## 0.48.0

- Raise MSRV to 1.88.0.
  See [PR 6273](https://github.com/libp2p/rust-libp2p/pull/6273).

## 0.47.0

<!-- Update to libp2p-swarm v0.47.0 -->

## 0.46.0

- Deprecate `void` crate.
  See [PR 5676](https://github.com/libp2p/rust-libp2p/pull/5676).

<!-- Update to libp2p-core v0.43.0 -->

## 0.45.0

<!-- Update to libp2p-swarm v0.45.0 -->

## 0.44.2

- Use `web-time` instead of `instant`.
  See [PR 5347](https://github.com/libp2p/rust-libp2p/pull/5347).

- Fix panic in WASM caused by retrying on dial upgrade errors.
  See [PR 5447](https://github.com/libp2p/rust-libp2p/pull/5447).

## 0.44.1

- Impose `Sync` on `ping::Failure::Other`.
  `ping::Event` can now be shared between threads.
  See [PR 5250]

[PR 5250]: https://github.com/libp2p/rust-libp2p/pull/5250

## 0.44.0


## 0.43.1

- Honor ping interval in case of errors.
  Previously, we would immediately open another ping stream if the current one failed.
  See [PR 4423].

[PR 4423]: https://github.com/libp2p/rust-libp2p/pull/4423

## 0.43.0

- Raise MSRV to 1.65.
  See [PR 3715].

- Remove deprecated items. See [PR 3702].

- Don't close connections on ping failures.
  To restore the previous behaviour, users should call `Swarm::close_connection` upon receiving a `ping::Event` with a `ping::Failure`.
  This also removes the `max_failures` config option.
  See [PR 3947].

[PR 3715]: https://github.com/libp2p/rust-libp2p/pull/3715
[PR 3702]: https://github.com/libp2p/rust-libp2p/pull/3702
[PR 3947]: https://github.com/libp2p/rust-libp2p/pull/3947

## 0.42.0

- Update to `libp2p-core` `v0.39.0`.

- Update to `libp2p-swarm` `v0.42.0`.

## 0.41.0

- Update to `libp2p-core` `v0.38.0`.

- Update to `libp2p-swarm` `v0.41.0`.

- Replace `Behaviour`'s `NetworkBehaviour` implementation `inject_*` methods with the new `on_*` methods.
  See [PR 3011].

- Replace `Handler`'s `ConnectionHandler` implementation `inject_*` methods with the new `on_*` methods.
  See [PR 3085].

- Update `rust-version` to reflect the actual MSRV: 1.62.0. See [PR 3090].

[PR 3085]: https://github.com/libp2p/rust-libp2p/pull/3085
[PR 3011]: https://github.com/libp2p/rust-libp2p/pull/3011
[PR 3090]: https://github.com/libp2p/rust-libp2p/pull/3090

## 0.40.0

- Bump rand to 0.8 and quickcheck to 1. See [PR 2857].
- Deprecate types with `Ping` prefix. Prefer importing them via the `ping` namespace, i.e. `libp2p::ping::Event` instead
  of `libp2p::ping::PingEvent`. See [PR 2937].

- Update to `libp2p-core` `v0.37.0`.

- Update to `libp2p-swarm` `v0.40.0`.

- Deprecate `Config::with_keep_alive`. See [PR 2859].

[PR 2857]: https://github.com/libp2p/rust-libp2p/pull/2857
[PR 2937]: https://github.com/libp2p/rust-libp2p/pull/2937
[PR 2859]: https://github.com/libp2p/rust-libp2p/pull/2859/

## 0.39.0

- Update to `libp2p-swarm` `v0.39.0`.

- Update to `libp2p-core` `v0.36.0`.

## 0.38.0

- Update to `libp2p-swarm` `v0.38.0`.

- Expose `PROTOCOL_NAME`. See [PR 2734].

- Update to `libp2p-core` `v0.35.0`.

