Token Non Trasferibili

Cosa Sono i Token Non Trasferibili?

L'estensione del mint NonTransferable del Token Extensions Program rende ogni token account per quel mint non trasferibile. Dopo che i token sono stati coniati, i possessori di token non possono spostarli in un altro token account con Transfer o TransferChecked.

Questo modello è utile per asset che devono rimanere associati a un singolo portafoglio.

I token non trasferibili possono comunque essere:

  • Coniati dall'autorità del mint
  • Bruciati dal proprietario del token account o da un delegato autorizzato
  • I token account possono essere chiusi dopo che il saldo raggiunge zero

Estensioni del Token Account

Quando un token account viene inizializzato per un mint con NonTransferable, il token account viene inizializzato con NonTransferableAccount e ImmutableOwner. Quando il token account viene creato tramite l'Associated Token Program, la dimensione dell'account richiesta viene calcolata e il token account viene creato con la dimensione necessaria e i lamport esenti da rent.

Come Creare un Mint Non Trasferibile

Per creare un mint non trasferibile:

  1. Calcola la dimensione del mint account e il rent necessario per il mint e l'estensione NonTransferable.
  2. Crea il mint account con CreateAccount, inizializza NonTransferable e inizializza il mint con InitializeMint.
  3. Crea i token account per il mint. NonTransferableAccount e ImmutableOwner vengono automaticamente abilitati per i token account.
  4. Transfer e TransferChecked falliscono con TokenError::NonTransferable.

Calcola la dimensione dell'account

Calcola la dimensione del mint account per il mint di base più l'estensione NonTransferable. Questa è la dimensione utilizzata in CreateAccount.

Example
const client = await createClient()
.use(generatedPayer())
.use(
solanaRpc({
rpcUrl: "http://localhost:8899",
rpcSubscriptionsUrl: "ws://localhost:8900"
})
)
.use(rpcAirdrop())
.use(airdropPayer(lamports(1_000_000_000n)));
const mint = await generateKeyPairSigner();
const recipient = await generateKeyPairSigner();
const nonTransferableExtension = extension("NonTransferable", {});
const mintSpace = BigInt(getMintSize([nonTransferableExtension]));

Calcola il rent

Calcola il rent utilizzando lo spazio necessario per il mint più l'estensione NonTransferable.

Example
const client = await createClient()
.use(generatedPayer())
.use(
solanaRpc({
rpcUrl: "http://localhost:8899",
rpcSubscriptionsUrl: "ws://localhost:8900"
})
)
.use(rpcAirdrop())
.use(airdropPayer(lamports(1_000_000_000n)));
const mint = await generateKeyPairSigner();
const recipient = await generateKeyPairSigner();
const nonTransferableExtension = extension("NonTransferable", {});
const mintSpace = BigInt(getMintSize([nonTransferableExtension]));
const mintRent = await client.rpc
.getMinimumBalanceForRentExemption(mintSpace)
.send();

Crea il mint account

Crea il mint account con lo spazio e i lamport calcolati.

Example
const client = await createClient()
.use(generatedPayer())
.use(
solanaRpc({
rpcUrl: "http://localhost:8899",
rpcSubscriptionsUrl: "ws://localhost:8900"
})
)
.use(rpcAirdrop())
.use(airdropPayer(lamports(1_000_000_000n)));
const mint = await generateKeyPairSigner();
const recipient = await generateKeyPairSigner();
const nonTransferableExtension = extension("NonTransferable", {});
const mintSpace = BigInt(getMintSize([nonTransferableExtension]));
const mintRent = await client.rpc
.getMinimumBalanceForRentExemption(mintSpace)
.send();
await client.sendTransaction([
getCreateAccountInstruction({
payer: client.payer,
newAccount: mint,
lamports: mintRent,
space: mintSpace,
programAddress: TOKEN_2022_PROGRAM_ADDRESS
})
]);

Inizializza NonTransferable

Inizializza l'estensione NonTransferable sul mint.

