Documentação SolanaTokens na SolanaFundamentos

Criar uma Token Account

O que é uma Token Account?

Uma token account é um tipo de conta nos Token Programs da Solana que armazena informações sobre a propriedade de um token específico (mint) por um indivíduo. Cada token account está associada a um único mint e rastreia detalhes como o saldo de tokens e o proprietário.

Token Account Type
/// Account data.

#[repr(C)]

#[derive(Clone, Copy, Debug, Default, PartialEq)]

pub struct Account {

    /// The mint associated with this account

    pub mint: Pubkey,

    /// The owner of this account.

    pub owner: Pubkey,

    /// The amount of tokens this account holds.

    pub amount: u64,

    /// If `delegate` is `Some` then `delegated_amount` represents

    /// the amount authorized by the delegate

    pub delegate: COption<Pubkey>,

    /// The account's state

    pub state: AccountState,

    /// If `is_native.is_some`, this is a native token, and the value logs the

    /// rent-exempt reserve. An Account is required to be rent-exempt, so

    /// the value is used by the Processor to ensure that wrapped SOL

    /// accounts do not drop below this threshold.

    pub is_native: COption<u64>,

    /// The amount delegated

    pub delegated_amount: u64,

    /// Optional authority to close the account.

    pub close_authority: COption<Pubkey>,

}

Observe que no código-fonte, os desenvolvedores chamam uma Token account de tipo Account. Tanto o Token Program quanto o Token Extension Program compartilham a mesma implementação base para a Token account.

Para manter tokens de um mint específico, os usuários devem primeiro criar uma token account. Cada token account mantém o controle de:

  1. Um mint específico (o tipo de token que a token account mantém unidades)
  2. Um proprietário (a autoridade que pode transferir tokens da conta)

Aqui está um exemplo usando USD Coin (USDC) na Solana:

  • O endereço do mint do USD Coin: EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v
  • A Circle (emissora do USD Coin) tem uma token account em 3emsAVdmGKERbHjmGfQ6oZ1e35dkf5iYcS6U4CPKFVaa
  • Esta token account mantém apenas unidades do token USD Coin (mint)
  • A Circle tem autoridade de proprietário em 7VHUFJHWu2CuExkJcJrzhQPJ2oygupTWkL2A2For4BmE e pode transferir esses tokens

Você pode ver os detalhes desta token account no Solana Explorer.

O termo "proprietário" é usado em dois contextos diferentes:

  1. O "proprietário" da token account - Este é um endereço armazenado nos dados da token account como o campo "owner" do tipo Account definido pelo Token Program. O proprietário pode transferir, queimar ou delegar tokens da conta. Este endereço às vezes é referido como a "autoridade" da token account para distingui-lo do proprietário do programa.

  2. O "owner" do programa - Isso se refere ao programa que possui os dados da conta na Solana. Para contas de token, isso é sempre o Token Program ou Token Extensions Program, conforme especificado no campo "owner" do tipo base Solana Account.

Quando trabalhamos com token accounts, "owner" geralmente se refere à autoridade que pode gastar os tokens, não ao programa que possui a conta.

O que é uma Associated Token Account?

Uma associated token account é uma token account com um endereço que é um Program Derived Address (PDA) criado pelo Associated Token Program. Você pode pensar em uma associated token account como a token account padrão para um usuário manter unidades de um token específico (mint).

O termo "associated token accounts" se aplica apenas às token accounts que o Associated Token Program cria.

As associated token accounts fornecem uma maneira determinística de encontrar a token account de um usuário para qualquer mint. Você pode inspecionar a implementação da derivação aqui.

Associated Token Account Address Derivation
pub fn get_associated_token_address_and_bump_seed_internal(

    wallet_address: &Pubkey,

    token_mint_address: &Pubkey,

    program_id: &Pubkey,

    token_program_id: &Pubkey,

) -> (Pubkey, u8) {

    Pubkey::find_program_address(

        &[

            &wallet_address.to_bytes(), // Owner's public key

            &token_program_id.to_bytes(), // Token Program or Token Extension Program

            &token_mint_address.to_bytes(), // Token mint address

        ],

        program_id, // Associated Token Program ID

    )

}

Essa derivação determinística garante que para qualquer combinação de endereço de carteira e mint de token, existe exatamente um endereço de associated token account. Esta abordagem torna simples encontrar a token account de um usuário para qualquer mint de token, eliminando a necessidade de rastrear endereços de token account separadamente.

