每个代币账户都包含有关代币的信息，例如所有者、铸币厂、金额（余额）。

import { clusterApiUrl, Connection, PublicKey } from "@solana/web3.js";
import { getAccount } from "@solana/spl-token";

(async () => {
  const connection = new Connection(clusterApiUrl("devnet"), "confirmed");

  const tokenAccountPubkey = new PublicKey(
    "2XYiFjmU1pCXmC2QfEAghk6S7UADseupkNQdnRBXszD5",
  );

  let tokenAccount = await getAccount(connection, tokenAccountPubkey);
  console.log(tokenAccount);
  /*
  {
    address: PublicKey {
      _bn: <BN: 16aef79dfadb39ffedb3b6f77688b8c162b18bb9cba2ffefe152303629ae3030>
    },
    mint: PublicKey {
      _bn: <BN: 7351e5e067cc7cfefef42e78915d3c513edbb8adeeab4d9092e814fe68c39fec>
    },
    owner: PublicKey {
      _bn: <BN: df30e6ca0981c1a677eed6f7cb46b2aa442ca9b7a10a10e494badea4b9b6944f>
    },
    amount: 0n,
    delegate: null,
    delegatedAmount: 0n,
    isInitialized: true,
    isFrozen: false,
    isNative: false,
    rentExemptReserve: null,
    closeAuthority: null
  }
  */
})();

https://solana.com/zh/developers/cookbook/tokens/get-token-account

用户需要一个代币账户来持有代币。
用户对其拥有的每种类型的代币至少拥有一个代币账户。
关联代币账户是针对每个密钥对确定性创建的账户。ATA 是管理代币账户的推荐方法。

import {
  clusterApiUrl,
  Connection,
  PublicKey,
  Keypair,
  Transaction,
  sendAndConfirmTransaction,
} from "@solana/web3.js";
import {
  createAssociatedTokenAccount,
  getAssociatedTokenAddress,
  createAssociatedTokenAccountInstruction,
} from "@solana/spl-token";
import bs58 from "bs58";

(async () => {
  // connection
  const connection = new Connection(clusterApiUrl("devnet"), "confirmed");

  // 5YNmS1R9nNSCDzb5a7mMJ1dwK9uHeAAF4CmPEwKgVWr8
  const feePayer = Keypair.fromSecretKey(
    bs58.decode(
      "588FU4PktJWfGfxtzpAAXywSNt74AvtroVzGfKkVN1LwRuvHwKGr851uH8czM5qm4iqLbs1kKoMKtMJG4ATR7Ld2",
    ),
  );

  // G2FAbFQPFa5qKXCetoFZQEvF9BVvCKbvUZvodpVidnoY
  const alice = Keypair.fromSecretKey(
    bs58.decode(
      "4NMwxzmYj2uvHuq8xoqhY8RXg63KSVJM1DXkpbmkUY7YQWuoyQgFnnzn6yo3CMnqZasnNPNuAT2TLwQsCaKkUddp",
    ),
  );

  const mintPubkey = new PublicKey(
    "2SKpuBU9ksneBZD4nqbZkw75NE11HsSHsGRtW2BZh5aQ",
  );

  // 1) use build-in function
  {
    let ata = await createAssociatedTokenAccount(
      connection, // connection
      feePayer, // fee payer
      mintPubkey, // mint
      alice.publicKey, // owner,
    );
    console.log(`ATA: ${ata.toBase58()}`);
  }

  // or

  // 2) composed by yourself
  {
    // calculate ATA
    let ata = await getAssociatedTokenAddress(
      mintPubkey, // mint
      alice.publicKey, // owner
    );
    console.log(`ATA: ${ata.toBase58()}`);

