Extensions de métadonnées et pointeur de métadonnées

import { getCreateAccountInstruction } from "@solana-program/system";
import {
  extension,
  getInitializeAccountInstruction,
  getInitializeMintInstruction,
  getInitializeMetadataPointerInstruction,
  getMintSize,
  getTokenSize,
  TOKEN_2022_PROGRAM_ADDRESS,
  getInitializeTokenMetadataInstruction
} from "@solana-program/token-2022";
import {
  airdropFactory,
  appendTransactionMessageInstructions,
  createSolanaRpc,
  createSolanaRpcSubscriptions,
  createTransactionMessage,
  generateKeyPairSigner,
  getSignatureFromTransaction,
  lamports,
  pipe,
  sendAndConfirmTransactionFactory,
  setTransactionMessageFeePayerSigner,
  setTransactionMessageLifetimeUsingBlockhash,
  signTransactionMessageWithSigners,
  some
} from "@solana/kit";

// Create Connection, local validator in this example
const rpc = createSolanaRpc("http://localhost:8899");
const rpcSubscriptions = createSolanaRpcSubscriptions("ws://localhost:8900");

// Generate the authority for the mint (also acts as fee payer)
const authority = await generateKeyPairSigner();

// Fund authority/fee payer
await airdropFactory({ rpc, rpcSubscriptions })({
  recipientAddress: authority.address,
  lamports: lamports(5_000_000_000n), // 5 SOL
  commitment: "confirmed"
});

// Generate keypair to use as address of mint
const mint = await generateKeyPairSigner();

// Enable Metadata and Metadata Pointer extensions
const metadataExtension = extension("TokenMetadata", {
  updateAuthority: some(authority.address),
  mint: mint.address,
  name: "OPOS",
  symbol: "OPS",
  uri: "https://raw.githubusercontent.com/solana-developers/opos-asset/main/assets/DeveloperPortal/metadata.json",
  additionalMetadata: new Map().set("description", "Only possible on Solana")
});

const metadataPointerExtension = extension("MetadataPointer", {
  authority: authority.address,
  metadataAddress: mint.address // can also point to another account if desired
});

// Get mint account size with the metadata pointer extension alone
const spaceWithoutTokenMetadataExtension = BigInt(
  getMintSize([metadataPointerExtension])
);

// Get mint account size with all extensions(metadata && metadataPointer)
const spaceWithTokenMetadataExtension = BigInt(
  getMintSize([metadataPointerExtension, metadataExtension])
);

// Get minimum balance for rent exemption
const rent = await rpc
  .getMinimumBalanceForRentExemption(spaceWithTokenMetadataExtension)
  .send();

// Get latest blockhash to include in transaction
const { value: latestBlockhash } = await rpc.getLatestBlockhash().send();

// Instruction to create new account for mint
const createMintAccountInstruction = getCreateAccountInstruction({
  payer: authority,
  newAccount: mint,
  lamports: rent,
  space: spaceWithoutTokenMetadataExtension,
  programAddress: TOKEN_2022_PROGRAM_ADDRESS
});

// Initialize metadata extension
const initializeMetadataInstruction = getInitializeTokenMetadataInstruction({
  metadata: mint.address, // Account address that holds the metadata
  updateAuthority: authority.address, // Authority that can update the metadata
  mint: mint.address, // Mint Account address
  mintAuthority: authority, // Designated Mint Authority
  name: "OPOS",
  symbol: "OPS",
  uri: "https://raw.githubusercontent.com/solana-developers/opos-asset/main/assets/DeveloperPortal/metadata.json"
});

// Initialize metadata pointer extension
const initializeMetadataPointerInstruction =
  getInitializeMetadataPointerInstruction({
    mint: mint.address,
    authority: authority.address,
    metadataAddress: mint.address
  });

// Initialize mint account data
const initializeMintInstruction = getInitializeMintInstruction({
  mint: mint.address,
  decimals: 9,
  mintAuthority: authority.address,
  freezeAuthority: authority.address
});

// Generate keypair to use as address of token account
const tokenAccount = await generateKeyPairSigner();

// Get token account size (basic)
const tokenAccountLen = BigInt(getTokenSize([]));

// Get minimum balance for rent exemption
const tokenAccountRent = await rpc
  .getMinimumBalanceForRentExemption(tokenAccountLen)
  .send();

// Instruction to create new token account
const createTokenAccountInstruction = getCreateAccountInstruction({
  payer: authority,
  newAccount: tokenAccount,
  lamports: tokenAccountRent,
  space: tokenAccountLen,
  programAddress: TOKEN_2022_PROGRAM_ADDRESS
});

// Instruction to initialize the created token account
const initializeTokenAccountInstruction = getInitializeAccountInstruction({
  account: tokenAccount.address,
  mint: mint.address,
  owner: authority.address
});

// Build the instruction list
const instructions = [
  createMintAccountInstruction,
  initializeMetadataPointerInstruction,
  initializeMintInstruction,
  initializeMetadataInstruction,
  createTokenAccountInstruction,
  initializeTokenAccountInstruction
];

// Create transaction message
const transactionMessage = pipe(
  createTransactionMessage({ version: 0 }),
  (tx) => setTransactionMessageFeePayerSigner(authority, tx),
  (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx),
  (tx) => appendTransactionMessageInstructions(instructions, tx)
);

