fsm: generate and verify static address diagrams

.github/workflows/main.yml

@@ -124,6 +124,9 @@ jobs:
       - name: check
         run: make docs-check
 
+      - name: check generated FSM diagrams
+        run: make fsm-check
+
   ########################
   # run unit-test sqlite3 race
   ########################

Makefile

@@ -194,4 +194,20 @@ docs-check: docs
 fsm:
 	@$(call print, "Generating state machine docs")
 	./scripts/fsm-generate.sh;
-.PHONY: fsm
+
+FSM_FILES := \
+	fsm/example_fsm.md \
+	instantout/fsm.md \
+	instantout/reservation/fsm.md \
+	staticaddr/deposit/fsm.md \
+	staticaddr/loopin/fsm.md
+
+fsm-check: fsm
+	@$(call print, "Verifying generated state machine docs")
+	if test -n "$$(git status --porcelain -- $(FSM_FILES))"; then \
+		echo "Generated FSM diagrams are not up-to-date!"; \
+		git status --porcelain -- $(FSM_FILES); \
+		git diff -- $(FSM_FILES); \
+		exit 1; \
+	fi
+.PHONY: fsm fsm-check

fsm/example_fsm.md

@@ -2,11 +2,11 @@
 stateDiagram-v2
 [*] --> InitFSM: OnRequestStuff
 InitFSM
-InitFSM --> StuffSentOut: OnStuffSentOut
 InitFSM --> StuffFailed: OnError
+InitFSM --> StuffSentOut: OnStuffSentOut
 StuffFailed
 StuffSentOut
-StuffSentOut --> StuffSuccess: OnStuffSuccess
 StuffSentOut --> StuffFailed: OnError
+StuffSentOut --> StuffSuccess: OnStuffSuccess
 StuffSuccess
 ```

fsm/stateparser/stateparser.go

@@ -12,8 +12,12 @@ import (
 	"github.com/lightninglabs/loop/fsm"
 	"github.com/lightninglabs/loop/instantout"
 	"github.com/lightninglabs/loop/instantout/reservation"
+	"github.com/lightninglabs/loop/staticaddr/deposit"
+	"github.com/lightninglabs/loop/staticaddr/loopin"
 )
 
+var errInvalidFSMSelector = errors.New("missing or unknown fsm selector")
+
 func main() {
 	if err := run(); err != nil {
 		fmt.Println(err)
@@ -35,35 +39,43 @@ func run() error {
 		return err
 	}
 
-	switch *stateMachine {
+	states, err := getStates(*stateMachine)
+	if err != nil {
+		return err
+	}
+
+	return writeMermaidFile(fp, states)
+}
+
+func getStates(stateMachine string) (fsm.States, error) {
+	switch stateMachine {
 	case "example":
 		exampleFSM := &fsm.ExampleFSM{}
-		err = writeMermaidFile(fp, exampleFSM.GetStates())
-		if err != nil {
-			return err
-		}
+		return exampleFSM.GetStates(), nil
 
 	case "reservation":
 		reservationFSM := &reservation.FSM{}
-		err = writeMermaidFile(fp, reservationFSM.GetServerInitiatedReservationStates())
-		if err != nil {
-			return err
-		}
+		return reservationFSM.GetServerInitiatedReservationStates(), nil
 
 	case "instantout":
-		instantout := &instantout.FSM{}
-		err = writeMermaidFile(fp, instantout.GetV1ReservationStates())
-		if err != nil {
-			return err
-		}
+		instantOutFSM := &instantout.FSM{}
+		return instantOutFSM.GetV1ReservationStates(), nil
+
+	case "staticaddr-deposit":
+		depositFSM := &deposit.FSM{}
+		return depositFSM.DepositStatesV0(), nil
+
+	case "staticaddr-loopin":
+		loopInFSM := &loopin.FSM{}
+		return loopInFSM.LoopInStatesV0(), nil
 
 	default:
-		fmt.Println("Missing or wrong argument: fsm must be one of:")
-		fmt.Println("\treservations")
-		fmt.Println("\texample")
+		return nil, fmt.Errorf(
+			"%w %q; supported selectors: example, instantout, "+
+				"reservation, staticaddr-deposit, staticaddr-loopin",
