mirror of
https://github.com/lightningnetwork/lnd.git
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d30aae43e6
Similar to what we do for witnesses, check that the HTLC weight constants check out. They actually do not, since the spec is off by one. We ensure we agree with the spec.
1014 lines
23 KiB
Go
1014 lines
23 KiB
Go
package input_test
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import (
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"math/big"
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"testing"
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"github.com/btcsuite/btcd/blockchain"
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"github.com/btcsuite/btcd/btcec"
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"github.com/btcsuite/btcd/chaincfg"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/btcsuite/btcd/txscript"
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"github.com/btcsuite/btcd/wire"
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"github.com/btcsuite/btcutil"
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"github.com/stretchr/testify/require"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/input"
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"github.com/lightningnetwork/lnd/keychain"
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"github.com/lightningnetwork/lnd/lnwallet"
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)
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const (
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testCSVDelay = (1 << 31) - 1
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testCLTVExpiry = 500000000
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// maxDERSignatureSize is the largest possible DER-encoded signature
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// without the trailing sighash flag.
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maxDERSignatureSize = 72
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testAmt = btcutil.MaxSatoshi
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)
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var (
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testPubkeyBytes = make([]byte, 33)
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testHash160 = make([]byte, 20)
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testPreimage = make([]byte, 32)
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// testPubkey is a pubkey used in script size calculation.
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testPubkey = &btcec.PublicKey{
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X: &big.Int{},
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Y: &big.Int{},
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}
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testPrivkey, _ = btcec.PrivKeyFromBytes(btcec.S256(), make([]byte, 32))
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testTx = wire.NewMsgTx(2)
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testOutPoint = wire.OutPoint{
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Hash: chainhash.Hash{},
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Index: 1,
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}
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)
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// TestTxWeightEstimator tests that transaction weight estimates are calculated
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// correctly by comparing against an actual (though invalid) transaction
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// matching the template.
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func TestTxWeightEstimator(t *testing.T) {
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netParams := &chaincfg.MainNetParams
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p2pkhAddr, err := btcutil.NewAddressPubKeyHash(
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make([]byte, 20), netParams)
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if err != nil {
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t.Fatalf("Failed to generate address: %v", err)
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}
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p2pkhScript, err := txscript.PayToAddrScript(p2pkhAddr)
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if err != nil {
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t.Fatalf("Failed to generate scriptPubKey: %v", err)
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}
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p2wkhAddr, err := btcutil.NewAddressWitnessPubKeyHash(
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make([]byte, 20), netParams)
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if err != nil {
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t.Fatalf("Failed to generate address: %v", err)
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}
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p2wkhScript, err := txscript.PayToAddrScript(p2wkhAddr)
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if err != nil {
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t.Fatalf("Failed to generate scriptPubKey: %v", err)
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}
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p2wshAddr, err := btcutil.NewAddressWitnessScriptHash(
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make([]byte, 32), netParams)
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if err != nil {
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t.Fatalf("Failed to generate address: %v", err)
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}
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p2wshScript, err := txscript.PayToAddrScript(p2wshAddr)
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if err != nil {
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t.Fatalf("Failed to generate scriptPubKey: %v", err)
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}
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p2shAddr, err := btcutil.NewAddressScriptHash([]byte{0}, netParams)
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if err != nil {
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t.Fatalf("Failed to generate address: %v", err)
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}
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p2shScript, err := txscript.PayToAddrScript(p2shAddr)
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if err != nil {
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t.Fatalf("Failed to generate scriptPubKey: %v", err)
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}
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testCases := []struct {
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numP2PKHInputs int
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numP2WKHInputs int
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numP2WSHInputs int
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numNestedP2WKHInputs int
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numNestedP2WSHInputs int
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numP2PKHOutputs int
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numP2WKHOutputs int
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numP2WSHOutputs int
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numP2SHOutputs int
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}{
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// Assert base txn size.
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{},
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// Assert single input/output sizes.
