Binary Field Encodings (BFE) for Secure Scuttlebutt (SSB).

Based on the JavaScript reference implementation: ssb-bfe (written according to the specification).

While encode() and decode() are the two primary functions exposed by this crate, the various helper functions and values are also exported for public use.

The encoder expects JSON input in the form of a serde_json::Value enum. The encoded value is returned as an BfeValue (a custom enum provided by this library).

The decoder expects input in the form of an BfeValue (a custom enum provided by this library). The decoded value is returned as JSON in the form of a serde_json::Value enum.

Deserialize and Serialize traits have been derived for BfeValue, meaning that encoded JSON objects can be parsed into the BfeValue type if required (for example, if the value is received as a byte slice of serialized JSON data). See the serde documentation on Parsing JSON as strongly typed data structures for an example and further explanation.

use ssb_bfe_rs;
use serde_json::json;

let value = json!({
    "author": "@6CAxOI3f+LUOVrbAl0IemqiS7ATpQvr9Mdw9LC4+Uv0=.bbfeed-v1",
    "previous": "%R8heq/tQoxEIPkWf0Kxn1nCm/CsxG2CDpUYnAvdbXY8=.bbmsg-v1"
});

let encoded = ssb_bfe_rs::encode(&value)?;
println!("{:X?}", encoded);

// Object({"author": Buffer([0, 3, E8, 20, 31, 38, 8D, DF, F8, B5, E, 56, B6, C0, 97, 42, 1E, 9A, A8, 92, EC, 4, E9, 42, FA, FD, 31, DC, 3D, 2C, 2E, 3E, 52, FD]), "previous": Buffer([1, 4, 47, C8, 5E, AB, FB, 50, A3, 11, 8, 3E, 45, 9F, D0, AC, 67, D6, 70, A6, FC, 2B, 31, 1B, 60, 83, A5, 46, 27, 2, F7, 5B, 5D, 8F])})

let decoded = ssb_bfe_rs::decode(&encoded_value)?;
println!("{:?}", decoded);

// Object({"author": String("@6CAxOI3f+LUOVrbAl0IemqiS7ATpQvr9Mdw9LC4+Uv0=.bbfeed-v1"), "previous": String("%R8heq/tQoxEIPkWf0Kxn1nCm/CsxG2CDpUYnAvdbXY8=.bbmsg-v1")})

Use cargo doc to generate and serve the Rust documentation for this library:

git clone git@github.com:ssb-ngi-pointer/ssb-bfe-rs.git
cd ssb-bfe-rs
cargo doc --no-deps --open 

LGPL-3.0.