Fix removal of maps.Keys in go1.21rc4

cmd/api/api.go

@@ -21,7 +21,6 @@ import (
 	"github.com/gorilla/mux"
 	"io"
 	"log"
-	"maps"
 	"math"
 	"net/http"
 	_ "net/http/pprof"
@@ -1556,7 +1555,7 @@ func main() {
 							}
 						}
 
-						sortedAddresses := maps.Keys(addresses)
+						sortedAddresses := utils.Keys(addresses)
 
 						//Sort based on addresses
 						slices.SortFunc(sortedAddresses, func(a address.PackedAddress, b address.PackedAddress) int {

cmd/web/web.go

@@ -18,7 +18,6 @@ import (
 	"github.com/valyala/quicktemplate"
 	"io"
 	"log"
-	"maps"
 	"math"
 	"net/http"
 	_ "net/http/pprof"
@@ -722,7 +721,7 @@ func main() {
 			}
 		}
 
-		minerKeys := maps.Keys(miners)
+		minerKeys := utils.Keys(miners)
 		slices.SortFunc(minerKeys, func(a uint64, b uint64) int {
 			return miners[a].Weight.Cmp(miners[b].Weight) * -1
 		})

utils/maps.go

@@ -0,0 +1,9 @@
+package utils
+
+func Keys[M ~map[K]V, K comparable, V any](m M) []K {
+	r := make([]K, 0, len(m))
+	for k := range m {
+		r = append(r, k)
+	}
+	return r
+}