+			errInvalidFSMSelector, stateMachine,
+		)
 	}
-
-	return nil
 }
 
 func writeMermaidFile(filename string, states fsm.States) error {
@@ -86,8 +98,11 @@ func writeMermaidFile(filename string, states fsm.States) error {
 			state = "[*]"
 		}
 		// write transitions
-		for edge, target := range edges.Transitions {
-			fmt.Fprintf(&b, "%s --> %s: %s\n", state, target, edge)
+		for _, edge := range sortedTransitionKeys(edges.Transitions) {
+			fmt.Fprintf(
+				&b, "%s --> %s: %s\n", state,
+				edges.Transitions[fsm.EventType(edge)], edge,
+			)
 		}
 	}
 
@@ -110,3 +125,14 @@ func sortedKeys(m fsm.States) []string {
 	sort.Strings(keys)
 	return keys
 }
+
+func sortedTransitionKeys(m fsm.Transitions) []string {
+	keys := make([]string, len(m))
+	i := 0
+	for k := range m {
+		keys[i] = string(k)
+		i++
+	}
+	sort.Strings(keys)
+	return keys
+}

instantout/fsm.md

@@ -2,35 +2,41 @@
 stateDiagram-v2
 [*] --> Init: OnStart
 BuildHtlc
+BuildHtlc --> InstantOutFailed: OnError
 BuildHtlc --> PushPreimage: OnHtlcSigReceived
-BuildHtlc --> InstantFailedOutFailed: OnError
-BuildHtlc --> InstantFailedOutFailed: OnRecover
+BuildHtlc --> InstantOutFailed: OnRecover
 FailedHtlcSweep
+FailedHtlcSweep --> PublishHtlcSweep: OnRecover
+FinishedHtlcPreimageSweep
 FinishedSweeplessSweep
 Init
+Init --> InstantOutFailed: OnError
 Init --> SendPaymentAndPollAccepted: OnInit
-Init --> InstantFailedOutFailed: OnError
-Init --> InstantFailedOutFailed: OnRecover
-InstantFailedOutFailed
+Init --> InstantOutFailed: OnRecover
+InstantOutFailed
 PublishHtlc
 PublishHtlc --> FailedHtlcSweep: OnError
+PublishHtlc --> PublishHtlcSweep: OnHtlcPublished
 PublishHtlc --> PublishHtlc: OnRecover
-PublishHtlc --> WaitForHtlcSweepConfirmed: OnHtlcBroadcasted
+PublishHtlcSweep
+PublishHtlcSweep --> FailedHtlcSweep: OnError
+PublishHtlcSweep --> WaitForHtlcSweepConfirmed: OnHtlcSweepPublished
+PublishHtlcSweep --> PublishHtlcSweep: OnRecover
 PushPreimage
+PushPreimage --> InstantOutFailed: OnError
+PushPreimage --> PublishHtlc: OnErrorPublishHtlc
 PushPreimage --> PushPreimage: OnRecover
 PushPreimage --> WaitForSweeplessSweepConfirmed: OnSweeplessSweepPublished
-PushPreimage --> InstantFailedOutFailed: OnError
-PushPreimage --> PublishHtlc: OnErrorPublishHtlc
 SendPaymentAndPollAccepted
+SendPaymentAndPollAccepted --> InstantOutFailed: OnError
 SendPaymentAndPollAccepted --> BuildHtlc: OnPaymentAccepted
-SendPaymentAndPollAccepted --> InstantFailedOutFailed: OnError
-SendPaymentAndPollAccepted --> InstantFailedOutFailed: OnRecover
+SendPaymentAndPollAccepted --> InstantOutFailed: OnRecover
 WaitForHtlcSweepConfirmed
+WaitForHtlcSweepConfirmed --> FailedHtlcSweep: OnError
 WaitForHtlcSweepConfirmed --> FinishedHtlcPreimageSweep: OnHtlcSwept
 WaitForHtlcSweepConfirmed --> WaitForHtlcSweepConfirmed: OnRecover
-WaitForHtlcSweepConfirmed --> FailedHtlcSweep: OnError
 WaitForSweeplessSweepConfirmed
-WaitForSweeplessSweepConfirmed --> FinishedSweeplessSweep: OnSweeplessSweepConfirmed
-WaitForSweeplessSweepConfirmed --> WaitForSweeplessSweepConfirmed: OnRecover
 WaitForSweeplessSweepConfirmed --> PublishHtlc: OnError
+WaitForSweeplessSweepConfirmed --> WaitForSweeplessSweepConfirmed: OnRecover
+WaitForSweeplessSweepConfirmed --> FinishedSweeplessSweep: OnSweeplessSweepConfirmed
 ```

