Logic

The logic module contains general program logic that is not more directly associated with process, state or token functionality.

Functions#

check_rent_exempt#

This function checks the balance of account in lamports, along with the data length to determine if the account is rent exempt.

pub(crate) fn check_rent_exempt(
    rent: &Rent,
    account_info: &AccountInfo,
    account_name: &'static str,
) -> Result<(), ProgramError> {

get_reserve_available_amount#

This function gets the amount of lamports in reserve. The rent is subtracted from the total amount.

pub fn get_reserve_available_amount(
    reserve_account: &AccountInfo,
    sysvar_rent: &Rent,
) -> Result<Lamports, LidoError> {

Note: this function will fail if the reserve's balance minus rent is < 0.

calc_total_lamports#

Calculates the sum of lamports available in the reserve (after rent us discounted) and the stake pool

pub fn calc_total_lamports(
    lido: &Lido,
    reserve_account: &AccountInfo,
    sysvar_rent: &Rent,
) -> Result<Lamports, LidoError> {

token_mint_to#

Creates and issues a spl_token MintTo instructioni from the Solana SPL token library program.

pub fn token_mint_to<'a>(
    lido: &Pubkey,
    token_program: AccountInfo<'a>,
    mint: AccountInfo<'a>,
    destination: AccountInfo<'a>,
    authority: AccountInfo<'a>,
    authority_type: &[u8],
    bump_seed: u8,
    amount: StLamports,
) -> Result<(), ProgramError> {

deserialize_lido#

This function first checks the the lido account is indeed the owner and then deserializes the lido data into the Lido struct.

pub fn deserialize_lido(program_id: &Pubkey, lido: &AccountInfo) -> Result<Lido, ProgramError>