// Sign transaction message with all required signers
const signedTransaction =
  await signTransactionMessageWithSigners(transactionMessage);

// Send and confirm transaction
await sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(
  signedTransaction,
  { commitment: "confirmed", skipPreflight: true }
);

// Get transaction signature
const transactionSignature = getSignatureFromTransaction(signedTransaction);

console.log("Mint Address:", mint.address.toString());
console.log(
  "Token account with Metadata + Metadata Pointer:",
  tokenAccount.address.toString()
);
console.log("Transaction Signature:", transactionSignature);

use anyhow::Result;
use solana_client::nonblocking::rpc_client::RpcClient;
use solana_sdk::{
  commitment_config::CommitmentConfig,
  signature::{Keypair, Signer},
  system_instruction::create_account,
  transaction::Transaction,
};
use spl_token_2022::{
  ID as TOKEN_2022_PROGRAM_ID,
  extension::{
    ExtensionType, metadata_pointer::instruction::initialize as initialize_metadata_pointer,
  },
  instruction::initialize_mint,
  state::Mint,
};
use spl_token_metadata_interface::{
  instruction::initialize as initialize_token_metadata, state::TokenMetadata,
}; //  < 0.7.0

#[tokio::main]
async fn main() -> Result<()> {
  // Create connection to local validator
  let client = RpcClient::new_with_commitment(
    String::from("http://localhost:8899"),
    CommitmentConfig::confirmed(),
  );
  let latest_blockhash = client.get_latest_blockhash().await?;

  // Generate a new keypair for the fee payer
  let fee_payer = Keypair::new();

  // Airdrop 5 SOL to fee payer
  let airdrop_signature = client
    .request_airdrop(&fee_payer.pubkey(), 5_000_000_000)
    .await?;
  client.confirm_transaction(&airdrop_signature).await?;

  loop {
    let confirmed = client.confirm_transaction(&airdrop_signature).await?;
    if confirmed {
      break;
    }
  }

  // Generate keypair for the mint
  let mint = Keypair::new();

  // Token metadata
  let token_metadata  = TokenMetadata {
    update_authority: Some(fee_payer.pubkey()).try_into().unwrap(),
    mint: mint.pubkey(),
    name: "OPOS".to_string(),
    symbol : "OPS".to_string(),
    uri : "https://raw.githubusercontent.com/solana-developers/opos-asset/main/assets/DeveloperPortal/metadata.json".to_string(),
    additional_metadata: vec![("description".to_string(),"only possible on Solana".to_string())]
  };

  // Calculate space for mint with metadata pointer and token metadata extensions
  let mint_space =
    ExtensionType::try_calculate_account_len::<Mint>(&[ExtensionType::MetadataPointer])?;

  let metadata_len = token_metadata.tlv_size_of()?;

  let mint_rent = client
    .get_minimum_balance_for_rent_exemption(mint_space + metadata_len)
    .await?;

  // Instruction to create new account for mint (token22)
  let create_mint_account_instruction = create_account(
    &fee_payer.pubkey(),    // payer
    &mint.pubkey(),         // new account (mint)
    mint_rent,              // lamports
    mint_space as u64,      // space
    &TOKEN_2022_PROGRAM_ID, // program id
  );

  // Instruction to initialize metadata pointer (pointing to itself for self-managed metadata)
  let initialize_metadata_pointer_instruction = initialize_metadata_pointer(
    &TOKEN_2022_PROGRAM_ID,
    &mint.pubkey(),
    Some(fee_payer.pubkey()), // authority
    Some(mint.pubkey()),      // metadata address (pointing to self)
  )?;

  // Instruction to initialize mint account data
  let initialize_mint_instruction = initialize_mint(
    &TOKEN_2022_PROGRAM_ID,    // program id
    &mint.pubkey(),            // mint
    &fee_payer.pubkey(),       // mint authority
    Some(&fee_payer.pubkey()), // freeze authority
    9,                         // decimals
  )?;

  // Instruction to initialize token metadata
  let initialize_metadata_instruction = initialize_token_metadata(
    &TOKEN_2022_PROGRAM_ID,            // program id
    &mint.pubkey(),                    //metadata
    &fee_payer.pubkey(),               // update authority
    &mint.pubkey(),                    // mint
    &fee_payer.pubkey(),               // mint authority
    token_metadata.name.to_string(),   // name
    token_metadata.symbol.to_string(), // symbol
    token_metadata.uri.to_string(),    // uri
  );

  // Construct transaction with all instructions
  let transaction = Transaction::new_signed_with_payer(
    &[
      create_mint_account_instruction,
      initialize_metadata_pointer_instruction,
      initialize_mint_instruction,
      initialize_metadata_instruction,
    ],
    Some(&fee_payer.pubkey()),
    &[&fee_payer, &mint],
    latest_blockhash,
  );

  // Send and confirm transaction
  let transaction_signature = client.send_and_confirm_transaction(&transaction).await?;

  println!("Mint Address: {}", mint.pubkey());
  println!("\nSuccessfully created mint with metadata pointer and token metadata extensions");
  println!("Transaction Signature: {}", transaction_signature);

  Ok(())
}