDesc, sweepTx,
|
|
)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// Alice cannot spend with the proper key before the CSV
|
|
// delay and after the CLTV timelock has expired.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.LockTime = leaseExpiry
|
|
sweepTx.TxIn[0].Sequence = LockTimeToSequence(
|
|
false, csvDelay/2,
|
|
)
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
DoubleTweak: commitSecret,
|
|
WitnessScript: commitScript,
|
|
Output: commitOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return CommitSpendTimeout(
|
|
aliceSigner, signDesc, sweepTx,
|
|
)
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// Alice cannot spend with the proper key after the CSV
|
|
// delay and before the CLTV timelock has expired.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.LockTime = 0
|
|
sweepTx.TxIn[0].Sequence = LockTimeToSequence(
|
|
false, csvDelay,
|
|
)
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
DoubleTweak: commitSecret,
|
|
WitnessScript: commitScript,
|
|
Output: commitOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return CommitSpendTimeout(
|
|
aliceSigner, signDesc, sweepTx,
|
|
)
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// Alice can spend with the proper key after the CSV
|
|
// delay and CLTV timelock have expired.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.LockTime = leaseExpiry
|
|
sweepTx.TxIn[0].Sequence = LockTimeToSequence(
|
|
false, csvDelay,
|
|
)
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
WitnessScript: commitScript,
|
|
Output: commitOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return CommitSpendTimeout(
|
|
aliceSigner, signDesc, sweepTx,
|
|
)
|
|
}),
|
|
true,
|
|
},
|
|
}
|
|
|
|
for i, testCase := range testCases {
|
|
sweepTx.TxIn[0].Witness = testCase.witness()
|
|
|
|
newEngine := func() (*txscript.Engine, error) {
|
|
return txscript.NewEngine(
|
|
commitPkScript,
|
|
sweepTx, 0, txscript.StandardVerifyFlags, nil,
|
|
nil, int64(outputVal),
|
|
txscript.NewCannedPrevOutputFetcher(
|
|
commitPkScript, int64(outputVal),
|
|
),
|
|
)
|
|
}
|
|
|
|
assertEngineExecution(t, i, testCase.valid, newEngine)
|
|
}
|
|
}
|
|
|
|
// TestCommitSpendToRemoteConfirmed checks that the delayed version of the
|
|
// to_remote version can only be spent by the owner, and after one
|
|
// confirmation.
|
|
func TestCommitSpendToRemoteConfirmed(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
const outputVal = btcutil.Amount(2 * 10e8)
|
|
|
|
aliceKeyPriv, aliceKeyPub := btcec.PrivKeyFromBytes(testWalletPrivKey)
|
|
|
|
txid, err := chainhash.NewHash(testHdSeed.CloneBytes())
|
|
require.NoError(t, err, "unable to create txid")
|
|
commitOut := &wire.OutPoint{
|
|
Hash: *txid,
|
|
Index: 0,
|
|
}
|
|
commitScript, err := CommitScriptToRemoteConfirmed(aliceKeyPub)
|
|
require.NoError(t, err, "unable to create htlc script")
|
|
commitPkScript, err := WitnessScriptHash(commitScript)
|
|
require.NoError(t, err, "unable to create htlc output")
|
|
|
|
commitOutput := &wire.TxOut{
|
|
PkScript: commitPkScript,
|
|
Value: int64(outputVal),
|
|
}
|
|
|
|
sweepTx := wire.NewMsgTx(2)
|
|
sweepTx.AddTxIn(wire.NewTxIn(commitOut, nil, nil))
|
|
sweepTx.AddTxOut(
|
|
&wire.TxOut{
|
|
PkScript: []byte("doesn't matter"),
|
|
Value: 1 * 10e8,
|
|
},
|
|
)
|
|
|
|
aliceSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{aliceKeyPriv}}
|
|
|
|
testCases := []struct {
|
|
witness func() wire.TxWitness
|
|
valid bool
|
|
}{
|
|
{
|
|
// Alice can spend after the a CSV delay has passed.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.TxIn[0].Sequence = LockTimeToSequence(false, 1)
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
WitnessScript: commitScript,
|
|
Output: commitOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return CommitSpendToRemoteConfirmed(aliceSigner, signDesc,
|
|
sweepTx)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// Alice cannot spend output without sequence set.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.TxIn[0].Sequence = wire.MaxTxInSequenceNum
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
WitnessScript: commitScript,
|
|
Output: commitOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return CommitSpendToRemoteConfirmed(aliceSigner, signDesc,
|
|
sweepTx)
|
|
}),
|
|
false,
|
|
},
|
|
}
|
|
|
|
for i, testCase := range testCases {
|
|
sweepTx.TxIn[0].Witness = testCase.witness()
|
|
|
|
newEngine := func() (*txscript.Engine, error) {
|
|
return txscript.NewEngine(
|
|
commitPkScript, sweepTx, 0,
|
|
txscript.StandardVerifyFlags, nil, nil,
|
|
int64(outputVal),
|
|
txscript.NewCannedPrevOutputFetcher(
|
|
commitPkScript, int64(outputVal),
|
|
),
|
|
)
|
|
}
|
|
|
|
assertEngineExecution(t, i, testCase.valid, newEngine)
|
|
}
|
|
}
|
|
|
|
// TestLeaseCommitSpendToRemoteConfirmed checks that the delayed version of the
|
|
// to_remote version can only be spent by the owner, after one confirmation, and
|
|
// after the lease expiration has been met.
