doc: add RoseNet direct v1 protocol spec

specs/rosenet-direct/rosenet-direct-v1.md

@@ -0,0 +1,47 @@
+# RoseNet Direct v1
+
+| Status | creation date | last update date | version |
+| ------ | ------------- | ---------------- | ------- |
+| Draft  | 11 Sep 2024   | 11 Sep 2024      | Draft-1 |
+
+Author: @mkermani144  
+Contributors: N/A
+
+# RoseNet Direct v1 Protocol Specification
+
+## Protocol ID
+
+`/rosenet/direct/1`
+
+## Overview
+
+RoseNet Direct v1 is the messaging protocol used in RoseNet for sending messages to a specific peer in the RoseNet network. It implements a basic acknowledgment mechanism.
+
+## Message Flow
+
+1. The dialing peer sends a message of arbitrary size to the listening peer.
+2. After the message is fully transmitted, the dialing peer waits for an acknowledgment from the listening peer.
+3. The listening peer sends a single byte with the value `1` as an acknowledgment.
+4. If the dialing peer receives any response other than a single byte with the value `1`, it MUST treat this as an error condition.
+
+## Detailed Behavior
+
+### Dialing Peer
+
+1. MUST establish a connection to the listening peer using the RoseNet network.
+2. MUST send the entire message as a single, uninterrupted transmission.
+3. MUST wait for an acknowledgment after sending the complete message.
+4. MUST treat any response other than a single `1` byte as an error.
+5. SHOULD implement a timeout mechanism for waiting for the acknowledgment.
+
+### Listening Peer
+
+1. MUST accept incoming connections for this protocol.
+2. MUST receive the entire message before sending an acknowledgment.
+3. MUST send a single byte with the value `1` as an acknowledgment immediately after receiving the complete message.
+4. MUST NOT send any other data as part of the acknowledgment.
+
+### Error Handling
+
+1. If the dialing peer receives an unexpected response, it SHOULD close the stream and MAY attempt to retransmit the message.
+1. If the listening peer encounters any errors while receiving the message, it SHOULD close the stream without sending an acknowledgment.