Epoch report refactor

Anchor.toml

@@ -20,6 +20,9 @@ wallet = "packages/tests/fixtures/provider.json"
 [scripts]
 test = "packages/tests/run.sh"
 
+[test]
+startup_wait = 3000
+
 [test.validator]
 slots_per_epoch = "32"
 #url = "https://api.mainnet-beta.solana.com"

lib/marinade-common/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "marinade-common"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+anchor-lang = '0.29.0'
+marinade-cpi = { git = "https://github.com/sunrise-stake/anchor-gen", branch = "update/anchor-v0.29" }
+num-traits = "0.2.17"

lib/marinade-common/src/lib.rs

@@ -0,0 +1,95 @@
+pub mod vault_authority_seed;
+
+use marinade_cpi::state::State as MarinadeState;
+use num_traits::{NumCast, PrimInt};
+use std::fmt::Debug;
+use std::ops::{Div, Mul};
+
+/// calculate amount*numerator/denominator
+/// as value  = shares * share_price where share_price=total_value/total_shares
+/// or shares = amount_value / share_price where share_price=total_value/total_shares
+///     => shares = amount_value * 1/share_price where 1/share_price=total_shares/total_value
+pub fn proportional<T>(amount: T, numerator: T, denominator: T) -> T
+where
+    T: PrimInt + Mul<Output = T> + Div<Output = T> + TryInto<i128>,
+    <T as TryInto<i128>>::Error: Debug,
+{
+    proportional_with_rounding(amount, numerator, denominator, RoundingMode::Down)
+}
+
+pub enum RoundingMode {
+    Up,
+    Down,
+}
+
+pub fn proportional_with_rounding<T>(
+    amount: T,
+    numerator: T,
+    denominator: T,
+    rounding_mode: RoundingMode,
+) -> T
+where
+    T: PrimInt + Mul<Output = T> + Div<Output = T> + TryInto<i128>,
+    <T as TryInto<i128>>::Error: Debug,
+{
+    if denominator == T::zero() {
+        return amount;
+    }
+
+    let amount_i128: i128 = amount.try_into().unwrap();
+    let numerator_i128: i128 = numerator.try_into().unwrap();
+    let denominator_i128: i128 = denominator.try_into().unwrap();
+
+    match rounding_mode {
+        RoundingMode::Up => {
+            // Round up by adding (denominator - 1) before dividing
+            let result = (amount_i128 * numerator_i128 + (denominator_i128 - 1)) / denominator_i128;
+            <T as NumCast>::from(result).unwrap()
+        }
+        RoundingMode::Down => {
+            // Default behavior (round down)
+            let result = amount_i128 * numerator_i128 / denominator_i128;
+            <T as NumCast>::from(result).unwrap()
+        }
+    }
+}
+
+// All lifted from https://github.com/marinade-finance/liquid-staking-program/blob/447f9607a8c755cac7ad63223febf047142c6c8f/programs/marinade-finance/src/state.rs#L227
+pub fn calc_msol_from_lamports(marinade_state: &MarinadeState, stake_lamports: u64) -> u64 {
+    proportional(
+        stake_lamports,
+        marinade_state.msol_supply,
+        total_virtual_staked_lamports(marinade_state),
+    )
+}
+pub fn calc_lamports_from_msol_amount(marinade_state: &MarinadeState, msol_amount: u64) -> u64 {
+    proportional(
+        msol_amount,
+        total_virtual_staked_lamports(marinade_state),
+        marinade_state.msol_supply,
+    )
+}
+
+fn total_cooling_down(marinade_state: &MarinadeState) -> u64 {
+    marinade_state
+        .stake_system
+        .delayed_unstake_cooling_down
+        .checked_add(marinade_state.emergency_cooling_down)
+        .expect("Total cooling down overflow")
+}
+
+fn total_lamports_under_control(marinade_state: &MarinadeState) -> u64 {
+    marinade_state
+        .validator_system
+        .total_active_balance
+        .checked_add(total_cooling_down(marinade_state))
+        .expect("Stake balance overflow")
+        .checked_add(marinade_state.available_reserve_balance) // reserve_pda.lamports() - self.rent_exempt_for_token_acc
+        .expect("Total SOLs under control overflow")
+}
+
+fn total_virtual_staked_lamports(marinade_state: &MarinadeState) -> u64 {
+    // if we get slashed it may be negative but we must use 0 instead
+    total_lamports_under_control(marinade_state)
+        .saturating_sub(marinade_state.circulating_ticket_balance) //tickets created -> cooling down lamports or lamports already in reserve and not claimed yet
+}

lib/marinade-common/src/vault_authority_seed.rs

@@ -0,0 +1,33 @@
+use anchor_lang::prelude::{Account, Key};
+use anchor_lang::{AccountDeserialize, AccountSerialize};
+
+// NOTE: this must match the constant used by the programs themselves
+const VAULT_AUTHORITY: &[u8] = b"vault-authority";
+
+pub struct VaultAuthoritySeed<'a> {
+    state_address: Vec<u8>,
+    vault_authority: &'a [u8],
+    bump: Vec<u8>,
+}
+
+pub trait HasVaultAuthority: AccountSerialize + AccountDeserialize + Clone {
+    fn vault_authority_bump(&self) -> u8;
+}
+
+impl<'a> VaultAuthoritySeed<'a> {
+    pub fn new<'info>(state: &'a Account<'info, impl HasVaultAuthority>) -> Self {
+        let state_address = state.key().to_bytes().to_vec();
+        let vault_authority = VAULT_AUTHORITY;
+        let bump = vec![state.vault_authority_bump()];
+
+        VaultAuthoritySeed {
+            state_address,
+            vault_authority,
+            bump,
+        }
+    }
+
+    pub fn as_slices(&self) -> [&[u8]; 3] {
+        [&self.state_address, self.vault_authority, &self.bump]
+    }
+}

package.json

@@ -25,7 +25,7 @@
         "prettier": "^3.0.3",
         "ts-node": "^10.9.1",
         "turbo": "^1.10.16",
-        "typedoc": "^0.25.1",
+        "typedoc": "^0.25.8",
         "typescript": "^5.3.2"
     }
 }