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itest: move helper functions into one file

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This commit creates the file utils.go to hold the commonly used
functions for tests.
This commit is contained in:
yyforyongyu 2021-06-29 04:45:37 +08:00
parent 27b9273e2f
commit 73a2211205
No known key found for this signature in database
GPG Key ID: 9BCD95C4FF296868
3 changed files with 495 additions and 476 deletions
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12
lntest/itest/lnd_channel_backup_test.go
View File

@ -1251,3 +1251,15 @@ func copyPorts(oldNode *lntest.HarnessNode) lntest.NodeOption {
cfg.ProfilePort = oldNode.Cfg.ProfilePort
}
}
func rpcPointToWirePoint(t *harnessTest, chanPoint *lnrpc.ChannelPoint) wire.OutPoint {
txid, err := lnrpc.GetChanPointFundingTxid(chanPoint)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
return wire.OutPoint{
Hash: *txid,
Index: chanPoint.OutputIndex,
}
}

476
lntest/itest/lnd_test.go
View File

@ -6,7 +6,6 @@ import (
"crypto/rand"
"flag"
"fmt"
"io"
"io/ioutil"
"os"
"strings"
@ -20,10 +19,8 @@ import (
"github.com/btcsuite/btcutil"
"github.com/btcsuite/btcwallet/wallet"
"github.com/davecgh/go-spew/spew"
"github.com/go-errors/errors"
"github.com/lightningnetwork/lnd/chainreg"
"github.com/lightningnetwork/lnd/funding"
"github.com/lightningnetwork/lnd/input"
"github.com/lightningnetwork/lnd/lncfg"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lnrpc/routerrpc"
@ -31,7 +28,6 @@ import (
"github.com/lightningnetwork/lnd/lntest"
"github.com/lightningnetwork/lnd/lntest/wait"
"github.com/lightningnetwork/lnd/lnwallet"
"github.com/lightningnetwork/lnd/lnwallet/chainfee"
"github.com/lightningnetwork/lnd/lnwire"
"github.com/stretchr/testify/require"
)
@ -102,343 +98,6 @@ func getTestCaseSplitTranche() ([]*testCase, uint, uint) {
return allTestCases[trancheOffset:trancheEnd], threadID, trancheOffset
}
func rpcPointToWirePoint(t *harnessTest, chanPoint *lnrpc.ChannelPoint) wire.OutPoint {
txid, err := lnrpc.GetChanPointFundingTxid(chanPoint)
if err != nil {
t.Fatalf("unable to get txid: %v", err)
}
return wire.OutPoint{
Hash: *txid,
Index: chanPoint.OutputIndex,
}
}
// completePaymentRequests sends payments from a lightning node to complete all
// payment requests. If the awaitResponse parameter is true, this function
// does not return until all payments successfully complete without errors.
func completePaymentRequests(ctx context.Context, client lnrpc.LightningClient,
routerClient routerrpc.RouterClient, paymentRequests []string,
awaitResponse bool) error {
// We start by getting the current state of the client's channels. This
// is needed to ensure the payments actually have been committed before
// we return.
ctxt, _ := context.WithTimeout(ctx, defaultTimeout)
req := &lnrpc.ListChannelsRequest{}
listResp, err := client.ListChannels(ctxt, req)
if err != nil {
return err
}
// send sends a payment and returns an error if it doesn't succeeded.
send := func(payReq string) error {
ctxc, cancel := context.WithCancel(ctx)
defer cancel()
payStream, err := routerClient.SendPaymentV2(
ctxc,
&routerrpc.SendPaymentRequest{
PaymentRequest: payReq,
TimeoutSeconds: 60,
FeeLimitMsat: noFeeLimitMsat,
},
)
if err != nil {
return err
}
resp, err := getPaymentResult(payStream)
if err != nil {
return err
}
if resp.Status != lnrpc.Payment_SUCCEEDED {
return errors.New(resp.FailureReason)
}
return nil
}
// Launch all payments simultaneously.
results := make(chan error)
for _, payReq := range paymentRequests {
payReqCopy := payReq
go func() {
err := send(payReqCopy)
if awaitResponse {
results <- err
}
}()
}
// If awaiting a response, verify that all payments succeeded.
