Vault

const STATUS_CAN_STRIP: u8           = 0b0000_0001;
const STATUS_CAN_MERGE: u8           = 0b0000_0010;
const STATUS_CAN_DEPOSIT_YT: u8      = 0b0000_0100;
const STATUS_CAN_WITHDRAW_YT: u8     = 0b0000_1000;
const STATUS_CAN_COLLECT_INTEREST: u8 = 0b0001_0000;
const STATUS_CAN_COLLECT_EMISSIONS: u8 = 0b0010_0000;

pub struct Vault {
    /// Link to SY program
    pub sy_program: Pubkey,

    /// Mint for SY token
    pub mint_sy: Pubkey,

    /// Mint for the vault-specific YT token
    pub mint_yt: Pubkey,

    /// Mint for the vault-specific PT token
    pub mint_pt: Pubkey,

    /// Escrow account for holding deposited YT
    pub escrow_yt: Pubkey,

    /// Escrow account that holds temporary SY tokens
    /// As an interchange between users and the SY program
    pub escrow_sy: Pubkey,

    /// Link to a vault-owned YT position
    /// This account collects yield from all "unstaked" YT
    pub yield_position: Pubkey,

    /// Address lookup table key for vault
    pub address_lookup_table: Pubkey,

    /// Start timestamp
    pub start_ts: u32,

    /// Seconds duration
    pub duration: u32,

    /// Seed for CPI signing
    pub signer_seed: Pubkey,

    /// Authority for CPI signing
    pub authority: Pubkey,

    /// Bump for signer authority PDA
    pub signer_bump: [u8; 1],

    /// Last seen SY exchange rate
    /// Continues to be updated after vault maturity to track SY appreciation
    pub last_seen_sy_exchange_rate: Number,

    /// All time high exchange rate for SY
    pub all_time_high_sy_exchange_rate: Number,

    /// Exchange rate for SY when the vault expires
    pub final_sy_exchange_rate: Number,

    /// How much SY is held in escrow
    pub total_sy_in_escrow: u64,

    /// Total SY set aside to back PT holders
    pub sy_for_pt: u64,

    /// Total supply of PT
    pub pt_supply: u64,

    /// Amount of SY staged for the treasury
    pub treasury_sy: u64,

    /// SY earned by YT but not yet collected
    pub uncollected_sy: u64,

    /// Treasury SY token account address
    pub treasury_sy_token_account: Pubkey,

    /// Interest fee in basis points
    pub interest_bps_fee: u16,

    /// Minimum operation size for stripping
    pub min_op_size_strip: u64,

    /// Minimum operation size for merging
    pub min_op_size_merge: u64,

    /// Status flags bitmask
    pub status: u8,

    /// Emission reward configurations
    pub emissions: Vec<EmissionInfo>,

    /// CPI account configuration for SY program
    pub cpi_accounts: CpiAccounts,

    /// Claim rate limiting configuration
    pub claim_limits: ClaimLimits,

    /// Maximum PT + YT supply
    pub max_py_supply: u64,
}

pub struct EmissionInfo {
    /// Token account for the emission (vault authority owned)
    pub token_account: Pubkey,

    /// Initial index when emission was added
    pub initial_index: Number,

    /// Most recently observed emission index from SY state
    pub last_seen_index: Number,

    /// Last claimable index after vault expires
    pub final_index: Number,

    /// Treasury token account for this reward
    pub treasury_token_account: Pubkey,

    /// Fee taken from emission collecting (basis points)
    pub fee_bps: u16,

    /// Accumulated treasury emission rewards
    pub treasury_emission: u64,
}

pub struct ClaimLimits {
    /// Start timestamp of the current claim window
    pub claim_window_start_timestamp: u32,

    /// Total amount claimed in current window
    pub total_claim_amount_in_window: u64,

    /// Maximum claim amount allowed per window
    pub max_claim_amount_per_window: u64,

    /// Duration of each claim window in seconds
    pub claim_window_duration_seconds: u32,
}