instantout/reservation/reservation_fsm.md → instantout/reservation/fsm.md

@@ -2,20 +2,28 @@
 stateDiagram-v2
 [*] --> Init: OnServerRequest
 Confirmed
-Confirmed --> SpendBroadcasted: OnSpendBroadcasted
-Confirmed --> TimedOut: OnTimedOut
+Confirmed --> Confirmed: OnError
+Confirmed --> Locked: OnLocked
 Confirmed --> Confirmed: OnRecover
+Confirmed --> Spent: OnSpent
+Confirmed --> TimedOut: OnTimedOut
 Failed
 Init
 Init --> WaitForConfirmation: OnBroadcast
-Init --> Failed: OnRecover
 Init --> Failed: OnError
-SpendBroadcasted
-SpendBroadcasted --> SpendConfirmed: OnSpendConfirmed
-SpendConfirmed
+Init --> Failed: OnRecover
+Locked
+Locked --> Locked: OnError
+Locked --> Locked: OnRecover
+Locked --> Spent: OnSpent
+Locked --> TimedOut: OnTimedOut
+Locked --> Confirmed: OnUnlocked
+Spent
+Spent --> Spent: OnSpent
 TimedOut
+TimedOut --> TimedOut: OnTimedOut
 WaitForConfirmation
-WaitForConfirmation --> WaitForConfirmation: OnRecover
 WaitForConfirmation --> Confirmed: OnConfirmed
+WaitForConfirmation --> WaitForConfirmation: OnRecover
 WaitForConfirmation --> TimedOut: OnTimedOut
 ```

scripts/fsm-generate.sh

@@ -1,4 +1,8 @@
 #!/usr/bin/env bash
+set -euo pipefail
+
 go run ./fsm/stateparser/stateparser.go --out ./fsm/example_fsm.md --fsm example
-go run ./fsm/stateparser/stateparser.go --out ./reservation/reservation_fsm.md --fsm reservation
-go run ./fsm/stateparser/stateparser.go --out ./instantout/fsm.md --fsm instantout
+go run ./fsm/stateparser/stateparser.go --out ./instantout/reservation/fsm.md --fsm reservation
+go run ./fsm/stateparser/stateparser.go --out ./instantout/fsm.md --fsm instantout
+go run ./fsm/stateparser/stateparser.go --out ./staticaddr/deposit/fsm.md --fsm staticaddr-deposit
+go run ./fsm/stateparser/stateparser.go --out ./staticaddr/loopin/fsm.md --fsm staticaddr-loopin

staticaddr/deposit/fsm.md

@@ -0,0 +1,52 @@
+```mermaid
+stateDiagram-v2
+[*] --> Deposited: OnStart
+ChannelPublished
+ChannelPublished --> ChannelPublished: OnExpiry
+Deposited
+Deposited --> Deposited: OnError
+Deposited --> PublishExpirySweep: OnExpiry
+Deposited --> LoopingIn: OnLoopInInitiated
+Deposited --> OpeningChannel: OnOpeningChannel
+Deposited --> Deposited: OnRecover
+Deposited --> SweepHtlcTimeout: OnSweepingHtlcTimeout
+Deposited --> Withdrawing: OnWithdrawInitiated
+Expired
+Expired --> Expired: OnExpiry
+HtlcTimeoutSwept
+HtlcTimeoutSwept --> HtlcTimeoutSwept: OnExpiry
+LoopedIn
+LoopedIn --> LoopedIn: OnExpiry
+LoopingIn
+LoopingIn --> Deposited: OnError
+LoopingIn --> PublishExpirySweep: OnExpiry