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{
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numP2PKHInputs: 1,
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},
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{
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numP2WKHInputs: 1,
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},
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{
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numP2WSHInputs: 1,
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},
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{
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numNestedP2WKHInputs: 1,
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},
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{
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numNestedP2WSHInputs: 1,
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},
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{
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numP2WKHOutputs: 1,
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},
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{
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numP2PKHOutputs: 1,
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},
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{
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numP2WSHOutputs: 1,
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},
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{
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numP2SHOutputs: 1,
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},
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// Assert each input/output increments input/output counts.
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{
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numP2PKHInputs: 253,
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},
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{
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numP2WKHInputs: 253,
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},
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{
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numP2WSHInputs: 253,
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},
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{
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numNestedP2WKHInputs: 253,
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},
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{
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numNestedP2WSHInputs: 253,
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},
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{
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numP2WKHOutputs: 253,
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},
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{
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numP2PKHOutputs: 253,
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},
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{
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numP2WSHOutputs: 253,
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},
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{
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numP2SHOutputs: 253,
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},
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// Assert basic combinations of inputs and outputs.
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{
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numP2PKHInputs: 1,
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numP2PKHOutputs: 2,
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},
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{
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numP2PKHInputs: 1,
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numP2WKHInputs: 1,
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numP2WKHOutputs: 1,
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numP2WSHOutputs: 1,
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},
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{
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numP2WKHInputs: 1,
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numP2WKHOutputs: 1,
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numP2WSHOutputs: 1,
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},
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{
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numP2WKHInputs: 2,
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numP2WKHOutputs: 1,
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numP2WSHOutputs: 1,
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},
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{
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numP2WSHInputs: 1,
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numP2WKHOutputs: 1,
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},
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{
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numP2PKHInputs: 1,
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numP2SHOutputs: 1,
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},
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{
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numNestedP2WKHInputs: 1,
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numP2WKHOutputs: 1,
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},
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{
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numNestedP2WSHInputs: 1,
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numP2WKHOutputs: 1,
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},
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// Assert disparate input/output types increment total
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// input/output counts.
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{
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numP2PKHInputs: 50,
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numP2WKHInputs: 50,
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numP2WSHInputs: 51,
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numNestedP2WKHInputs: 51,
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numNestedP2WSHInputs: 51,
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numP2WKHOutputs: 1,
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},
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{
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numP2WKHInputs: 1,
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numP2WKHOutputs: 63,
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numP2PKHOutputs: 63,
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numP2WSHOutputs: 63,
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numP2SHOutputs: 64,
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},
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{
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numP2PKHInputs: 50,
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numP2WKHInputs: 50,
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numP2WSHInputs: 51,
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numNestedP2WKHInputs: 51,
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numNestedP2WSHInputs: 51,
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numP2WKHOutputs: 63,
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numP2PKHOutputs: 63,
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numP2WSHOutputs: 63,
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numP2SHOutputs: 64,
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},
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}
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for i, test := range testCases {
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var weightEstimate input.TxWeightEstimator
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tx := wire.NewMsgTx(1)
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for j := 0; j < test.numP2PKHInputs; j++ {
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weightEstimate.AddP2PKHInput()
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signature := make([]byte, maxDERSignatureSize+1)
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compressedPubKey := make([]byte, 33)
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scriptSig, err := txscript.NewScriptBuilder().AddData(signature).
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AddData(compressedPubKey).Script()
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if err != nil {
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t.Fatalf("Failed to generate scriptSig: %v", err)
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}
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tx.AddTxIn(&wire.TxIn{SignatureScript: scriptSig})
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}
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for j := 0; j < test.numP2WKHInputs; j++ {
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weightEstimate.AddP2WKHInput()
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signature := make([]byte, maxDERSignatureSize+1)
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compressedPubKey := make([]byte, 33)
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witness := wire.TxWitness{signature, compressedPubKey}
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tx.AddTxIn(&wire.TxIn{Witness: witness})
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}
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for j := 0; j < test.numP2WSHInputs; j++ {
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weightEstimate.AddWitnessInput(42)
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witnessScript := make([]byte, 40)
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witness := wire.TxWitness{witnessScript}
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tx.AddTxIn(&wire.TxIn{Witness: witness})
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}
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for j := 0; j < test.numNestedP2WKHInputs; j++ {
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weightEstimate.AddNestedP2WKHInput()
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signature := make([]byte, maxDERSignatureSize+1)
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compressedPubKey := make([]byte, 33)
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witness := wire.TxWitness{signature, compressedPubKey}
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scriptSig, err := txscript.NewScriptBuilder().AddData(p2wkhScript).
