pub unsafe fn line_keylet(
_account1_ptr: *const u8,
_account1_len: usize,
_account2_ptr: *const u8,
_account2_len: usize,
_currency_ptr: *const u8,
_currency_len: usize,
_out_buff_ptr: *mut u8,
_out_buff_len: usize,
) -> i32