From cd9f6f142b6fb40bd4dfd9d39882b91223acb399 Mon Sep 17 00:00:00 2001 From: George Tsagkarelis Date: Tue, 11 Apr 2023 15:13:06 +0300 Subject: [PATCH 1/4] cmd+looprpc: add new parameters for easy autoloop This commit introduces the new parameters to the protofiles and the cmd interface. If easy autoloop is enabled we just ignore the rest of the rules and use the defaults of easy autoloop. --- cmd/loop/liquidity.go | 22 +++ looprpc/client.pb.go | 358 ++++++++++++++++++++---------------- looprpc/client.proto | 15 ++ looprpc/client.swagger.json | 9 + 4 files changed, 241 insertions(+), 163 deletions(-) diff --git a/cmd/loop/liquidity.go b/cmd/loop/liquidity.go index be3d90b..c841846 100644 --- a/cmd/loop/liquidity.go +++ b/cmd/loop/liquidity.go @@ -324,6 +324,17 @@ var setParamsCommand = cli.Command{ Usage: "the confirmation target for loop in on-chain " + "htlcs", }, + cli.BoolFlag{ + Name: "easyautoloop", + Usage: "set to true to enable easy autoloop, which " + + "will automatically dispatch swaps in order " + + "to meet the target local balance", + }, + cli.Uint64Flag{ + Name: "localbalancesat", + Usage: "the target size of total local balance in " + + "satoshis, used by easy autoloop", + }, }, Action: setParams, } @@ -465,6 +476,17 @@ func setParams(ctx *cli.Context) error { flagSet = true } + if ctx.IsSet("easyautoloop") { + params.EasyAutoloop = ctx.Bool("easyautoloop") + flagSet = true + } + + if ctx.IsSet("localbalancesat") { + params.EasyAutoloopLocalTargetSat = + ctx.Uint64("localbalancesat") + flagSet = true + } + if !flagSet { return fmt.Errorf("at least one flag required to set params") } diff --git a/looprpc/client.pb.go b/looprpc/client.pb.go index c38d42a..28ac7ea 100644 --- a/looprpc/client.pb.go +++ b/looprpc/client.pb.go @@ -2209,6 +2209,17 @@ type LiquidityParameters struct { //The time at which the autoloop budget was last refreshed, expressed as a //UNIX timestamp in seconds. AutoloopBudgetLastRefresh uint64 `protobuf:"varint,20,opt,name=autoloop_budget_last_refresh,json=autoloopBudgetLastRefresh,proto3" json:"autoloop_budget_last_refresh,omitempty"` + // + //Set to true to enable easy autoloop. If set, all channel/peer rules will be + //overridden and the client will automatically dispatch swaps in order to meet + //the configured local balance target size. Currently only loop out is + //supported, meaning that easy autoloop can only reduce the funds that are + //held as balance in channels. + EasyAutoloop bool `protobuf:"varint,21,opt,name=easy_autoloop,json=easyAutoloop,proto3" json:"easy_autoloop,omitempty"` + // + //The local balance target size, expressed in satoshis. This is used by easy + //autoloop to determine how much liquidity should be maintained in channels. + EasyAutoloopLocalTargetSat uint64 `protobuf:"varint,22,opt,name=easy_autoloop_local_target_sat,json=easyAutoloopLocalTargetSat,proto3" json:"easy_autoloop_local_target_sat,omitempty"` } func (x *LiquidityParameters) Reset() { @@ -2384,6 +2395,20 @@ func (x *LiquidityParameters) GetAutoloopBudgetLastRefresh() uint64 { return 0 } +func (x *LiquidityParameters) GetEasyAutoloop() bool { + if x != nil { + return x.EasyAutoloop + } + return false +} + +func (x *LiquidityParameters) GetEasyAutoloopLocalTargetSat() uint64 { + if x != nil { + return x.EasyAutoloopLocalTargetSat + } + return 0 +} + type LiquidityRule struct { state protoimpl.MessageState sizeCache protoimpl.SizeCache @@ -2983,7 +3008,7 @@ var file_client_proto_rawDesc = []byte{ 0x73, 0x74, 0x6f, 0x72, 0x61, 0x67, 0x65, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x08, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0b, 0x73, 0x74, 0x6f, 0x72, 0x61, 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If set, all channel/peer rules will be + overridden and the client will automatically dispatch swaps in order to meet + the configured local balance target size. Currently only loop out is + supported, meaning that easy