    // if your wallet is off-curve, you should use
    // let ata = await getAssociatedTokenAddress(
    //   mintPubkey, // mint
    //   alice.publicKey // owner
    //   true, // allowOwnerOffCurve
    // );

    let transaction = new Transaction().add(
      createAssociatedTokenAccountInstruction(
        feePayer.publicKey, // payer
        ata, // ata
        alice.publicKey, // owner
        mintPubkey, // mint
      ),
    );

    const signature = await sendAndConfirmTransaction(
      connection,
      transaction,
      [feePayer], // Signers
    );

    console.log(`txhash: ${await signature}`);
  }
})();

https://solana.com/zh/developers/cookbook/tokens/create-token-account

为了获取代币的当前供应量、权限或小数，您需要获取代币铸造的帐户信息

import { clusterApiUrl, Connection, PublicKey } from "@solana/web3.js";
import { getMint } from "@solana/spl-token";

(async () => {
  const connection = new Connection(clusterApiUrl("devnet"), "confirmed");

  const mintAccountPublicKey = new PublicKey(
    "8mAKLjGGmjKTnmcXeyr3pr7iX13xXVjJJiL6RujDbSPV",
  );

  let mintAccount = await getMint(connection, mintAccountPublicKey);

  console.log(mintAccount);
  /*
  {
    address: PublicKey {
      _bn: <BN: 7351e5e067cc7cfefef42e78915d3c513edbb8adeeab4d9092e814fe68c39fec>
    },
    mintAuthority: PublicKey {
      _bn: <BN: df30e6ca0981c1a677eed6f7cb46b2aa442ca9b7a10a10e494badea4b9b6944f>
    },
    supply: 0n,
    decimals: 8,
    isInitialized: true,
    freezeAuthority: PublicKey {
      _bn: <BN: df30e6ca0981c1a677eed6f7cb46b2aa442ca9b7a10a10e494badea4b9b6944f>
    }
  }
  */
})();

https://solana.com/zh/developers/cookbook/tokens/get-token-mint

创建代币是通过创建所谓的“铸币账户”来完成的。这个铸币账户稍后会用来将代币铸入用户的代币账户。

import {
  clusterApiUrl,
  Connection,
  Keypair,
  sendAndConfirmTransaction,
  SystemProgram,
  Transaction,
} from "@solana/web3.js";
import {
  createInitializeMintInstruction,
  TOKEN_PROGRAM_ID,
  MINT_SIZE,
  getMinimumBalanceForRentExemptMint,
  createMint,
} from "@solana/spl-token";
import bs58 from "bs58";

(async () => {
  // connection
  const connection = new Connection(clusterApiUrl("devnet"), "confirmed");
  const recentBlockhash = await connection.getLatestBlockhash();

  // 5YNmS1R9nNSCDzb5a7mMJ1dwK9uHeAAF4CmPEwKgVWr8
  const feePayer = Keypair.fromSecretKey(
    bs58.decode(
      "588FU4PktJWfGfxtzpAAXywSNt74AvtroVzGfKkVN1LwRuvHwKGr851uH8czM5qm4iqLbs1kKoMKtMJG4ATR7Ld2",
    ),
  );

  // G2FAbFQPFa5qKXCetoFZQEvF9BVvCKbvUZvodpVidnoY
  const alice = Keypair.fromSecretKey(
    bs58.decode(
      "4NMwxzmYj2uvHuq8xoqhY8RXg63KSVJM1DXkpbmkUY7YQWuoyQgFnnzn6yo3CMnqZasnNPNuAT2TLwQsCaKkUddp",
    ),
  );

  // 1) use build-in function
  let mintPubkey = await createMint(
    connection, // connection
    feePayer, // fee payer
    alice.publicKey, // mint authority
    alice.publicKey, // freeze authority (you can use `null` to disable it. when you disable it, you can't turn it on again)
    8, // decimals
  );
  console.log(`mint: ${mintPubkey.toBase58()}`);