[PR 2734]: https://github.com/libp2p/rust-libp2p/pull/2734/

## 0.37.0

- Update to `libp2p-core` `v0.34.0`.

- Update to `libp2p-swarm` `v0.37.0`.

## 0.36.0

- Update to `libp2p-core` `v0.33.0`.

- Update to `libp2p-swarm` `v0.36.0`.

## 0.35.0

- Update to `libp2p-swarm` `v0.35.0`.

## 0.34.0 [2022-02-22]

- Update to `libp2p-core` `v0.32.0`.

- Update to `libp2p-swarm` `v0.34.0`.

- Merge NetworkBehaviour's inject_\* paired methods (see PR 2445).

[PR 2445]: https://github.com/libp2p/rust-libp2p/pull/2445

## 0.33.0 [2022-01-27]

- Update dependencies.

- Migrate to Rust edition 2021 (see [PR 2339]).

[PR 2339]: https://github.com/libp2p/rust-libp2p/pull/2339

## 0.32.0 [2021-11-16]

- Use `instant` and `futures-timer` instead of `wasm-timer` (see [PR 2245]).

- Update dependencies.

[PR 2245]: https://github.com/libp2p/rust-libp2p/pull/2245

## 0.31.0 [2021-11-01]

- Make default features of `libp2p-core` optional.
  [PR 2181](https://github.com/libp2p/rust-libp2p/pull/2181)

- Update dependencies.

- Don't close connection if ping protocol is unsupported by remote.
  Previously, a failed protocol negotiation for ping caused a force close of the connection.
  As a result, all nodes in a network had to support ping.
  To allow networks where some nodes don't support ping, we now emit
  `PingFailure::Unsupported` once for every connection on which ping is not supported.

  In case you want to stick with the old behavior, you need to close the connection
  manually on `PingFailure::Unsupported`.

  Fixes [#2109](https://github.com/libp2p/rust-libp2p/issues/2109). Also see [PR 2149].

  [PR 2149]: https://github.com/libp2p/rust-libp2p/pull/2149/

- Rename types as per [discussion 2174].
  `Ping` has been renamed to `Behaviour`.
  The `Ping` prefix has been removed from various types like `PingEvent`.
  Users should prefer importing the ping protocol as a module (`use libp2p::ping;`),
  and refer to its types via `ping::`. For example: `ping::Behaviour` or `ping::Event`.

  [discussion 2174]: https://github.com/libp2p/rust-libp2p/discussions/2174

## 0.30.0 [2021-07-12]

- Update dependencies.

## 0.29.0 [2021-04-13]

- Update `libp2p-swarm`.

## 0.28.0 [2021-03-17]

- Update `libp2p-swarm`.

## 0.27.0 [2021-01-12]

- Update dependencies.

## 0.26.0 [2020-12-17]

- Update `libp2p-swarm` and `libp2p-core`.

## 0.25.0 [2020-11-25]

- Update `libp2p-swarm` and `libp2p-core`.

## 0.24.0 [2020-11-09]

- Update dependencies.

## 0.23.0 [2020-10-16]

- Update `libp2p-swarm` and `libp2p-core`.

- Ensure the outbound ping is flushed before awaiting
  the response. Otherwise the behaviour depends on
  implementation details of the stream muxer used.
  The current behaviour resulted in stalls with Mplex.

## 0.22.0 [2020-09-09]

- Update `libp2p-swarm` and `libp2p-core`.

## 0.21.0 [2020-08-18]

- Refactor the ping protocol for conformity by (re)using
a single substream for outbound pings, addressing
[#1601](https://github.com/libp2p/rust-libp2p/issues/1601).

- Bump `libp2p-core` and `libp2p-swarm` dependencies.

## 0.20.0 [2020-07-01]

- Updated dependencies.

## 0.19.3 [2020-06-22]

- Updated dependencies.

## 0.19.2 [2020-06-18]

- Close substream in inbound upgrade
  [PR 1606](https://github.com/libp2p/rust-libp2p/pull/1606).