autoloop can only reduce the funds that are + held as balance in channels. + */ + bool easy_autoloop = 21; + + /* + The local balance target size, expressed in satoshis. This is used by easy + autoloop to determine how much liquidity should be maintained in channels. + */ + uint64 easy_autoloop_local_target_sat = 22; } enum LiquidityRuleType { diff --git a/looprpc/client.swagger.json b/looprpc/client.swagger.json index 49ea09e..cb97a6e 100644 --- a/looprpc/client.swagger.json +++ b/looprpc/client.swagger.json @@ -694,6 +694,15 @@ "type": "string", "format": "uint64", "description": "The time at which the autoloop budget was last refreshed, expressed as a\nUNIX timestamp in seconds." + }, + "easy_autoloop": { + "type": "boolean", + "description": "Set to true to enable easy autoloop. If set, all channel/peer rules will be\noverridden and the client will automatically dispatch swaps in order to meet\nthe configured local balance target size. Currently only loop out is\nsupported, meaning that easy autoloop can only reduce the funds that are\nheld as balance in channels." + }, + "easy_autoloop_local_target_sat": { + "type": "string", + "format": "uint64", + "description": "The local balance target size, expressed in satoshis. This is used by easy\nautoloop to determine how much liquidity should be maintained in channels." } } }, From fad9f40ae3eed0d2df17d69573b238862e382852 Mon Sep 17 00:00:00 2001 From: George Tsagkarelis Date: Tue, 11 Apr 2023 15:14:03 +0300 Subject: [PATCH 2/4] liquidity+loopd: add easy autoloop Adds the easy autoloop function which executes a budget update and the best easy-autoloop swap. The easy-autoloop function re-uses functions used in the normal autoloop that relate to on-going swaps and traffic summary. --- liquidity/liquidity.go | 323 +++++++++++++++++++++++++++++++++++++--- liquidity/parameters.go | 24 ++- loopd/utils.go | 2 + 3 files changed, 322 insertions(+), 27 deletions(-) diff --git a/liquidity/liquidity.go b/liquidity/liquidity.go index e2b9766..4d371e3 100644 --- a/liquidity/liquidity.go +++ b/liquidity/liquidity.go @@ -36,6 +36,7 @@ import ( "context" "errors" "fmt" + "math" "sort" "sync" "time" @@ -201,6 +202,12 @@ type Config struct { LoopIn func(ctx context.Context, request *loop.LoopInRequest) (*loop.LoopInSwapInfo, error) + // LoopInTerms returns the terms for a loop in swap. + LoopInTerms func(ctx context.Context) (*loop.LoopInTerms, error) + + // LoopOutTerms returns the terms for a loop out swap. + LoopOutTerms func(ctx context.Context) (*loop.LoopOutTerms, error) + // Clock allows easy mocking of time in unit tests. Clock clock.Clock @@ -234,6 +241,15 @@ type Manager struct { // paramsLock is a lock for our current set of parameters. paramsLock sync.Mutex + + // activeStickyLoops is a counter that helps us keep track of currently + // active sticky loops. We use this to ensure we don't dispatch more + // than the max configured loops at a time. + activeStickyLoops int + + // activeStickyLock is a lock to ensure atomic access to the + // activeStickyLoops counter. + activeStickyLock sync.Mutex } // Run periodically checks whether we should automatically dispatch a loop out. @@ -259,15 +275,24 @@ func (m *Manager) Run(ctx context.Context) error { for { select { case <-m.cfg.AutoloopTicker.Ticks(): - err := m.autoloop(ctx) - switch err { - case ErrNoRules: - log.Debugf("No rules configured for autoloop") + if m.params.EasyAutoloop { + err := m.easyAutoLoop(ctx) + if err != nil { + log.Errorf("easy autoloop failed: %v", + err) + } + } else { + err := m.autoloop(ctx) + switch err { + case ErrNoRules: + log.Debugf("no rules configured for " + + "autoloop") - case nil: + case nil: - default: - log.Errorf("autoloop failed: %v", err) + default: + log.Errorf("autoloop failed: %v", err) + } } case <-ctx.Done(): @@ -446,6 +471,29 @@ func (m *Manager) autoloop(ctx context.Context) error { return nil } +// easyAutoLoop is the main entry point for