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Script()
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if err != nil {
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t.Fatalf("Failed to generate scriptSig: %v", err)
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}
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tx.AddTxIn(&wire.TxIn{SignatureScript: scriptSig, Witness: witness})
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}
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for j := 0; j < test.numNestedP2WSHInputs; j++ {
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weightEstimate.AddNestedP2WSHInput(42)
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witnessScript := make([]byte, 40)
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witness := wire.TxWitness{witnessScript}
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scriptSig, err := txscript.NewScriptBuilder().AddData(p2wshScript).
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Script()
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if err != nil {
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t.Fatalf("Failed to generate scriptSig: %v", err)
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}
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tx.AddTxIn(&wire.TxIn{SignatureScript: scriptSig, Witness: witness})
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}
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for j := 0; j < test.numP2PKHOutputs; j++ {
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weightEstimate.AddP2PKHOutput()
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tx.AddTxOut(&wire.TxOut{PkScript: p2pkhScript})
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}
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for j := 0; j < test.numP2WKHOutputs; j++ {
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weightEstimate.AddP2WKHOutput()
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tx.AddTxOut(&wire.TxOut{PkScript: p2wkhScript})
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}
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for j := 0; j < test.numP2WSHOutputs; j++ {
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weightEstimate.AddP2WSHOutput()
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tx.AddTxOut(&wire.TxOut{PkScript: p2wshScript})
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}
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for j := 0; j < test.numP2SHOutputs; j++ {
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weightEstimate.AddP2SHOutput()
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tx.AddTxOut(&wire.TxOut{PkScript: p2shScript})
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}
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expectedWeight := blockchain.GetTransactionWeight(btcutil.NewTx(tx))
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if weightEstimate.Weight() != int(expectedWeight) {
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t.Errorf("Case %d: Got wrong weight: expected %d, got %d",
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i, expectedWeight, weightEstimate.Weight())
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}
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}
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}
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type maxDERSignature struct{}
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func (s *maxDERSignature) Serialize() []byte {
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// Always return worst-case signature length, excluding the one byte
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// sighash flag.
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return make([]byte, maxDERSignatureSize)
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}
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func (s *maxDERSignature) Verify(_ []byte, _ *btcec.PublicKey) bool {
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return true
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}
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// dummySigner is a fake signer used for size (upper bound) calculations.
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type dummySigner struct {
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input.Signer
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}
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// SignOutputRaw generates a signature for the passed transaction according to
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// the data within the passed SignDescriptor.
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func (s *dummySigner) SignOutputRaw(tx *wire.MsgTx,
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signDesc *input.SignDescriptor) (input.Signature, error) {
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return &maxDERSignature{}, nil
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}
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type witnessSizeTest struct {
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name string
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expSize int
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genWitness func(t *testing.T) wire.TxWitness
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}
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var witnessSizeTests = []witnessSizeTest{
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{
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name: "funding",
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expSize: input.MultiSigWitnessSize,
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genWitness: func(t *testing.T) wire.TxWitness {
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witnessScript, _, err := input.GenFundingPkScript(
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testPubkeyBytes, testPubkeyBytes, 1,
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)
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if err != nil {
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t.Fatal(err)
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}
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return input.SpendMultiSig(