if awaitResponse {
for range paymentRequests {
err := <-results
if err != nil {
return err
}
}
return nil
}
// We are not waiting for feedback in the form of a response, but we
// should still wait long enough for the server to receive and handle
// the send before cancelling the request. We wait for the number of
// updates to one of our channels has increased before we return.
err = wait.Predicate(func() bool {
ctxt, _ = context.WithTimeout(ctx, defaultTimeout)
newListResp, err := client.ListChannels(ctxt, req)
if err != nil {
return false
}
// If the number of open channels is now lower than before
// attempting the payments, it means one of the payments
// triggered a force closure (for example, due to an incorrect
// preimage). Return early since it's clear the payment was
// attempted.
if len(newListResp.Channels) < len(listResp.Channels) {
return true
}
for _, c1 := range listResp.Channels {
for _, c2 := range newListResp.Channels {
if c1.ChannelPoint != c2.ChannelPoint {
continue
}
// If this channel has an increased numbr of
// updates, we assume the payments are
// committed, and we can return.
if c2.NumUpdates > c1.NumUpdates {
return true
}
}
}
return false
}, defaultTimeout)
if err != nil {
return err
}
return nil
}
// makeFakePayHash creates random pre image hash
func makeFakePayHash(t *harnessTest) []byte {
randBuf := make([]byte, 32)
if _, err := rand.Read(randBuf); err != nil {
t.Fatalf("internal error, cannot generate random string: %v", err)
}
return randBuf
}
// createPayReqs is a helper method that will create a slice of payment
// requests for the given node.
func createPayReqs(node *lntest.HarnessNode, paymentAmt btcutil.Amount,
numInvoices int) ([]string, [][]byte, []*lnrpc.Invoice, error) {
payReqs := make([]string, numInvoices)
rHashes := make([][]byte, numInvoices)
invoices := make([]*lnrpc.Invoice, numInvoices)
for i := 0; i < numInvoices; i++ {
preimage := make([]byte, 32)
_, err := rand.Read(preimage)
if err != nil {
return nil, nil, nil, fmt.Errorf("unable to generate "+
"preimage: %v", err)
}
invoice := &lnrpc.Invoice{
Memo: "testing",
RPreimage: preimage,
Value: int64(paymentAmt),
}
ctxt, _ := context.WithTimeout(
context.Background(), defaultTimeout,
)
resp, err := node.AddInvoice(ctxt, invoice)
if err != nil {
return nil, nil, nil, fmt.Errorf("unable to add "+
"invoice: %v", err)
}
// Set the payment address in the invoice so the caller can
// properly use it.
invoice.PaymentAddr = resp.PaymentAddr
payReqs[i] = resp.PaymentRequest
rHashes[i] = resp.RHash
invoices[i] = invoice
}
return payReqs, rHashes, invoices, nil
}
// getChanInfo is a helper method for getting channel info for a node's sole
// channel.
func getChanInfo(ctx context.Context, node *lntest.HarnessNode) (
*lnrpc.Channel, error) {
req := &lnrpc.ListChannelsRequest{}
channelInfo, err := node.ListChannels(ctx, req)
if err != nil {
return nil, err
}
if len(channelInfo.Channels) != 1 {
return nil, fmt.Errorf("node should only have a single "+
"channel, instead it has %v", len(channelInfo.Channels))
}
return channelInfo.Channels[0], nil
}
// commitType is a simple enum used to run though the basic funding flow with
// different commitment formats.
type commitType byte
const (
// commitTypeLegacy is the old school commitment type.
commitTypeLegacy commitType = iota
// commiTypeTweakless is the commitment type where the remote key is
// static (non-tweaked).
commitTypeTweakless
// commitTypeAnchors is the kind of commitment that has extra outputs
// used for anchoring down to commitment using CPFP.
commitTypeAnchors
)
// String returns that name of the commitment type.
func (c commitType) String() string {
switch c {
case commitTypeLegacy:
return "legacy"
case commitTypeTweakless:
return "tweakless"
case commitTypeAnchors:
return "anchors"
default:
return "invalid"
}
}
// Args returns the command line flag to supply to enable this commitment type.
func (c commitType) Args() []string {
switch c {
case commitTypeLegacy:
return []string{"--protocol.legacy.committweak"}
case commitTypeTweakless:
return []string{}
case commitTypeAnchors:
return []string{"--protocol.anchors"}
}
return nil
}
// calcStaticFee calculates appropriate fees for commitment transactions. This
// function provides a simple way to allow test balance assertions to take fee
// calculations into account.
