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Token and Nfts - Updated token-program-advanced lesson #487

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Token and Nfts - Updated token-program-advanced lesson #487

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55 changes: 45 additions & 10 deletions content/courses/tokens-and-nfts/token-program-advanced.md
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Original file line number Diff line number Diff line change
Expand Up @@ -51,7 +51,7 @@ Under the hood, the `burn` function creates a transaction with instructions
obtained from the `createBurnInstruction` function:

```typescript
import { PublicKey, Transaction } from "@solana/web3";
import { PublicKey, Transaction } from "@solana/web3.js";
import { createBurnInstruction } from "@solana/spl-token";

async function buildBurnTransaction(
Expand Down Expand Up @@ -105,15 +105,15 @@ Under the hood, the `approve` function creates a transaction with instructions
obtained from the `createApproveInstruction` function:

```typescript
import { PublicKey, Transaction } from "@solana/web3";
import { PublicKey, Transaction } from "@solana/web3.js";
import { createApproveInstruction } from "@solana/spl-token";

async function buildApproveTransaction(
account: PublicKey,
delegate: PublicKey,
owner: PublicKey,
amount: number,
): Promise<web3.Transaction> {
): Promise<Transaction> {
const transaction = new Transaction().add(
createApproveInstruction(account, delegate, owner, amount),
);
Expand Down Expand Up @@ -150,13 +150,13 @@ Under the hood, the `revoke` function creates a transaction with instructions
obtained from the `createRevokeInstruction` function:

```typescript
import { PublicKey, Transaction } from "@solana/web3";
import { PublicKey, Transaction } from "@solana/web3.js";
import { revoke } from "@solana/spl-token";

async function buildRevokeTransaction(
account: PublicKey,
owner: PublicKey,
): Promise<web3.Transaction> {
): Promise<Transaction> {
const transaction = new Transaction().add(
createRevokeInstruction(account, owner),
);
Expand Down Expand Up @@ -231,7 +231,7 @@ const approveTransactionSignature = await approve(
);

console.log(
`Approve Delegate Transaction: ${getExplorerLink(
✅`Approve Delegate Transaction: ${getExplorerLink(
"transaction",
approveTransactionSignature,
"devnet",
Expand All @@ -243,12 +243,47 @@ console.log(

Lets revoke the `delegate` using the `spl-token` library's `revoke` function.

Revoke will set delegate for the token account to null and reset the delegated
Revoke will set delegate for the associated token account to null and reset the delegated
amount to 0.

All we will need for this function is the token account and user. After the
Create a new file `revoke-token.ts`


```typescript
import "dotenv/config";
import {
getExplorerLink,
getKeypairFromEnvironment,
} from "@solana-developers/helpers";
import { Connection, PublicKey, clusterApiUrl } from "@solana/web3.js";
import {
approve,
getOrCreateAssociatedTokenAccount,
revoke,
} from "@solana/spl-token";

const connection = new Connection(clusterApiUrl("devnet"));

const user = getKeypairFromEnvironment("SECRET_KEY");

console.log(
`🔑 Loaded our keypair securely, using an env file! Our public key is: ${user.publicKey.toBase58()}`,
);

// Add the delegate public key here.
const delegate = new PublicKey("YOUR_DELEGATE_HERE");

// Substitute in your token mint account
const tokenMintAccount = new PublicKey("YOUR_TOKEN_MINT_ADDRESS_HERE");

// Get or create the source and destination token accounts to store this token
const sourceTokenAccount = await getOrCreateAssociatedTokenAccount(
connection,
user,
tokenMintAccount,
user.publicKey,
);

const revokeTransactionSignature = await revoke(
connection,
user,
Expand All @@ -257,7 +292,7 @@ const revokeTransactionSignature = await revoke(
);

console.log(
`Revoke Delegate Transaction: ${getExplorerLink(
✅`Revoke Delegate Transaction: ${getExplorerLink(
"transaction",
revokeTransactionSignature,
"devnet",
Expand Down Expand Up @@ -315,7 +350,7 @@ const transactionSignature = await burn(
);

console.log(
`Burn Transaction: ${getExplorerLink(
✅`Burn Transaction: ${getExplorerLink(
"transaction",
transactionSignature,
"devnet",
Expand Down
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