Update application registry when chains change.

internal/apps_registry/cached_app_registry.go

@@ -171,12 +171,22 @@ func arePoktApplicationSignersEqual(slice1, slice2 []*models.PoktApplicationSign
 		return sortedSlice2[i].NetworkApp.Address < sortedSlice2[j].NetworkApp.Address
 	})
 
-	// Now that slices are sorted, check if address keys are same.
+	// Now that slices are sorted, check if address keys and chains are same.
 	for i := range slice1 {
-		// Check if any field is different
-		if !strings.EqualFold(sortedSlice1[i].NetworkApp.Address, sortedSlice2[i].NetworkApp.Address) {
+
+		networkApp1 := sortedSlice1[i].NetworkApp
+		networkApp2 := sortedSlice2[i].NetworkApp
+
+		// If address are not same, gateway operator added or remove some application
+		if !strings.EqualFold(networkApp1.Address, networkApp2.Address) {
+			return false
+		}
+
+		// Gateway operator may have updated chains staked
+		if !strings.EqualFold(strings.Join(networkApp1.Chains, ","), strings.Join(networkApp2.Chains, ",")) {
 			return false
 		}
+
 	}
 
 	// Slices are equal

internal/apps_registry/cached_app_registry_test.go

@@ -0,0 +1,101 @@
+package apps_registry
+
+import (
+	"github.com/pokt-network/gateway-server/internal/apps_registry/models"
+	pokt_models "github.com/pokt-network/gateway-server/pkg/pokt/pokt_v0/models"
+	"testing"
+)
+
+func Test_arePoktApplicationSignersEqual(t *testing.T) {
+	type args struct {
+		slice1 []*models.PoktApplicationSigner
+		slice2 []*models.PoktApplicationSigner
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "different length",
+			args: args{
+				slice1: []*models.PoktApplicationSigner{},
+				slice2: []*models.PoktApplicationSigner{{NetworkApp: &pokt_models.PoktApplication{
+					Address:   "123",
+					Chains:    []string{"123", "123"},
+					PublicKey: "",
+					Status:    0,
+					MaxRelays: 0,
+				}}},
+			},
+			want: false,
+		},
+		{
+			name: "different address",
+			args: args{
+				slice1: []*models.PoktApplicationSigner{{NetworkApp: &pokt_models.PoktApplication{
+					Address:   "1234",
+					Chains:    []string{"123", "123"},
+					PublicKey: "",
+					Status:    0,
+					MaxRelays: 0,
+				}}},
+				slice2: []*models.PoktApplicationSigner{{NetworkApp: &pokt_models.PoktApplication{
+					Address:   "123",
+					Chains:    []string{"123", "123"},
+					PublicKey: "",
+					Status:    0,
+					MaxRelays: 0,
+				}}},
+			},
+			want: false,
+		},
+		{
+			name: "different chains",
+			args: args{
+				slice1: []*models.PoktApplicationSigner{{NetworkApp: &pokt_models.PoktApplication{
+					Address:   "1234",
+					Chains:    []string{"123", "123"},
+					PublicKey: "",
+					Status:    0,
+					MaxRelays: 0,
+				}}},
+				slice2: []*models.PoktApplicationSigner{{NetworkApp: &pokt_models.PoktApplication{
+					Address:   "123",
+					Chains:    []string{"123"},
+					PublicKey: "",
+					Status:    0,
+					MaxRelays: 0,
+				}}},
+			},
+			want: false,
+		},
+		{
+			name: "same apps",
+			args: args{
+				slice1: []*models.PoktApplicationSigner{{NetworkApp: &pokt_models.PoktApplication{
+					Address:   "123",
+					Chains:    []string{"123", "123"},
+					PublicKey: "",
+					Status:    0,
+					MaxRelays: 0,
+				}}},
+				slice2: []*models.PoktApplicationSigner{{NetworkApp: &pokt_models.PoktApplication{
+					Address:   "123",
+					Chains:    []string{"123", "123"},
+					PublicKey: "",
+					Status:    0,
+					MaxRelays: 0,
+				}}},
+			},
+			want: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := arePoktApplicationSignersEqual(tt.args.slice1, tt.args.slice2); got != tt.want {
+				t.Errorf("arePoktApplicationSignersEqual() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}