func (c commitType) calcStaticFee(numHTLCs int) btcutil.Amount {
const htlcWeight = input.HTLCWeight
var (
feePerKw = chainfee.SatPerKVByte(50000).FeePerKWeight()
commitWeight = input.CommitWeight
anchors = btcutil.Amount(0)
)
// The anchor commitment type is slightly heavier, and we must also add
// the value of the two anchors to the resulting fee the initiator
// pays. In addition the fee rate is capped at 10 sat/vbyte for anchor
// channels.
if c == commitTypeAnchors {
feePerKw = chainfee.SatPerKVByte(
lnwallet.DefaultAnchorsCommitMaxFeeRateSatPerVByte * 1000,
).FeePerKWeight()
commitWeight = input.AnchorCommitWeight
anchors = 2 * anchorSize
}
return feePerKw.FeeForWeight(int64(commitWeight+htlcWeight*numHTLCs)) +
anchors
}
// channelCommitType retrieves the active channel commitment type for the given
// chan point.
func channelCommitType(node *lntest.HarnessNode,
chanPoint *lnrpc.ChannelPoint) (commitType, error) {
ctxb := context.Background()
ctxt, _ := context.WithTimeout(ctxb, defaultTimeout)
req := &lnrpc.ListChannelsRequest{}
channels, err := node.ListChannels(ctxt, req)
if err != nil {
return 0, fmt.Errorf("listchannels failed: %v", err)
}
for _, c := range channels.Channels {
if c.ChannelPoint == txStr(chanPoint) {
switch c.CommitmentType {
// If the anchor output size is non-zero, we are
// dealing with the anchor type.
case lnrpc.CommitmentType_ANCHORS:
return commitTypeAnchors, nil
// StaticRemoteKey means it is tweakless,
case lnrpc.CommitmentType_STATIC_REMOTE_KEY:
return commitTypeTweakless, nil
// Otherwise legacy.
default:
return commitTypeLegacy, nil
}
}
}
return 0, fmt.Errorf("channel point %v not found", chanPoint)
}
// calculateMaxHtlc re-implements the RequiredRemoteChannelReserve of the
// funding manager's config, which corresponds to the maximum MaxHTLC value we
// allow users to set when updating a channel policy.
func calculateMaxHtlc(chanCap btcutil.Amount) uint64 {
reserve := lnwire.NewMSatFromSatoshis(chanCap / 100)
max := lnwire.NewMSatFromSatoshis(chanCap) - reserve
return uint64(max)
}
// waitForNodeBlockHeight queries the node for its current block height until
// it reaches the passed height.
func waitForNodeBlockHeight(ctx context.Context, node *lntest.HarnessNode,
height int32) error {
var predErr error
err := wait.Predicate(func() bool {
ctxt, _ := context.WithTimeout(ctx, defaultTimeout)
info, err := node.GetInfo(ctxt, &lnrpc.GetInfoRequest{})
if err != nil {
predErr = err
return false
}
if int32(info.BlockHeight) != height {
predErr = fmt.Errorf("expected block height to "+
"be %v, was %v", height, info.BlockHeight)
return false
}
return true
}, defaultTimeout)
if err != nil {
return predErr
}
return nil
}
// testDisconnectingTargetPeer performs a test which disconnects Alice-peer from
// Bob-peer and then re-connects them again. We expect Alice to be able to
// disconnect at any point.
@ -589,29 +248,6 @@ func testDisconnectingTargetPeer(net *lntest.NetworkHarness, t *harnessTest) {
cleanupForceClose(t, net, alice, chanPoint)
}
// findTxAtHeight gets all of the transactions that a node's wallet has a record
// of at the target height, and finds and returns the tx with the target txid,
// failing if it is not found.
func findTxAtHeight(ctx context.Context, t *harnessTest, height int32,
target string, node *lntest.HarnessNode) *lnrpc.Transaction {
txns, err := node.LightningClient.GetTransactions(
ctx, &lnrpc.GetTransactionsRequest{
StartHeight: height,
EndHeight: height,
},
)
require.NoError(t.t, err, "could not get transactions")
for _, tx := range txns.Transactions {
if tx.TxHash == target {
return tx
}
}
return nil
}
// testSphinxReplayPersistence verifies that replayed onion packets are rejected
// by a remote peer after a restart. We use a combination of unsafe
// configuration arguments to force Carol to replay the same sphinx packet after
@ -933,75 +569,6 @@ func testListChannels(net *lntest.NetworkHarness, t *harnessTest) {
}
// channelSubscription houses the proxied update and error chans for a node's
// channel subscriptions.
