use {
solana_farm_sdk::program::account,
solana_program::{
account_info::AccountInfo, entrypoint::ProgramResult, msg, program::invoke,
program_error::ProgramError,
},
stable_swap_client::instruction,
};
pub fn remove_liquidity(accounts: &[AccountInfo], amount: u64) -> ProgramResult {
msg!("Processing AmmInstruction::RemoveLiquidity");
msg!("amount {} ", amount);
#[allow(clippy::deprecated_cfg_attr)]
#[cfg_attr(rustfmt, rustfmt_skip)]
if let [
user_account,
user_token_a_account,
user_token_b_account,
user_lp_token_account,
pool_program_id,
pool_token_a_account,
pool_token_b_account,
lp_token_mint,
_spl_token_id,
swap_account,
swap_authority,
fees_account_a,
fees_account_b
] = accounts
{
if &stable_swap_client::id() != pool_program_id.key {
return Err(ProgramError::IncorrectProgramId);
}
if !account::check_token_account_owner(user_token_a_account, user_account.key)?
|| !account::check_token_account_owner(user_token_b_account, user_account.key)?
{
return Err(ProgramError::IllegalOwner);
}
let initial_token_a_user_balance = account::get_token_balance(user_token_a_account)?;
let initial_token_b_user_balance = account::get_token_balance(user_token_b_account)?;
let initial_lp_token_user_balance = account::get_token_balance(user_lp_token_account)?;
let lp_amount = if amount > 0 {
amount
} else {
account::get_token_balance(user_lp_token_account)?
};
let instruction = instruction::withdraw(
&spl_token::id(),
swap_account.key,
swap_authority.key,
user_account.key,
lp_token_mint.key,
user_lp_token_account.key,
pool_token_a_account.key,
pool_token_b_account.key,
user_token_a_account.key,
user_token_b_account.key,
fees_account_a.key,
fees_account_b.key,
lp_amount,
1,
1,
)?;
invoke(&instruction, accounts)?;
account::check_tokens_spent(
user_lp_token_account,
initial_lp_token_user_balance,
lp_amount,
)?;
account::check_tokens_received(user_token_a_account, initial_token_a_user_balance, 1)?;
account::check_tokens_received(user_token_b_account, initial_token_b_user_balance, 1)?;
} else {
return Err(ProgramError::NotEnoughAccountKeys);
}
msg!("AmmInstruction::RemoveLiquidity complete");
Ok(())
}