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Update ROADMAP.md based on previous feedback. #3091

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Nov 10, 2022
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Update ROADMAP.md based on previous feedback. #3091

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Update ROADMAP.md
BigLep Nov 7, 2022
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chore: add milestones
p-shahi Nov 7, 2022
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add WebRTC browser to browser
p-shahi Nov 9, 2022
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Merge branch 'master' into docs/update-roadmap-with-feedback-202211
p-shahi Nov 10, 2022
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111 changes: 74 additions & 37 deletions ROADMAP.md
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@@ -1,4 +1,4 @@
# rust-libp2p Roadmap
# rust-libp2p Roadmap <!-- omit in toc -->

Below is a high level roadmap for the rust-libp2p project. Items are ordered by priority (high to
low).
Expand All @@ -8,36 +8,73 @@ This is a living document. Input is always welcome e.g. via GitHub issues or pul
This is the roadmap of the Rust implementation of libp2p. See also the [general libp2p project
roadmap](https://github.com/libp2p/specs/blob/master/ROADMAP.md).

<!-- markdown-toc start - Don't edit this section. Run M-x markdown-toc-refresh-toc -->
**Table of Contents**

- [Experimental QUIC support](#experimental-quic-support)
- [WebRTC support (browser-to-server)](#webrtc-support-browser-to-server)
- [Cross Behaviour communication](#cross-behaviour-communication)
- [Generic connection management](#generic-connection-management)
- [Kademlia efficient querying](#kademlia-efficient-querying)
- [Kademlia client mode](#kademlia-client-mode)
- [Optimize Hole punching](#optimize-hole-punching)
- [Streaming response protocol aka. the ultimate escape hatch](#streaming-response-protocol-aka-the-ultimate-escape-hatch)
- [Improved WASM support](#improved-wasm-support)
- [Handshake optimizations](#handshake-optimizations)
- [Bitswap implementation](#bitswap-implementation)
- [WebTransport](#webtransport)

<!-- markdown-toc end -->

## QUIC support
## Table of Contents <!-- omit in toc -->
- [🛣️ Milestones](#️-milestones)
- [2022](#2022)
- [Mid Q4 (November)](#mid-q4-november)
- [Mid/End of Q4](#midend-of-q4)
- [2023](#2023)
- [Sometime Q1](#sometime-q1)
- [End of Q1 (March)](#end-of-q1-march)
- [Sometime Q2](#sometime-q2)
- [Up Next](#up-next)
- [Appendix](#appendix)
- [QUIC support](#quic-support)
- [WebRTC support (browser-to-server)](#webrtc-support-browser-to-server)
- [Cross Behaviour communication](#cross-behaviour-communication)
- [Generic connection management](#generic-connection-management)
- [Kademlia efficient querying](#kademlia-efficient-querying)
- [Kademlia client mode](#kademlia-client-mode)
- [Optimize Hole punching](#optimize-hole-punching)
- [Streaming response protocol aka. the ultimate escape hatch](#streaming-response-protocol-aka-the-ultimate-escape-hatch)
- [Improved Wasm support](#improved-wasm-support)
- [Handshake optimizations](#handshake-optimizations)
- [Bitswap implementation](#bitswap-implementation)
- [WebTransport](#webtransport)

## 🛣️ Milestones

### 2022

#### Mid Q4 (November)
- [***➡️ test-plans/Interop tests for all existing/developing libp2p transports***](https://github.com/libp2p/test-plans/blob/master/ROADMAP.md#2-interop-test-plans-for-all-existingdeveloping-libp2p-transports)
- [***➡️ test-plans/Benchmarking using nix-builders***](https://github.com/libp2p/test-plans/blob/master/ROADMAP.md#1-benchmarking-using-nix-builders)

#### Mid/End of Q4
- [QUIC support](#quic-support)
- [WebRTC support (browser-to-server)](#webrtc-support-browser-to-server)

### 2023

#### Sometime Q1

#### End of Q1 (March)
- [***➡️ test-plans/Benchmarking using remote runners***](https://github.com/libp2p/test-plans/blob/master/ROADMAP.md#2-benchmarking-using-remote-runners)
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#### Sometime Q2
- [Improved Wasm support](#improved-wasm-support)
- [Handshake optimizations](#handshake-optimizations)

### Up Next
- [WebRTC support (browser-to-browser](#2-webrtc-browser-to-browser)
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I don't think the #2-webrtc-browser-to-browser entry exists in this document. Would you mind adding it in this pull request?

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I've added a section for it, tentatively put it for sometime Q2 2023.

- [***➡️ test-plans/Expansive protocol test coverage***](https://github.com/libp2p/test-plans/blob/master/ROADMAP.md#d-expansive-protocol-test-coverage)
- [Bitswap implementation](#bitswap-implementation)
- [WebTransport](#webtransport)

## Appendix

### QUIC support

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|--------------|-------------|-------------------|---------------------------------------------------|---------------------------------------------------------------------|------------|
| Connectivity | In progress | Q4/2022 | https://github.com/libp2p/rust-libp2p/issues/2883 | [TLS](#tls-support), https://github.com/libp2p/test-plans/issues/53 | |
| Connectivity | In progress | Q4/2022 | https://github.com/libp2p/rust-libp2p/issues/2883 | https://github.com/libp2p/test-plans/issues/53 | |

QUIC has been on the roadmap for a long time. It enables various performance improvements as well as
higher hole punching success rates. We are close to finishing a first version with
https://github.com/libp2p/rust-libp2p/pull/2289. We will improve from there. See tracking issue
https://github.com/libp2p/rust-libp2p/pull/2289 and will improve from there. See tracking issue
https://github.com/libp2p/rust-libp2p/issues/2883.