O Associated Token Program funciona como um programa auxiliar que cria token accounts com endereços determinísticos (PDAs). Ao criar uma associated token account, o Associated Token Program faz um CPI (Cross-Program Invocation) para o Token Program ou Token Extensions Program. O token program possui a conta criada que tem a mesma estrutura de tipo Account conforme definido no token program. O Associated Token Program não mantém estado - ele simplesmente oferece uma maneira padronizada de criar token accounts em um endereço determinístico que é um PDA.

Como criar uma Token Account

Para criar uma Token Account, invoque a instrução InitializeAccount. Você pode encontrar implementações desta instrução aqui.

A transação para criar uma token account precisa de duas instruções:

  1. Invocar o System Program para criar e alocar espaço para uma token account e transferir a propriedade para o Token Program.
  2. Invocar o Token Program para inicializar os dados da token account.

Typescript

import {

  airdropFactory,

  appendTransactionMessageInstructions,

  createSolanaRpc,

  createSolanaRpcSubscriptions,

  createTransactionMessage,

  generateKeyPairSigner,

  getSignatureFromTransaction,

  lamports,

  pipe,

  sendAndConfirmTransactionFactory,

  setTransactionMessageFeePayerSigner,

  setTransactionMessageLifetimeUsingBlockhash,

  signTransactionMessageWithSigners

} from "@solana/kit";

import { getCreateAccountInstruction } from "@solana-program/system";

import {

  getInitializeAccount2Instruction,

  getInitializeMintInstruction,

  getMintSize,

  getTokenSize,

  TOKEN_2022_PROGRAM_ADDRESS

} from "@solana-program/token-2022";



// Create Connection, local validator in this example

const rpc = createSolanaRpc("http://127.0.0.1:8899");

const rpcSubscriptions = createSolanaRpcSubscriptions("ws://localhost:8900");



// Get latest blockhash to include in transaction

const { value: latestBlockhash } = await rpc.getLatestBlockhash().send();



// Generate keypairs for fee payer

const feePayer = await generateKeyPairSigner();



// Fund fee payer

await airdropFactory({ rpc, rpcSubscriptions })({

  recipientAddress: feePayer.address,

  lamports: lamports(1_000_000_000n),

  commitment: "confirmed"

});



// Generate keypair to use as address of mint

const mint = await generateKeyPairSigner();



// Get default mint account size (in bytes), no extensions enabled

const space = BigInt(getMintSize());



// Get minimum balance for rent exemption

const rent = await rpc.getMinimumBalanceForRentExemption(space).send();



// Instruction to create new account for mint (token 2022 program)

// Invokes the system program

const createAccountInstruction = getCreateAccountInstruction({

  payer: feePayer,

  newAccount: mint,

  lamports: rent,

  space,

  programAddress: TOKEN_2022_PROGRAM_ADDRESS

});



// Instruction to initialize mint account data

// Invokes the token 2022 program

const initializeMintInstruction = getInitializeMintInstruction({

  mint: mint.address,

  decimals: 2,

  mintAuthority: feePayer.address

});



const instructions = [createAccountInstruction, initializeMintInstruction];



// Create transaction message

const transactionMessage = pipe(

  createTransactionMessage({ version: 0 }), // Create transaction message

  (tx) => setTransactionMessageFeePayerSigner(feePayer, tx), // Set fee payer

  (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx), // Set transaction blockhash

  (tx) => appendTransactionMessageInstructions(instructions, tx) // Append instructions

);



// Sign transaction message with required signers (fee payer and mint keypair)

const signedTransaction =

  await signTransactionMessageWithSigners(transactionMessage);



// Send and confirm transaction

await sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(

  signedTransaction,

  { commitment: "confirmed" }

);



// Get transaction signature

const transactionSignature = getSignatureFromTransaction(signedTransaction);



console.log("Mint Address: ", mint.address);

console.log("Transaction Signature: ", transactionSignature);



// Generate keypair to use as address of token account

const tokenAccount = await generateKeyPairSigner();



// Get token account size (in bytes)

const tokenAccountSpace = BigInt(getTokenSize());



// Get minimum balance for rent exemption

const tokenAccountRent = await rpc

  .getMinimumBalanceForRentExemption(tokenAccountSpace)

  .send();



// Instruction to create new account for token account (token 2022 program)