Example
const client = await createClient()
.use(generatedPayer())
.use(
solanaRpc({
rpcUrl: "http://localhost:8899",
rpcSubscriptionsUrl: "ws://localhost:8900"
})
)
.use(rpcAirdrop())
.use(airdropPayer(lamports(1_000_000_000n)));
const mint = await generateKeyPairSigner();
const recipient = await generateKeyPairSigner();
const nonTransferableExtension = extension("NonTransferable", {});
const mintSpace = BigInt(getMintSize([nonTransferableExtension]));
const mintRent = await client.rpc
.getMinimumBalanceForRentExemption(mintSpace)
.send();
await client.sendTransaction([
getCreateAccountInstruction({
payer: client.payer,
newAccount: mint,
lamports: mintRent,
space: mintSpace,
programAddress: TOKEN_2022_PROGRAM_ADDRESS
}),
getInitializeNonTransferableMintInstruction({
mint: mint.address
})
]);

Inizializza il mint

Inizializza il mint con InitializeMint nella stessa transazione.

Example
const client = await createClient()
.use(generatedPayer())
.use(
solanaRpc({
rpcUrl: "http://localhost:8899",
rpcSubscriptionsUrl: "ws://localhost:8900"
})
)
.use(rpcAirdrop())
.use(airdropPayer(lamports(1_000_000_000n)));
const mint = await generateKeyPairSigner();
const recipient = await generateKeyPairSigner();
const nonTransferableExtension = extension("NonTransferable", {});
const mintSpace = BigInt(getMintSize([nonTransferableExtension]));
const mintRent = await client.rpc
.getMinimumBalanceForRentExemption(mintSpace)
.send();
await client.sendTransaction([
getCreateAccountInstruction({
payer: client.payer,
newAccount: mint,
lamports: mintRent,
space: mintSpace,
programAddress: TOKEN_2022_PROGRAM_ADDRESS
}),
getInitializeNonTransferableMintInstruction({
mint: mint.address
}),
getInitializeMintInstruction({
mint: mint.address,
decimals: 0,
mintAuthority: client.payer.address,
freezeAuthority: client.payer.address
})
]);

Calcola la dimensione dell'account

Calcola la dimensione del mint account per il mint di base più l'estensione NonTransferable. Questa è la dimensione utilizzata in CreateAccount.

Calcola il rent

Calcola il rent utilizzando lo spazio necessario per il mint più l'estensione NonTransferable.

Crea il mint account

Crea il mint account con lo spazio e i lamport calcolati.

Inizializza NonTransferable

Inizializza l'estensione NonTransferable sul mint.

Inizializza il mint

Inizializza il mint con InitializeMint nella stessa transazione.

Example
const client = await createClient()
.use(generatedPayer())
.use(
solanaRpc({
rpcUrl: "http://localhost:8899",
rpcSubscriptionsUrl: "ws://localhost:8900"
})
)
.use(rpcAirdrop())
.use(airdropPayer(lamports(1_000_000_000n)));
const mint = await generateKeyPairSigner();
const recipient = await generateKeyPairSigner();
const nonTransferableExtension = extension("NonTransferable", {});
const mintSpace = BigInt(getMintSize([nonTransferableExtension]));

Ordine delle istruzioni

InitializeNonTransferableMint deve venire prima di InitializeMint. CreateAccount, InitializeNonTransferableMint e InitializeMint devono essere inclusi nella stessa transazione.

Riferimento alla fonte

ElementoDescrizioneFonte
NonTransferableEstensione del mint che contrassegna i token del mint come non trasferibili.Fonte
NonTransferableAccountEstensione del token account aggiunta ai token account per mint non trasferibili.Fonte
ImmutableOwnerEstensione del token account che impedisce modifiche alla proprietà ed è richiesta per i token account non trasferibili.Fonte
InitializeNonTransferableMintIstruzione che inizializza l'estensione non trasferibile a livello di mint prima di InitializeMint.Fonte
process_initialize_non_transferable_mintLogica del processore che inizializza l'estensione del mint NonTransferable su un mint non inizializzato.Fonte
get_required_init_account_extensionsUtilizzato per aggiungere automaticamente estensioni del token account quando i token account vengono inizializzati in base alle estensioni abilitate sul mint. Per i mint NonTransferable, aggiunge NonTransferableAccount e ImmutableOwner.Fonte

Typescript

L'esempio Kit seguente utilizza le istruzioni generate direttamente. Sono inclusi esempi legacy che utilizzano @solana/web3.js come riferimento.