## WebRTC support (browser-to-server)
### WebRTC support (browser-to-server)

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|--------------|-------------|-------------------|------------------------------------------|------------------------------------------------|------------|
Expand All @@ -49,10 +86,10 @@ https://github.com/libp2p/rust-libp2p/pull/2622. More specifically the server si
browser nodes to connect to rust-libp2p nodes where the latter only have self-signed TLS
certificates. See https://github.com/libp2p/specs/pull/412 for in-depth motivation.

Long term we should enable rust-libp2p running in the browser via WASM to use the browser's WebRTC
stack. Though that should only happen after improved WASM support, see below.
Long term we should enable rust-libp2p running in the browser via Wasm to use the browser's WebRTC
stack. Though that should only happen after improved Wasm support, see below.

## Cross Behaviour communication
### Cross Behaviour communication

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|----------------------|--------|-------------------|---------------------------------------------------|---------------------------------------------------|-----------------------------------------------|
Expand All @@ -69,7 +106,7 @@ protocols) between `NetworkBehaviour` implementations.
Long term we might consider a generic approach for `NetworkBehaviours` to exchange data. Though that
would deserve its own roadmap item.

## Generic connection management
### Generic connection management

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|----------------------|--------|-------------------|---------------------------------------------------|--------------|------------|
Expand All @@ -81,7 +118,7 @@ management generic allows users to build advanced and efficient abstractions on

First draft is in https://github.com/libp2p/rust-libp2p/pull/2828

## Kademlia efficient querying
### Kademlia efficient querying

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|--------------|-------------|-------------------|-------------------------------------------------|--------------|------------|
Expand All @@ -91,7 +128,7 @@ Users of rust-libp2p like [iroh](https://github.com/n0-computer/iroh) need this
usage of `libp2p-kad`. The rust-libp2p maintainers can pick this up unless iroh folks finish the
work before that.

## Kademlia client mode
### Kademlia client mode

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|--------------|--------|-------------------|---------------------------------------------------|-----------------------------------------------------------------|------------|
Expand All @@ -100,7 +137,7 @@ work before that.
Kademlia client mode will enhance routing table health and thus have a positive impact on all
Kademlia operations.

## Optimize Hole punching
### Optimize Hole punching

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|--------------|--------|-------------------|----------|--------------|------------|
Expand All @@ -115,7 +152,7 @@ action](https://discuss.libp2p.io/t/decentralized-nat-hole-punching-measurement-
case you want to help. Based on this data we will likely find many optimizations we can do to our
hole punching stack.

## Streaming response protocol aka. the ultimate escape hatch
### Streaming response protocol aka. the ultimate escape hatch

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|----------------------|--------|-------------------|---------------------------------------------------|--------------|------------|
Expand All @@ -126,19 +163,19 @@ for this, and I think we should not change directions here. That said, the ultim
allowing users to create a stream and do whatever they want with it - will make it easier for
newcomers to get started.

## Improved WASM support
### Improved Wasm support

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|----------------------|--------|-------------------|---------------------------------------------------|--------------|--------------------------------------------|
| Developer ergonomics | todo | Q2/2023 | https://github.com/libp2p/rust-libp2p/issues/2617 | | WebRTC browser-to-browser and browser side |

The project supports WASM already today, though the developer experience is cumbersome at best.
Properly supporting WASM opens rust-libp2p to hole new set of use-cases. I would love for this to
The project supports Wasm already today, though the developer experience is cumbersome at best.
Properly supporting Wasm opens rust-libp2p to hole new set of use-cases. I would love for this to
happen earlier. Though (a) I think we should prioritize improving existing functionality over new
functionality and (b) we don't have high demand for this feature from the community. (One could
argue that that demand follows this roadmap item and not the other way round.)

## Handshake optimizations
### Handshake optimizations

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|--------------|--------|-------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------|--------------|------------|
Expand All @@ -151,7 +188,7 @@ requested from any rust-libp2p users.
Long term, given that this will give us a great performance gain, we should definitely tackle it. It
also allows us to catch up and thus be consistent with go-libp2p.

## Bitswap implementation
### Bitswap implementation

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|----------|--------|-------------------|---------------------------------------------------|--------------|------------|
Expand All @@ -165,7 +202,7 @@ I would prioritize it below [handshake optimization](#handshake-optimizations) f
convention of improving existing components over introducing new ones. Users have and can implement
their own implementations and are thus not blocked on the rust-libp2p project.

## WebTransport
### WebTransport

| Category | Status | Target Completion | Tracking | Dependencies | Dependents |
|-----------------------------|--------|-------------------|---------------------------------------------------|------------------------------------|------------|
Expand Down