├── .gitignore
├── Cargo.lock
├── Cargo.toml
├── README.md
├── assets
    └── DASNode.png
└── src
    ├── content_key.rs
    ├── discovery.rs
    ├── main.rs
    ├── node_struct.rs
    ├── overlay.rs
    └── scratch.rs


/.gitignore:
--------------------------------------------------------------------------------
1 | /target
2 | 


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3690 | dependencies = [
3691 |  "windows_aarch64_gnullvm",
3692 |  "windows_aarch64_msvc",
3693 |  "windows_i686_gnu",
3694 |  "windows_i686_msvc",
3695 |  "windows_x86_64_gnu",
3696 |  "windows_x86_64_gnullvm",
3697 |  "windows_x86_64_msvc",
3698 | ]
3699 | 
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3742 | [[package]]
3743 | name = "winreg"
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3747 | dependencies = [
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3757 |  "winapi 0.2.8",
3758 |  "winapi-build",
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3761 | [[package]]
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3772 | dependencies = [
3773 |  "zeroize_derive",
3774 | ]
3775 | 
3776 | [[package]]
3777 | name = "zeroize_derive"
3778 | version = "1.3.3"
3779 | source = "registry+https://github.com/rust-lang/crates.io-index"
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3782 |  "proc-macro2",
3783 |  "quote",
3784 |  "syn",
3785 |  "synstructure",
3786 | ]
3787 | 
3788 | [[package]]
3789 | name = "zstd-sys"
3790 | version = "1.6.3+zstd.1.5.2"
3791 | source = "registry+https://github.com/rust-lang/crates.io-index"
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3793 | dependencies = [
3794 |  "cc",
3795 |  "libc",
3796 | ]
3797 | 


--------------------------------------------------------------------------------
/Cargo.toml:
--------------------------------------------------------------------------------
 1 | [package]
 2 | name = "das_playground"
 3 | version = "0.1.0"
 4 | edition = "2021"
 5 | 
 6 | # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 7 | 
 8 | [dependencies]
 9 | anyhow = "1.0.66"
10 | async-trait = "0.1.58"
11 | discv5 = "0.1"
12 | discv5-overlay = {git = "https://github.com/timoth-y/discv5-overlay" }
13 | eth2_ssz = "0.4.0"
14 | eth2_ssz_derive = "0.3.0"
15 | futures = "0.3.24"
16 | hex = "0.4.3"
17 | parking_lot = "0.11.2"
18 | rand = "0.8.5"
19 | tokio = { version = "1.23.0", features = ["full"] }
20 | tokio-stream = "0.1.10"
21 | tracing = { version = "0.1.29" }
22 | 
23 | [patch.crates-io]
24 | discv5 = {git = "https://github.com/timoth-y/discv5"}


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # Motivation
 2 | As per Ethereum's [rollup-centric roadmap](https://ethereum-magicians.org/t/a-rollup-centric-ethereum-roadmap/4698), full-scale Danksharding requires extra *blob* data to be [available](https://github.com/ethereum/research/wiki/A-note-on-data-availability-and-erasure-coding) for others to download.  Efficient verification of a blob's availability can be achieved through the process of [data availability sampling](https://hackmd.io/@vbuterin/sharding_proposal#ELI5-data-availability-sampling), allowing the network to come to consensus on this data's availability without increasing the computational resources required for a node.
 3 | 
 4 | Between this increase in information (from 90 KB to 128 MB per block!) and our new communication paradigm (data availability sampling), Ethereum's Consensus Layer P2P Network needs an upgrade.
 5 | 
 6 | Designs around *how* Ethereum's Consensus Layer P2P Network network can communicate this new information is an open question known as the [Data Availability Sampling Networking problem](https://github.com/ethereum/requests-for-proposals/blob/master/open-rfps/das.md).
 7 | 
 8 | 
 9 | 
10 | # Summary
11 | One possible solution to *part of* the DAS Networking problem is to create a **Secure Kademlia DHT overlay network atop Discv5**, with the goal of facilitating a robust structured network where samples could be efficiently stored and retrieved throughout Ethereum's consensus layer network.  **This S/Kad overlay network would serve as a backup in case the primary network was attacked.**
12 | 
13 | DAS Playground aims to combine Dankrad's idea of a [Secure Kademlia DHT]((https://notes.ethereum.org/@dankrad/S-Kademlia-DAS)) with the main data struct, [DASNode](https://github.com/ChainSafe/das-prototype/blob/main/src/main.rs#L88), found within Timofey and Eric's discv5 overlay simulation, [DAS Prototype](https://github.com/ChainSafe/das-prototype), to create the networking stack nodes need for a DAS p2p networking design.
14 | 
15 | 
16 |  
17 | ![dasnode_image](./assets/DASNode.png)
18 | 
19 | [DAS Playground](https://github.com/EchoAlice/das-playground) and [DAS Prototype](https://github.com/ChainSafe/das-prototype) leverage Trin's [overlay protocol](https://github.com/ethereum/trin/tree/master/trin-core/src/portalnet) + Sigma Prime's [discv5 protocol](https://github.com/sigp/discv5) to support these custom overlay networks.
