Solana 문서Solana의 토큰확장 프로그램기밀 전송

대기 중인 잔액 적용하기

대기 중인 잔액을 사용 가능한 잔액으로 적용하는 방법

토큰을 기밀적으로 전송하기 전에 공개 토큰 잔액을 기밀 잔액으로 변환해야 합니다. 이 변환은 두 단계로 진행됩니다:

  1. 기밀 대기 잔액: 처음에는 토큰이 공개 잔액에서 "대기 중인" 기밀 잔액으로 "입금"됩니다.
  2. 기밀 사용 가능 잔액: 그런 다음 대기 잔액이 사용 가능한 잔액으로 "적용"되어 토큰을 기밀 전송에 사용할 수 있게 됩니다.

이 섹션에서는 두 번째 단계인 대기 잔액을 사용 가능한 잔액으로 적용하는 방법을 설명합니다.

토큰이 공개 잔액에서 "입금"되거나 토큰이 한 token account에서 다른 token account로 기밀적으로 전송될 때, 토큰은 처음에 기밀 대기 잔액에 추가됩니다. 토큰을 기밀 전송에 사용하기 전에 대기 잔액을 사용 가능한 잔액으로 "적용"해야 합니다.

Apply Pending Balance

다음 다이어그램은 대기 잔액을 사용 가능한 잔액으로 적용하는 단계를 보여줍니다:

Apply Pending Balance

필수 명령어

대기 잔액을 사용 가능한 잔액으로 변환하려면 ConfidentialTransferInstruction::ApplyPendingBalance 명령어를 호출하세요.

spl_token_client 크레이트는 아래 예제에서 보여주는 것처럼 ApplyPendingBalance 명령어가 포함된 트랜잭션을 구축하고 전송하는 confidential_transfer_apply_pending_balance 메서드를 제공합니다.

예제 코드

다음 예제는 기밀 대기 잔액을 기밀 사용 가능 잔액으로 적용하는 방법을 보여줍니다.

예제를 실행하려면 다음 명령어를 사용하여 메인넷에서 복제된 Token Extension Program으로 로컬 validator를 시작하세요. 로컬 validator를 시작하려면 Solana CLI가 설치되어 있어야 합니다.

Terminal
$ 
solana-test-validator --clone-upgradeable-program TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb --url https://api.mainnet-beta.solana.com -r

작성 시점에서는 기본 로컬 validator에서 기밀 전송(Confidential Transfers)이 활성화되어 있지 않습니다. 예제 코드를 실행하려면 메인넷 Token Extensions Program을 복제해야 합니다.

use anyhow::{Context, Result};

use solana_client::nonblocking::rpc_client::RpcClient;

use solana_sdk::{

    commitment_config::CommitmentConfig,

    signature::{Keypair, Signer},

    transaction::Transaction,

};

use spl_associated_token_account::{

    get_associated_token_address_with_program_id, instruction::create_associated_token_account,

};

use spl_token_client::{

    client::{ProgramRpcClient, ProgramRpcClientSendTransaction},

    spl_token_2022::{

        extension::{

            confidential_transfer::instruction::{configure_account, PubkeyValidityProofData},

            ExtensionType,

        },

        id as token_2022_program_id,

        instruction::reallocate,

        solana_zk_sdk::encryption::{auth_encryption::*, elgamal::*},

    },

    token::{ExtensionInitializationParams, Token},

};

use spl_token_confidential_transfer_proof_extraction::instruction::{ProofData, ProofLocation};

use std::sync::Arc;



#[tokio::main]

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

    // Create connection to local test validator

    let rpc_client = Arc::new(RpcClient::new_with_commitment(

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

        CommitmentConfig::confirmed(),

    ));



    // Load the default Solana CLI keypair to use as the fee payer

    // This will be the wallet paying for the transaction fees

    // Use Arc to prevent multiple clones of the keypair

    let payer = Arc::new(load_keypair()?);

    println!("Using payer: {}", payer.pubkey());



    // Generate a new keypair to use as the address of the token mint

    let mint = Keypair::new();