type channelSubscription struct {
updateChan chan *lnrpc.ChannelEventUpdate
errChan chan error
quit chan struct{}
}
// subscribeChannelNotifications subscribes to channel updates and launches a
// goroutine that forwards these to the returned channel.
func subscribeChannelNotifications(ctxb context.Context, t *harnessTest,
node *lntest.HarnessNode) channelSubscription {
// We'll first start by establishing a notification client which will
// send us notifications upon channels becoming active, inactive or
// closed.
req := &lnrpc.ChannelEventSubscription{}
ctx, cancelFunc := context.WithCancel(ctxb)
chanUpdateClient, err := node.SubscribeChannelEvents(ctx, req)
if err != nil {
t.Fatalf("unable to create channel update client: %v", err)
}
// We'll launch a goroutine that will be responsible for proxying all
// notifications recv'd from the client into the channel below.
errChan := make(chan error, 1)
quit := make(chan struct{})
chanUpdates := make(chan *lnrpc.ChannelEventUpdate, 20)
go func() {
defer cancelFunc()
for {
select {
case <-quit:
return
default:
chanUpdate, err := chanUpdateClient.Recv()
select {
case <-quit:
return
default:
}
if err == io.EOF {
return
} else if err != nil {
select {
case errChan <- err:
case <-quit:
}
return
}
select {
case chanUpdates <- chanUpdate:
case <-quit:
return
}
}
}
}()
return channelSubscription{
updateChan: chanUpdates,
errChan: errChan,
quit: quit,
}
}
// testMaxPendingChannels checks that error is returned from remote peer if
// max pending channel number was exceeded and that '--maxpendingchannels' flag
// exists and works properly.
@ -1114,49 +681,6 @@ func testMaxPendingChannels(net *lntest.NetworkHarness, t *harnessTest) {
}
}
// getNTxsFromMempool polls until finding the desired number of transactions in
// the provided miner's mempool and returns the full transactions to the caller.
func getNTxsFromMempool(miner *rpcclient.Client, n int,
timeout time.Duration) ([]*wire.MsgTx, error) {
txids, err := waitForNTxsInMempool(miner, n, timeout)
if err != nil {
return nil, err
}
var txes []*wire.MsgTx
for _, txid := range txids {
tx, err := miner.GetRawTransaction(txid)
if err != nil {
return nil, err
}
txes = append(txes, tx.MsgTx())
}
return txes, nil
}
// getTxFee retrieves parent transactions and reconstructs the fee paid.
func getTxFee(miner *rpcclient.Client, tx *wire.MsgTx) (btcutil.Amount, error) {
var balance btcutil.Amount
for _, in := range tx.TxIn {
parentHash := in.PreviousOutPoint.Hash
rawTx, err := miner.GetRawTransaction(&parentHash)
if err != nil {
return 0, err
}
parent := rawTx.MsgTx()
balance += btcutil.Amount(
parent.TxOut[in.PreviousOutPoint.Index].Value,
)
}
for _, out := range tx.TxOut {
balance -= btcutil.Amount(out.Value)
}
return balance, nil
}
// testGarbageCollectLinkNodes tests that we properly garbase collect link nodes
// from the database and the set of persistent connections within the server.
func testGarbageCollectLinkNodes(net *lntest.NetworkHarness, t *harnessTest) {

483
lntest/itest/utils.go Normal file
View File

@ -0,0 +1,483 @@
package itest
import (
"context"
"crypto/rand"
"fmt"
"io"
"time"
"github.com/btcsuite/btcd/rpcclient"
"github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcutil"
"github.com/go-errors/errors"
"github.com/lightningnetwork/lnd/input"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lnrpc/routerrpc"
"github.com/lightningnetwork/lnd/lntest"
"github.com/lightningnetwork/lnd/lntest/wait"
"github.com/lightningnetwork/lnd/lnwallet"
"github.com/lightningnetwork/lnd/lnwallet/chainfee"
"github.com/lightningnetwork/lnd/lnwire"
"github.com/stretchr/testify/require"
)
// completePaymentRequests sends payments from a lightning node to complete all
// payment requests. If the awaitResponse parameter is true, this function
// does not return until all payments successfully complete without errors.
