Write `get-file` and commands to get the list of blocks from another node

Description

This closes #1 (closed) by providing an API that allows to get a file with just its hash

Detailed list of changes

• add get_file, get_blocks_info_from and other things related to managing the filesystem
• add new commands to nu API
• remove DragoonBehaviour as it was not useful
• add two new tests for get_file and change the already existing test to use the new API

Note

The get_file is still very rough, the error management needs to be handled better to take into a lot more cases of failure

src/dragoon_network.rs

@@ -30,6 +30,7 @@ use crate::error::DragoonError::{
     BadListener, BootstrapError, CouldNotSendBlockResponse, DialError, NoParentDirectory,
     PeerNotFound, ProviderError,
 };
+use crate::peer_block_info::PeerBlockInfo;
 
 use komodo::{
     self,
@@ -58,6 +59,14 @@ pub(crate) struct BlockRequest {
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub(crate) struct BlockResponse(Vec<u8>);
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub(crate) struct PeerBlockInfoRequest{
+    file_hash: String
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub(crate) struct PeerBlockInfoResponse(PeerBlockInfo);
+
 pub(crate) async fn create_swarm<F, G>(
     id_keys: Keypair,
 ) -> Result<Swarm<DragoonBehaviour<F, G>>, Box<dyn Error>>
@@ -90,6 +99,13 @@ where
                 )],
                 request_response::Config::default(),
             ),
+            request_info: request_response::cbor::Behaviour::new(
+                [(
+                    StreamProtocol::new("/file-exchange/1"),
+                    ProtocolSupport::Full,
+                )],
+                request_response::Config::default(),
+            ),
             dragoon: Behaviour::new(),
         })?
         .with_swarm_config(|c| c.with_idle_connection_timeout(Duration::from_secs(60 * 60)))
@@ -110,6 +126,7 @@ where
     G: CurveGroup<ScalarField = F>,
 {
     request_response: request_response::cbor::Behaviour<BlockRequest, BlockResponse>,
+    request_info: request_response::cbor::Behaviour<PeerBlockInfoRequest, PeerBlockInfoResponse>,
     identify: identify::Behaviour,
     kademlia: kad::Behaviour<kad::store::MemoryStore>,
     dragoon: Behaviour<F, G>,