Client cli (#59)

* add scopts and args for start cli, parse command line with fastparse, put and get string values on remote node

* refactoring

* test for parser and comments

* add main class

* seed -> seeds

* headers, PR fixes

src/main/scala/fluence/crypto/KeyStore.scala

@@ -20,6 +20,7 @@ package fluence.crypto
 import fluence.crypto.keypair.KeyPair
 import io.circe.{ Decoder, Encoder, HCursor, Json }
 import scodec.bits.{ Bases, ByteVector }
+import io.circe.parser.decode
 
 import scala.language.higherKinds
 
@@ -54,4 +55,17 @@ object KeyStore {
         } yield KeyStore(KeyPair.fromByteVectors(public, secret))
       }
   }
+
+  def fromBase64(base64: String): KeyStore = {
+    val jsonStr = ByteVector.fromBase64(base64, alphabet) match {
+      case Some(bv) ⇒ new String(bv.toArray)
+      case None ⇒
+        throw new IllegalArgumentException("'" + base64 + "' is not a valid base64.")
+    }
+    decode[Option[KeyStore]](jsonStr) match {
+      case Right(Some(ks)) ⇒ ks
+      case Right(None)     ⇒ throw new IllegalArgumentException("'" + base64 + "' is not a valid key store.")
+      case Left(err)       ⇒ throw new IllegalArgumentException("'" + base64 + "' is not a valid key store.", err)
+    }
+  }
 }