+LoopingIn --> LoopingIn: OnLoopInInitiated
+LoopingIn --> LoopedIn: OnLoopedIn
+LoopingIn --> LoopingIn: OnRecover
+LoopingIn --> SweepHtlcTimeout: OnSweepingHtlcTimeout
+OpeningChannel
+OpeningChannel --> ChannelPublished: OnChannelPublished
+OpeningChannel --> Deposited: OnError
+OpeningChannel --> OpeningChannel: OnExpiry
+OpeningChannel --> OpeningChannel: OnRecover
+PublishExpirySweep
+PublishExpirySweep --> Deposited: OnError
+PublishExpirySweep --> WaitForExpirySweep: OnExpiryPublished
+PublishExpirySweep --> PublishExpirySweep: OnRecover
+SweepHtlcTimeout
+SweepHtlcTimeout --> HtlcTimeoutSwept: OnHtlcTimeoutSwept
+SweepHtlcTimeout --> SweepHtlcTimeout: OnRecover
+WaitForExpirySweep
+WaitForExpirySweep --> Deposited: OnError
+WaitForExpirySweep --> Expired: OnExpirySwept
+WaitForExpirySweep --> PublishExpirySweep: OnRecover
+Withdrawing
+Withdrawing --> Deposited: OnError
+Withdrawing --> Withdrawing: OnExpiry
+Withdrawing --> Withdrawing: OnRecover
+Withdrawing --> Withdrawing: OnWithdrawInitiated
+Withdrawing --> Withdrawn: OnWithdrawn
+Withdrawn
+Withdrawn --> Withdrawn: OnExpiry
+Withdrawn --> Withdrawn: OnWithdrawn
+```

staticaddr/loopin/fsm.md

@@ -0,0 +1,37 @@
+```mermaid
+stateDiagram-v2
+[*] --> InitHtlcTx: OnInitHtlc
+Failed
+HtlcTimeoutSwept
+InitHtlcTx
+InitHtlcTx --> UnlockDeposits: OnError
+InitHtlcTx --> SignHtlcTx: OnHtlcInitiated
+InitHtlcTx --> UnlockDeposits: OnRecover
+MonitorHtlcTimeoutSweep
+MonitorHtlcTimeoutSweep --> Failed: OnError
+MonitorHtlcTimeoutSweep --> HtlcTimeoutSwept: OnHtlcTimeoutSwept
+MonitorHtlcTimeoutSweep --> MonitorHtlcTimeoutSweep: OnRecover
+MonitorInvoiceAndHtlcTx
+MonitorInvoiceAndHtlcTx --> UnlockDeposits: OnError
+MonitorInvoiceAndHtlcTx --> PaymentReceived: OnPaymentReceived
+MonitorInvoiceAndHtlcTx --> MonitorInvoiceAndHtlcTx: OnRecover
+MonitorInvoiceAndHtlcTx --> Failed: OnSwapTimedOut
+MonitorInvoiceAndHtlcTx --> SweepHtlcTimeout: OnSweepHtlcTimeout
+PaymentReceived
+PaymentReceived --> SucceededTransitioningFailed: OnError
+PaymentReceived --> Succeeded: OnRecover
+PaymentReceived --> Succeeded: OnSucceeded
+SignHtlcTx
+SignHtlcTx --> UnlockDeposits: OnError
+SignHtlcTx --> MonitorInvoiceAndHtlcTx: OnHtlcTxSigned
+SignHtlcTx --> UnlockDeposits: OnRecover
+Succeeded
+SucceededTransitioningFailed
+SweepHtlcTimeout
+SweepHtlcTimeout --> Failed: OnError
+SweepHtlcTimeout --> MonitorHtlcTimeoutSweep: OnHtlcTimeoutSweepPublished
+SweepHtlcTimeout --> SweepHtlcTimeout: OnRecover
+UnlockDeposits
+UnlockDeposits --> Failed: OnError
+UnlockDeposits --> UnlockDeposits: OnRecover
+```