func completePaymentRequests(ctx context.Context, client lnrpc.LightningClient,
routerClient routerrpc.RouterClient, paymentRequests []string,
awaitResponse bool) error {
// We start by getting the current state of the client's channels. This
// is needed to ensure the payments actually have been committed before
// we return.
ctxt, _ := context.WithTimeout(ctx, defaultTimeout)
req := &lnrpc.ListChannelsRequest{}
listResp, err := client.ListChannels(ctxt, req)
if err != nil {
return err
}
// send sends a payment and returns an error if it doesn't succeeded.
send := func(payReq string) error {
ctxc, cancel := context.WithCancel(ctx)
defer cancel()
payStream, err := routerClient.SendPaymentV2(
ctxc,
&routerrpc.SendPaymentRequest{
PaymentRequest: payReq,
TimeoutSeconds: 60,
FeeLimitMsat: noFeeLimitMsat,
},
)
if err != nil {
return err
}
resp, err := getPaymentResult(payStream)
if err != nil {
return err
}
if resp.Status != lnrpc.Payment_SUCCEEDED {
return errors.New(resp.FailureReason)
}
return nil
}
// Launch all payments simultaneously.
results := make(chan error)
for _, payReq := range paymentRequests {
payReqCopy := payReq
go func() {
err := send(payReqCopy)
if awaitResponse {
results <- err
}
}()
}
// If awaiting a response, verify that all payments succeeded.
if awaitResponse {
for range paymentRequests {
err := <-results
if err != nil {
return err
}
}
return nil
}
// We are not waiting for feedback in the form of a response, but we
// should still wait long enough for the server to receive and handle
// the send before cancelling the request. We wait for the number of
// updates to one of our channels has increased before we return.
err = wait.Predicate(func() bool {
ctxt, _ = context.WithTimeout(ctx, defaultTimeout)
newListResp, err := client.ListChannels(ctxt, req)
if err != nil {
return false
}
// If the number of open channels is now lower than before
// attempting the payments, it means one of the payments
// triggered a force closure (for example, due to an incorrect
// preimage). Return early since it's clear the payment was
// attempted.
if len(newListResp.Channels) < len(listResp.Channels) {
return true
}
for _, c1 := range listResp.Channels {
for _, c2 := range newListResp.Channels {
if c1.ChannelPoint != c2.ChannelPoint {
continue
}
// If this channel has an increased numbr of
// updates, we assume the payments are
// committed, and we can return.
if c2.NumUpdates > c1.NumUpdates {
return true
}
}
}
return false
}, defaultTimeout)
if err != nil {
return err
}
return nil
}
// makeFakePayHash creates random pre image hash
func makeFakePayHash(t *harnessTest) []byte {
randBuf := make([]byte, 32)
if _, err := rand.Read(randBuf); err != nil {
t.Fatalf("internal error, cannot generate random string: %v", err)
}
return randBuf
}
// createPayReqs is a helper method that will create a slice of payment
// requests for the given node.
func createPayReqs(node *lntest.HarnessNode, paymentAmt btcutil.Amount,
numInvoices int) ([]string, [][]byte, []*lnrpc.Invoice, error) {
payReqs := make([]string, numInvoices)
rHashes := make([][]byte, numInvoices)
invoices := make([]*lnrpc.Invoice, numInvoices)
for i := 0; i < numInvoices; i++ {
preimage := make([]byte, 32)
_, err := rand.Read(preimage)
if err != nil {
return nil, nil, nil, fmt.Errorf("unable to generate "+
"preimage: %v", err)
}
invoice := &lnrpc.Invoice{
Memo: "testing",
RPreimage: preimage,
Value: int64(paymentAmt),
}
ctxt, _ := context.WithTimeout(
context.Background(), defaultTimeout,
)
resp, err := node.AddInvoice(ctxt, invoice)
if err != nil {
return nil, nil, nil, fmt.Errorf("unable to add "+
"invoice: %v", err)
}
// Set the payment address in the invoice so the caller can
// properly use it.