the easy auto loop functionality. +// This function will try to dispatch a swap in order to meet the easy autoloop +// requirements. For easyAutoloop to work there needs to be an +// EasyAutoloopTarget defined in the parameters. Easy autoloop also uses the +// configured max inflight swaps and budget rules defined in the parameters. +func (m *Manager) easyAutoLoop(ctx context.Context) error { + if !m.params.Autoloop { + return nil + } + + // First check if we should refresh our budget before calculating any + // swaps for autoloop. + m.refreshAutoloopBudget(ctx) + + // Dispatch the best easy autoloop swap. + err := m.dispatchBestEasyAutoloopSwap(ctx) + if err != nil { + return err + } + + return nil +} + // ForceAutoLoop force-ticks our auto-out ticker. func (m *Manager) ForceAutoLoop(ctx context.Context) error { select { @@ -457,6 +505,135 @@ func (m *Manager) ForceAutoLoop(ctx context.Context) error { } } +// dispatchBestEasyAutoloopSwap tries to dispatch a swap to bring the total +// local balance back to the target. +func (m *Manager) dispatchBestEasyAutoloopSwap(ctx context.Context) error { + // Retrieve existing swaps. + loopOut, err := m.cfg.ListLoopOut() + if err != nil { + return err + } + + loopIn, err := m.cfg.ListLoopIn() + if err != nil { + return err + } + + // Get a summary of our existing swaps so that we can check our autoloop + // budget. + summary, err := m.checkExistingAutoLoops(ctx, loopOut, loopIn) + if err != nil { + return err + } + + err = m.checkSummaryBudget(summary) + if err != nil { + return err + } + + _, err = m.checkSummaryInflight(summary) + if err != nil { + return err + } + + // Get all channels in order to calculate current total local balance. + channels, err := m.cfg.Lnd.Client.ListChannels(ctx, false, false) + if err != nil { + return err + } + + localTotal := btcutil.Amount(0) + for _, channel := range channels { + localTotal += channel.LocalBalance + } + + // Since we're only autolooping-out we need to check if we are below + // the target, meaning that we already meet the requirements. + if localTotal <= m.params.EasyAutoloopTarget { + log.Debugf("total local balance %v below target %v", + localTotal, m.params.EasyAutoloopTarget) + return nil + } + + restrictions, err := m.cfg.Restrictions(ctx, swap.TypeOut) + if err != nil { + return err + } + + // Calculate the amount that we want to loop out. If it exceeds the max + // allowed clamp it to max. + amount := localTotal - m.params.EasyAutoloopTarget + if amount > restrictions.Maximum { + amount = btcutil.Amount(restrictions.Maximum) + } + + // If the amount we want to loop out is less than the minimum we can't + // proceed with a swap, so we return early. + if amount < restrictions.Minimum { + log.Debugf("easy autoloop: swap amount is below minimum swap "+ + "size, minimum=%v, need to swap %v", + restrictions.Minimum, amount) + return nil + } + + log.Debugf("easy autoloop: local_total=%v, target=%v, "+ + "attempting to loop out %v", localTotal, + m.params.EasyAutoloopTarget, amount) + + // Start building that swap. + builder := newLoopOutBuilder(m.cfg) + + channel := m.pickEasyAutoloopChannel( + channels, restrictions, loopOut, loopIn, amount, + ) + if channel == nil { + return fmt.Errorf("no eligible channel for easy autoloop") + } + + log.Debugf("easy autoloop: picked channel %v with local balance %v", + channel.ChannelID, channel.LocalBalance) + + swapAmt, err := btcutil.NewAmount( + math.Min(channel.LocalBalance.ToBTC(), amount.ToBTC()), + ) + if err != nil { + return err + } + + // Override our current parameters in order to use the const percent + // limit of easy-autoloop. + easyParams := m.params + easyParams.FeeLimit = &FeePortion{ + PartsPerMillion: defaultFeePPM, + } + + // Set the swap outgoing channel to the chosen channel. + outgoing := []lnwire.ShortChannelID{ + lnwire.NewShortChanIDFromInt(channel.ChannelID), + } + + suggestion, err := builder.buildSwap( + ctx, channel.PubKeyBytes, outgoing, swapAmt, true, easyParams, + ) + if err != nil { + return err + } + + swap := loop.OutRequest{} + if t, ok := suggestion.