Kit

Instructions
import { lamports, createClient, generateKeyPairSigner } from "@solana/kit";
import { solanaRpc, rpcAirdrop } from "@solana/kit-plugin-rpc";
import { generatedPayer, airdropPayer } from "@solana/kit-plugin-signer";
import { getCreateAccountInstruction } from "@solana-program/system";
import {
extension,
fetchMint,
fetchToken,
findAssociatedTokenPda,
getCreateAssociatedTokenInstructionAsync,
getInitializeMintInstruction,
getInitializeNonTransferableMintInstruction,
getMintSize,
getMintToCheckedInstruction,
getTransferCheckedInstruction,
TOKEN_2022_PROGRAM_ADDRESS
} from "@solana-program/token-2022";
const client = await createClient()
.use(generatedPayer())
.use(
solanaRpc({
rpcUrl: "http://localhost:8899",
rpcSubscriptionsUrl: "ws://localhost:8900"
})
)
.use(rpcAirdrop())
.use(airdropPayer(lamports(1_000_000_000n)));
const mint = await generateKeyPairSigner();
const recipient = await generateKeyPairSigner();
const nonTransferableExtension = extension("NonTransferable", {});
const mintSpace = BigInt(getMintSize([nonTransferableExtension]));
const mintRent = await client.rpc
.getMinimumBalanceForRentExemption(mintSpace)
.send();
await client.sendTransaction([
getCreateAccountInstruction({
payer: client.payer,
newAccount: mint,
lamports: mintRent,
space: mintSpace,
programAddress: TOKEN_2022_PROGRAM_ADDRESS
}),
getInitializeNonTransferableMintInstruction({
mint: mint.address // Mint account that stores the NonTransferable extension.
}),
getInitializeMintInstruction({
mint: mint.address,
decimals: 0,
mintAuthority: client.payer.address,
freezeAuthority: client.payer.address
})
]);
const [sourceToken] = await findAssociatedTokenPda({
mint: mint.address,
owner: client.payer.address,
tokenProgram: TOKEN_2022_PROGRAM_ADDRESS
});
const [destinationToken] = await findAssociatedTokenPda({
mint: mint.address,
owner: recipient.address,
tokenProgram: TOKEN_2022_PROGRAM_ADDRESS
});
await client.sendTransaction([
await getCreateAssociatedTokenInstructionAsync({
payer: client.payer,
mint: mint.address,
owner: client.payer.address
}),
await getCreateAssociatedTokenInstructionAsync({
payer: client.payer,
mint: mint.address,
owner: recipient.address
}),
getMintToCheckedInstruction({
mint: mint.address,
token: sourceToken,
mintAuthority: client.payer,
amount: 1n,
decimals: 0
})
]);
try {
await client.sendTransaction([
getTransferCheckedInstruction({
source: sourceToken, // Token account sending the transfer.
mint: mint.address, // Mint with the non-transferable configuration.
destination: destinationToken, // Token account receiving the transfer.
authority: client.payer, // Signer approving the transfer.
amount: 1n, // Token amount in base units.
decimals: 0 // Decimals defined on the mint.
})
]);
} catch (error) {
console.error("Transfer failed as expected:", error);
}
const mintAccount = await fetchMint(client.rpc, mint.address);
const sourceTokenAccount = await fetchToken(client.rpc, sourceToken);
console.log("Mint Address:", mint.address);
console.log("Mint Extensions:", mintAccount.data.extensions);
console.log("\nSource ATA:", sourceToken);
console.log("Source Token Extensions:", sourceTokenAccount.data.extensions);
console.log("Destination ATA:", destinationToken);
Console
Click to execute the code.