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witnessScript,
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testPubkeyBytes, &maxDERSignature{},
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testPubkeyBytes, &maxDERSignature{},
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)
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},
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},
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{
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name: "to local timeout",
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expSize: input.ToLocalTimeoutWitnessSize,
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genWitness: func(t *testing.T) wire.TxWitness {
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witnessScript, err := input.CommitScriptToSelf(
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testCSVDelay, testPubkey, testPubkey,
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)
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if err != nil {
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t.Fatal(err)
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}
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signDesc := &input.SignDescriptor{
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WitnessScript: witnessScript,
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}
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witness, err := input.CommitSpendTimeout(
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&dummySigner{}, signDesc, testTx,
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)
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if err != nil {
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t.Fatal(err)
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}
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return witness
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},
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},
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{
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name: "to local revoke",
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expSize: input.ToLocalPenaltyWitnessSize,
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genWitness: func(t *testing.T) wire.TxWitness {
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witnessScript, err := input.CommitScriptToSelf(
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testCSVDelay, testPubkey, testPubkey,
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)
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if err != nil {
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t.Fatal(err)
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}
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signDesc := &input.SignDescriptor{
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WitnessScript: witnessScript,
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}
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witness, err := input.CommitSpendRevoke(
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&dummySigner{}, signDesc, testTx,
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)
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if err != nil {
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t.Fatal(err)
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}
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return witness
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},
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},
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{
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name: "to remote confirmed",
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expSize: input.ToRemoteConfirmedWitnessSize,
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genWitness: func(t *testing.T) wire.TxWitness {
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witScript, err := input.CommitScriptToRemoteConfirmed(
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testPubkey,
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)
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if err != nil {
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t.Fatal(err)
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}
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signDesc := &input.SignDescriptor{
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WitnessScript: witScript,
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KeyDesc: keychain.KeyDescriptor{
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PubKey: testPubkey,
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},
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}
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witness, err := input.CommitSpendToRemoteConfirmed(
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&dummySigner{}, signDesc, testTx,
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)
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if err != nil {
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t.Fatal(err)
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}
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return witness
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},
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},
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{
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name: "anchor",
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expSize: input.AnchorWitnessSize,
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genWitness: func(t *testing.T) wire.TxWitness {
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witScript, err := input.CommitScriptAnchor(
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testPubkey,
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)
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if err != nil {
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t.Fatal(err)
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}
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signDesc := &input.SignDescriptor{
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WitnessScript: witScript,
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KeyDesc: keychain.KeyDescriptor{
