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claim_rewards.rs
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claim_rewards.rs
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//! Claim rewards of a stake account
//! This instruction can be used by stakers to claim their staking rewards
use std::convert::TryInto;
use bonfida_utils::{BorshSize, InstructionsAccount};
use borsh::{BorshDeserialize, BorshSerialize};
use solana_program::{
account_info::{AccountInfo, next_account_info},
entrypoint::ProgramResult,
msg,
program_error::ProgramError,
program_pack::Pack,
pubkey::Pubkey,
};
use solana_program::program::invoke_signed;
use spl_token::{instruction::mint_to, state::Account};
use crate::error::AccessError;
use crate::instruction::ProgramInstruction::ClaimRewards;
use crate::state::{ACCESS_NFT_PROGRAM_SIGNER, StakeAccount, StakePool, Tag};
use crate::state::{CentralStateV2, RoyaltyAccount};
use crate::utils::{
calc_reward_fp32, check_account_key, check_account_owner,
check_signer, retrieve_royalty_account,
};
#[derive(BorshDeserialize, BorshSerialize, BorshSize)]
/// The required parameters for the `claim_rewards` instruction
pub struct Params {
// Should be false by default
pub allow_zero_rewards: bool,
}
#[derive(InstructionsAccount)]
/// The required accounts for the `claim_rewards` instruction
pub struct Accounts<'a, T> {
/// The stake pool account
#[cons(writable)]
pub stake_pool: &'a T,
/// The stake account
#[cons(writable)]
pub stake_account: &'a T,
/// The owner of the Stake account
#[cons(signer)]
pub owner: &'a T,
/// The rewards destination
#[cons(writable)]
pub rewards_destination: &'a T,
/// The central state account
pub central_state: &'a T,
/// The mint address of the ACS token
#[cons(writable)]
pub mint: &'a T,
/// The Access NFT program signer - to handle different royalty account
pub access_nft_signer: &'a T,
/// The SPL token program account
pub spl_token_program: &'a T,
/// The owner's royalty split account to check if royalties need to be paid
pub owner_royalty_account: &'a T,
/// The royalty ATA account
#[cons(writable)]
pub royalty_ata: Option<&'a T>,
}
impl<'a, 'b: 'a> Accounts<'a, AccountInfo<'b>> {
pub fn parse(
accounts: &'a [AccountInfo<'b>],
program_id: &Pubkey,
) -> Result<Self, ProgramError> {
let accounts_iter = &mut accounts.iter();
let accounts = Accounts {
stake_pool: next_account_info(accounts_iter)?,
stake_account: next_account_info(accounts_iter)?,
owner: next_account_info(accounts_iter)?,
rewards_destination: next_account_info(accounts_iter)?,
central_state: next_account_info(accounts_iter)?,
mint: next_account_info(accounts_iter)?,
access_nft_signer: next_account_info(accounts_iter)?,
spl_token_program: next_account_info(accounts_iter)?,
owner_royalty_account: next_account_info(accounts_iter)?,
royalty_ata: next_account_info(accounts_iter).ok(),
};
// Check keys
check_account_key(
accounts.spl_token_program,
&spl_token::ID,
AccessError::WrongSplTokenProgramId,
)?;
check_account_key(
accounts.access_nft_signer,
&ACCESS_NFT_PROGRAM_SIGNER,
AccessError::WrongAccessCnftAuthority,
)?;
// Check ownership
check_account_owner(
accounts.stake_pool,
program_id,
AccessError::WrongStakePoolAccountOwner,
)?;
check_account_owner(
accounts.stake_account,
program_id,
AccessError::WrongStakeAccountOwner,
)?;
check_account_owner(
accounts.rewards_destination,
&spl_token::ID,
AccessError::WrongOwner,
)?;
check_account_owner(accounts.central_state, program_id, AccessError::WrongOwner)?;
check_account_owner(accounts.mint, &spl_token::ID, AccessError::WrongOwner)?;
// Check signers
check_signer(accounts.owner, AccessError::StakeAccountOwnerMustSign)?;
Ok(accounts)
}
}
pub fn process_claim_rewards(
program_id: &Pubkey,
accounts: &[AccountInfo],
params: Params,
) -> ProgramResult {
let accounts = Accounts::parse(accounts, program_id)?;
let central_state = CentralStateV2::from_account_info(accounts.central_state)?;
central_state.assert_instruction_allowed(&ClaimRewards)?;
let stake_pool = StakePool::get_checked(accounts.stake_pool, vec![Tag::StakePool])?;
let mut stake_account = StakeAccount::from_account_info(accounts.stake_account)?;
let destination_token_acc = Account::unpack(&accounts.rewards_destination.data.borrow())?;
if destination_token_acc.mint != central_state.token_mint {
msg!("Invalid ACCESS mint");
#[cfg(not(feature = "no-mint-check"))]
return Err(AccessError::WrongMint.into());
}
msg!("Token account owner: {}", destination_token_acc.owner);
// We only allow custom royalty account and unchecked destination account when this is a CPI call from the NFT program.