|
|
func TestLeaseCommitSpendToRemoteConfirmed(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
const (
|
|
outputVal = btcutil.Amount(2 * 10e8)
|
|
leaseExpiry = 1337
|
|
)
|
|
|
|
aliceKeyPriv, aliceKeyPub := btcec.PrivKeyFromBytes(
|
|
testWalletPrivKey,
|
|
)
|
|
|
|
txid, err := chainhash.NewHash(testHdSeed.CloneBytes())
|
|
require.NoError(t, err)
|
|
commitOut := &wire.OutPoint{
|
|
Hash: *txid,
|
|
Index: 0,
|
|
}
|
|
commitScript, err := LeaseCommitScriptToRemoteConfirmed(
|
|
aliceKeyPub, leaseExpiry,
|
|
)
|
|
require.NoError(t, err)
|
|
commitPkScript, err := WitnessScriptHash(commitScript)
|
|
require.NoError(t, err)
|
|
|
|
commitOutput := &wire.TxOut{
|
|
PkScript: commitPkScript,
|
|
Value: int64(outputVal),
|
|
}
|
|
|
|
sweepTx := wire.NewMsgTx(2)
|
|
sweepTx.AddTxIn(wire.NewTxIn(commitOut, nil, nil))
|
|
sweepTx.AddTxOut(
|
|
&wire.TxOut{
|
|
PkScript: []byte("doesn't matter"),
|
|
Value: 1 * 10e8,
|
|
},
|
|
)
|
|
|
|
aliceSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{aliceKeyPriv}}
|
|
|
|
testCases := []struct {
|
|
witness func() wire.TxWitness
|
|
valid bool
|
|
}{
|
|
{
|
|
// Alice can spend after the CSV delay and CLTV timelock
|
|
// has passed.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.LockTime = leaseExpiry
|
|
sweepTx.TxIn[0].Sequence = LockTimeToSequence(
|
|
false, 1,
|
|
)
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
WitnessScript: commitScript,
|
|
Output: commitOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return CommitSpendToRemoteConfirmed(
|
|
aliceSigner, signDesc, sweepTx,
|
|
)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// Alice cannot spend output without sequence set, even
|
|
// once the CLTV timelock has expired.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.LockTime = leaseExpiry
|
|
sweepTx.TxIn[0].Sequence = wire.MaxTxInSequenceNum
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
WitnessScript: commitScript,
|
|
Output: commitOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return CommitSpendToRemoteConfirmed(
|
|
aliceSigner, signDesc, sweepTx,
|
|
)
|
|
}),
|
|
false,
|
|
},
|
|
{
|
|
// Alice cannot spend output without sequence or
|
|
// locktime set.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.LockTime = 0
|
|
sweepTx.TxIn[0].Sequence = wire.MaxTxInSequenceNum
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
WitnessScript: commitScript,
|
|
Output: commitOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return CommitSpendToRemoteConfirmed(
|
|
aliceSigner, signDesc, sweepTx,
|
|
)
|
|
}),
|
|
false,
|
|
},
|
|
}
|
|
|
|
for i, testCase := range testCases {
|
|
sweepTx.TxIn[0].Witness = testCase.witness()
|
|
|
|
newEngine := func() (*txscript.Engine, error) {
|
|
return txscript.NewEngine(
|
|
commitPkScript, sweepTx, 0,
|
|
txscript.StandardVerifyFlags, nil, nil,
|
|
int64(outputVal),
|
|
txscript.NewCannedPrevOutputFetcher(
|
|
commitPkScript, int64(outputVal),
|
|
),
|
|
)
|
|
}
|
|
|
|
assertEngineExecution(t, i, testCase.valid, newEngine)
|
|
}
|
|
}
|
|
|
|
// TestSpendAnchor checks that we can spend the anchors using the various spend
|
|
// paths.