(*loopOutSwapSuggestion); ok { + swap = t.OutRequest + } else { + return fmt.Errorf("unexpected swap suggestion type: %T", t) + } + + // Dispatch a sticky loop out. + go m.dispatchStickyLoopOut( + ctx, swap, defaultAmountBackoffRetry, defaultAmountBackoff, + ) + + return nil +} + // Suggestions provides a set of suggested swaps, and the set of channels that // were excluded from consideration. type Suggestions struct { @@ -563,23 +740,13 @@ func (m *Manager) SuggestSwaps(ctx context.Context, autoloop bool) ( return nil, err } - if summary.totalFees() >= m.params.AutoFeeBudget { - log.Debugf("autoloop fee budget: %v exhausted, %v spent on "+ - "completed swaps, %v reserved for ongoing swaps "+ - "(upper limit)", - m.params.AutoFeeBudget, summary.spentFees, - summary.pendingFees) - + err = m.checkSummaryBudget(summary) + if err != nil { return m.singleReasonSuggestion(ReasonBudgetElapsed), nil } - // If we have already reached our total allowed number of in flight - // swaps, we do not suggest any more at the moment. - allowedSwaps := m.params.MaxAutoInFlight - summary.inFlightCount - if allowedSwaps <= 0 { - log.Debugf("%v autoloops allowed, %v in flight", - m.params.MaxAutoInFlight, summary.inFlightCount) - + allowedSwaps, err := m.checkSummaryInflight(summary) + if err != nil { return m.singleReasonSuggestion(ReasonInFlight), nil } @@ -1058,12 +1225,31 @@ func (m *Manager) refreshAutoloopBudget(ctx context.Context) { func (m *Manager) dispatchStickyLoopOut(ctx context.Context, out loop.OutRequest, retryCount uint16, amountBackoff float64) { + // Check our sticky loop counter to decide whether we should continue + // executing this loop. + m.activeStickyLock.Lock() + if m.activeStickyLoops >= m.params.MaxAutoInFlight { + m.activeStickyLock.Unlock() + return + } + + m.activeStickyLoops += 1 + m.activeStickyLock.Unlock() + + // No matter the outcome, decrease the counter upon exiting sticky loop. + defer func() { + m.activeStickyLock.Lock() + m.activeStickyLoops -= 1 + m.activeStickyLock.Unlock() + }() + for i := 0; i < int(retryCount); i++ { // Dispatch the swap. swap, err := m.cfg.LoopOut(ctx, &out) if err != nil { - log.Errorf("unable to dispatch loop out, hash: %v, "+ - "err: %v", swap.SwapHash, err) + log.Errorf("unable to dispatch loop out, amt: %v, "+ + "err: %v", out.Amount, err) + return } log.Infof("loop out automatically dispatched: hash: %v, "+ @@ -1190,6 +1376,97 @@ func (m *Manager) waitForSwapPayment(ctx context.Context, swapHash lntypes.Hash, updateChan <- nil } +// pickEasyAutoloopChannel picks a channel to be used for an easy autoloop swap. +// This function prioritizes channels with high local balance but also consults +// previous failures and ongoing swaps to avoid temporary channel failures or +// swap conflicts. +func (m *Manager) pickEasyAutoloopChannel(channels []lndclient.ChannelInfo, + restrictions *Restrictions, loopOut []*loopdb.LoopOut, + loopIn []*loopdb.LoopIn, amount btcutil.Amount) *lndclient.ChannelInfo { + + traffic := m.currentSwapTraffic(loopOut, loopIn) + + // Sort the candidate channels based on descending local balance. We + // want to prioritize picking a channel with the highest possible local + // balance. + sort.Slice(channels, func(i, j int) bool { + return channels[i].LocalBalance > channels[j].LocalBalance + }) + + // Check each channel, since channels are already sorted we return the + // first channel that passes all checks. + for _, channel := range channels { + shortChanID := lnwire.NewShortChanIDFromInt(channel.ChannelID) + + if !channel.Active { + log.Debugf("Channel %v cannot be used for easy "+ + "autoloop: inactive", channel.ChannelID) + continue + } + + lastFail, recentFail := traffic.failedLoopOut[shortChanID] + if recentFail { + log.Debugf("Channel %v cannot be used for easy "+ + "autoloop: last failed swap was at %v", + channel.ChannelID, lastFail) + continue + } + + if traffic.ongoingLoopOut[shortChanID] { + log.Debugf("Channel %v cannot be used for easy "+ + "autoloop: ongoing swap", channel.ChannelID) + continue + } + + if channel.LocalBalance < restrictions.Minimum { + log.Debugf("Channel %v cannot be used for easy "+ + "autoloop: insufficient local balance %v,"+ + "minimum is %v, skipping remaining channels", + channel.ChannelID, channel.LocalBalance, + restrictions.Minimum) + return nil + } + + return &channel + } + + return nil +} + +func (m *Manager) numActiveStickyLoops() int { + m.activeStickyLock.Lock() + defer m.activeStickyLock.Unlock() + + return m.activeStickyLoops + +} + +func (m *Manager) checkSummaryBudget(summary *existingAutoLoopSummary) error { + if summary.totalFees() >= m.params.AutoFeeBudget { + return fmt.Errorf("autoloop fee budget: %v exhausted, %v spent on "+ + "completed swaps, %v reserved for ongoing swaps "+ + "(upper limit)", + m.params.AutoFeeBudget, summary.spentFees, + summary.pendingFees) + + } + + return nil +} + +func (m *Manager) checkSummaryInflight( + summary *existingAutoLoopSummary) (int, error) { + // If we have already reached our total allowed number of in flight + // swaps we return early. + allowedSwaps := m.params.MaxAutoInFlight - summary.inFlightCount + if allowedSwaps <= 0 { + return 0, fmt.Errorf("%v autoloops allowed, %v in flight", + m.params.MaxAutoInFlight, summary.inFlightCount) + } + + return allowedSwaps, nil +} + // swapTraffic contains a summary of our current and previously failed swaps. type swapTraffic struct { ongoingLoopOut map[lnwire.ShortChannelID]bool diff --git a/liquidity/parameters.go b/liquidity/parameters.go index a1823d0..34f8ae1 100644 --- a/liquidity/parameters.go +++ b/liquidity/parameters.go @@ -98,6 +98,14 @@ type Parameters struct { // CustomPaymentCheckInterval is an optional custom interval to use when // checking an autoloop loop out payments' payment status. CustomPaymentCheckInterval time.Duration + + // EasyAutoloop is a boolean that indicates whether we should use the + // easy autoloop feature. + EasyAutoloop bool + + // EasyAutoloopTarget is the target amount of liquidity that we want to + // maintain in our channels. + EasyAutoloopTarget btcutil.Amount } // String returns the string representation of our parameters. @@ -397,7 +405,9 @@ func RpcToParameters(req *clientrpc.LiquidityParameters) (*Parameters, Minimum: btcutil.Amount(req.MinSwapAmount), Maximum: btcutil.Amount(req.MaxSwapAmount), }, - HtlcConfTarget: req.HtlcConfTarget, + HtlcConfTarget: req.HtlcConfTarget, + EasyAutoloop: req.EasyAutoloop, + EasyAutoloopTarget: btcutil.Amount(req.EasyAutoloopLocalTargetSat), } if req.AutoloopBudgetRefreshPeriodSec != 0 { @@ -493,9 +503,15 @@ func ParametersToRpc(cfg Parameters) (*clientrpc.LiquidityParameters, Rules: make( []*clientrpc.LiquidityRule, 0, totalRules, ), - MinSwapAmount: uint64(cfg.ClientRestrictions.Minimum), - MaxSwapAmount: uint64(cfg.ClientRestrictions.Maximum), - HtlcConfTarget: cfg.HtlcConfTarget, + MinSwapAmount: uint64( + cfg.ClientRestrictions.Minimum, + ), + MaxSwapAmount: uint64( + cfg.ClientRestrictions.Maximum, + ), + HtlcConfTarget: cfg.HtlcConfTarget, + EasyAutoloop: cfg.EasyAutoloop, + EasyAutoloopLocalTargetSat: uint64(cfg.EasyAutoloopTarget), } switch f := cfg.FeeLimit.