20 | 
21 | 
22 |  
23 | # Current Repository Status
24 | DASNodes contain discv5, overlay, and secure overlay protocol structs, services and message processing.  The discv5 protocol [powers these overlay networks](https://notes.ethereum.org/@pipermerriam/B1SS-nhad) via its TalkReq/TalkResp message.  DAS Playground's instance of discv5 seems to be supporting all base protocol [Overlay Network functionality](https://github.com/ethereum/portal-network-specs/blob/796d3c5772e845b98a6191465a695be7f5324b65/implementation-details-overlay.md#portal-network-overlay-network-functionality) needed for overlay routing table maintenance.
25 | 
26 | 
27 | **Note:** 
28 | As of right now the overlay and secure overlay protocol structs are functionally the same.  **There is no updated secure kademlia routing table logic that allows for desired secure overlay properties**: our DASNode just has two separate routing tables that can send and receive discv5 TalkReq/TalkResp messages to each individual subnetwork.  I'm beginning work on a secure kademlia library that will (hopefully) integrate in with this repository.
29 | 
30 | ### To Do:
31 | 1. Send and receive samples via overlay and secure overlay networks
32 | 2. Implement all other [Portal Wire Protocol Message types](https://github.com/ethereum/portal-network-specs/blob/796d3c5772e845b98a6191465a695be7f5324b65/implementation-details-overlay.md#portal-network-overlay-network-functionality):
33 |     - Ping/Pong
34 |     - FindNodes/FoundNodes
35 |     - FindContent/FoundContent
36 |     - Offer/Accept
37 | 3. Combine overlay functions' logic
38 | 4. Implement concurrent communication
39 | 5. Integrate SecureDAS Overlay within [Model DAS](https://github.com/EchoAlice/Model-DAS)
40 | 6. Create attacks and fallback network logic


--------------------------------------------------------------------------------
/assets/DASNode.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/EchoAlice/das-playground/7e3828c94606cb733c17820d25266c8c61bca809/assets/DASNode.png


--------------------------------------------------------------------------------
/src/content_key.rs:
--------------------------------------------------------------------------------
  1 | use async_trait::async_trait;
  2 | use discv5::ConnectionDirection;
  3 | use discv5_overlay::{
  4 |     portalnet::types::content_key::OverlayContentKey,
  5 |     types::validation::Validator,
  6 | };
  7 | use std::{
  8 |     fmt,
  9 |     fmt::Display,
 10 | };
 11 | use ssz::{Decode, Encode};
 12 | use ssz_derive::{Decode, Encode};
 13 | 
 14 | 
 15 | 
 16 | // Content keys are used to request or offer specific content data through discv5.  Certain overlay networks allow communication of certain types of content. 
 17 | // Discv5 TalkReq/TalkResp uses these keys to know which overlay-specific req handling logic is needed
 18 | 
 19 | // To Do:
 20 | //      Consolidate logic
 21 | 
 22 | /// This is a content key in the DAS overlay network.
 23 | #[derive(Clone, Debug, Decode, Encode, PartialEq)]
 24 | #[ssz(enum_behaviour = "union")]
 25 | pub enum DASContentKey {
 26 |     Sample([u8; 32]),
 27 | }
 28 | 
 29 | #[allow(clippy::from_over_into)]
 30 | impl Into<Vec<u8>> for DASContentKey {
 31 |     fn into(self) -> Vec<u8> {
 32 |         self.as_ssz_bytes()
 33 |     }
 34 | }
 35 | 
 36 | impl TryFrom<Vec<u8>> for DASContentKey {
 37 |     type Error = &'static str;
 38 | 
 39 |     fn try_from(value: Vec<u8>) -> Result<Self, Self::Error> {
 40 |         match DASContentKey::from_ssz_bytes(&value) {
 41 |             Ok(key) => Ok(key),
 42 |             Err(_err) => {
 43 |                 println!("unable to decode DASContentKey");
 44 |                 Err("Unable to decode SSZ")
 45 |             }
 46 |         }
 47 |     }
 48 | }
 49 | 
 50 | impl Display for DASContentKey {
 51 |     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 52 |         let s = match self {
 53 |             Self::Sample(b) => format!("sample: {}", hex::encode(b)),
 54 |         };
 55 | 
 56 |         write!(f, "{}", s)
 57 |     }
 58 | }
 59 | 
 60 | impl OverlayContentKey for DASContentKey {
 61 |     fn content_id(&self) -> [u8; 32] {
 62 |         match self {
 63 |             DASContentKey::Sample(b) => b.clone(),
 64 |         }
 65 |     }
 66 | }
 67 | 
 68 | pub struct DASValidator;
 69 | 
 70 | // Implementing a trait on a type
 71 | #[async_trait]
 72 | impl Validator<DASContentKey> for DASValidator {
 73 |     async fn validate_content(
 74 |         &self,
 75 |         content_key: &DASContentKey,
 76 |         content: &[u8],
 77 |     ) -> anyhow::Result<()>
 78 | // where
 79 |         //     DASContentKey: 'async_trait,
 80 |     {
 81 |         match content_key {
 82 |             DASContentKey::Sample(_) => Ok(()),
 83 |         }
 84 |     }
 85 | }
 86 | 
 87 | 
 88 | 
 89 | 
 90 | 
 91 | /// This is a content key in the SecureDAS overlay network.
