Implement get_attesters_and_proposer

This commit is contained in:
Paul Hauner 2018-07-12 10:54:43 +10:00
parent 10b2d7407e
commit 4c7b2eec2c

View File

@ -2,6 +2,7 @@ use super::utils::types::{ Sha256Digest };
use super::blake2::{ Blake2s, Digest };
use super::bytes::{ BytesMut, BufMut };
use super::crystallized_state::CrystallizedState;
use super::active_state::ActiveState;
use super::aggregate_vote::AggregateVote;
use super::config::Config;
@ -66,10 +67,43 @@ pub fn get_crosslink_aggvote_msg(
buf.to_vec()
}
// For a given state set and skip_count, return a proposer and set
// of attestors.
pub fn get_attesters_and_proposer(
cry_state: &CrystallizedState,
act_state: &ActiveState,
skip_count: &u64,
config: &Config)
-> (Vec<usize>, usize)
{
let active_validator_count = cry_state.num_active_validators();
assert!(active_validator_count >= 2, "must be >=2 active validators");
let shuffled_validator_indicies = get_shuffling(
&act_state.randao,
&active_validator_count,
config);
let proposer_count: usize = 1;
let ideal_validator_count: usize = (config.attester_count as usize)
+ (*skip_count as usize) + proposer_count;
if ideal_validator_count > active_validator_count {
return (
shuffled_validator_indicies[0..active_validator_count - 1].to_vec(),
shuffled_validator_indicies[active_validator_count - 1]);
} else {
return (
shuffled_validator_indicies[0..ideal_validator_count - 1].to_vec(),
shuffled_validator_indicies[ideal_validator_count - 1]);
}
}
#[cfg(test)]
mod tests {
use super::*;
use super::super::validator_record::ValidatorRecord;
use super::super::utils::types::Address;
use super::super::
utils::test_helpers::get_dangerous_test_keypair;
#[test]
fn test_shuffling_shift_fn() {