Web3.js

Instructions
import {
Connection,
Keypair,
LAMPORTS_PER_SOL,
sendAndConfirmTransaction,
SystemProgram,
Transaction
} from "@solana/web3.js";
import {
ASSOCIATED_TOKEN_PROGRAM_ID,
createAssociatedTokenAccountInstruction,
createInitializeMintInstruction,
createInitializeNonTransferableMintInstruction,
createMintToCheckedInstruction,
createTransferCheckedInstruction,
ExtensionType,
getAccount,
getAssociatedTokenAddressSync,
getMint,
getMintLen,
getNonTransferable,
TOKEN_2022_PROGRAM_ID
} from "@solana/spl-token";
const connection = new Connection("http://localhost:8899", "confirmed");
const latestBlockhash = await connection.getLatestBlockhash();
const feePayer = Keypair.generate();
const recipient = Keypair.generate();
const airdropSignature = await connection.requestAirdrop(
feePayer.publicKey,
LAMPORTS_PER_SOL
);
await connection.confirmTransaction({
blockhash: latestBlockhash.blockhash,
lastValidBlockHeight: latestBlockhash.lastValidBlockHeight,
signature: airdropSignature
});
const mint = Keypair.generate();
const mintSpace = getMintLen([ExtensionType.NonTransferable]);
const mintRent = await connection.getMinimumBalanceForRentExemption(mintSpace);
const sourceToken = getAssociatedTokenAddressSync(
mint.publicKey,
feePayer.publicKey,
false,
TOKEN_2022_PROGRAM_ID,
ASSOCIATED_TOKEN_PROGRAM_ID
);
const destinationToken = getAssociatedTokenAddressSync(
mint.publicKey,
recipient.publicKey,
false,
TOKEN_2022_PROGRAM_ID,
ASSOCIATED_TOKEN_PROGRAM_ID
);
await sendAndConfirmTransaction(
connection,
new Transaction({
feePayer: feePayer.publicKey,
blockhash: latestBlockhash.blockhash,
lastValidBlockHeight: latestBlockhash.lastValidBlockHeight
}).add(
SystemProgram.createAccount({
fromPubkey: feePayer.publicKey,
newAccountPubkey: mint.publicKey,
lamports: mintRent,
space: mintSpace,
programId: TOKEN_2022_PROGRAM_ID
}),
createInitializeNonTransferableMintInstruction(
mint.publicKey, // Mint account that stores the NonTransferable extension.
TOKEN_2022_PROGRAM_ID // Token program that owns the mint.
),
createInitializeMintInstruction(
mint.publicKey,
0,
feePayer.publicKey,
feePayer.publicKey,
TOKEN_2022_PROGRAM_ID
)
),
[feePayer, mint],
{ commitment: "confirmed" }
);
await sendAndConfirmTransaction(
connection,
new Transaction().add(
createAssociatedTokenAccountInstruction(
feePayer.publicKey,
sourceToken,
feePayer.publicKey,
mint.publicKey,
TOKEN_2022_PROGRAM_ID,
ASSOCIATED_TOKEN_PROGRAM_ID
),
createAssociatedTokenAccountInstruction(
feePayer.publicKey,
destinationToken,
recipient.publicKey,
mint.publicKey,
TOKEN_2022_PROGRAM_ID,
ASSOCIATED_TOKEN_PROGRAM_ID
),
createMintToCheckedInstruction(
mint.publicKey,
sourceToken,
feePayer.publicKey,
1,
0,
[],
TOKEN_2022_PROGRAM_ID
)
),
[feePayer],
{ commitment: "confirmed" }
);
try {
await sendAndConfirmTransaction(
connection,
new Transaction().add(
createTransferCheckedInstruction(
sourceToken, // Token account sending the transfer.
mint.publicKey, // Mint with the non-transferable configuration.
destinationToken, // Token account receiving the transfer.
feePayer.publicKey, // Signer approving the transfer.
1, // Token amount in base units.
0, // Decimals defined on the mint.
[], // Additional multisig signers.
TOKEN_2022_PROGRAM_ID // Token program that processes the transfer.
)
),
[feePayer],
{ commitment: "confirmed" }
);
} catch (error) {
console.error("Transfer failed as expected:", error);
}
const mintAccount = await getMint(
connection,
mint.publicKey,
"confirmed",
TOKEN_2022_PROGRAM_ID
);
const sourceTokenAccount = await getAccount(
connection,
sourceToken,
"confirmed",
TOKEN_2022_PROGRAM_ID
);
console.log("Mint Address:", mint.publicKey.toBase58());
console.log("Has NonTransferable:", getNonTransferable(mintAccount) !== null);
console.log("\nSource ATA:", sourceToken.toBase58());
console.log("Source Token Account:", sourceTokenAccount);
console.log("Destination ATA:", destinationToken.toBase58());
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::{
signature::{Keypair, Signer},
transaction::Transaction,
};
use solana_system_interface::instruction::create_account;
use spl_associated_token_account_interface::{
address::get_associated_token_address_with_program_id,
instruction::create_associated_token_account,