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PubKey: testPubkey,
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},
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}
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witness, err := input.CommitSpendAnchor(
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&dummySigner{}, signDesc, testTx,
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)
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if err != nil {
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t.Fatal(err)
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}
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return witness
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},
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},
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|
{
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name: "anchor anyone",
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expSize: 43,
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genWitness: func(t *testing.T) wire.TxWitness {
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witScript, err := input.CommitScriptAnchor(
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testPubkey,
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)
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if err != nil {
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t.Fatal(err)
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|
}
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witness, _ := input.CommitSpendAnchorAnyone(witScript)
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return witness
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},
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},
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{
|
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name: "offered htlc revoke",
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expSize: input.OfferedHtlcPenaltyWitnessSize,
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genWitness: func(t *testing.T) wire.TxWitness {
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witScript, err := input.SenderHTLCScript(
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testPubkey, testPubkey, testPubkey,
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testHash160, false,
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)
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|
if err != nil {
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t.Fatal(err)
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|
}
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signDesc := &input.SignDescriptor{
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WitnessScript: witScript,
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KeyDesc: keychain.KeyDescriptor{
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PubKey: testPubkey,
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},
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DoubleTweak: testPrivkey,
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|
}
|
|
|
|
witness, err := input.SenderHtlcSpendRevoke(
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&dummySigner{}, signDesc, testTx,
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)
|
|
if err != nil {
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t.Fatal(err)
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|
}
|
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|
|
return witness
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},
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},
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|
{
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|
name: "offered htlc revoke confirmed",
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expSize: input.OfferedHtlcPenaltyWitnessSizeConfirmed,
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genWitness: func(t *testing.T) wire.TxWitness {
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|
hash := make([]byte, 20)
|
|
|
|
witScript, err := input.SenderHTLCScript(
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testPubkey, testPubkey, testPubkey,
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hash, true,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
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|
}
|
|
|
|
signDesc := &input.SignDescriptor{
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WitnessScript: witScript,
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KeyDesc: keychain.KeyDescriptor{
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PubKey: testPubkey,
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},
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DoubleTweak: testPrivkey,
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}
|
|
|
|
witness, err := input.SenderHtlcSpendRevoke(
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&dummySigner{}, signDesc, testTx,
|
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)
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if err != nil {
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t.Fatal(err)
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|
}
|
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|
|
return witness
|
|
},
|
|
},
|
|
{
|
|
name: "offered htlc timeout",
|
|
expSize: input.OfferedHtlcTimeoutWitnessSize,
|
|
genWitness: func(t *testing.T) wire.TxWitness {
|
|
witScript, err := input.SenderHTLCScript(
|
|
testPubkey, testPubkey, testPubkey,
|
|
testHash160, false,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
}
|
|
|
|
witness, err := input.SenderHtlcSpendTimeout(
|
|
&maxDERSignature{}, txscript.SigHashAll,
|
|
&dummySigner{}, signDesc, testTx,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
return witness
|
|
},
|
|
},
|
|
{
|
|
name: "offered htlc timeout confirmed",
|
|
expSize: input.OfferedHtlcTimeoutWitnessSizeConfirmed,
|
|
genWitness: func(t *testing.T) wire.TxWitness {
|
|
witScript, err := input.SenderHTLCScript(
|
|
testPubkey, testPubkey, testPubkey,
|
|
testHash160, true,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
}
|
|
|
|
witness, err := input.SenderHtlcSpendTimeout(
|
|
&maxDERSignature{}, txscript.SigHashAll,
|
|