// Invokes the system program

const createTokenAccountInstruction = getCreateAccountInstruction({

  payer: feePayer,

  newAccount: tokenAccount,

  lamports: tokenAccountRent,

  space: tokenAccountSpace,

  programAddress: TOKEN_2022_PROGRAM_ADDRESS

});



// Instruction to initialize token account data

// Invokes the token 2022 program

const initializeTokenAccountInstruction = getInitializeAccount2Instruction({

  account: tokenAccount.address,

  mint: mint.address,

  owner: feePayer.address

});



const instructions2 = [

  createTokenAccountInstruction,

  initializeTokenAccountInstruction

];



// Create transaction message for token account creation

const tokenAccountMessage = pipe(

  createTransactionMessage({ version: 0 }), // Create transaction message

  (tx) => setTransactionMessageFeePayerSigner(feePayer, tx), // Set fee payer

  (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash, tx), // Set transaction blockhash

  (tx) => appendTransactionMessageInstructions(instructions2, tx) // Append instructions

);



// Sign transaction message with required signers (fee payer and token account keypair)

const signedTokenAccountTx =

  await signTransactionMessageWithSigners(tokenAccountMessage);



// Send and confirm transaction

await sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(

  signedTokenAccountTx,

  { commitment: "confirmed" }

);



// Get transaction signature

const tokenAccountTxSignature =

  getSignatureFromTransaction(signedTokenAccountTx);



console.log("Token Account Address:", tokenAccount.address);

console.log("Transaction Signature:", tokenAccountTxSignature);
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Rust

use anyhow::Result;

use solana_client::rpc_client::RpcClient;

use solana_sdk::{

    commitment_config::CommitmentConfig,

    program_pack::Pack,

    signature::{Keypair, Signer},

    system_instruction::create_account,

    transaction::Transaction,

};

use spl_token_2022::{

    id as token_2022_program_id,

    instruction::{initialize_account, initialize_mint},

    state::{Account, Mint},

};



fn main() -> Result<()> {

    // Create connection to local validator

    let client = RpcClient::new_with_commitment(

        String::from("http://127.0.0.1:8899"),

        CommitmentConfig::confirmed(),

    );

    let recent_blockhash = client.get_latest_blockhash()?;



    // Generate a new keypair for the fee payer

    let fee_payer = Keypair::new();



    // Airdrop 1 SOL to fee payer

    let airdrop_signature = client.request_airdrop(&fee_payer.pubkey(), 1_000_000_000)?;

    client.confirm_transaction(&airdrop_signature)?;



    loop {

        let confirmed = client.confirm_transaction(&airdrop_signature)?;

        if confirmed {

            break;

        }

    }



    // Generate keypair to use as address of mint

    let mint = Keypair::new();



    // Get default mint account size (in bytes), no extensions enabled

    let mint_space = Mint::LEN;

    let mint_rent = client.get_minimum_balance_for_rent_exemption(mint_space)?;



    // Instruction to create new account for mint (token 2022 program)

    let create_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 mint account data

    let initialize_mint_instruction = initialize_mint(

        &token_2022_program_id(),

        &mint.pubkey(),            // mint

        &fee_payer.pubkey(),       // mint authority

        Some(&fee_payer.pubkey()), // freeze authority

        2,                         // decimals

    )?;



    // Create transaction and add instructions

    let transaction = Transaction::new_signed_with_payer(

        &[create_account_instruction, initialize_mint_instruction],

        Some(&fee_payer.pubkey()),

        &[&fee_payer, &mint],

        recent_blockhash,

    );



    // Send and confirm transaction

    let transaction_signature = client.send_and_confirm_transaction(&transaction)?;



    println!("Mint Address: {}", mint.pubkey());

    println!("Transaction Signature: {}", transaction_signature);



    // Generate keypair to use as address of token account

    let token_account = Keypair::new();



    // Get token account size (in bytes)

    let token_account_space = Account::LEN;

    let token_account_rent = client.get_minimum_balance_for_rent_exemption(token_account_space)?;



    // Instruction to create new account for token account (token 2022 program)

    let create_token_account_instruction = create_account(

        &fee_payer.pubkey(),        // payer

        &token_account.pubkey(),    // new account (token account)

        token_account_rent,         // lamports

        token_account_space as u64, // space

        &token_2022_program_id(),   // program id

    );