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



    // Set up program client for Token client

    let program_client = ProgramRpcClient::new(rpc_client.clone(), ProgramRpcClientSendTransaction);



    // Number of decimals for the mint

    let decimals = 9;



    // Create a token client for the Token-2022 program

    // This provides high-level methods for token operations

    let token = Token::new(

        Arc::new(program_client),

        &token_2022_program_id(), // Use the Token-2022 program (newer version with extensions)

        &mint.pubkey(),           // Address of the new token mint

        Some(decimals),           // Number of decimal places

        payer.clone(),            // Fee payer for transactions

    );



    // Create extension initialization parameters for the mint

    // The ConfidentialTransferMint extension enables confidential (private) transfers of tokens

    let extension_initialization_params =

        vec![ExtensionInitializationParams::ConfidentialTransferMint {

            authority: Some(payer.pubkey()), // Authority that can modify confidential transfer settings

            auto_approve_new_accounts: true, // Automatically approve new confidential accounts

            auditor_elgamal_pubkey: None,    // Optional auditor ElGamal public key

        }];



    // Create and initialize the mint with the ConfidentialTransferMint extension

    // This sends a transaction to create the new token mint

    let transaction_signature = token

        .create_mint(

            &payer.pubkey(),                 // Mint authority - can mint new tokens

            Some(&payer.pubkey()),           // Freeze authority - can freeze token accounts

            extension_initialization_params, // Add the ConfidentialTransferMint extension

            &[&mint],                        // Mint keypair needed as signer

        )

        .await?;



    // Print results for user verification

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

    println!(

        "Mint Creation Transaction Signature: {}",

        transaction_signature

    );



    // ===== Create and configure token account for confidential transfers =====

    println!("\nCreate and configure token account for confidential transfers");



    // Get the associated token account address for the owner

    let token_account_pubkey = get_associated_token_address_with_program_id(

        &payer.pubkey(),          // Token account owner

        &mint.pubkey(),           // Mint

        &token_2022_program_id(), // Token program ID

    );

    println!("Token Account Address: {}", token_account_pubkey);



    // Step 1: Create the associated token account

    let create_associated_token_account_instruction = create_associated_token_account(

        &payer.pubkey(),          // Funding account

        &payer.pubkey(),          // Token account owner

        &mint.pubkey(),           // Mint

        &token_2022_program_id(), // Token program ID

    );



    // Step 2: Reallocate the token account to include space for the ConfidentialTransferAccount extension

    let reallocate_instruction = reallocate(

        &token_2022_program_id(),                      // Token program ID

        &token_account_pubkey,                         // Token account

        &payer.pubkey(),                               // Payer

        &payer.pubkey(),                               // Token account owner

        &[&payer.pubkey()],                            // Signers

        &[ExtensionType::ConfidentialTransferAccount], // Extension to reallocate space for

    )?;



    // Step 3: Generate the ElGamal keypair and AES key for token account

    let elgamal_keypair = ElGamalKeypair::new_from_signer(&payer, &token_account_pubkey.to_bytes())

        .expect("Failed to create ElGamal keypair");

    let aes_key = AeKey::new_from_signer(&payer, &token_account_pubkey.to_bytes())

        .expect("Failed to create AES key");



    // The maximum number of Deposit and Transfer instructions that can

    // credit pending_balance before the ApplyPendingBalance instruction is executed

    let maximum_pending_balance_credit_counter = 65536;



    // Initial token balance is 0

    let decryptable_balance = aes_key.encrypt(0);



    // Generate the proof data client-side

    let proof_data = PubkeyValidityProofData::new(&elgamal_keypair)

        .map_err(|_| anyhow::anyhow!("Failed to generate proof data"))?;



    // Indicate that proof is included in the same transaction

    let proof_location =

        ProofLocation::InstructionOffset(1.try_into()?, ProofData::InstructionData(&proof_data));