 92 | #[derive(Clone, Debug, Decode, Encode, PartialEq)]
 93 | #[ssz(enum_behaviour = "union")]
 94 | pub enum SecureDASContentKey {
 95 |     Sample([u8; 32]),
 96 | }
 97 | 
 98 | #[allow(clippy::from_over_into)]
 99 | impl Into<Vec<u8>> for SecureDASContentKey {
100 |     fn into(self) -> Vec<u8> {
101 |         self.as_ssz_bytes()
102 |     }
103 | }
104 | 
105 | impl TryFrom<Vec<u8>> for SecureDASContentKey {
106 |     type Error = &'static str;
107 | 
108 |     fn try_from(value: Vec<u8>) -> Result<Self, Self::Error> {
109 |         match SecureDASContentKey::from_ssz_bytes(&value) {
110 |             Ok(key) => Ok(key),
111 |             Err(_err) => {
112 |                 println!("unable to decode SecureDASContentKey");
113 |                 Err("Unable to decode SSZ")
114 |             }
115 |         }
116 |     }
117 | }
118 | 
119 | impl Display for SecureDASContentKey {
120 |     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
121 |         let s = match self {
122 |             Self::Sample(b) => format!("sample: {}", hex::encode(b)),
123 |         };
124 | 
125 |         write!(f, "{}", s)
126 |     }
127 | }
128 | 
129 | impl OverlayContentKey for SecureDASContentKey {
130 |     fn content_id(&self) -> [u8; 32] {
131 |         match self {
132 |             SecureDASContentKey::Sample(b) => b.clone(),
133 |         }
134 |     }
135 | }
136 | 
137 | pub struct SecureDASValidator;
138 | 
139 | #[async_trait]
140 | impl Validator<SecureDASContentKey> for SecureDASValidator {
141 |     async fn validate_content(
142 |         &self,
143 |         content_key: &SecureDASContentKey,
144 |         content: &[u8],
145 |     ) -> anyhow::Result<()>
146 | // where
147 |         //     SecureDASContentKey: 'async_trait,
148 |     {
149 |         match content_key {
150 |             SecureDASContentKey::Sample(_) => Ok(()),
151 |         }
152 |     }
153 | }


--------------------------------------------------------------------------------
/src/discovery.rs:
--------------------------------------------------------------------------------
 1 | use discv5::{
 2 |     Discv5,
 3 |     Discv5ConfigBuilder,
 4 |     Discv5Event, 
 5 |     enr,
 6 |     Enr, 
 7 |     enr::CombinedKey,
 8 | };
 9 | use discv5_overlay::portalnet::discovery::Discovery;
10 | use std::{
11 |     net::Ipv4Addr,
12 |     str::FromStr,
13 |     sync::Arc,
14 |     time::Duration,
15 | };
16 | 
17 | /*
18 |     The Node Discovery Protocol v5 (discv5) is the UDP-based p2p network that Ethereum Nodes use
19 |     to establish network connections with other nodes.  It acts as a database of all live nodes
20 |     in the network, performing 3 main functions:
21 |         1. Sampling the set of all live node
22 |         2. Searching for nodes providing a certain service (topic advertisement) 
23 |         3. Authoratative resolution of node records with a node's id
24 | 
25 |     Discv5 implements message passing via UDP transport!  
26 |         This allows for fast ping/pong message between nodes (necessary to establish real connection).
27 |         A more formal connection via TCP (or UTP wrt DAS Prototype + Trin?) is then established.
28 |         
29 |         "For discovery, where a node simply wants to make its presence known in order to then 
30 |             establish a formal connection with a peer, UDP is sufficient"
31 | */
32 | 
33 | // Questions:
34 | //      Why does our discv5 struct have no table entries?
35 | 
36 | // Creates discovery protocol struct + service for a node! 