    // Instruction to initialize token account data

    let initialize_token_account_instruction = initialize_account(

        &token_2022_program_id(),

        &token_account.pubkey(), // account

        &mint.pubkey(),          // mint

        &fee_payer.pubkey(),     // owner

    )?;



    // Create transaction and add instructions

    let transaction = Transaction::new_signed_with_payer(

        &[

            create_token_account_instruction,

            initialize_token_account_instruction,

        ],

        Some(&fee_payer.pubkey()),

        &[&fee_payer, &token_account],

        recent_blockhash,

    );



    // Send and confirm transaction

    let transaction_signature = client.send_and_confirm_transaction(&transaction)?;



    println!("Token Account Address: {}", token_account.pubkey());

    println!("Transaction Signature: {}", transaction_signature);



    Ok(())

}
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Como criar uma Associated Token Account

Para criar uma Associated Token Account, invoque a instrução Create. Você pode encontrar implementações desta instrução aqui.

A instrução para criar uma associated token account invoca automaticamente o System Program para criar a token account e invoca o Token Program para inicializar os dados da token account. Isso acontece através de Cross Program Invocations (CPI).

Typescript

import {

  airdropFactory,

  appendTransactionMessageInstructions,

  createSolanaRpc,

  createSolanaRpcSubscriptions,

  createTransactionMessage,

  generateKeyPairSigner,

  getSignatureFromTransaction,

  lamports,

  pipe,

  sendAndConfirmTransactionFactory,

  setTransactionMessageFeePayerSigner,

  setTransactionMessageLifetimeUsingBlockhash,

  signTransactionMessageWithSigners

} from "@solana/kit";

import { getCreateAccountInstruction } from "@solana-program/system";

import {

  getCreateAssociatedTokenInstructionAsync,

  getInitializeMintInstruction,

  getMintSize,

  TOKEN_2022_PROGRAM_ADDRESS,

  findAssociatedTokenPda

} from "@solana-program/token-2022";



// Create Connection, local validator in this example

const rpc = createSolanaRpc("http://127.0.0.1:8899");

const rpcSubscriptions = createSolanaRpcSubscriptions("ws://localhost:8900");



// Generate keypairs for fee payer

const feePayer = await generateKeyPairSigner();



// Fund fee payer

await airdropFactory({ rpc, rpcSubscriptions })({

  recipientAddress: feePayer.address,

  lamports: lamports(1_000_000_000n),

  commitment: "confirmed"

});



// Generate keypair to use as address of mint

const mint = await generateKeyPairSigner();



// Get default mint account size (in bytes), no extensions enabled

const space = BigInt(getMintSize());



// Get minimum balance for rent exemption

const rent = await rpc.getMinimumBalanceForRentExemption(space).send();



// Get latest blockhash to include in transaction

const { value: latestBlockhash } = await rpc.getLatestBlockhash().send();



// Instruction to create new account for mint (token 2022 program)

// Invokes the system program

const createAccountInstruction = getCreateAccountInstruction({

  payer: feePayer,

  newAccount: mint,

  lamports: rent,

  space,

  programAddress: TOKEN_2022_PROGRAM_ADDRESS

});



// Instruction to initialize mint account data

// Invokes the token 2022 program

const initializeMintInstruction = getInitializeMintInstruction({

  mint: mint.address,

  decimals: 2,

  mintAuthority: feePayer.address

});



const instructions = [createAccountInstruction, initializeMintInstruction];



// Create transaction message

const transactionMessage = pipe(

  createTransactionMessage({ version: 0 }),

  (tx) => setTransactionMessageFeePayerSigner(feePayer, 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" }

);



// Get transaction signature

const transactionSignature = getSignatureFromTransaction(signedTransaction);



console.log("Mint Address: ", mint.address.toString());

console.log("Transaction Signature: ", transactionSignature);



// Use findAssociatedTokenPda to derive the ATA address

const [associatedTokenAddress] = await findAssociatedTokenPda({

  mint: mint.address,

  owner: feePayer.address,

  tokenProgram: TOKEN_2022_PROGRAM_ADDRESS

});



console.log(

  "Associated Token Account Address: ",

  associatedTokenAddress.toString()

);



// Get a fresh blockhash for the second transaction

const { value: latestBlockhash2 } = await rpc.getLatestBlockhash().send();



// Create instruction to create the associated token account

const createAtaInstruction = await getCreateAssociatedTokenInstructionAsync({

  payer: feePayer,

  mint: mint.address,

  owner: feePayer.address

});