  // or

  // 2) compose by yourself
  const mint = Keypair.generate();
  console.log(`mint: ${mint.publicKey.toBase58()}`);

  const transaction = new Transaction().add(
    // create mint account
    SystemProgram.createAccount({
      fromPubkey: feePayer.publicKey,
      newAccountPubkey: mint.publicKey,
      space: MINT_SIZE,
      lamports: await getMinimumBalanceForRentExemptMint(connection),
      programId: TOKEN_PROGRAM_ID,
    }),
    // init mint account
    createInitializeMintInstruction(
      mint.publicKey, // mint pubkey
      8, // decimals
      alice.publicKey, // mint authority
      alice.publicKey, // freeze authority (you can use `null` to disable it. when you disable it, you can't turn it on again)
    ),
  );

  // Send transaction
  const transactionSignature = await sendAndConfirmTransaction(
    connection,
    transaction,
    [feePayer, mint], // Signers
  );

  console.log(`txhash: ${transactionSignature}`);
})();

https://solana.com/zh/developers/cookbook/tokens/create-mint-account

由于 Solana 中的程序是无状态的，因此作为程序创建者，我们必须确保传递的帐户尽可能得到验证，以避免任何恶意帐户进入。可以进行的基本检查包括

1. 检查预期签名者帐户是否确实已签名
2. 检查预期状态帐户是否已被检查为可写
3. 检查预期状态账户的所有者是否是被调用的程序 ID
4. 如果第一次初始化状态，请检查账户是否已经初始化。
5. 检查传递的任何跨程序 ID（无论何时需要）是否符合预期。

初始化HelloState账户的基本指令，但使用上述检查，定义如下

use borsh::{BorshDeserialize, BorshSerialize};
use solana_program::{
    account_info::{next_account_info, AccountInfo},
    clock::Clock,
    entrypoint,
    entrypoint::ProgramResult,
    msg,
    program_error::ProgramError,
    pubkey::Pubkey,
    rent::Rent,
    system_program::ID as SYSTEM_PROGRAM_ID,
    sysvar::Sysvar,
};

entrypoint!(process_instruction);

#[derive(BorshSerialize, BorshDeserialize, Debug)]
pub struct HelloState {
    is_initialized: bool,
}

// Accounts required
/// 1. [signer] Payer
/// 2. [writable] Hello state account
/// 3. [] System Program
pub fn process_instruction(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    _instruction_data: &[u8],
) -> ProgramResult {
    let accounts_iter = &mut accounts.iter();
    // Payer account
    let payer_account = next_account_info(accounts_iter)?;
    // Hello state account
    let hello_state_account = next_account_info(accounts_iter)?;
    // System Program
    let system_program = next_account_info(accounts_iter)?;

    let rent = Rent::get()?;

    // 检查付款人账户是否是签名者
    if !payer_account.is_signer {
        return Err(ProgramError::MissingRequiredSignature);
    }

    // 检查 Hello State 账户是否免租
    if !rent.is_exempt(hello_state_account.lamports(), 1) {
        return Err(ProgramError::AccountNotRentExempt);
    }

    // 检查 hello 状态帐户是否可写
    if !hello_state_account.is_writable {
        return Err(ProgramError::InvalidAccountData);
    }

    // 检查 hello 状态账户的所有者是否是当前程序
    if hello_state_account.owner.ne(&program_id) {
        return Err(ProgramError::IllegalOwner);
    }

    // 检查系统程序是否有效
    if system_program.key.ne(&SYSTEM_PROGRAM_ID) {
        return Err(ProgramError::IncorrectProgramId);
    }

    let mut hello_state = HelloState::try_from_slice(&hello_state_account.data.borrow())?;

    // 检查状态是否已初始化
    if hello_state.is_initialized {
        return Err(ProgramError::AccountAlreadyInitialized);
    }

    hello_state.is_initialized = true;
    hello_state.serialize(&mut &mut hello_state_account.data.borrow_mut()[..])?;
    msg!("Account initialized :)");

    Ok(())
}

https://solana.com/zh/developers/cookbook/programs/verify-accounts