37 | pub async fn create_discovery(i: u16) -> Arc<Discovery> {
38 |     // UDP port to find peers  +  IP address to connect to peers to have its record relayed in the DHT
39 |     // I believe this is a client-side (ephemeral) port 
40 |     let port_start = 9000 + i;
41 |     let listen_ip = String::from("127.0.0.1").parse::<Ipv4Addr>().unwrap(); 
42 | 
43 |     // Generates local node's random enr key and new enr.  *Base the secp256k1 on our node's public key*
44 |     // There's a lot to talk about wrt ENR things.  Create a summary here soon 
45 |     let enr_key = CombinedKey::generate_secp256k1();
46 |     let enr = {
47 |         let mut builder = enr::EnrBuilder::new("v4");
48 |         builder.ip4(listen_ip);
49 |         builder.udp4(port_start);
50 |         builder.build(&enr_key).unwrap()
51 |     }; 
52 |     
53 |     // Discv5 configuration.  Following Eric and Timofey's lead
54 |     let mut config_builder = Discv5ConfigBuilder::default();
55 |     config_builder.request_retries(10);
56 |     config_builder.filter_max_nodes_per_ip(None);
57 |     config_builder.request_timeout(Duration::from_secs(60));
58 |     config_builder.query_timeout(Duration::from_secs(60)); 
59 |     let config = config_builder.build();
60 |    
61 |     // Construct the discv5 server
62 |     let mut discv5 = Discv5::new(enr, enr_key, config).unwrap();
63 |     let ip4 = discv5.local_enr().ip4().unwrap();
64 |     let udp4 = discv5.local_enr().udp4().unwrap();
65 | 
66 |     // Initializes the discv5 service.  Starts the required tasks and begins listening on a given UDP SocketAddr
67 |     discv5.start(format!("{}:{}", ip4, udp4).parse().unwrap())
68 |         .await
69 |         .unwrap();
70 |    
71 |     // Initializes our protocol struct 
72 |     let discovery = Arc::new(Discovery::new_raw(discv5, Default::default())); 
73 |      
74 |     discovery
75 | }


--------------------------------------------------------------------------------
/src/main.rs:
--------------------------------------------------------------------------------
  1 | #![allow(unused)]
  2 | use discv5::{
  3 |     Discv5Event, 
  4 |     TalkRequest
  5 | };
  6 | use discv5_overlay::{
  7 |     portalnet::{
  8 |         discovery::Discovery,
  9 |         overlay_service::{
 10 |             OverlayCommand,
 11 |             OverlayService
 12 |         },
 13 |         storage::MemoryContentStore,
 14 |         types::{
 15 |             distance::XorMetric,
 16 |             messages::ProtocolId
 17 |         }, 
 18 |     },
 19 |     utp::stream::{UtpListener, UtpListenerEvent}
 20 | };
 21 | use futures::StreamExt; 
 22 | use rand::Rng;
 23 | use std::{
 24 |     str::FromStr,
 25 |     sync::Arc,
 26 | };
 27 | use tokio::{
 28 |     select, 
 29 |     sync::mpsc::{UnboundedReceiver, UnboundedSender}
 30 | };
 31 | use tokio_stream::wrappers::ReceiverStream;
 32 | use tracing;
 33 | use tracing::log::error;
 34 | 
 35 | use crate::{
 36 |     node_struct::DASNode,
 37 |     content_key::{
 38 |         DASContentKey, 
 39 |         DASValidator,
 40 |         SecureDASContentKey,
 41 |         SecureDASValidator,
 42 |     }
 43 | };
 44 | 
 45 | pub mod content_key;
 46 | pub mod discovery;
 47 | pub mod node_struct;
 48 | pub mod overlay;
 49 | 
 50 | pub const NUMBER_OF_NODES: usize = 10;
 51 | const DAS_PROTOCOL_ID: &str = "DAS";
 52 | const SECURE_DAS_PROTOCOL_ID: &str = "SECURE_DAS";
 53 | 
 54 | /*
 55 |     Goals 
 56 |         - Create DASNodes that contain the protocols and subprotocols needed for a backup, 
 57 |           validator-only DHT, discv5 overlay network so participates in the repo can communicate.  
 58 | 
 59 |     Questions:
 60 |         - Are data shard validator committees the same committees used within Light Client things?  
 61 |         - Should I create a proxy for message processing to handle my two seperate overlays?
 62 | 
 63 | 
 64 |     Notes:
 65 |         - Discv5 IP addresses might be wrong
 66 |         - Trin uses a proxy for message processing:  https://github.com/ethereum/trin/blob/master/trin-core/src/portalnet/discovery.rs#L174 
 67 | */
 68 | 
 69 | 
 70 | #[tokio::main]
 71 | async fn main() {
 72 |     //============================ 
 73 |     //   Part 1:  Node Creation
 74 |     //============================ 
 75 |     let mut discv5_structs = Vec::new();
 76 |     let mut nodes = Vec::new();
 77 | 
 78 |     // Create all Discv5 servers, then pass these into create_nodes.
 79 |     for i in 0.. NUMBER_OF_NODES {
 80 |         let discv5_struct = discovery::create_discovery(i as u16).await;
 81 |         discv5_structs.push(discv5_struct)
 82 |     }
 83 | 
 84 |     // Populate discv5 tables
 85 |     for i in 0..NUMBER_OF_NODES {
 86 |         populate_discv5_table(i, discv5_structs.clone());
 87 |     }
 88 | 
 89 |     // Instantiates protocol structs and message processing within each node
 90 |     for i in discv5_structs.into_iter() {
 91 |         let (
 92 |             starter_node, 
 93 |             mut overlay_service,
 94 |             mut secure_overlay_service, 
 95 |             utp_events_tx, 
 96 |             utp_listener_rx
 97 |         ) = create_node(i).await;
 98 |      
 99 |         let mut event_str = ReceiverStream::new(starter_node.discovery.discv5.event_stream().await.unwrap());
100 | 
101 |         // Copying the entire node to pass info into our task manager  :P 
102 |         let node = starter_node.clone(); 
103 |         nodes.push(starter_node);
104 |         
105 |         // Instantiates task manager to continually process ALL messages for each node (server side of node).
