shutter-service: upd random byte generator function

Author: faheelsattar

rolling-shutter/keyperimpl/shutterservice/handlers_test.go

@@ -178,7 +178,7 @@ func TestHandleDecryptionKeySharesThresholdReached(t *testing.T) {
 		}
 		shares = append(shares, share)
 
-		decKey, _ := generateRandomBytes(32)
+		decKey, _ := generateRandom32Bytes()
 		_, err := keyperCoreDB.InsertDecryptionKey(ctx, corekeyperdatabase.InsertDecryptionKeyParams{
 			Eon:           int64(keyperConfigIndex),
 			EpochID:       identityPreimage.Bytes,

rolling-shutter/keyperimpl/shutterservice/newblock_test.go

@@ -55,12 +55,12 @@ func TestProcessBlockSuccess(t *testing.T) {
 		decryptionTriggerChannel: decryptionTriggerChannel,
 	}
 
-	blockHash, _ := generateRandomBytes(32)
+	blockHash, _ := generateRandom32Bytes()
 	blockTimestamp := time.Now().Add(5 * time.Second).Unix()
 	blockNumber := 102
 	activationBlockNumber := 100
 
-	identityPrefix, _ := generateRandomBytes(32)
+	identityPrefix, _ := generateRandom32Bytes()
 	identity := computeIdentity(&shutterregistry.ShutterregistryIdentityRegistered{
 		IdentityPrefix: [32]byte(identityPrefix),
 		Sender:         sender,

rolling-shutter/keyperimpl/shutterservice/registrysyncer_test.go

@@ -23,7 +23,7 @@ func TestFilterIdentityRegisteredEvents(t *testing.T) {
 	}
 	events := make([]*registryBindings.ShutterregistryIdentityRegistered, 2)
 	for i := 0; i < 2; i++ {
-		identityPrefix, err := generateRandomBytes(32)
+		identityPrefix, err := generateRandom32Bytes()
 		assert.NilError(t, err)
 		_, sender, err := generateRandomAccount()
 		assert.NilError(t, err)
@@ -49,7 +49,7 @@ func TestInsertIdentityRegisteredEvents(t *testing.T) {
 	ctx := context.Background()
 	events := make([]*registryBindings.ShutterregistryIdentityRegistered, 2)
 	for i := 0; i < 2; i++ {
-		identityPrefix, err := generateRandomBytes(32)
+		identityPrefix, err := generateRandom32Bytes()
 		assert.NilError(t, err)
 		_, sender, err := generateRandomAccount()
 		assert.NilError(t, err)
@@ -73,8 +73,8 @@ func TestInsertIdentityRegisteredEvents(t *testing.T) {
 	assert.NilError(t, err)
 }
 
-func generateRandomBytes(n int) ([]byte, error) {
-	b := make([]byte, n)
+func generateRandom32Bytes() ([]byte, error) {
+	b := make([]byte, 32)
 	_, err := cryptoRand.Read(b)
 	if err != nil {
 		return nil, err