# instant-acme: async, pure-Rust ACME client

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instant-acme is an async, pure-Rust ACME (RFC 8555) client.

instant-acme is used in production at [Instant Domains](https://instantdomains.com/) to help
us provision TLS certificates within seconds for our customers. instant-acme relies
on Tokio and rustls to implement the [RFC 8555](https://www.rfc-editor.org/rfc/rfc8555.html)
specification.

## Features

* Store/recover your account credentials by serializing/deserializing
* Fully async implementation with tracing support
* Support for processing multiple orders concurrently
* Support for external account binding
* Support for certificate revocation
* Uses hyper with rustls and Tokio for HTTP requests
* Uses *ring* for ECDSA signing
* Minimum supported Rust version: 1.60

## Limitations

* Only tested with DNS challenges against Let's Encrypt (staging and production) and ZeroSSL (production) so far 
* Only supports ECDSA keys for now

## Getting started

See the [examples](examples) directory for an example of how to use instant-acme.