106 |         // Wrap message processing code into a function so it's easy to read.
107 |         tokio::spawn(async move {
108 |             loop {
109 |                 /// "Select!" randomly picks one of these match branches to process an event 
110 |                 select! {
111 |                     // =========================== 
112 |                     // Overlay Message Processing:  
113 |                     // =========================== 
114 |                     // Request 
115 |                     Some(command) = overlay_service.command_rx.recv() => {
116 |                         match command {
117 |                             OverlayCommand::Request(request) => { 
118 |                                 println!("Processing Overlay Request"); 
119 |                                 overlay_service.process_request(request)
120 |                             }, 
121 |                             _ => {}    
122 |                         }
123 |                     }
124 |                     // Response 
125 |                     Some(response) = overlay_service.response_rx.recv() => {
126 |                         // Look up active request that corresponds to the response.
127 |                         let optional_active_request = overlay_service.active_outgoing_requests.write().remove(&response.request_id);
128 |                         if let Some(active_request) = optional_active_request {
129 |                             println!("Send overlay response");
130 |                             println!("\n");
131 |                             // Send response to responder if present.
132 |                             if let Some(responder) = active_request.responder {
133 |                                 let _ = responder.send(response.response.clone());
134 |                             }
135 | 
136 |                             // Perform background processing.
137 |                             match response.response {
138 |                                 Ok(response) => overlay_service.process_response(response, active_request.destination, active_request.request, active_request.query_id),
139 |                                 Err(error) => overlay_service.process_request_failure(response.request_id, active_request.destination, error),
140 |                             }
141 | 
142 |                         } else {
143 |                             println!("No request found for response");
144 |                         }
145 |                     } 
146 |                     // ================================== 
147 |                     // Secure Overlay Message Processing:  
148 |                     // ================================== 
149 |                     // Request 
150 |                     Some(command) = secure_overlay_service.command_rx.recv() => {
151 |                         match command {
152 |                             OverlayCommand::Request(request) => { 
153 |                                 println!("Processing Secure Overlay Request"); 
154 |                                 secure_overlay_service.process_request(request)
155 |                             }, 
156 |                             _ => {}    
157 |                         }
158 |                     }
159 |                     // Response 
160 |                     Some(response) = secure_overlay_service.response_rx.recv() => {
161 |                         // Look up active request that corresponds to the response.
162 |                         let optional_active_request = secure_overlay_service.active_outgoing_requests.write().remove(&response.request_id);
163 |                         if let Some(active_request) = optional_active_request {
164 |                             println!("Send secure overlay response");
165 |                             println!("\n");
166 |                             // Send response to responder if present.
167 |                             if let Some(responder) = active_request.responder {
168 |                                 let _ = responder.send(response.response.clone());
169 |                             }
170 | 
171 |                             // Perform background processing.
172 |                             match response.response {
173 |                                 Ok(response) => secure_overlay_service.process_response(response, active_request.destination, active_request.request, active_request.query_id),
174 |                                 Err(error) => secure_overlay_service.process_request_failure(response.request_id, active_request.destination, error),
175 |                             }
176 | 
177 |                         } else {
178 |                             println!("No request found for response");
179 |                         }
180 |                     } 
181 |                     // ==========================
182 |                     // Discv5 Message Processing: 
183 |                     // ==========================
184 |                     // Incoming event
185 |                     Some(event) = event_str.next() => {
186 |                         // let chan = format!("{:?} {i}", node.discovery.discv5.local_enr().node_id().to_string());
187 |                         match event {
188 |                             Discv5Event::TalkRequest(req) => {
189 |                                 // println!("Stream {}: Discv5 TalkReq received", chan);  
190 |                                 
191 |                                 let node = node.clone(); 
192 |                                 tokio::spawn(async move {
193 |                                     let protocol = ProtocolId::from_str(&hex::encode_upper(req.protocol())).unwrap();
194 | 
195 |                                     if protocol == ProtocolId::Custom(DAS_PROTOCOL_ID.to_string()) {
196 |                                         println!("Enters DAS Protocol");  
197 |                                         let talk_resp = match node.overlay.process_one_request(&req).await {
198 |                                             Ok(response) => discv5_overlay::portalnet::types::messages::Message::from(response).into(),
199 |                                             Err(err) => {
200 |                                                 error!("Error processing request:");
201 |                                                 // error!("Node {chan} Error processing request: {err}");
202 |                                                 return;
203 |                                             },
204 |                                         };
205 | 
206 |                                         if let Err(err) = req.respond(talk_resp) {
207 |                                             println!("Error");  
208 |                                             error!("Unable to respond to talk request: ");
209 |                                             // error!("Unable to respond to talk request: {}", err);
210 |                                             return;
211 |                                         }
212 | 
213 |                                         return;
214 |                                     }
215 | 
216 |                                     // See if we can watch for a secure overlay event.
