gomod: update to Go 1.24.6 and golangci-lint v2

.github/workflows/main.yml

@@ -20,7 +20,7 @@ env:
 
   # If you change this value, please change it in the following files as well:
   # /Dockerfile
-  GO_VERSION: 1.24.0
+  GO_VERSION: 1.24.6
 
 jobs:
   ########################

.golangci.yml

@@ -1,149 +1,131 @@
+version: "2"
 run:
+  go: "1.24"
+
   # timeout for analysis
   timeout: 4m
-
-  go: "1.23"
-
-linters-settings:
-  govet:
-    # Don't report about shadowed variables
-    shadowing: false
-
-  gofmt:
-    # simplify code: gofmt with `-s` option, true by default
-    simplify: true
-
-  tagliatelle:
-    case:
-      rules:
-        json: snake
-
-  whitespace:
-    multi-func: true
-    multi-if: true
-
-  gosec:
-    excludes:
-      - G402 # Look for bad TLS connection settings.
-      - G306 # Poor file permissions used when writing to a new file.
-      - G115 # Integer overflow conversion.
-
-  staticcheck:
-    checks: [ "-SA1019" ]
 
 linters:
-  enable-all: true
+  default: all
   disable:
-    # Global variables are used in many places throughout the code base.
-    - gochecknoglobals
-
-    # Some lines are over 80 characters on purpose and we don't want to make them
-    # even longer by marking them as 'nolint'.
-    - lll
-
-    # We want to allow short variable names.
-    - varnamelen
-
-    # We want to allow TODOs.
-    - godox
-
-    # We have long functions, especially in tests. Moving or renaming those would
-    # trigger funlen problems that we may not want to solve at that time.
-    - funlen
-
-    # Disable for now as we haven't yet tuned the sensitivity to our codebase
-    # yet. Enabling by default for example, would also force new contributors to
-    # potentially extensively refactor code, when they want to smaller change to
-    # land.
-    - gocyclo
-    - gocognit
+    - containedctx
+    - contextcheck
     - cyclop
-
-    # Instances of table driven tests that don't pre-allocate shouldn't trigger
-    # the linter.
-    - prealloc
-
-    # Init functions are used by loggers throughout the codebase.
-    - gochecknoinits
-
-    # Causes stack overflow, see https://github.com/polyfloyd/go-errorlint/issues/19.
+    - depguard
+    - dogsled
+    - err113
+    - errname
     - errorlint
-
-    # New linters that need a code adjustment first.
-    - wrapcheck
-    - nolintlint
-    - paralleltest
-    - tparallel
-    - testpackage
-    - gofumpt
+    - exhaustive
+    - exhaustruct
+    - forcetypeassert
+    - funlen
+    - gochecknoglobals
+    - gochecknoinits
+    - gocognit
+    - gocyclo
+    - godox
     - gomoddirectives
+    - inamedparam
+    - interfacebloat
+    - intrange
     - ireturn
     - maintidx
-    - nlreturn
-    - dogsled
-    - gci
-    - containedctx
-    - contextcheck
-    - errname
-    - err113
     - mnd
-    - noctx
     - nestif
-    - wsl
-    - exhaustive
-    - forcetypeassert
     - nilerr
     - nilnil
-    - stylecheck
-    - thelper
-    - revive
-    - tagalign
-    - depguard
-    - interfacebloat
-    - inamedparam
-    - intrange
+    - nlreturn
+    - noctx
+    - nolintlint
+    - paralleltest
     - perfsprint
+    - prealloc
     - protogetter
+    - revive
+    - tagalign
     - testifylint
-
-    # Additions compared to LND
-    - exhaustruct
-
+    - testpackage
+    - thelper
+    - tparallel
+    - varnamelen
+    - wrapcheck
+    - wsl
+    - funcorder
+    - wsl_v5
+    - noinlineerr
+  settings:
+    gosec:
+      excludes:
+        - G402
+        - G306
+        - G115
+    staticcheck:
+      checks:
+        - -SA1019
+    tagliatelle:
+      case:
+        rules:
+          json: snake
+    whitespace:
+      multi-if: true
+      multi-func: true
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    rules:
+      - linters:
+          - forbidigo
+          - gosec
+          - unparam
+        path: _test\.go
+      - linters:
+          - gosec
+        path: _mock\.go
+      - linters:
+          - errcheck
+          - forbidigo
+        path: cmd/loopd/*
+      - linters:
+          - forbidigo
+        path: loopd/*
+      - linters:
+          - errcheck
+          - forbidigo
+        path: cmd/loop/*
+      - linters:
+          - forbidigo
+        path: fsm/stateparser/*
+      - linters:
+          - lll
+        path: loopd/config.go
+      - linters:
+          - lll
+        path: loopdb/*
+    paths:
+      - \.pb\.go$
+      - \.pb\.gw\.go$
+      - third_party$
+      - builtin$
+      - examples$
 issues:
-  # Only show newly introduced problems.
   new-from-rev: 36838cf7f464cf73b0201798063b2caffeae4250
-
-  exclude-files:
-    - "\\.pb\\.go$"
-    - "\\.pb\\.gw\\.go$"
-
-  exclude-rules:
-    # Allow fmt.Printf() in test files
-    - path: _test\.go
-      linters:
-        - forbidigo
-        - unparam
-        - gosec
-    - path: _mock\.go
-      linters:
-        - gosec
-
-    # Allow fmt.Printf() in loopd
-    - path: cmd/loopd/*
-      linters:
-        - forbidigo
-        - errcheck
-    - path: loopd/*
-      linters:
-        - forbidigo
-
-    # Allow fmt.Printf() in loop
-    - path: cmd/loop/*
-      linters:
-        - forbidigo
-        - errcheck
-
-    # Allow fmt.Printf() in stateparser
-    - path: fsm/stateparser/*
-      linters:
-        - forbidigo
+formatters:
+  enable:
+    - gofmt
+    - goimports
+  settings:
+    gofmt:
+      simplify: true
+  exclusions:
+    generated: lax
+    paths:
+      - \.pb\.go$
+      - \.pb\.gw\.go$
+      - third_party$
+      - builtin$
+      - examples$

