Cosa Fa la Revoca di un Delegato?
Revocare un delegato cancella il delegato corrente del token account e reimposta a zero l'importo delegato.
Dopo la revoca, il delegato precedente non ha più l'autorità di trasferire o bruciare token per conto del token account.
Come Revocare un Delegato
La revoca di un delegato utilizza l'istruzione Revoke del Token Program.
L'istruzione Revoke cancella i campi del delegato sul token account
sorgente. Nel Token Program, il proprietario del token account firma la revoca.
Nel Token Extensions Program, anche il delegato corrente può revocare la delega.
Riferimento al Codice Sorgente
| Elemento | Descrizione | Token Program | Token Extensions Program |
|---|---|---|---|
Account | Lo stato del token account memorizza il delegato e l'importo delegato. | Sorgente | Sorgente |
Revoke | Un'istruzione che rimuove il delegato corrente da un token account. | Sorgente | Sorgente |
process_revoke | Logica condivisa del processore per la revoca del delegato. | Sorgente | Sorgente |
Typescript
Gli esempi Kit qui sotto mostrano l'approccio consigliato utilizzando
@solana/kit. Esempi legacy che utilizzano @solana/web3.js sono inclusi come
riferimento.
Kit
import { generateKeyPairSigner } from "@solana/kit";import { createLocalClient } from "@solana/kit-client-rpc";import {findAssociatedTokenPda,tokenProgram,TOKEN_PROGRAM_ADDRESS} from "@solana-program/token";const client = await createLocalClient().use(tokenProgram());const mint = await generateKeyPairSigner();const delegate = await generateKeyPairSigner();const [tokenAccount] = await findAssociatedTokenPda({mint: mint.address,owner: client.payer.address,tokenProgram: TOKEN_PROGRAM_ADDRESS});const result = await client.token.instructions.revoke({source: tokenAccount, // Token account whose delegate approval changes.owner: client.payer // Owner approving this delegate change.}).sendTransaction();const tokenAccountData = await client.token.accounts.token.fetch(tokenAccount);console.log("Mint Address:", mint.address);console.log("\nToken Account Address:", tokenAccount);console.log("Token Account:", tokenAccountData.data);console.log("\nDelegate Address:", delegate.address);console.log("\nTransaction Signature:", result.context.signature);
Console
Click to execute the code.
Web3.js
import { Connection, Keypair, LAMPORTS_PER_SOL } from "@solana/web3.js";import {createAssociatedTokenAccount,approveChecked,createMint,getAccount,mintToChecked,revoke,TOKEN_PROGRAM_ID} from "@solana/spl-token";const result = await revoke(connection, // Connection to the local validator.feePayer, // Account paying transaction fees.associatedTokenAccount, // Token account whose delegate approval changes.feePayer, // Owner approving this delegate change.[], // Additional multisig signers.{commitment: "confirmed" // Confirmation options for the transaction.},TOKEN_PROGRAM_ID // Token program to invoke.);const tokenAccountData = await getAccount(connection,associatedTokenAccount,"confirmed",TOKEN_PROGRAM_ID);console.log("Mint Address:", mintPubkey.toBase58());console.log("\nAssociated Token Account Address:",associatedTokenAccount.toBase58());console.log("Associated Token Account:", tokenAccountData);console.log("\nDelegate Address:", delegate.publicKey.toBase58());console.log("\nTransaction Signature:", result);
Console
Click to execute the code.
Rust
Rust
use anyhow::Result;use solana_client::nonblocking::rpc_client::RpcClient;use solana_commitment_config::CommitmentConfig;use solana_sdk::{program_pack::Pack,signature::{Keypair, Signer},transaction::Transaction,};use solana_system_interface::instruction::create_account;use spl_associated_token_account_interface::{address::get_associated_token_address, instruction::create_associated_token_account,};use spl_token_interface::{id as token_program_id,instruction::{approve_checked, initialize_mint, mint_to_checked, revoke},state::{Account, Mint},};#[tokio::main]async fn main() -> Result<()> {let client = RpcClient::new_with_commitment(String::from("http://localhost:8899"),CommitmentConfig::confirmed(),);let delegate = Keypair::new();let transaction = Transaction::new_signed_with_payer(&[revoke(&token_program_id(), // Token program to invoke.&associated_token_address, // Token account whose delegate approval changes.&fee_payer.pubkey(), // Owner approving this delegate change.&[], // Additional multisig signers.)?,],Some(&fee_payer.pubkey()),&[&fee_payer],latest_blockhash,);let transaction_signature = client.send_and_confirm_transaction(&transaction).await?;let token_account = client.get_account(&associated_token_address).await?;let token_data = Account::unpack(&token_account.data)?;println!("Mint Address: {}", mint.pubkey());println!("\nAssociated Token Account Address: {}",associated_token_address);println!("Associated Token Account: {:#?}", token_data);println!("\nDelegate Address: {}", delegate.pubkey());println!("\nTransaction Signature: {}", transaction_signature);Ok(())}
Console
Click to execute the code.
Python
Python
#!/usr/bin/env python3import asyncioimport jsonfrom solana.rpc.async_api import AsyncClientfrom solders.keypair import Keypairfrom solders.message import Messagefrom solders.pubkey import Pubkeyfrom solders.system_program import create_account, CreateAccountParamsfrom solders.transaction import Transactionfrom spl.token.async_client import AsyncTokenfrom spl.token.instructions import (approve_checked,ApproveCheckedParams,create_associated_token_account,get_associated_token_address,initialize_mint,InitializeMintParams,mint_to_checked,MintToCheckedParams,revoke,RevokeParams,)from spl.token.constants import MINT_LEN, TOKEN_PROGRAM_IDDECIMALS = 2AMOUNT_TO_MINT = 100AMOUNT_TO_APPROVE = 25async def main():rpc = AsyncClient("http://localhost:8899")delegate = Keypair()async with rpc:revoke_delegate_instruction = revoke(RevokeParams(program_id=TOKEN_PROGRAM_ID, # Token program to invoke.account=token_account_address, # Token account whose delegate approval changes.owner=fee_payer.pubkey(), # Account that owns the token account.))latest_blockhash = await rpc.get_latest_blockhash()transaction = Transaction([fee_payer],Message([revoke_delegate_instruction], fee_payer.pubkey()),latest_blockhash.value.blockhash,)result = await rpc.send_transaction(transaction)token_account_info = await token.get_account_info(token_account_address)token_account = {key: str(value) if isinstance(value, Pubkey) else valuefor key, value in token_account_info._asdict().items()}print("Mint Address:", mint.pubkey())print("\nToken Account Address:", token_account_address)print("Token Account:")print(json.dumps(token_account, indent=2))print("\nDelegate Address:", delegate.pubkey())print("\nTransaction Signature:", result.value)if __name__ == "__main__":asyncio.run(main())
Console
Click to execute the code.
Is this page helpful?