// Create transaction message

const transactionMessage2 = pipe(

  createTransactionMessage({ version: 0 }),

  (tx) => setTransactionMessageFeePayerSigner(feePayer, tx),

  (tx) => setTransactionMessageLifetimeUsingBlockhash(latestBlockhash2, tx),

  (tx) => appendTransactionMessageInstructions([createAtaInstruction], tx)

);



// Sign transaction message with all required signers

const signedTransaction2 =

  await signTransactionMessageWithSigners(transactionMessage2);



// Send and confirm transaction

await sendAndConfirmTransactionFactory({ rpc, rpcSubscriptions })(

  signedTransaction2,

  { commitment: "confirmed" }

);



// Get transaction signature

const transactionSignature2 = getSignatureFromTransaction(signedTransaction2);

console.log("Transaction Signature: ", transactionSignature2);
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Rust

use anyhow::Result;

use solana_client::rpc_client::RpcClient;

use solana_sdk::{

    commitment_config::CommitmentConfig,

    program_pack::Pack,

    signature::{Keypair, Signer},

    system_instruction::create_account,

    transaction::Transaction,

};

use spl_associated_token_account::{

    get_associated_token_address_with_program_id, instruction::create_associated_token_account,

};

use spl_token_2022::{id as token_2022_program_id, instruction::initialize_mint, state::Mint};



fn main() -> Result<()> {

    // Create connection to local validator

    let client = RpcClient::new_with_commitment(

        String::from("http://127.0.0.1:8899"),

        CommitmentConfig::confirmed(),

    );

    let recent_blockhash = client.get_latest_blockhash()?;



    // Generate a new keypair for the fee payer

    let fee_payer = Keypair::new();



    // Airdrop 1 SOL to fee payer

    let airdrop_signature = client.request_airdrop(&fee_payer.pubkey(), 1_000_000_000)?;

    client.confirm_transaction(&airdrop_signature)?;



    loop {

        let confirmed = client.confirm_transaction(&airdrop_signature)?;

        if confirmed {

            break;

        }

    }



    // Generate keypair to use as address of mint

    let mint = Keypair::new();



    // Get default mint account size (in bytes), no extensions enabled

    let mint_space = Mint::LEN;

    let mint_rent = client.get_minimum_balance_for_rent_exemption(mint_space)?;



    // Instruction to create new account for mint (token 2022 program)

    let create_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 mint account data

    let initialize_mint_instruction = initialize_mint(

        &token_2022_program_id(),

        &mint.pubkey(),            // mint

        &fee_payer.pubkey(),       // mint authority

        Some(&fee_payer.pubkey()), // freeze authority

        2,                         // decimals

    )?;



    // Create transaction and add instructions

    let transaction = Transaction::new_signed_with_payer(

        &[create_account_instruction, initialize_mint_instruction],

        Some(&fee_payer.pubkey()),

        &[&fee_payer, &mint],

        recent_blockhash,

    );



    // Send and confirm transaction

    let transaction_signature = client.send_and_confirm_transaction(&transaction)?;



    println!("Mint Address: {}", mint.pubkey());

    println!("Transaction Signature: {}", transaction_signature);



    // Get the latest blockhash for the next transaction

    let recent_blockhash = client.get_latest_blockhash()?;



    // Derive the associated token account address for fee_payer

    let associated_token_account = get_associated_token_address_with_program_id(

        &fee_payer.pubkey(),      // owner

        &mint.pubkey(),           // mint

        &token_2022_program_id(), // program_id

    );



    // Instruction to create associated token account

    let create_ata_instruction = create_associated_token_account(

        &fee_payer.pubkey(),      // funding address

        &fee_payer.pubkey(),      // wallet address

        &mint.pubkey(),           // mint address

        &token_2022_program_id(), // program id

    );



    // Create transaction and add instruction

    let transaction = Transaction::new_signed_with_payer(

        &[create_ata_instruction],

        Some(&fee_payer.pubkey()),

        &[&fee_payer],

        recent_blockhash,

    );



    // Send and confirm transaction

    let transaction_signature = client.send_and_confirm_transaction(&transaction)?;



    println!(

        "Associated Token Account Address: {}",

        associated_token_account

    );

    println!("Transaction Signature: {}", transaction_signature);



    Ok(())

}
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