(type) { diff --git a/loopd/utils.go b/loopd/utils.go index 67fdefc..cb0c267 100644 --- a/loopd/utils.go +++ b/loopd/utils.go @@ -72,6 +72,8 @@ func getLiquidityManager(client *loop.Client) *liquidity.Manager { ListLoopOut: client.Store.FetchLoopOutSwaps, GetLoopOut: client.Store.FetchLoopOutSwap, ListLoopIn: client.Store.FetchLoopInSwaps, + LoopInTerms: client.LoopInTerms, + LoopOutTerms: client.LoopOutTerms, MinimumConfirmations: minConfTarget, PutLiquidityParams: client.Store.PutLiquidityParams, FetchLiquidityParams: client.Store.FetchLiquidityParams, From 9a9766775a4d3030015a89cfa5a9ba762a5a4151 Mon Sep 17 00:00:00 2001 From: George Tsagkarelis Date: Thu, 4 May 2023 15:51:22 +0300 Subject: [PATCH 3/4] liquidity: add easy autoloop test --- liquidity/autoloop_test.go | 222 +++++++++++++++++++++++-- liquidity/autoloop_testcontext_test.go | 58 +++++++ 2 files changed, 262 insertions(+), 18 deletions(-) diff --git a/liquidity/autoloop_test.go b/liquidity/autoloop_test.go index b682c5c..ecab8a8 100644 --- a/liquidity/autoloop_test.go +++ b/liquidity/autoloop_test.go @@ -207,7 +207,7 @@ func TestAutoLoopEnabled(t *testing.T) { Events: []*loopdb.LoopEvent{ { SwapStateData: loopdb.SwapStateData{ - State: loopdb.StateInitiated, + State: loopdb.StateSuccess, }, }, }, @@ -472,7 +472,7 @@ func TestAutoloopAddress(t *testing.T) { Events: []*loopdb.LoopEvent{ { SwapStateData: loopdb.SwapStateData{ - State: loopdb.StateHtlcPublished, + State: loopdb.StateSuccess, }, }, }, @@ -647,7 +647,7 @@ func TestCompositeRules(t *testing.T) { Events: []*loopdb.LoopEvent{ { SwapStateData: loopdb.SwapStateData{ - State: loopdb.StateHtlcPublished, + State: loopdb.StateSuccess, }, }, }, @@ -984,7 +984,7 @@ func TestAutoloopBothTypes(t *testing.T) { Events: []*loopdb.LoopEvent{ { SwapStateData: loopdb.SwapStateData{ - State: loopdb.StateHtlcPublished, + State: loopdb.SwapState(loopdb.StateSuccess), }, }, }, @@ -1162,15 +1162,28 @@ func TestAutoLoopRecurringBudget(t *testing.T) { }, }, } + + singleLoopOut = &loopdb.LoopOut{ + Loop: loopdb.Loop{ + Events: []*loopdb.LoopEvent{ + { + SwapStateData: loopdb.SwapStateData{ + State: loopdb.SwapState(loopdb.StateSuccess), + }, + }, + }, + }, + } ) // Tick our autolooper with no existing swaps, we expect a loop out // swap to be dispatched on first channel. step := &autoloopStep{ - minAmt: 1, - maxAmt: amt + 1, - quotesOut: quotes1, - expectedOut: loopOuts1, + minAmt: 1, + maxAmt: amt + 1, + quotesOut: quotes1, + expectedOut: loopOuts1, + existingOutSingle: singleLoopOut, } c.autoloop(step) @@ -1188,11 +1201,12 @@ func TestAutoLoopRecurringBudget(t *testing.T) { } step = &autoloopStep{ - minAmt: 1, - maxAmt: amt + 1, - quotesOut: quotes2, - existingOut: existing, - expectedOut: nil, + minAmt: 1, + maxAmt: amt + 1, + quotesOut: quotes2, + existingOut: existing, + expectedOut: nil, + existingOutSingle: singleLoopOut, } // Tick again, we should expect no loop outs because our budget would be // exceeded. @@ -1222,11 +1236,12 @@ func TestAutoLoopRecurringBudget(t *testing.T) { c.testClock.SetTime(testTime.Add(time.Hour * 25)) step = &autoloopStep{ - minAmt: 1, - maxAmt: amt + 1, - quotesOut: quotes2, - existingOut: existing2, - expectedOut: loopOuts2, + minAmt: 1, + maxAmt: amt + 1, + quotesOut: quotes2, + existingOut: existing2, + expectedOut: loopOuts2, + existingOutSingle: singleLoopOut, } // Tick again, we should expect a loop out to occur on the 2nd channel. @@ -1235,6 +1250,177 @@ func TestAutoLoopRecurringBudget(t *testing.T) { c.stop() } +// TestEasyAutoloop tests that the easy autoloop logic works as expected. This +// involves testing that channels are correctly selected and that the balance +// target is successfully met. +func TestEasyAutoloop(t *testing.T) { + defer test.Guard(t) + + // We need to change the default channels we use for tests so that they + // have different local balances in order to know which one is going to + // be selected by easy autoloop. + easyChannel1 := lndclient.ChannelInfo{ + Active: true, + ChannelID: chanID1.ToUint64(), + PubKeyBytes: peer1, + LocalBalance: 95000, + RemoteBalance: 0, + Capacity: 100000, + } + + easyChannel2 := lndclient.ChannelInfo{ + Active: true, + ChannelID: chanID1.ToUint64(), + PubKeyBytes: peer1, + LocalBalance: 75000, + RemoteBalance: 0, + Capacity: 100000, + } + + var ( + channels = []lndclient.ChannelInfo{ + easyChannel1, easyChannel2, + } + + params = Parameters{ + Autoloop: true, + AutoFeeBudget: 36000, + AutoFeeRefreshPeriod: time.Hour * 3, + AutoloopBudgetLastRefresh: testBudgetStart, + MaxAutoInFlight: 2, + FailureBackOff: time.Hour, + SweepConfTarget: 10, + HtlcConfTarget: defaultHtlcConfTarget, + EasyAutoloop: true, + EasyAutoloopTarget: 75000, + FeeLimit: defaultFeePortion(), + } + ) + + c := newAutoloopTestCtx(t, params, channels, testRestrictions) + c.start() + + var ( + maxAmt = 50000 + + chan1Swap = &loop.OutRequest{ + Amount: btcutil.Amount(maxAmt), + OutgoingChanSet: loopdb.ChannelSet{easyChannel1.ChannelID}, + Label: labels.AutoloopLabel(swap.TypeOut), + Initiator: autoloopSwapInitiator, + } + + quotesOut1 = []quoteRequestResp{ + { + request: &loop.LoopOutQuoteRequest{ + Amount: btcutil.Amount(maxAmt), + }, + quote: &loop.LoopOutQuote{ + SwapFee: 1, + PrepayAmount: 1, + MinerFee: 1, + }, + }, + } + + loopOut1 = []loopOutRequestResp{ + { + request: chan1Swap, + response: &loop.LoopOutSwapInfo{ + SwapHash: lntypes.Hash{1}, + }, + }, + } + ) + + // We expected one max size swap to be dispatched on our channel with + // the biggest local balance. + step := &easyAutoloopStep{ + minAmt: 1, + maxAmt: 50000, + quotesOut: quotesOut1, + expectedOut: loopOut1, + } + + c.easyautoloop(step, false) + c.stop() + + // In order to reflect the change on the channel balances we create a + // new context and restart the autolooper. + easyChannel1.LocalBalance -= chan1Swap.Amount + channels = []lndclient.ChannelInfo{ + easyChannel1, easyChannel2, + } + + c = newAutoloopTestCtx(t, params, channels, testRestrictions) + c.start() + + var ( + amt2 = 45_000 + + chan2Swap = &loop.OutRequest{ + Amount: btcutil.Amount(amt2), + OutgoingChanSet: loopdb.ChannelSet{easyChannel2.ChannelID}, + Label: labels.AutoloopLabel(swap.TypeOut), + Initiator: autoloopSwapInitiator, + } + + quotesOut2 = []quoteRequestResp{ + { + request: &loop.LoopOutQuoteRequest{ + Amount: btcutil.Amount(amt2), + }, + quote: &loop.LoopOutQuote{ + SwapFee: 1, + PrepayAmount: 1, + MinerFee: 1, + }, + }, + } + + loopOut2 = []loopOutRequestResp{ + { + request: chan2Swap, + response: &loop.LoopOutSwapInfo{ + SwapHash: lntypes.Hash{1}, + }, + }, + } + ) + + // We expect a swap of size 45_000 to be dispatched in order to meet the + // defined target of 75_000. + step = &easyAutoloopStep{ + minAmt: 1, + maxAmt: 50000, + quotesOut: quotesOut2, + expectedOut: loopOut2, + } + + c.easyautoloop(step, false) + c.stop() + + // In order to reflect the change on the channel balances we create a + // new context and restart the autolooper. + easyChannel2.LocalBalance -= btcutil.Amount(amt2) + channels = []lndclient.ChannelInfo{ + easyChannel1, easyChannel2, + } + + c = newAutoloopTestCtx(t, params, channels, testRestrictions) + c.start() + + // We have met the target of 75_000 so we don't expect any action from + // easy autoloop. That's why we set noop to true in the call below. + step = &easyAutoloopStep{ + minAmt: 1, + maxAmt: 50000, + } + + c.easyautoloop(step, true) + c.stop() +} + // existingSwapFromRequest is a helper function which returns the db // representation of a loop out request with the event set provided. func existingSwapFromRequest(request *loop.OutRequest, initTime time.Time, diff --git a/liquidity/autoloop_testcontext_test.go b/liquidity/autoloop_testcontext_test.go index 8ecf27e..bbaf2b5 100644 --- a/liquidity/autoloop_testcontext_test.go +++ b/liquidity/autoloop_testcontext_test.go @@ -19,6 +19,11 @@ import ( "github.com/stretchr/testify/require" ) +const ( + defaultEventuallyTimeout = time.Second * 45 + defaultEventuallyInterval = time.Millisecond * 100 +) + type autoloopTestCtx struct { t *testing.T manager *Manager @@ -272,6 +277,15 @@ type autoloopStep struct { keepDestAddr bool } +type easyAutoloopStep struct { + minAmt btcutil.Amount + maxAmt btcutil.Amount + existingOut []*loopdb.LoopOut + existingIn []*loopdb.LoopIn + quotesOut []quoteRequestResp + expectedOut []loopOutRequestResp +} + // autoloop walks our test context through the process of triggering our // autoloop