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governance/tools/
pack.rs

1//! General purpose packing utility functions
2
3use {
4    arrayref::array_refs,
5    solana_program::{program_error::ProgramError, program_option::COption, pubkey::Pubkey},
6};
7
8/// Unpacks COption from a slice
9pub fn unpack_coption_pubkey(src: &[u8; 36]) -> Result<COption<Pubkey>, ProgramError> {
10    let (tag, body) = array_refs![src, 4, 32];
11    match *tag {
12        [0, 0, 0, 0] => Ok(COption::None),
13        [1, 0, 0, 0] => Ok(COption::Some(Pubkey::new_from_array(*body))),
14        _ => Err(ProgramError::InvalidAccountData),
15    }
16}