217 |                                     if protocol == ProtocolId::Custom(SECURE_DAS_PROTOCOL_ID.to_string()) {
218 |                                         println!("Enters SecureDAS Protocol");  
219 |                                         let talk_resp = match node.overlay.process_one_request(&req).await {
220 |                                         // let talk_resp = match node.secure_overlay.process_one_request(&req).await {
221 |                                             Ok(response) => discv5_overlay::portalnet::types::messages::Message::from(response).into(),
222 |                                             Err(err) => {
223 |                                                 error!("Node Error processing request: ");
224 |                                                 // error!("Node {chan} Error processing request: {err}");
225 |                                                 return;
226 |                                             },
227 |                                         };
228 | 
229 |                                         if let Err(err) = req.respond(talk_resp) {
230 |                                             println!("Error");  
231 |                                             error!("Unable to respond to talk request: ");
232 |                                             // error!("Unable to respond to talk request: {}", err);
233 |                                             return;
234 |                                         }
235 | 
236 |                                         return;
237 |                                     }
238 |                                     // let resp = handle_talk_request(req.node_id().clone(), req.protocol(), req.body().to_vec(), node, opts, enr_to_libp2p, node_ids, i).await;
239 |                                     // let resp = handle_talk_request(req.node_id().clone(), req.protocol(), req.body().to_vec(), node).await;
240 |                                     // req.respond(resp);
241 |                                 });
242 |                             },
243 |                             _ => {}    
244 |                         }
245 |                     },
246 |                 }
247 |             } 
248 |         });
249 |     }
250 | 
251 |     // View of a node's routing table
252 |     // ----------------------------
253 |     println!("Node's discv5 routing table: {:?}", nodes[2].discovery.connected_peers()); 
254 |     println!("\n");
255 |     println!("Node's overlay routing table: {:?}", nodes[2].overlay.table_entries_id()); 
256 |     println!("\n");
257 |     println!("Node's secure overlay routing table: {:?}", nodes[2].secure_overlay.table_entries_id()); 
258 |     println!("\n");
259 | 
260 | 
261 |     /* 
262 |     ================================== 
263 |        Part 2: Node Communication
264 |     ================================== 
265 |        Creates simple communication between nodes. We need to pass our overlay messages 
266 |        through peers' routing tables.  Implement concurrent communication later.     
267 |     
268 |        Overlay Protocol struct --> calls our Overlay Service   
269 |     */
270 | 
271 |     // Overlay Messaging
272 |     // ------------------ 
273 |     let das_ping = nodes[1].overlay.send_ping(nodes[2].overlay.local_enr());
274 |     das_ping.await;
275 |     // TODO: Send find_nodes 
276 |     // TODO: Send find_content 
277 | 
278 |     // Secure Overlay Messaging
279 |     // -------------------------- 
280 |     let secure_das_ping = nodes[1].secure_overlay.send_ping(nodes[2].secure_overlay.local_enr());
281 |     secure_das_ping.await;
282 |     // TODO: Send find_nodes 
283 |     // TODO: Send find_content 
284 | 
285 |     //================================ 
286 |     //         Sanity Check 
287 |     //================================ 
288 |     println!("Overlay Protocol ID: {:?}", nodes[2].overlay.protocol()); 
289 |     println!("Secure Overlay Protocol ID: {:?}", nodes[2].secure_overlay.protocol()); 
290 | 
291 | }
292 | 
293 | 
294 | async fn create_node(discv5_struct: Arc<Discovery>) -> (
295 |         DASNode, 
296 |         OverlayService<DASContentKey, XorMetric, DASValidator, MemoryContentStore>,
297 |         OverlayService<SecureDASContentKey, XorMetric, SecureDASValidator, MemoryContentStore>,
298 |         UnboundedSender<TalkRequest>,
299 |         UnboundedReceiver<UtpListenerEvent>
300 |     ) {
301 | 
302 |     // DAS Overlay UTP Channel 
303 |     let ( utp_events_tx, 
304 |             utp_listener_tx, mut utp_listener_rx, 
305 |             mut utp_listener,
306 |     ) = UtpListener::new(discv5_struct.clone());
307 |     tokio::spawn(async move { utp_listener.start().await });
308 |     
309 |     // Secure DAS Overlay UTP Channel 
310 |     let ( secure_utp_events_tx, 
311 |             secure_utp_listener_tx, mut secure_utp_listener_rx, 
312 |             mut secure_utp_listener,
313 |     ) = UtpListener::new(discv5_struct.clone());
314 |     tokio::spawn(async move { secure_utp_listener.start().await });
315 | 
316 |     // DAS and Secure DAS Overlay Protocols
317 |     let (overlay, overlay_service) = overlay::create_das_overlay(discv5_struct.clone(), utp_listener_tx).await;
318 |     let (secure_overlay, secure_overlay_service) = overlay::create_secure_das_overlay(discv5_struct.clone(), secure_utp_listener_tx).await;  
319 | 
320 |     //  Samples: TODO
321 |     
322 |     //  Handled_ids: TODO 
323 | 
324 |     // Creates node (Timofey creates node with utp_listener_tx) 
325 |     let mut my_node = DASNode::new(discv5_struct, overlay, secure_overlay);
326 |     
327 |     (
328 |         my_node,
329 |         overlay_service,
330 |         secure_overlay_service,
331 |         utp_events_tx,
332 |         utp_listener_rx
333 |     ) 
334 | }
335 | 
336 | 
337 | // Adds nodes from within the simulation to routing tables.  