&dummySigner{}, signDesc, testTx,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
return witness
|
|
},
|
|
},
|
|
{
|
|
name: "offered htlc success",
|
|
expSize: input.OfferedHtlcSuccessWitnessSize,
|
|
genWitness: func(t *testing.T) wire.TxWitness {
|
|
witScript, err := input.SenderHTLCScript(
|
|
testPubkey, testPubkey, testPubkey,
|
|
testHash160, false,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
}
|
|
|
|
witness, err := input.SenderHtlcSpendRedeem(
|
|
&dummySigner{}, signDesc, testTx, testPreimage,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
return witness
|
|
},
|
|
},
|
|
{
|
|
name: "offered htlc success confirmed",
|
|
expSize: input.OfferedHtlcSuccessWitnessSizeConfirmed,
|
|
genWitness: func(t *testing.T) wire.TxWitness {
|
|
witScript, err := input.SenderHTLCScript(
|
|
testPubkey, testPubkey, testPubkey,
|
|
testHash160, true,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
}
|
|
|
|
witness, err := input.SenderHtlcSpendRedeem(
|
|
&dummySigner{}, signDesc, testTx, testPreimage,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
return witness
|
|
},
|
|
},
|
|
{
|
|
name: "accepted htlc revoke",
|
|
expSize: input.AcceptedHtlcPenaltyWitnessSize,
|
|
genWitness: func(t *testing.T) wire.TxWitness {
|
|
witScript, err := input.ReceiverHTLCScript(
|
|
testCLTVExpiry, testPubkey, testPubkey,
|
|
testPubkey, testHash160, false,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: testPubkey,
|
|
},
|
|
DoubleTweak: testPrivkey,
|
|
}
|
|
|
|
witness, err := input.ReceiverHtlcSpendRevoke(
|
|
&dummySigner{}, signDesc, testTx,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
return witness
|
|
},
|
|
},
|
|
{
|
|
name: "accepted htlc revoke confirmed",
|
|
expSize: input.AcceptedHtlcPenaltyWitnessSizeConfirmed,
|
|
genWitness: func(t *testing.T) wire.TxWitness {
|
|
witScript, err := input.ReceiverHTLCScript(
|
|
testCLTVExpiry, testPubkey, testPubkey,
|
|
testPubkey, testHash160, true,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: testPubkey,
|
|
},
|
|
DoubleTweak: testPrivkey,
|
|
}
|
|
|
|
witness, err := input.ReceiverHtlcSpendRevoke(
|
|
&dummySigner{}, signDesc, testTx,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
return witness
|
|
},
|
|
},
|
|
{
|
|
name: "accepted htlc timeout",
|
|
expSize: input.AcceptedHtlcTimeoutWitnessSize,
|
|
genWitness: func(t *testing.T) wire.TxWitness {
|
|
|
|
witScript, err := input.ReceiverHTLCScript(
|
|
testCLTVExpiry, testPubkey, testPubkey,
|
|
testPubkey, testHash160, false,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
}
|
|
|
|
witness, err := input.ReceiverHtlcSpendTimeout(
|
|
&dummySigner{}, signDesc, testTx,
|
|
testCLTVExpiry,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
return witness
|
|
},
|
|
},
|
|
{
|
|
name: "accepted htlc timeout confirmed",
|
|
expSize: input.AcceptedHtlcTimeoutWitnessSizeConfirmed,
|
|
genWitness: func(t *testing.T) wire.TxWitness {
|
|
witScript, err := input.ReceiverHTLCScript(
|
|
testCLTVExpiry, testPubkey, testPubkey,
|
|
testPubkey, testHash160, true,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
}
|
|
|
|
witness, err := input.ReceiverHtlcSpendTimeout(
|
|
&dummySigner{}, signDesc, testTx,
|
|
testCLTVExpiry,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
return witness
|
|
},
|
|
},
|
|
{
|
|
name: "accepted htlc success",
|
|
expSize: input.AcceptedHtlcSuccessWitnessSize,
|
|
genWitness: func(t *testing.T) wire.TxWitness {
|
|
witScript, err := input.ReceiverHTLCScript(
|
|
testCLTVExpiry, testPubkey, testPubkey,
|
|
testPubkey, testHash160, false,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: testPubkey,
|
|
},
|
|
}
|
|
|
|
witness, err := input.ReceiverHtlcSpendRedeem(
|
|
&maxDERSignature{}, txscript.SigHashAll,
|
|
testPreimage, &dummySigner{}, signDesc, testTx,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
return witness
|
|
},
|
|
},
|
|
{
|
|
name: "accepted htlc success confirmed",
|
|
expSize: input.AcceptedHtlcSuccessWitnessSizeConfirmed,
|
|
genWitness: func(t *testing.T) wire.TxWitness {
|
|
witScript, err := input.ReceiverHTLCScript(
|
|
testCLTVExpiry, testPubkey, testPubkey,
|
|
testPubkey, testHash160, true,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: testPubkey,
|
|
},
|
|
}
|
|
|
|
witness, err := input.ReceiverHtlcSpendRedeem(
|
|
&maxDERSignature{}, txscript.SigHashAll,
|
|
testPreimage, &dummySigner{}, signDesc, testTx,
|
|
)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
return witness
|
|
},
|
|
},
|
|
}
|
|
|
|
// TestWitnessSizes asserts the correctness of our magic witness constants.
|
|
// Witnesses involving signatures will have maxDERSignatures injected so that we
|
|
// can determine upper bounds for the witness sizes. These constants are
|
|
// predominately used for fee estimation, so we want to be certain that we
|
|
// aren't under estimating or our transactions could get stuck.
|
|
func TestWitnessSizes(t *testing.T) {
|
|
for _, test := range witnessSizeTests {
|
|
test := test
|
|
t.Run(test.name, func(t *testing.T) {
|
|
size := test.genWitness(t).SerializeSize()
|
|
if size != test.expSize {
|
|
t.Fatalf("size mismatch, want: %v, got: %v",
|
|
test.expSize, size)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
// genTimeoutTx creates a signed HTLC second level timeout tx.
|
|
func genTimeoutTx(chanType channeldb.ChannelType) (*wire.MsgTx, error) {
|
|
// Create the unsigned timeout tx.
|
|
timeoutTx, err := lnwallet.CreateHtlcTimeoutTx(
|
|
chanType, testOutPoint, testAmt, testCLTVExpiry,
|
|
testCSVDelay, testPubkey, testPubkey,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// In order to sign the transcation, generate the script for the output
|
|
// it spends.
|
|
witScript, err := input.SenderHTLCScript(
|
|
testPubkey, testPubkey, testPubkey, testHash160,
|
|
chanType.HasAnchors(),
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: testPubkey,
|
|
},
|
|
}
|
|
|
|
// Sign the timeout tx and add the witness.
|
|
sigHashType := lnwallet.HtlcSigHashType(chanType)
|
|
timeoutWitness, err := input.SenderHtlcSpendTimeout(
|
|
&maxDERSignature{}, sigHashType, &dummySigner{},
|
|
signDesc, timeoutTx,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
timeoutTx.TxIn[0].Witness = timeoutWitness
|
|
|
|
return timeoutTx, nil
|
|
}
|
|
|
|
// genSuccessTx creates a signed HTLC second level success tx.
