mpc_engine/
utils.rs

1//! Utility functions for the MPC specification.
2
3use crate::broadcast::BroadcastRelay;
4use crate::messages::Message;
5use crate::party::ChannelConfig;
6use std::sync::mpsc::{channel, Receiver, Sender};
7
8/// Set up channel configurations for parties. Returns a vector of Channel Configurations.
9pub fn set_up_channels(n: usize) -> (BroadcastRelay, Vec<ChannelConfig>) {
10    let party_channels = (0..n)
11        .map(|id| (id, channel()))
12        .collect::<Vec<(usize, (Sender<Message>, Receiver<Message>))>>();
13
14    let parties_tx: Vec<Sender<Message>> = party_channels
15        .iter()
16        .map(|(_, (tx, _))| tx.clone())
17        .collect();
18
19    let evaluator = party_channels[0].1 .0.clone();
20    let (broadcast_sender, broadcast_receiver) = channel::<Message>();
21
22    let channel_configs: Vec<ChannelConfig> = party_channels
23        .into_iter()
24        .map(|(id, (_tx, rx))| ChannelConfig {
25            id,
26            listen: rx,
27            parties: parties_tx.clone(),
28            evaluator: evaluator.clone(),
29            broadcast: broadcast_sender.clone(),
30        })
31        .collect();
32
33    let broadcast_channels = BroadcastRelay::new(broadcast_receiver, parties_tx.clone());
34
35    (broadcast_channels, channel_configs)
36}
37
38pub(crate) fn ith_bit(i: usize, bytes: &[u8]) -> bool {
39    let byte_index = i / 8;
40    let bit_index = 7 - i % 8;
41    ((bytes[byte_index] >> bit_index) & 1u8) == 1u8
42}
mpc_engine/utils.rs

mpc_engine/
utils.rs