client.go

@@ -93,6 +93,8 @@ var (
 // Client performs the client side part of swaps. This interface exists to be
 // able to implement a stub.
 type Client struct {
+	clientConfig
+
 	started uint32 // To be used atomically.
 	errChan chan error
 
@@ -107,8 +109,6 @@ type Client struct {
 
 	resumeReady chan struct{}
 	wg          sync.WaitGroup
-
-	clientConfig
 }
 
 // ClientConfig is the exported configuration structure that is required to

cmd/loop/instantout.go

@@ -187,7 +187,6 @@ func instantOut(ctx *cli.Context) error {
 			DestAddr:        ctx.String("addr"),
 		},
 	)
-
 	if err != nil {
 		return err
 	}
@@ -228,5 +227,6 @@ func listInstantOuts(ctx *cli.Context) error {
 	}
 
 	printRespJSON(resp)
+
 	return nil
 }

cmd/loop/loopin.go

@@ -207,6 +207,7 @@ func loopIn(ctx *cli.Context) error {
 
 	fmt.Printf("Swap initiated\n")
 	fmt.Printf("ID:           %v\n", resp.Id)
+
 	if resp.HtlcAddressP2Tr != "" {
 		fmt.Printf("HTLC address (P2TR): %v\n", resp.HtlcAddressP2Tr)
 	} else {

cmd/loop/loopout.go

@@ -176,8 +176,10 @@ func loopOut(ctx *cli.Context) error {
 			"address to sweep the loop amount to")
 	}
 
-	var destAddr string
-	var account string
+	var (
+		destAddr string
+		account  string
+	)
 	switch {
 	case ctx.IsSet("addr"):
 		destAddr = ctx.String("addr")

cmd/loop/staticaddr.go

@@ -417,6 +417,7 @@ func utxosToOutpoints(utxos []string) ([]*looprpc.OutPoint, error) {
 	if len(utxos) == 0 {
 		return nil, fmt.Errorf("no utxos specified")
 	}
+
 	for _, utxo := range utxos {
 		outpoint, err := NewProtoOutPoint(utxo)
 		if err != nil {

cost_migration.go

@@ -25,7 +25,7 @@ func CalculateLoopOutCost(params *chaincfg.Params, loopOutSwap *loopdb.LoopOut,
 	paymentFees map[lntypes.Hash]lnwire.MilliSatoshi) (loopdb.SwapCost,
 	error) {
 
-	// First make sure that this swap is actually finished.
+	// First, make sure that this swap is actually finished.
 	if loopOutSwap.State().State.IsPending() {
 		return loopdb.SwapCost{}, fmt.Errorf("swap is not yet finished")
 	}
@@ -41,8 +41,8 @@ func CalculateLoopOutCost(params *chaincfg.Params, loopOutSwap *loopdb.LoopOut,
 	}
 
 	// The swap hash is given and we don't need to get it from the
-	// swap invoice, however we'll decode it anyway to get the invoice amount
-	// that was paid in case we don't have the payment anymore.
+	// swap invoice, however we'll decode it anyway to get the invoice
+	// amount that was paid in case we don't have the payment anymore.
 	_, _, swapHash, swapPaymentAmount, err := swap.DecodeInvoice(
 		params, loopOutSwap.Contract.SwapInvoice,
 	)
@@ -195,6 +195,6 @@ func MigrateLoopOutCosts(ctx context.Context, lnd lndclient.LndServices,
 		return err
 	}
 
-	// Finally mark the migration as done.
+	// Finally, mark the migration as done.
 	return db.SetMigration(ctx, costMigrationID)
 }

executor.go

@@ -42,17 +42,14 @@ type executorConfig struct {
 }
 
 // executor is responsible for executing swaps.
-//
-// TODO(roasbeef): rename to SubSwapper.
 type executor struct {
+	sync.Mutex
+	executorConfig
+
 	wg            sync.WaitGroup
 	newSwaps      chan genericSwap
 	currentHeight uint32
 	ready         chan struct{}
-
-	sync.Mutex
-
-	executorConfig
 }
 
 // newExecutor returns a new swap executor instance.
@@ -80,7 +77,6 @@ func (s *executor) run(mainCtx context.Context,
 	for {
 		blockEpochChan, blockErrorChan, err =
 			s.lnd.ChainNotifier.RegisterBlockEpochNtfn(mainCtx)
-
 		if err == nil {
 			break
 		}

fsm/fsm.go

@@ -138,7 +138,7 @@ func NewStateMachine(states States, observerSize int) *StateMachine {
 func NewStateMachineWithState(states States, current StateType,
 	observerSize int) *StateMachine {
 
-	observers := []Observer{}
+	var observers []Observer
 	var defaultObserver *CachedObserver
 
 	if observerSize > 0 {