spl_token_2022_interface/extension/memo_transfer/
mod.rs

1#[cfg(feature = "serde")]
2use serde::{Deserialize, Serialize};
3use {
4    crate::extension::{BaseState, BaseStateWithExtensions, Extension, ExtensionType},
5    bytemuck::{Pod, Zeroable},
6    spl_pod::primitives::PodBool,
7};
8
9/// Memo Transfer extension instructions
10pub mod instruction;
11
12/// Memo Transfer extension for Accounts
13#[repr(C)]
14#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
15#[cfg_attr(feature = "serde", serde(rename_all = "camelCase"))]
16#[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
17pub struct MemoTransfer {
18    /// Require transfers into this account to be accompanied by a memo
19    pub require_incoming_transfer_memos: PodBool,
20}
21impl Extension for MemoTransfer {
22    const TYPE: ExtensionType = ExtensionType::MemoTransfer;
23}
24
25/// Determine if a memo is required for transfers into this account
26pub fn memo_required<BSE: BaseStateWithExtensions<S>, S: BaseState>(account_state: &BSE) -> bool {
27    if let Ok(extension) = account_state.get_extension::<MemoTransfer>() {
28        return extension.require_incoming_transfer_memos.into();
29    }
30    false
31}