use {
solana_farm_sdk::program::{account, protocol::saber},
solana_program::{
account_info::AccountInfo,
entrypoint::ProgramResult,
hash::Hasher,
instruction::{AccountMeta, Instruction},
msg,
program::invoke,
program_error::ProgramError,
},
};
pub fn unstake(accounts: &[AccountInfo], amount: u64) -> ProgramResult {
msg!("Processing AmmInstruction::Unstake");
msg!("amount {} ", amount);
#[allow(clippy::deprecated_cfg_attr)]
#[cfg_attr(rustfmt, rustfmt_skip)]
if let [
user_account,
user_lp_token_account,
farm_program_id,
_spl_token_id,
miner,
miner_vault,
quarry,
rewarder
] = accounts
{
if &quarry_mine::id() != farm_program_id.key {
return Err(ProgramError::IncorrectProgramId);
}
if !account::check_token_account_owner(user_lp_token_account, user_account.key)? {
return Err(ProgramError::IllegalOwner);
}
let initial_lp_token_user_balance = account::get_token_balance(user_lp_token_account)?;
let lp_amount = if amount > 0 {
amount
} else {
saber::get_stake_account_balance(miner)?
};
let mut hasher = Hasher::default();
hasher.hash(b"global:withdraw_tokens");
let mut data = hasher.result().as_ref()[..8].to_vec();
data.extend_from_slice(&lp_amount.to_le_bytes());
let saber_accounts = vec![
AccountMeta::new_readonly(*user_account.key, true),
AccountMeta::new(*miner.key, false),
AccountMeta::new(*quarry.key, false),
AccountMeta::new(*miner_vault.key, false),
AccountMeta::new(*user_lp_token_account.key, false),
AccountMeta::new_readonly(spl_token::id(), false),
AccountMeta::new_readonly(*rewarder.key, false),
];
let instruction = Instruction {
program_id: quarry_mine::id(),
accounts: saber_accounts,
data,
};
invoke(&instruction, accounts)?;
account::check_tokens_received(
user_lp_token_account,
initial_lp_token_user_balance,
lp_amount,
)?;
} else {
return Err(ProgramError::NotEnoughAccountKeys);
}
msg!("AmmInstruction::Unstake complete");
Ok(())
}