mitigate Block by future StartTime

models/forgefed/federationinfo.go

@@ -4,6 +4,7 @@
 package forgefed
 
 import (
+	"fmt"
 	"time"
 
 	"code.gitea.io/gitea/modules/timeutil"
@@ -39,6 +40,9 @@ func (info FederationInfo) Validate() []string {
 	result = append(result, validation.ValidateNotEmpty(info.HostFqdn, "HostFqdn")...)
 	result = append(result, validation.ValidateMaxLen(info.HostFqdn, 255, "HostFqdn")...)
 	result = append(result, info.NodeInfo.Validate()...)
+	if !info.LatestActivity.IsZero() && info.LatestActivity.After(time.Now().Add(10*time.Minute)) {
+		result = append(result, fmt.Sprintf("Latest Activity may not be far futurer: %v", info.LatestActivity))
+	}
 
 	return result
 }

models/forgefed/federationinfo_test.go

@@ -30,4 +30,15 @@ func Test_FederationInfoValidation(t *testing.T) {
 	if res, _ := validation.IsValid(sut); res {
 		t.Errorf("sut should be invalid")
 	}
+
+	sut = FederationInfo{
+		HostFqdn: "host.do.main",
+		NodeInfo: NodeInfo{
+			Source: "forgejo",
+		},
+		LatestActivity: time.Now().Add(1 * time.Hour),
+	}
+	if res, _ := validation.IsValid(sut); res {
+		t.Errorf("sut should be invalid")
+	}
 }