refactor: replace golang.org/x/exp/maps with std lib maps pkg

This replaces all uses of golang.org/x/exp/maps and refactors code
that sorts keys of a map.

cmd/latencygen/latency_gen.go

@@ -7,12 +7,11 @@ import (
 	"fmt"
 	"go/format"
 	"log"
+	"maps"
 	"os"
-	"sort"
+	"slices"
 	"strings"
 	"time"
-
-	"golang.org/x/exp/maps"
 )
 
 // Run go generate from this directory to generate the latency matrix.
@@ -30,8 +29,7 @@ func main() {
 	if err := json.Unmarshal([]byte(latencyMatrix), &allToAllMatrix); err != nil {
 		log.Fatal(err)
 	}
-	keys := maps.Keys(allToAllMatrix)
-	sort.Strings(keys)
+	keys := slices.Sorted(maps.Keys(allToAllMatrix))
 
 	s := strings.Builder{}
 	s.WriteString(`package backend

crypto/cache.go

@@ -3,13 +3,13 @@ package crypto
 import (
 	"container/list"
 	"crypto/sha256"
+	"maps"
 	"slices"
 	"strings"
 	"sync"
 
 	"github.com/relab/hotstuff"
 	"github.com/relab/hotstuff/modules"
-	"golang.org/x/exp/maps"
 )
 
 type cache struct {
@@ -106,8 +106,7 @@ func (cache *cache) Verify(signature hotstuff.QuorumSignature, message []byte) b
 // BatchVerify verifies the given quorum signature against the batch of messages.
 func (cache *cache) BatchVerify(signature hotstuff.QuorumSignature, batch map[hotstuff.ID][]byte) bool {
 	// sort the list of ids from the batch map
-	ids := maps.Keys(batch)
-	slices.Sort(ids)
+	ids := slices.Sorted(maps.Keys(batch))
 	var hash hotstuff.Hash
 	hasher := sha256.New()
 	// then hash the messages in sorted order

go.mod

@@ -17,7 +17,6 @@ require (
 	github.com/spf13/viper v1.19.0
 	go-hep.org/x/hep v0.36.0
 	go.uber.org/zap v1.27.0
-	golang.org/x/exp v0.0.0-20241217172543-b2144cdd0a67
 	golang.org/x/time v0.8.0
 	gonum.org/v1/plot v0.15.0
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20241216192217-9240e9c98484
@@ -76,6 +75,7 @@ require (
 	go.opentelemetry.io/otel/trace v1.33.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/crypto v0.31.0 // indirect
+	golang.org/x/exp v0.0.0-20241217172543-b2144cdd0a67 // indirect
 	golang.org/x/image v0.23.0 // indirect
 	golang.org/x/mod v0.22.0 // indirect
 	golang.org/x/net v0.32.0 // indirect

twins/network.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"maps"
 	"reflect"
 	"slices"
 	"strings"
@@ -19,7 +20,6 @@ import (
 	"github.com/relab/hotstuff/logging"
 	"github.com/relab/hotstuff/modules"
 	"github.com/relab/hotstuff/synchronizer"
-	"golang.org/x/exp/maps"
 )
 
 // NodeID is an ID that is unique to a node in the network.
@@ -403,8 +403,7 @@ func (s NodeSet) Contains(v uint32) bool {
 
 // MarshalJSON returns a JSON representation of the node set.
 func (s NodeSet) MarshalJSON() ([]byte, error) {
-	ids := maps.Keys(s)
-	slices.Sort(ids)
+	ids := slices.Sorted(maps.Keys(s))
 	return json.Marshal(ids)
 }