|
|
func TestSpendAnchor(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
const anchorSize = 294
|
|
|
|
// First we'll set up some initial key state for Alice.
|
|
aliceKeyPriv, aliceKeyPub := btcec.PrivKeyFromBytes(testWalletPrivKey)
|
|
|
|
// Create a fake anchor outpoint that we'll use to generate the
|
|
// sweeping transaction.
|
|
txid, err := chainhash.NewHash(testHdSeed.CloneBytes())
|
|
require.NoError(t, err, "unable to create txid")
|
|
anchorOutPoint := &wire.OutPoint{
|
|
Hash: *txid,
|
|
Index: 0,
|
|
}
|
|
|
|
sweepTx := wire.NewMsgTx(2)
|
|
sweepTx.AddTxIn(wire.NewTxIn(anchorOutPoint, nil, nil))
|
|
sweepTx.AddTxOut(
|
|
&wire.TxOut{
|
|
PkScript: []byte("doesn't matter"),
|
|
Value: 1 * 10e8,
|
|
},
|
|
)
|
|
|
|
// Generate the anchor script that can be spent by Alice immediately,
|
|
// or by anyone after 16 blocks.
|
|
anchorScript, err := CommitScriptAnchor(aliceKeyPub)
|
|
require.NoError(t, err, "unable to create htlc script")
|
|
anchorPkScript, err := WitnessScriptHash(anchorScript)
|
|
require.NoError(t, err, "unable to create htlc output")
|
|
|
|
anchorOutput := &wire.TxOut{
|
|
PkScript: anchorPkScript,
|
|
Value: int64(anchorSize),
|
|
}
|
|
|
|
// Create mock signer for Alice.
|
|
aliceSigner := &MockSigner{Privkeys: []*btcec.PrivateKey{aliceKeyPriv}}
|
|
|
|
testCases := []struct {
|
|
witness func() wire.TxWitness
|
|
valid bool
|
|
}{
|
|
{
|
|
// Alice can spend immediately.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.TxIn[0].Sequence = wire.MaxTxInSequenceNum
|
|
sweepTxSigHashes := NewTxSigHashesV0Only(sweepTx)
|
|
|
|
signDesc := &SignDescriptor{
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: aliceKeyPub,
|
|
},
|
|
WitnessScript: anchorScript,
|
|
Output: anchorOutput,
|
|
HashType: txscript.SigHashAll,
|
|
SigHashes: sweepTxSigHashes,
|
|
InputIndex: 0,
|
|
}
|
|
|
|
return CommitSpendAnchor(aliceSigner, signDesc,
|
|
sweepTx)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// Anyone can spend after 16 blocks.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.TxIn[0].Sequence = LockTimeToSequence(false, 16)
|
|
return CommitSpendAnchorAnyone(anchorScript)
|
|
}),
|
|
true,
|
|
},
|
|
{
|
|
// Anyone cannot spend before 16 blocks.