    // Step 4: Create instructions to configure the account for confidential transfers

    let configure_account_instructions = configure_account(

        &token_2022_program_id(),               // Program ID

        &token_account_pubkey,                  // Token account

        &mint.pubkey(),                         // Mint

        &decryptable_balance.into(),            // Initial balance

        maximum_pending_balance_credit_counter, // Maximum pending balance credit counter

        &payer.pubkey(),                        // Token Account Owner

        &[],                                    // Additional signers

        proof_location,                         // Proof location

    )?;



    // Combine all instructions

    let mut instructions = vec![

        create_associated_token_account_instruction,

        reallocate_instruction,

    ];

    instructions.extend(configure_account_instructions);



    // Create and send the transaction

    let recent_blockhash = rpc_client.get_latest_blockhash().await?;

    let transaction = Transaction::new_signed_with_payer(

        &instructions,

        Some(&payer.pubkey()),

        &[&payer],

        recent_blockhash,

    );



    let transaction_signature = rpc_client

        .send_and_confirm_transaction(&transaction)

        .await?;

    println!(

        "Create Token Account Transaction Signature: {}",

        transaction_signature

    );



    // Mint some tokens to the newly created token account

    // This gives the account some tokens to work with

    let mint_signature = token

        .mint_to(

            &token_account_pubkey,            // Destination account

            &payer.pubkey(),                  // Mint authority

            100 * 10u64.pow(decimals as u32), // Amount (100 tokens with decimal precision)

            &[&payer],                        // Signers

        )

        .await?;



    println!("Mint Tokens Transaction Signature: {}", mint_signature);



    // Deposit the tokens to confidential state

    // This converts regular tokens to confidential tokens

    println!("Deposit tokens to confidential state pending balance");

    let deposit_signature = token

        .confidential_transfer_deposit(

            &token_account_pubkey,            // The token account

            &payer.pubkey(),                  // Authority (owner) of the account

            100 * 10u64.pow(decimals as u32), // Amount to deposit (100 tokens)

            decimals,                         // Decimals of the token

            &[&payer],                        // Signers (owner must sign)

        )

        .await?;



    println!(

        "Confidential Transfer Deposit Signature: {}",

        deposit_signature

    );



    // Apply the pending balance to make funds available

    println!("Apply pending balance to available balance");

    let apply_signature = token

        .confidential_transfer_apply_pending_balance(

            &token_account_pubkey,    // The token account

            &payer.pubkey(),          // Authority (owner) of the account

            None,                     // Optional new decryptable available balance

            elgamal_keypair.secret(), // ElGamal keypair for public-key cryptography (decryption and ZK proofs)

            &aes_key,                 // AES key for encryption of balance and transfer amounts

            &[&payer],                // Signers (owner must sign)

        )

        .await?;



    println!("Apply Pending Balance Signature: {}", apply_signature);



    println!("Confidential transfer setup complete. Tokens are now in available balance.");

    println!(

        "Associated Token Account with confidential transfers: {}",

        token_account_pubkey

    );



    Ok(())

}



// Load the keypair from the default Solana CLI keypair path (~/.config/solana/id.json)

// This enables using the same wallet as the Solana CLI tools

fn load_keypair() -> Result<Keypair> {

    // Get the default keypair path

    let keypair_path = dirs::home_dir()

        .context("Could not find home directory")?

        .join(".config/solana/id.json");



    // Read the keypair file directly into bytes using serde_json

    // The keypair file is a JSON array of bytes

    let file = std::fs::File::open(&keypair_path)?;

    let keypair_bytes: Vec<u8> = serde_json::from_reader(file)?;



    // Create keypair from the loaded bytes

    // This converts the byte array into a keypair

    let keypair = Keypair::from_bytes(&keypair_bytes)?;



    Ok(keypair)

}
ConsolePowered by Mirror
Click to execute the code.

Is this page helpful?

이전

토큰 예치하기

다음

토큰 출금하기

목차

페이지 편집

관리자

© 2025 솔라나 재단. 모든 권리 보유.
솔라나
연결하기
© 2025 솔라나 재단. 모든 권리 보유.