dloom_flow/amm/state/
pool.rs

1// FILE: programs/dloom_flow/src/state/amm_pool.rs
2
3use anchor_lang::prelude::*;
4
5/// State for a permissionless, constant-product AMM pool.
6///
7/// Follows the x * y = k model.
8#[account]
9#[derive(Default, Debug)]
10pub struct AmmPool {
11    /// The PDA bump.
12    pub bump: u8,
13
14    /// The authority that can update protocol fees or other admin-only parameters.
15    /// Can be a multi-sig or DAO.
16    pub authority: Pubkey,
17
18    // --- Mint and Vault Keys ---
19    pub token_a_mint: Pubkey,
20    pub token_b_mint: Pubkey,
21    pub token_a_vault: Pubkey,
22    pub token_b_vault: Pubkey,
23    pub lp_mint: Pubkey,
24
25    // --- Fee Parameters ---
26    pub fee_rate: u16,
27    pub protocol_fee_share: u16,
28    pub referrer_fee_share: u16,
29    pub protocol_fee_vault_a: Pubkey,
30    pub protocol_fee_vault_b: Pubkey,
31
32    // --- Liquidity State ---
33    pub reserves_a: u64,
34    pub reserves_b: u64,
35
36    // --- Fee Growth Accumulators (NEW) ---
37    /// Total fees of token A accrued per LP token.
38    pub fee_growth_per_lp_token_a: u128,
39    /// Total fees of token B accrued per LP token.
40    pub fee_growth_per_lp_token_b: u128,
41    
42    // --- Oracle Fields ---
43    /// The cumulative price of token A in terms of token B.
44    pub price_a_cumulative: u128,
45    /// The cumulative price of token B in terms of token A.
46    pub price_b_cumulative: u128,
47    /// The timestamp of the last update to the reserves and oracle.
48    pub last_update_timestamp: i64,
49    pub last_fee_update_timestamp: i64,
50    /// Snapshot of the cumulative price at the last fee update, used for volatility calculation.
51    pub price_a_cumulative_last_fee_update: u128,
52}
dloom_flow/amm/state/pool.rs

dloom_flow/amm/state/
pool.rs
