safe_token_2022/extension/
permanent_delegate.rs

1use {
2    crate::{
3        extension::{BaseState, BaseStateWithExtensions, Extension, ExtensionType},
4        pod::*,
5    },
6    bytemuck::{Pod, Zeroable},
7    solana_program::pubkey::Pubkey,
8};
9
10/// Permanent delegate extension data for mints.
11#[repr(C)]
12#[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
13pub struct PermanentDelegate {
14    /// Optional permanent delegate for transferring or burning tokens
15    pub delegate: OptionalNonZeroPubkey,
16}
17impl Extension for PermanentDelegate {
18    const TYPE: ExtensionType = ExtensionType::PermanentDelegate;
19}
20
21/// Attempts to get the permanent delegate from the TLV data, returning None
22/// if the extension is not found
23pub fn get_permanent_delegate<S: BaseState, BSE: BaseStateWithExtensions<S>>(
24    state: &BSE,
25) -> Option<Pubkey> {
26    state
27        .get_extension::<PermanentDelegate>()
28        .ok()
29        .and_then(|e| Option::<Pubkey>::from(e.delegate))
30}