Daphne

Daphne is a Rust implementation of the Distributed Aggregation Protocol (DAP) standard. DAP is under active development in the PPM working group of the IETF.

Daphne currently implements:

• draft-ietf-ppm-dap-09
  • Prio3: draft-irtf-cfrg-vdaf-08
  • Taskprov extension: draft-wang-ppm-dap-taskprov-06
  • Interop test API: draft-dcook-ppm-dap-interop-test-design-07

The repository contains a number of crates. The main one, daphne, implements the core DAP protocol logic for Clients, Aggregators, and Collectors. This crate does not provide the complete, end-to-end functionality of any party. Instead, it defines traits for the functionalities that a concrete instantiation of the protocol is required to implement. We call these functionalities "roles".

The remaining crates are not intended for general use:

• daphne-server, daphne-worker, daphne-service-utils -- Components of Cloudflare's backend for its DAP deployments. These crates are not intended for general use.

• daphne-worker-test -- Integration tests for daphne and Cloudflare's backend.

• dapf (short for "DAP Functions") -- CLI for interacting with DAP deployments. Some of its features are specific to Cloudflare's own deployment.

Requirements

Cap'n Proto is required to build DAP.

# debian
apt install capnproto

# macos
brew install capnp

Testing

The daphne crate relies on unit tests. To test integration with Cloudflare's backend, run make e2e.