lib.rs

//! This example demonstrates the use of the `anchor_spl::token` CPI client to freeze account.

use anchor_lang::prelude::*;
use anchor_spl::token::{self, SetAuthority};

declare_id!("Fg6PaFpoGXkYsidMpWTK6W2BeZ7FEfcYkg476zPFsLnS");

#[program]
mod token_proxy {
    use super::*;

    pub fn proxy_set_authority(
        ctx: Context<ProxySetAuthority>,
        authority_type: AuthorityType,
        new_authority: Option<Pubkey>,
    ) -> ProgramResult {
        token::set_authority(ctx.accounts.into(), authority_type.into(), new_authority)
    }
}

#[derive(AnchorSerialize, AnchorDeserialize)]
pub enum AuthorityType {
    /// Authority to mint new tokens
    MintTokens,
    /// Authority to freeze any account associated with the Mint
    FreezeAccount,
    /// Owner of a given token account
    AccountOwner,
    /// Authority to close a token account
    CloseAccount,
}

impl From<AuthorityType> for spl_token::instruction::AuthorityType {
    fn from(authority_ty: AuthorityType) -> spl_token::instruction::AuthorityType {
        match authority_ty {
            AuthorityType::FreezeAccount => spl_token::instruction::AuthorityType::FreezeAccount
        }
    }
}