|
|
makeWitnessTestCase(t, func() (wire.TxWitness, error) {
|
|
sweepTx.TxIn[0].Sequence = LockTimeToSequence(false, 15)
|
|
return CommitSpendAnchorAnyone(anchorScript)
|
|
}),
|
|
false,
|
|
},
|
|
}
|
|
|
|
for i, testCase := range testCases {
|
|
sweepTx.TxIn[0].Witness = testCase.witness()
|
|
|
|
newEngine := func() (*txscript.Engine, error) {
|
|
return txscript.NewEngine(
|
|
anchorPkScript,
|
|
sweepTx, 0, txscript.StandardVerifyFlags, nil,
|
|
nil, int64(anchorSize),
|
|
txscript.NewCannedPrevOutputFetcher(
|
|
anchorPkScript, int64(anchorSize),
|
|
),
|
|
)
|
|
}
|
|
|
|
assertEngineExecution(t, i, testCase.valid, newEngine)
|
|
}
|
|
}
|
|
|
|
// TestSpecificationKeyDerivation implements the test vectors provided in
|
|
// BOLT-03, Appendix E.
|
|
func TestSpecificationKeyDerivation(t *testing.T) {
|
|
const (
|
|
baseSecretHex = "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f"
|
|
perCommitmentSecretHex = "1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100"
|
|
basePointHex = "036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2"
|
|
perCommitmentPointHex = "025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486"
|
|
)
|
|
|
|
baseSecret, err := privkeyFromHex(baseSecretHex)
|
|
require.NoError(t, err, "Failed to parse serialized privkey")
|
|
perCommitmentSecret, err := privkeyFromHex(perCommitmentSecretHex)
|
|
require.NoError(t, err, "Failed to parse serialized privkey")
|
|
basePoint, err := pubkeyFromHex(basePointHex)
|
|
require.NoError(t, err, "Failed to parse serialized pubkey")
|
|
perCommitmentPoint, err := pubkeyFromHex(perCommitmentPointHex)
|
|
require.NoError(t, err, "Failed to parse serialized pubkey")
|
|
|
|
// name: derivation of key from basepoint and per_commitment_point
|
|
const expectedLocalKeyHex = "0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5"
|
|
actualLocalKey := TweakPubKey(basePoint, perCommitmentPoint)
|
|
actualLocalKeyHex := pubkeyToHex(actualLocalKey)
|
|
if actualLocalKeyHex != expectedLocalKeyHex {
|
|
t.Errorf("Incorrect derivation of local public key: "+
|
|
"expected %v, got %v", expectedLocalKeyHex, actualLocalKeyHex)
|
|
}
|
|
|
|
// name: derivation of secret key from basepoint secret and per_commitment_secret
|
|
const expectedLocalPrivKeyHex = "cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f"
|
|
tweak := SingleTweakBytes(perCommitmentPoint, basePoint)
|
|
actualLocalPrivKey := TweakPrivKey(baseSecret, tweak)
|
|
actualLocalPrivKeyHex := privkeyToHex(actualLocalPrivKey)
|
|
if actualLocalPrivKeyHex != expectedLocalPrivKeyHex {
|
|
t.Errorf("Incorrect derivation of local private key: "+
|
|
"expected %v, got %v, %v", expectedLocalPrivKeyHex,
|
|
actualLocalPrivKeyHex, hex.EncodeToString(tweak))
|
|
}
|
|
|
|
// name: derivation of revocation key from basepoint and per_commitment_point
|
|
const expectedRevocationKeyHex = "02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0"
|
|
actualRevocationKey := DeriveRevocationPubkey(basePoint, perCommitmentPoint)
|
|
actualRevocationKeyHex := pubkeyToHex(actualRevocationKey)
|
|
if actualRevocationKeyHex != expectedRevocationKeyHex {
|
|
t.Errorf("Incorrect derivation of revocation public key: "+
|
|
"expected %v, got %v", expectedRevocationKeyHex,
|
|
actualRevocationKeyHex)
|
|
}
|
|
|
|
// name: derivation of revocation secret from basepoint_secret and per_commitment_secret
|
|
const expectedRevocationPrivKeyHex = "d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110"
|
|
actualRevocationPrivKey := DeriveRevocationPrivKey(baseSecret,
|
|
perCommitmentSecret)
|
|
actualRevocationPrivKeyHex := privkeyToHex(actualRevocationPrivKey)
|
|
if actualRevocationPrivKeyHex != expectedRevocationPrivKeyHex {
|
|
t.Errorf("Incorrect derivation of revocation private key: "+
|
|
"expected %v, got %v", expectedRevocationPrivKeyHex,
|
|
actualRevocationPrivKeyHex)
|
|
}
|
|
}
|