scirs2_metrics/optimization/distributed_advanced/consensus/
proof_of_stake.rs

1//! Proof of Stake Consensus Implementation
2//!
3//! Implementation of Proof of Stake consensus for distributed optimization.
4
5use crate::error::{MetricsError, Result};
6use serde::{Deserialize, Serialize};
7use std::collections::HashMap;
8
9/// Proof of Stake consensus implementation
10#[derive(Debug, Clone, Serialize, Deserialize)]
11pub struct ProofOfStakeConsensus {
12    node_id: String,
13    stake: u64,
14    validators: HashMap<String, u64>,
15    current_epoch: u64,
16}
17
18#[derive(Debug, Clone, Serialize, Deserialize)]
19pub struct Validator {
20    id: String,
21    stake: u64,
22    is_active: bool,
23}
24
25/// Proof of Stake algorithm state
26#[derive(Debug, Clone, Serialize, Deserialize, Default)]
27pub struct PoSState {
28    pub current_epoch: u64,
29    pub validators: HashMap<String, Validator>,
30    pub finalized_blocks: Vec<String>,
31    pub pending_transactions: Vec<String>,
32}
33
34impl ProofOfStakeConsensus {
35    pub fn new(node_id: String, initial_stake: u64) -> Self {
36        let mut validators = HashMap::new();
37        validators.insert(node_id.clone(), initial_stake);
38
39        Self {
40            node_id,
41            stake: initial_stake,
42            validators,
43            current_epoch: 0,
44        }
45    }
46
47    pub fn add_validator(&mut self, validator_id: String, stake: u64) -> Result<()> {
48        self.validators.insert(validator_id, stake);
49        Ok(())
50    }
51
52    pub fn select_validator(&self) -> Result<String> {
53        let total_stake: u64 = self.validators.values().sum();
54        if total_stake == 0 {
55            return Err(MetricsError::InvalidOperation(
56                "No validators with stake".into(),
57            ));
58        }
59
60        // Simple deterministic selection based on stake
61        let mut max_stake = 0;
62        let mut selected = self.node_id.clone();
63
64        for (id, &stake) in &self.validators {
65            if stake > max_stake {
66                max_stake = stake;
67                selected = id.clone();
68            }
69        }
70
71        Ok(selected)
72    }
73
74    pub fn validate_block(&self, validator_id: &str) -> Result<bool> {
75        match self.validators.get(validator_id) {
76            Some(&stake) => Ok(stake > 0),
77            None => Ok(false),
78        }
79    }
80
81    pub fn next_epoch(&mut self) {
82        self.current_epoch += 1;
83    }
84}
scirs2_metrics/optimization/distributed_advanced/consensus/proof_of_stake.rs

scirs2_metrics/optimization/distributed_advanced/consensus/
proof_of_stake.rs
