config: replace LatestHardfork() with HFLatestStable

Function doesn't make much sense here. The change is rather trivial and this
is not expected to be used by external code, so no deprecation.

Signed-off-by: Roman Khimov <roman@nspcc.ru>

pkg/compiler/native_test.go

@@ -310,7 +310,7 @@ func getMethod(t *testing.T, ctr interop.ContractMD, name string, params []strin
 		name = strings.TrimSuffix(name, "WithData")
 	}
 
-	latestHF := config.LatestHardfork()
+	latestHF := config.HFLatestKnown
 	cMD := ctr.HFSpecificContractMD(&latestHF)
 	md, ok := cMD.GetMethod(name, paramLen)
 	require.True(t, ok, cMD.Manifest.Name, name, paramLen)

pkg/config/hardfork.go

@@ -57,6 +57,9 @@ const (
 // between releases even if the set of known hardforks is the same.
 const HFLatestStable = HFDomovoi
 
+// HFLatestKnown is the latest known hardfork.
+const HFLatestKnown = hfLast >> 1
+
 // StableHardforks is an ordered slice of all stable hardforks (before or
 // equal [HFLatestStable]).
 var StableHardforks []Hardfork
@@ -110,8 +113,3 @@ func IsHardforkValid(s string) bool {
 	_, ok := hardforks[s]
 	return ok
 }
-
-// LatestHardfork returns latest known hardfork.
-func LatestHardfork() Hardfork {
-	return hfLast >> 1
-}

pkg/core/native/compatibility_test.go

@@ -12,7 +12,7 @@ import (
 func TestNamesASCII(t *testing.T) {
 	cfg := config.ProtocolConfiguration{P2PSigExtensions: true}
 	cs := NewContracts(cfg)
-	latestHF := config.LatestHardfork()
+	latestHF := config.HFLatestKnown
 	for _, c := range cs.Contracts {
 		require.True(t, isASCII(c.Metadata().Name))
 		hfMD := c.Metadata().HFSpecificContractMD(&latestHF)

pkg/core/native/contract_test.go

@@ -12,7 +12,7 @@ import (
 func TestNativeGetMethod(t *testing.T) {
 	cfg := config.ProtocolConfiguration{P2PSigExtensions: true}
 	cs := NewContracts(cfg)
-	latestHF := config.LatestHardfork()
+	latestHF := config.HFLatestKnown
 	for _, c := range cs.Contracts {
 		hfMD := c.Metadata().HFSpecificContractMD(&latestHF)
 		t.Run(c.Metadata().Name, func(t *testing.T) {