spl_token_2022/extension/
permanent_delegate.rs

1#[cfg(feature = "serde-traits")]
2use serde::{Deserialize, Serialize};
3use {
4    crate::extension::{BaseState, BaseStateWithExtensions, Extension, ExtensionType},
5    bytemuck::{Pod, Zeroable},
6    solana_program::pubkey::Pubkey,
7    spl_pod::optional_keys::OptionalNonZeroPubkey,
8};
9
10/// Permanent delegate extension data for mints.
11#[repr(C)]
12#[cfg_attr(feature = "serde-traits", derive(Serialize, Deserialize))]
13#[cfg_attr(feature = "serde-traits", serde(rename_all = "camelCase"))]
14#[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
15pub struct PermanentDelegate {
16    /// Optional permanent delegate for transferring or burning tokens
17    pub delegate: OptionalNonZeroPubkey,
18}
19impl Extension for PermanentDelegate {
20    const TYPE: ExtensionType = ExtensionType::PermanentDelegate;
21}
22
23/// Attempts to get the permanent delegate from the TLV data, returning None
24/// if the extension is not found
25pub fn get_permanent_delegate<S: BaseState, BSE: BaseStateWithExtensions<S>>(
26    state: &BSE,
27) -> Option<Pubkey> {
28    state
29        .get_extension::<PermanentDelegate>()
30        .ok()
31        .and_then(|e| Option::<Pubkey>::from(e.delegate))
32}