functionality, providing mocked values as required. The set of // quotes provided indicates that we expect swap suggestions to be made (since @@ -325,6 +339,50 @@ func (c *autoloopTestCtx) autoloop(step *autoloopStep) { require.True(c.t, c.matchLoopOuts(step.expectedOut, step.keepDestAddr)) require.True(c.t, c.matchLoopIns(step.expectedIn)) + + require.Eventuallyf(c.t, func() bool { + return c.manager.numActiveStickyLoops() == 0 + }, defaultEventuallyTimeout, defaultEventuallyInterval, "failed to"+ + " wait for sticky loop counter") +} + +// easyautoloop walks our test context through the process of triggering our +// easy autoloop functionality, providing mocked values as required. The number +// of values needed to mock easy autoloop are less than standard autoloop as the +// goal of easy autoloop is to simplify its usage. +func (c *autoloopTestCtx) easyautoloop(step *easyAutoloopStep, noop bool) { + // Tick our autoloop ticker to force assessing whether we want to loop. + c.manager.cfg.AutoloopTicker.Force <- testTime + + // Provide the liquidity manager with our desired existing set of swaps. + c.loopOuts <- step.existingOut + c.loopIns <- step.existingIn + + // If easy autoloop is not meant to be triggered we skip sending the + // mock response for restrictions, as this is never called. + if !noop { + // Send a mocked response from the server with the swap size limits. + c.loopOutRestrictions <- NewRestrictions(step.minAmt, step.maxAmt) + } + + for _, expected := range step.quotesOut { + request := <-c.quoteRequest + require.Equal( + c.t, expected.request.Amount, request.Amount, + ) + + c.quotes <- expected.quote + } + + for _, expected := range step.expectedOut { + actual := <-c.outRequest + + require.Equal(c.t, expected.request.Amount, actual.Amount) + require.Equal( + c.t, expected.request.OutgoingChanSet, + actual.OutgoingChanSet, + ) + } } // matchLoopOuts checks that the actual loop out requests we got match the From 5edc39dff330478399ffc58f563627053a592dc3 Mon Sep 17 00:00:00 2001 From: George Tsagkarelis Date: Mon, 22 May 2023 15:27:45 +0300 Subject: [PATCH 4/4] loop: update docs and release notes --- docs/autoloop.md | 18 ++++++++++++++++++ release_notes.md | 3 +++ 2 files changed, 21 insertions(+) diff --git a/docs/autoloop.md b/docs/autoloop.md index 0c40d37..1d7af90 100644 --- a/docs/autoloop.md +++ b/docs/autoloop.md @@ -9,6 +9,24 @@ following command: loop setparams --autoloop=true ``` +## Easy Autoloop + +If you don't want to bother with setting up specific rules for each of your +channels and peers you can use easy autoloop. This mode of autoloop requires +for you to set only the overall channel balance that you don't wish to exceed +on your lightning node. For example, if you want to keep your node's total +channel balance below 1 million satoshis you can set the following +``` +loop setparams --autoloop=true --easyautoloop=true --localbalancesat=1000000 +``` + +This will automatically start dispatching loop-outs whenever you exceed total +channel balance of 1M sats. Keep in mind that on first time use this will use +the default budget parameters. If you wish to configure a custom budget you can +find more info in the [Budget](#budget) section. + +## Liquidity Rules + At present, autoloop can be configured to either acquire incoming liquidity using loop out, or acquire outgoing liquidity using loop in. It cannot support automated swaps in both directions. To set the type of swaps you would like diff --git a/release_notes.md b/release_notes.md index c71d135..bfcde11 100644 --- a/release_notes.md +++ b/release_notes.md @@ -15,6 +15,9 @@ This file tracks release notes for the loop client. ## Next release #### New Features +- Easy Autoloop: a new mode for autoloop which requires the user to only set a + single target balance. Autoloop will start dispatching loop outs + whenever the total channel balance of the node exceeds that target. #### Breaking Changes