feat(constants.js): Add constants module

constants.js

@@ -0,0 +1,25 @@
+'use strict'
+
+// blake2b()
+const kDefaultBlake2bSize = 32
+
+// encryption/decryption
+const kDefaultCipher = 'aes-128-ctr'
+const kDefaultDigest = 'sha1'
+
+// discoveryKey
+const kDefaultDiscoveryKeySize = 32
+
+// uint64
+const kMinUInt64Size = 8
+const kDefaultUInt64Size = kMinUInt64Size
+
+module.exports = {
+ kDefaultDiscoveryKeySize,
+ kDefaultBlake2bSize,
+ kDefaultUInt64Size,
+ kDefaultCipher,
+ kDefaultDigest,
+
+ kMinUInt64Size,
+}