使用anchor丢弃freeze权限
这篇介绍丢弃freeze权限，这是常用的指令。
注意：如果丢弃freeze权限，已经被freeze的token account将永远被冻结，无法从中转币。
创建指令
在instructions中添加revoke_freeze_authority.rs，并粘贴以下代码：
use anchor_lang::prelude::*;
use anchor_spl::token::{spl_token, Mint, SetAuthority, Token};
use anchor_spl::token::spl_token::instruction::AuthorityType;
use crate::constants::MINT_SEEDS;
use crate::errors::ErrorCode;
#[derive(Accounts)]
#[instruction(token_name: String, token_symbol: String)]
pub struct RevokeFreezeAuthority<'info> {
#[account(
mut,
seeds = [MINT_SEEDS.as_bytes(), token_name.as_bytes(), token_symbol.as_bytes()],
bump
)]
pub mint: Account<'info, Mint>,
pub token_program: Program<'info, Token>,
}
impl<'info> RevokeFreezeAuthority<'info> {
pub fn revoke_freeze_authority(ctx: Context<RevokeFreezeAuthority>, token_name: String, token_symbol: String) -> Result<()> {
require!(spl_token::ID == ctx.accounts.token_program.key(), ErrorCode::WrongTokenProgram);
if ctx.accounts.mint.freeze_authority.is_some() {
let seeds = &[MINT_SEEDS.as_bytes(), token_name.as_bytes(), token_symbol.as_bytes(), &[ctx.bumps.mint]];
let signer = [&seeds[..]];
anchor_spl::token::set_authority(
CpiContext::new_with_signer(
ctx.accounts.token_program.to_account_info(),
SetAuthority {
current_authority: ctx.accounts.mint.to_account_info(),
account_or_mint: ctx.accounts.mint.to_account_info(),
},
&signer,
),
AuthorityType::FreezeAccount,
None,
).map_err(|e| {
msg!("Revoke freeze authority failed: {}", e);
e
})?;
msg!("Revoke freeze authority successfully.");
}
Ok(())
}
}
在lib.rs中调用上面的指令
pub fn revoke_freeze_authority(ctx: Context<RevokeFreezeAuthority>, token_name: String, token_symbol: String) -> Result<()> {
RevokeFreezeAuthority::revoke_freeze_authority(ctx, token_name, token_symbol)
}
编译部署
anchor build && anchor deploy
编写测试代码
it("revoke freeze authority", async () => {
// Prepare context for revoking freeze authority
const context = {
mint: mintAccount,
payer: deployerAccount.publicKey,
tokenProgram: TOKEN_PROGRAM_ID,
};
// Call revoke_freeze_authority instruction
const tx = await program.methods
.revokeFreezeAuthority(metadataParams.name, metadataParams.symbol)
.accounts(context)
.signers([deployerAccount])
.rpc();
console.log("Revoke freeze authority transaction signature:", tx);
// Verify freeze authority is revoked
const mintInfo = await provider.connection.getParsedAccountInfo(mintAccount);
console.log("Mint account after revoking freeze authority:", mintInfo);
// Attempt to freeze token account should now fail
try {
const tokenAccount = await getAssociatedTokenAddress(mintAccount, user1Account.publicKey, false, TOKEN_PROGRAM_ID);
const context = {
mint: mintAccount,
destination: tokenAccount,
user: user1Account.publicKey,
tokenProgram: TOKEN_PROGRAM_ID,
};
const freezeTx = await program.methods
.freezeTokenAccount(metadataParams.name, metadataParams.symbol)
.accounts(context)
.signers([user1Account])
.rpc();
console.log("Freeze token account unexpectedly succeeded");
} catch (error) {
console.log("Freeze token account failed as expected:", error);
}
})
执行后，查看mint账户，如果FREEZE AUTHORITY为空，说明已经完成丢弃freeze权限