if !accounts.access_nft_signer.is_signer {
let (derived_key, _) = RoyaltyAccount::create_key(accounts.owner.key, program_id);
check_account_key(
accounts.owner_royalty_account,
&derived_key,
AccessError::AccountNotDeterministic,
)?;
}
let royalty_account_data = retrieve_royalty_account(
accounts.owner_royalty_account,
accounts.royalty_ata,
)?;
check_account_key(
accounts.stake_pool,
&stake_account.stake_pool,
AccessError::WrongStakePool,
)?;
check_account_key(
accounts.owner,
&stake_account.owner,
AccessError::StakeAccountOwnerMismatch,
)?;
check_account_key(
accounts.mint,
¢ral_state.token_mint,
AccessError::WrongMint,
)?;
// Calculate the rewards (checks if the pool is cranked as well)
let mut reward = calc_reward_fp32(
central_state.last_snapshot_offset,
stake_account.last_claimed_offset,
&stake_pool,
true,
params.allow_zero_rewards,
)?
// Multiply by the staker shares of the total pool
.checked_mul(stake_account.stake_amount as u128)
.map(|r| ((r >> 31) + 1) >> 1)
.ok_or(AccessError::Overflow)?
.try_into()
.map_err(|_| AccessError::Overflow)?;
// split the rewards if there is a royalty account
let mut royalty_amount = 0;
if let Some(royalty_account) = royalty_account_data {
royalty_amount = royalty_account.calculate_royalty_amount(reward)?;
reward = reward.checked_sub(royalty_amount).ok_or(AccessError::Overflow)?;
}
msg!("Claiming rewards {}, royalties {}", reward, royalty_amount);
// Mint rewards
let mint_rewards_ix = mint_to(
&spl_token::ID,
accounts.mint.key,
accounts.rewards_destination.key,
accounts.central_state.key,
&[],
reward,
)?;
invoke_signed(
&mint_rewards_ix,
&[
accounts.spl_token_program.clone(),
accounts.mint.clone(),
accounts.central_state.clone(),
accounts.rewards_destination.clone(),
],
&[&[&program_id.to_bytes(), &[central_state.bump_seed]]],
)?;
// Mint royalties
if royalty_amount > 0 {
let mint_royalty_ix = mint_to(
&spl_token::ID,
accounts.mint.key,
accounts.royalty_ata.unwrap().key,
accounts.central_state.key,
&[],
royalty_amount,
)?;
invoke_signed(
&mint_royalty_ix,
&[
accounts.spl_token_program.clone(),
accounts.mint.clone(),
accounts.central_state.clone(),
accounts.royalty_ata.unwrap().clone(),
],
&[&[&program_id.to_bytes(), &[central_state.bump_seed]]],
)?;
}
// Update states
stake_account.last_claimed_offset = central_state.last_snapshot_offset;
stake_account.save(&mut accounts.stake_account.data.borrow_mut())?;
Ok(())
}