};
use spl_token_2022_interface::{
extension::{
non_transferable::{NonTransferable, NonTransferableAccount},
BaseStateWithExtensions, ExtensionType, StateWithExtensions,
},
instruction::{
initialize_mint, initialize_non_transferable_mint, mint_to_checked, transfer_checked,
},
state::{Account, Mint},
ID as TOKEN_2022_PROGRAM_ID,
};
#[tokio::main]
async fn main() -> Result<()> {
let client = RpcClient::new_with_commitment(
String::from("http://localhost:8899"),
CommitmentConfig::confirmed(),
);
let recipient = Keypair::new();
let fee_payer = Keypair::new();
let decimals = 0;
let airdrop_signature = client
.request_airdrop(&fee_payer.pubkey(), 1_000_000_000)
.await?;
loop {
let confirmed = client.confirm_transaction(&airdrop_signature).await?;
if confirmed {
break;
}
}
let mint = Keypair::new();
let mint_space =
ExtensionType::try_calculate_account_len::<Mint>(&[ExtensionType::NonTransferable])?;
let mint_rent = client
.get_minimum_balance_for_rent_exemption(mint_space)
.await?;
let mint_blockhash = client.get_latest_blockhash().await?;
let mint_transaction = Transaction::new_signed_with_payer(
&[
create_account(
&fee_payer.pubkey(),
&mint.pubkey(),
mint_rent,
mint_space as u64,
&TOKEN_2022_PROGRAM_ID,
),
initialize_non_transferable_mint(&TOKEN_2022_PROGRAM_ID, &mint.pubkey())?,
initialize_mint(
&TOKEN_2022_PROGRAM_ID,
&mint.pubkey(),
&fee_payer.pubkey(),
Some(&fee_payer.pubkey()),
decimals,
)?,
],
Some(&fee_payer.pubkey()),
&[&fee_payer, &mint],
mint_blockhash,
);
client.send_and_confirm_transaction(&mint_transaction).await?;
let source_token_address = get_associated_token_address_with_program_id(
&fee_payer.pubkey(),
&mint.pubkey(),
&TOKEN_2022_PROGRAM_ID,
);
let destination_token_address = get_associated_token_address_with_program_id(
&recipient.pubkey(),
&mint.pubkey(),
&TOKEN_2022_PROGRAM_ID,
);
let setup_blockhash = client.get_latest_blockhash().await?;
let setup_transaction = Transaction::new_signed_with_payer(
&[
create_associated_token_account(
&fee_payer.pubkey(),
&fee_payer.pubkey(),
&mint.pubkey(),
&TOKEN_2022_PROGRAM_ID,
),
create_associated_token_account(
&fee_payer.pubkey(),
&recipient.pubkey(),
&mint.pubkey(),
&TOKEN_2022_PROGRAM_ID,
),
mint_to_checked(
&TOKEN_2022_PROGRAM_ID,
&mint.pubkey(),
&source_token_address,
&fee_payer.pubkey(),
&[],
1,
decimals,
)?,
],
Some(&fee_payer.pubkey()),
&[&fee_payer],
setup_blockhash,
);
client.send_and_confirm_transaction(&setup_transaction).await?;
let transfer_blockhash = client.get_latest_blockhash().await?;
let transfer_transaction = Transaction::new_signed_with_payer(
&[
transfer_checked(
&TOKEN_2022_PROGRAM_ID, // Token program to invoke.
&source_token_address, // Token account sending the tokens.
&mint.pubkey(), // Mint for the token being transferred.
&destination_token_address, // Token account receiving the tokens.
&fee_payer.pubkey(), // Owner or delegate approving the transfer.
&[], // Additional multisig signers.
1, // Token amount in base units.
decimals, // Decimals defined on the mint account.
)?,
],
Some(&fee_payer.pubkey()),
&[&fee_payer],
transfer_blockhash,
);
match client.send_and_confirm_transaction(&transfer_transaction).await {
Ok(signature) => println!("Transfer unexpectedly succeeded: {}", signature),
Err(error) => println!("Transfer failed as expected: {error:#?}"),
}
let mint_account = client.get_account(&mint.pubkey()).await?;
let mint_state = StateWithExtensions::<Mint>::unpack(&mint_account.data)?;
let source_token_account = client.get_account(&source_token_address).await?;
let source_token_state = StateWithExtensions::<Account>::unpack(&source_token_account.data)?;
println!("Mint Address: {}", mint.pubkey());
println!("Mint Extensions: {:?}", mint_state.get_extension_types()?);
println!(
"Has NonTransferable: {}",
mint_state.get_extension::<NonTransferable>().is_ok()
);
println!("\nSource ATA: {}", source_token_address);
println!(
"Source Token Extensions: {:?}",
source_token_state.get_extension_types()?
);
println!(
"Has NonTransferableAccount: {}",
source_token_state
.get_extension::<NonTransferableAccount>()
.is_ok()
);
println!("Destination ATA: {}", destination_token_address);
Ok(())
}
Console
Click to execute the code.

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