338 | fn populate_discv5_table(local_index: usize, mut structs: Vec<Arc<Discovery>>) {
339 |     // Number of peers a node adds to their routing table 
340 |     let mut n = 3;
341 |     let mut used_indexes = Vec::new();
342 | 
343 |     while n != 0 {
344 |         let mut invalid_index = false; 
345 |         let mut rng = rand::thread_rng();
346 |         let rand = rng.gen_range(0usize..NUMBER_OF_NODES);
347 | 
348 |         // Makes sure we aren't duplicating nodes within our routing table 
349 |         for i in 0..used_indexes.len() {
350 |             if rand == used_indexes[i] || rand == local_index {
351 |                 invalid_index = true; 
352 |             }
353 |         }
354 |         
355 |         if invalid_index == false {
356 |             match structs[local_index].discv5.add_enr(structs[rand].discv5.local_enr().clone()) {
357 |                 Ok(_) => {
358 |                     used_indexes.push(rand);
359 |                     n -= 1;
360 |                 },
361 |                 Err(_) => continue,
362 |             }
363 |         }
364 |     }
365 | }


--------------------------------------------------------------------------------
/src/node_struct.rs:
--------------------------------------------------------------------------------
 1 | use discv5_overlay::{
 2 |     portalnet::{
 3 |         discovery::Discovery, 
 4 |         overlay::OverlayProtocol, 
 5 |         storage::MemoryContentStore, 
 6 |         types::distance::XorMetric
 7 |     }, 
 8 | };
 9 | use std::sync::Arc;
10 | 
11 | use crate::content_key::{
12 |     DASContentKey, 
13 |     DASValidator,
14 |     SecureDASContentKey,
15 |     SecureDASValidator,
16 | };
17 | 
18 | 
19 | #[derive(Clone)]
20 | pub struct DASNode {
21 |     pub discovery: Arc<Discovery>,
22 |     pub overlay: Arc<OverlayProtocol<DASContentKey, XorMetric, DASValidator, MemoryContentStore>>,
23 |     pub secure_overlay: Arc<OverlayProtocol<SecureDASContentKey, XorMetric, SecureDASValidator, MemoryContentStore>>,
24 |     
25 |     samples: [u8; 8],
26 |     pub handled_ids: i32,
27 | }
28 | 
29 | // The DASNode within Model-DAS returns itself AND an overlay service!
30 | impl DASNode {
31 |     pub fn new(
32 |         discovery: Arc<Discovery>,
33 |         overlay: Arc<OverlayProtocol<DASContentKey, XorMetric, DASValidator, MemoryContentStore>>,
34 |         secure_overlay: Arc<OverlayProtocol<SecureDASContentKey, XorMetric, SecureDASValidator, MemoryContentStore>>,
35 |     ) -> Self {
36 |         Self {
37 |             discovery,
38 |             overlay,
39 |             secure_overlay,
40 |             samples: [0; 8],       
41 |             handled_ids: 0,
42 |         }
43 |     }
44 | }


--------------------------------------------------------------------------------
/src/overlay.rs:
--------------------------------------------------------------------------------
  1 | use discv5_overlay::{
  2 |     portalnet::{
  3 |         discovery::Discovery,
  4 |         overlay::{
  5 |             OverlayConfig, 
  6 |             OverlayProtocol
  7 |         },
  8 |         overlay_service::OverlayService,
  9 |         storage::{DistanceFunction, MemoryContentStore},
 10 |         types::{
 11 |             distance::{Distance, XorMetric},
 12 |             messages::ProtocolId
 13 |         }
 14 |     },
 15 |     utp::stream::UtpListenerRequest,
 16 | };
 17 | use std::{
 18 |     sync::Arc,
 19 |     time::Duration
 20 | };
 21 | use tokio::sync::mpsc;
 22 | 
 23 | use crate::content_key::{
 24 |     DASContentKey,
 25 |     DASValidator,
 26 |     SecureDASContentKey, 
 27 |     SecureDASValidator, 
 28 | };
 29 | 
 30 | const DAS_PROTOCOL_ID: &str = "DAS";
 31 | const SECURE_DAS_PROTOCOL_ID: &str = "SECURE_DAS";
 32 | 
 33 | 
 34 | /*
 35 |     "The Overlay protocol is a layer on top of discv5 that handles all requests from the overlay networks
 36 |     (state, history etc.) and dispatch them to the discv5 protocol TalkReq. Each network should
 37 |     implement the overlay protocol and the overlay protocol is where we can encapsulate the logic for
 38 |     handling common network requests/responses."  