|
|
func genSuccessTx(chanType channeldb.ChannelType) (*wire.MsgTx, error) {
|
|
// Create the unisgned success tx.
|
|
successTx, err := lnwallet.CreateHtlcSuccessTx(
|
|
chanType, testOutPoint, testAmt, testCSVDelay,
|
|
testPubkey, testPubkey,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// In order to sign the transcation, generate the script for the output
|
|
// it spends.
|
|
witScript, err := input.ReceiverHTLCScript(
|
|
testCLTVExpiry, testPubkey, testPubkey,
|
|
testPubkey, testHash160, chanType.HasAnchors(),
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
signDesc := &input.SignDescriptor{
|
|
WitnessScript: witScript,
|
|
KeyDesc: keychain.KeyDescriptor{
|
|
PubKey: testPubkey,
|
|
},
|
|
}
|
|
|
|
// Sign the success tx and add the witness.
|
|
sigHashType := lnwallet.HtlcSigHashType(channeldb.SingleFunderBit)
|
|
successWitness, err := input.ReceiverHtlcSpendRedeem(
|
|
&maxDERSignature{}, sigHashType, testPreimage,
|
|
&dummySigner{}, signDesc, successTx,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
successTx.TxIn[0].Witness = successWitness
|
|
|
|
return successTx, nil
|
|
|
|
}
|
|
|
|
type txSizeTest struct {
|
|
name string
|
|
expWeight int64
|
|
genTx func(t *testing.T) *wire.MsgTx
|
|
}
|
|
|
|
var txSizeTests = []txSizeTest{
|
|
{
|
|
name: "htlc timeout regular ",
|
|
expWeight: input.HtlcTimeoutWeight,
|
|
genTx: func(t *testing.T) *wire.MsgTx {
|
|
tx, err := genTimeoutTx(channeldb.SingleFunderBit)
|
|
require.NoError(t, err)
|
|
|
|
return tx
|
|
},
|
|
},
|
|
{
|
|
name: "htlc timeout confirmed",
|
|
expWeight: input.HtlcTimeoutWeightConfirmed,
|
|
genTx: func(t *testing.T) *wire.MsgTx {
|
|
tx, err := genTimeoutTx(channeldb.AnchorOutputsBit)
|
|
require.NoError(t, err)
|
|
|
|
return tx
|
|
},
|
|
},
|
|
|
|
{
|
|
name: "htlc success regular",
|
|
// The weight estimate from the spec is off by one, but it's
|
|
// okay since we overestimate the weight.
|
|
expWeight: input.HtlcSuccessWeight - 1,
|
|
genTx: func(t *testing.T) *wire.MsgTx {
|
|
tx, err := genSuccessTx(channeldb.SingleFunderBit)
|
|
require.NoError(t, err)
|
|
|
|
return tx
|
|
},
|
|
},
|
|
{
|
|
name: "htlc success confirmed",
|
|
// The weight estimate from the spec is off by one, but it's
|
|
// okay since we overestimate the weight.
|
|
expWeight: input.HtlcSuccessWeightConfirmed - 1,
|
|
genTx: func(t *testing.T) *wire.MsgTx {
|
|
tx, err := genSuccessTx(channeldb.AnchorOutputsBit)
|
|
require.NoError(t, err)
|
|
|
|
return tx
|
|
},
|
|
},
|
|
}
|
|
|
|
// TestWitnessSizes asserts the correctness of our magic tx size constants.
|
|
func TestTxSizes(t *testing.T) {
|
|
for _, test := range txSizeTests {
|
|
test := test
|
|
t.Run(test.name, func(t *testing.T) {
|
|
tx := test.genTx(t)
|
|
|
|
weight := blockchain.GetTransactionWeight(btcutil.NewTx(tx))
|
|
if weight != test.expWeight {
|
|
t.Fatalf("size mismatch, want: %v, got: %v",
|
|
test.expWeight, weight)
|
|
}
|
|
})
|
|
}
|
|
}
|