invoice.PaymentAddr = resp.PaymentAddr
payReqs[i] = resp.PaymentRequest
rHashes[i] = resp.RHash
invoices[i] = invoice
}
return payReqs, rHashes, invoices, nil
}
// getChanInfo is a helper method for getting channel info for a node's sole
// channel.
func getChanInfo(ctx context.Context, node *lntest.HarnessNode) (
*lnrpc.Channel, error) {
req := &lnrpc.ListChannelsRequest{}
channelInfo, err := node.ListChannels(ctx, req)
if err != nil {
return nil, err
}
if len(channelInfo.Channels) != 1 {
return nil, fmt.Errorf("node should only have a single "+
"channel, instead it has %v", len(channelInfo.Channels))
}
return channelInfo.Channels[0], nil
}
// commitType is a simple enum used to run though the basic funding flow with
// different commitment formats.
type commitType byte
const (
// commitTypeLegacy is the old school commitment type.
commitTypeLegacy commitType = iota
// commiTypeTweakless is the commitment type where the remote key is
// static (non-tweaked).
commitTypeTweakless
// commitTypeAnchors is the kind of commitment that has extra outputs
// used for anchoring down to commitment using CPFP.
commitTypeAnchors
)
// String returns that name of the commitment type.
func (c commitType) String() string {
switch c {
case commitTypeLegacy:
return "legacy"
case commitTypeTweakless:
return "tweakless"
case commitTypeAnchors:
return "anchors"
default:
return "invalid"
}
}
// Args returns the command line flag to supply to enable this commitment type.
func (c commitType) Args() []string {
switch c {
case commitTypeLegacy:
return []string{"--protocol.legacy.committweak"}
case commitTypeTweakless:
return []string{}
case commitTypeAnchors:
return []string{"--protocol.anchors"}
}
return nil
}
// calcStaticFee calculates appropriate fees for commitment transactions. This
// function provides a simple way to allow test balance assertions to take fee
// calculations into account.
func (c commitType) calcStaticFee(numHTLCs int) btcutil.Amount {
const htlcWeight = input.HTLCWeight
var (
feePerKw = chainfee.SatPerKVByte(50000).FeePerKWeight()
commitWeight = input.CommitWeight
anchors = btcutil.Amount(0)
)
// The anchor commitment type is slightly heavier, and we must also add
// the value of the two anchors to the resulting fee the initiator
// pays. In addition the fee rate is capped at 10 sat/vbyte for anchor
// channels.
if c == commitTypeAnchors {
feePerKw = chainfee.SatPerKVByte(
lnwallet.DefaultAnchorsCommitMaxFeeRateSatPerVByte * 1000,
).FeePerKWeight()
commitWeight = input.AnchorCommitWeight
anchors = 2 * anchorSize
}
return feePerKw.FeeForWeight(int64(commitWeight+htlcWeight*numHTLCs)) +
anchors
}
// channelCommitType retrieves the active channel commitment type for the given
// chan point.
func channelCommitType(node *lntest.HarnessNode,
chanPoint *lnrpc.ChannelPoint) (commitType, error) {
ctxb := context.Background()
ctxt, _ := context.WithTimeout(ctxb, defaultTimeout)
req := &lnrpc.ListChannelsRequest{}
channels, err := node.ListChannels(ctxt, req)
if err != nil {
return 0, fmt.Errorf("listchannels failed: %v", err)
}
for _, c := range channels.Channels {
if c.ChannelPoint == txStr(chanPoint) {
switch c.CommitmentType {
// If the anchor output size is non-zero, we are
// dealing with the anchor type.
case lnrpc.CommitmentType_ANCHORS:
return commitTypeAnchors, nil
// StaticRemoteKey means it is tweakless,
case lnrpc.CommitmentType_STATIC_REMOTE_KEY:
return commitTypeTweakless, nil
// Otherwise legacy.
default:
return commitTypeLegacy, nil
}
}
}
return 0, fmt.Errorf("channel point %v not found", chanPoint)
}
// calculateMaxHtlc re-implements the RequiredRemoteChannelReserve of the
// funding manager's config, which corresponds to the maximum MaxHTLC value we
// allow users to set when updating a channel policy.