 39 |     -Trin repo
 40 | 
 41 | 
 42 |     Note:
 43 |     - The Validator type what tells our OverlayProtocol::new( ) the type of overlay we're creating
 44 |     - To do: generalize create_overlay function
 45 | */
 46 | 
 47 | 
 48 | // -----------------------------------
 49 | //         INTERMEDIATE PHASE
 50 | //
 51 | // Just implement overlays seperately.
 52 | // -----------------------------------
 53 | //
 54 | // I'm spending a lot of time on complexities within Rust.  Make simple overlay creation functions for now.
 55 | // Circle back once I've implemented the message proxy
 56 | pub async fn create_das_overlay(discovery: Arc<Discovery>, utp_listener_tx: mpsc::UnboundedSender<UtpListenerRequest>) -> (
 57 |     Arc<OverlayProtocol<DASContentKey, XorMetric, DASValidator, MemoryContentStore>>, 
 58 |     OverlayService<DASContentKey, XorMetric, DASValidator, MemoryContentStore>,
 59 | ){
 60 |     let config = OverlayConfig {
 61 |         bootnode_enrs: discovery.discv5.table_entries_enr(),
 62 |         ping_queue_interval: Some(Duration::from_secs(10000)),
 63 |         query_num_results: usize::MAX,
 64 |         query_timeout: Duration::from_secs(60),
 65 |         query_peer_timeout: Duration::from_secs(30),
 66 |         ..Default::default()
 67 |     };
 68 |     // println!("Overlay config bootnodes *OVERLAY*: {:?}", config.bootnode_enrs);
 69 |     let storage = {
 70 |         Arc::new(parking_lot::RwLock::new(MemoryContentStore::new(
 71 |             discovery.discv5.local_enr().node_id(),
 72 |             DistanceFunction::Xor,
 73 |         )))
 74 |     };
 75 |   
 76 |     let protocol = ProtocolId::Custom(DAS_PROTOCOL_ID.to_string());
 77 |     let validator = Arc::new(DASValidator);
 78 | 
 79 |     let (overlay, service) = OverlayProtocol::new(
 80 |         config,
 81 |         discovery.clone(),
 82 |         utp_listener_tx,
 83 |         storage,
 84 |         Distance::MAX,
 85 |         protocol,
 86 |         validator,
 87 |     );
 88 | 
 89 |     // println!("Node's overlay kbuckets table: {:?}", overlay); 
 90 | 
 91 |     let overlay = Arc::new(overlay);
 92 |     ( 
 93 |         overlay, 
 94 |         service 
 95 |     )
 96 | } 
 97 | 
 98 | 
 99 | pub async fn create_secure_das_overlay(discovery: Arc<Discovery>, utp_listener_tx: mpsc::UnboundedSender<UtpListenerRequest>) -> (
100 |     Arc<OverlayProtocol<SecureDASContentKey, XorMetric, SecureDASValidator, MemoryContentStore>>, 
101 |     OverlayService<SecureDASContentKey, XorMetric, SecureDASValidator, MemoryContentStore>,
102 | ){
103 | 
104 |         let config = OverlayConfig {
105 |         bootnode_enrs: discovery.discv5.table_entries_enr(),
106 |         ping_queue_interval: Some(Duration::from_secs(10000)),
107 |         query_num_results: usize::MAX,
108 |         query_timeout: Duration::from_secs(60),
109 |         query_peer_timeout: Duration::from_secs(30),
110 |         ..Default::default()
111 |     };
112 | 
113 |     let storage = {
114 |         Arc::new(parking_lot::RwLock::new(MemoryContentStore::new(
115 |             discovery.discv5.local_enr().node_id(),
116 |             DistanceFunction::Xor,
117 |         )))
118 |     };
119 |   
120 |     let protocol = ProtocolId::Custom(SECURE_DAS_PROTOCOL_ID.to_string());
121 |     let validator = Arc::new(SecureDASValidator);
122 | 
123 |     let (overlay, service) = OverlayProtocol::new(
124 |         config,
125 |         discovery.clone(),
126 |         utp_listener_tx,
127 |         storage,
128 |         Distance::MAX,
129 |         protocol,
130 |         validator,
131 |     );
132 |    
133 |     let overlay = Arc::new(overlay);
134 |     ( 
135 |         overlay, 
136 |         service 
137 |     )
138 | } 


--------------------------------------------------------------------------------
/src/scratch.rs:
--------------------------------------------------------------------------------
1 | pub fn scratch() {
2 | }


--------------------------------------------------------------------------------