multi: Modernize interface{} with any.

cmd/gencerts/gencerts.go

@@ -27,7 +27,7 @@ import (
 	"golang.org/x/net/idna"
 )
 
-func fatalf(format string, args ...interface{}) {
+func fatalf(format string, args ...any) {
 	fmt.Fprintf(os.Stderr, format, args...)
 	os.Exit(1)
 }
@@ -74,7 +74,7 @@ func main() {
 	}
 	certname, keyname := args[0], args[1]
 
-	var keygen func() (pub, priv interface{})
+	var keygen func() (pub, priv any)
 	switch cfg.Algo {
 	case "P-256":
 		keygen = ecKeyGen(elliptic.P256())
@@ -136,7 +136,7 @@ func main() {
 		}
 	} else {
 		var ca *x509.Certificate
-		var caPriv interface{}
+		var caPriv any
 		tlsCert, err := tls.LoadX509KeyPair(cfg.CA, cfg.CAKey)
 		if err != nil {
 			fatalf("open CA keypair: %s\n", err)
@@ -177,15 +177,15 @@ func fileExists(name string) bool {
 	return true
 }
 
-func ed25519KeyGen() (pub, priv interface{}) {
+func ed25519KeyGen() (pub, priv any) {
 	seed := make([]byte, ed25519.SeedSize)
 	rand.Read(seed)
 	key := ed25519.NewKeyFromSeed(seed)
 	return key.Public(), key
 }
 
-func ecKeyGen(curve elliptic.Curve) func() (pub, priv interface{}) {
-	return func() (pub, priv interface{}) {
+func ecKeyGen(curve elliptic.Curve) func() (pub, priv any) {
+	return func() (pub, priv any) {
 		var key *ecdsa.PrivateKey
 		key, err := ecdsa.GenerateKey(curve, rand.Reader())
 		if err != nil {
@@ -195,8 +195,8 @@ func ecKeyGen(curve elliptic.Curve) func() (pub, priv interface{}) {
 	}
 }
 
-func rsaKeyGen(bits int) func() (pub, priv interface{}) {
-	return func() (pub, priv interface{}) {
+func rsaKeyGen(bits int) func() (pub, priv any) {
+	return func() (pub, priv any) {
 		var key *rsa.PrivateKey
 		key, err := rsa.GenerateKey(rand.Reader(), bits)
 		if err != nil {
@@ -282,7 +282,7 @@ func newTemplate(hosts []string, org string, validUntil time.Time) (*x509.Certif
 	return template, nil
 }
 
-func generateAuthority(pub, priv interface{}, hosts []string, org string,
+func generateAuthority(pub, priv any, hosts []string, org string,
 	years int, keyUsage x509.KeyUsage) (*certWithPEM, error) {
 
 	validUntil := time.Now().Add(time.Hour * 24 * 365 * time.Duration(years))
@@ -317,7 +317,7 @@ func generateAuthority(pub, priv interface{}, hosts []string, org string,
 	return ca, nil
 }
 
-func createIssuedCert(pub, caPriv interface{}, ca *x509.Certificate,
+func createIssuedCert(pub, caPriv any, ca *x509.Certificate,
 	hosts []string, org string, years int, keyUsage x509.KeyUsage) (*certWithPEM, error) {
 
 	if ca.KeyUsage&x509.KeyUsageCertSign == 0 {
@@ -357,7 +357,7 @@ func createIssuedCert(pub, caPriv interface{}, ca *x509.Certificate,
 	return issuedCert, nil
 }
 
-func marshalPrivateKey(key interface{}) ([]byte, error) {
+func marshalPrivateKey(key any) ([]byte, error) {
 	der, err := x509.MarshalPKCS8PrivateKey(key)
 	if err != nil {
 		return nil, fmt.Errorf("failed to marshal private key: %w", err)

internal/blockchain/chain.go

@@ -55,7 +55,7 @@ const (
 // panicf is a convenience function that formats according to the given format
 // specifier and arguments and then logs the result at the critical level and
 // panics with it.
-func panicf(format string, args ...interface{}) {
+func panicf(format string, args ...any) {
 	str := fmt.Sprintf(format, args...)
 	log.Critical(str)
 	panic(str)

internal/blockchain/error.go

@@ -825,7 +825,7 @@ func (e MultiError) Is(target error) bool {
 //
 // This means it keeps all of the same semantics typically provided by As in
 // terms of unwrapping error chains and setting the target to the matched error.
-func (e MultiError) As(target interface{}) bool {
+func (e MultiError) As(target any) bool {
 	for _, err := range e {
 		if errors.As(err, target) {
 			return true

internal/blockchain/notifications.go

@@ -174,13 +174,13 @@ type TicketNotificationsData struct {
 //   - NTNewTickets:            *TicketNotificationsData
 type Notification struct {
 	Type NotificationType
-	Data interface{}
+	Data any
 }
 
 // sendNotification sends a notification with the passed type and data if the
 // caller requested notifications by providing a callback function in the call
 // to New.
-func (b *BlockChain) sendNotification(typ NotificationType, data interface{}) {
+func (b *BlockChain) sendNotification(typ NotificationType, data any) {
 	// Ignore it if the caller didn't request notifications.
 	if b.notifications == nil {
 		return

internal/blockchain/utxoio.go

@@ -75,7 +75,7 @@ var utxoSetDbPrefixSize = len(utxoPrefixUtxoSet)
 // outpointKeyPool defines a concurrent safe free list of byte slices used to
 // provide temporary buffers for outpoint database keys.
 var outpointKeyPool = sync.Pool{
-	New: func() interface{} {
+	New: func() any {
 		b := make([]byte, utxoSetDbPrefixSize+chainhash.HashSize+
 			maxUint8VLQSerializeSize+maxUint32VLQSerializeSize)
 		return &b // Pointer to slice to avoid boxing alloc.

internal/mining/bgblktmplgenerator.go

@@ -127,7 +127,7 @@ type templateUpdate struct {
 //   - rtTemplateUpdated:   templateUpdate
 type regenEvent struct {
 	reason regenEventType
-	value  interface{}
+	value  any
 }
 
 // waitGroup behaves simlarly to a sync.WaitGroup without the restriction that

internal/mining/txpriorityqueue.go

@@ -55,13 +55,13 @@ func (pq *txPriorityQueue) Swap(i, j int) {
 
 // Push pushes the passed item onto the priority queue.  It is part of the
 // heap.Interface implementation.
-func (pq *txPriorityQueue) Push(x interface{}) {
+func (pq *txPriorityQueue) Push(x any) {
 	pq.items = append(pq.items, x.(*txPrioItem))
 }
 
 // Pop removes the highest priority item (according to Less) from the priority
 // queue and returns it.  It is part of the heap.Interface implementation.
-func (pq *txPriorityQueue) Pop() interface{} {
+func (pq *txPriorityQueue) Pop() any {
 	n := len(pq.items)
 	item := pq.items[n-1]
 	pq.items[n-1] = nil

internal/rpcserver/interface.go

@@ -157,7 +157,7 @@ type ConnManager interface {
 	// AddRebroadcastInventory adds the provided inventory to the list of
 	// inventories to be rebroadcast at random intervals until they show up
 	// in a block.
-	AddRebroadcastInventory(iv *wire.InvVect, data interface{})
+	AddRebroadcastInventory(iv *wire.InvVect, data any)
 
 	// RelayTransactions generates and relays inventory vectors for all of
 	// the passed transactions to all connected peers.