func calculateMaxHtlc(chanCap btcutil.Amount) uint64 {
reserve := lnwire.NewMSatFromSatoshis(chanCap / 100)
max := lnwire.NewMSatFromSatoshis(chanCap) - reserve
return uint64(max)
}
// waitForNodeBlockHeight queries the node for its current block height until
// it reaches the passed height.
func waitForNodeBlockHeight(ctx context.Context, node *lntest.HarnessNode,
height int32) error {
var predErr error
err := wait.Predicate(func() bool {
ctxt, _ := context.WithTimeout(ctx, defaultTimeout)
info, err := node.GetInfo(ctxt, &lnrpc.GetInfoRequest{})
if err != nil {
predErr = err
return false
}
if int32(info.BlockHeight) != height {
predErr = fmt.Errorf("expected block height to "+
"be %v, was %v", height, info.BlockHeight)
return false
}
return true
}, defaultTimeout)
if err != nil {
return predErr
}
return nil
}
// getNTxsFromMempool polls until finding the desired number of transactions in
// the provided miner's mempool and returns the full transactions to the caller.
func getNTxsFromMempool(miner *rpcclient.Client, n int,
timeout time.Duration) ([]*wire.MsgTx, error) {
txids, err := waitForNTxsInMempool(miner, n, timeout)
if err != nil {
return nil, err
}
var txes []*wire.MsgTx
for _, txid := range txids {
tx, err := miner.GetRawTransaction(txid)
if err != nil {
return nil, err
}
txes = append(txes, tx.MsgTx())
}
return txes, nil
}
// getTxFee retrieves parent transactions and reconstructs the fee paid.
func getTxFee(miner *rpcclient.Client, tx *wire.MsgTx) (btcutil.Amount, error) {
var balance btcutil.Amount
for _, in := range tx.TxIn {
parentHash := in.PreviousOutPoint.Hash
rawTx, err := miner.GetRawTransaction(&parentHash)
if err != nil {
return 0, err
}
parent := rawTx.MsgTx()
balance += btcutil.Amount(
parent.TxOut[in.PreviousOutPoint.Index].Value,
)
}
for _, out := range tx.TxOut {
balance -= btcutil.Amount(out.Value)
}
return balance, nil
}
// channelSubscription houses the proxied update and error chans for a node's
// channel subscriptions.
type channelSubscription struct {
updateChan chan *lnrpc.ChannelEventUpdate
errChan chan error
quit chan struct{}
}
// subscribeChannelNotifications subscribes to channel updates and launches a
// goroutine that forwards these to the returned channel.
func subscribeChannelNotifications(ctxb context.Context, t *harnessTest,
node *lntest.HarnessNode) channelSubscription {
// We'll first start by establishing a notification client which will
// send us notifications upon channels becoming active, inactive or
// closed.
req := &lnrpc.ChannelEventSubscription{}
ctx, cancelFunc := context.WithCancel(ctxb)
chanUpdateClient, err := node.SubscribeChannelEvents(ctx, req)
if err != nil {
t.Fatalf("unable to create channel update client: %v", err)
}
// We'll launch a goroutine that will be responsible for proxying all
// notifications recv'd from the client into the channel below.
errChan := make(chan error, 1)
quit := make(chan struct{})
chanUpdates := make(chan *lnrpc.ChannelEventUpdate, 20)
go func() {
defer cancelFunc()
for {
select {
case <-quit:
return
default:
chanUpdate, err := chanUpdateClient.Recv()
select {
case <-quit:
return
default:
}
if err == io.EOF {
return
} else if err != nil {
select {
case errChan <- err:
case <-quit:
}
return
}
select {
case chanUpdates <- chanUpdate:
case <-quit:
return
}
}
}
}()
return channelSubscription{
updateChan: chanUpdates,
errChan: errChan,
quit: quit,
}
}
// findTxAtHeight gets all of the transactions that a node's wallet has a record
// of at the target height, and finds and returns the tx with the target txid,
// failing if it is not found.
func findTxAtHeight(ctx context.Context, t *harnessTest, height int32,
target string, node *lntest.HarnessNode) *lnrpc.Transaction {
txns, err := node.LightningClient.GetTransactions(
ctx, &lnrpc.GetTransactionsRequest{
StartHeight: height,
EndHeight: height,
},
)
require.NoError(t.t, err, "could not get transactions")
for _, tx := range txns.Transactions {
if tx.TxHash == target {
return tx
}
}
return nil
}