Confidential Transfer
Τι είναι τα Confidential Transfers;
Τα confidential transfers σας επιτρέπουν να μεταφέρετε tokens μεταξύ token accounts χωρίς να αποκαλύπτεται το ποσό της μεταφοράς. Αυτό είναι χρήσιμο για συναλλαγές που διαφυλάσσουν την ιδιωτικότητα. Μόνο τα ποσά μεταφοράς και τα υπόλοιπα των tokens είναι ιδιωτικά. Οι διευθύνσεις των token accounts παραμένουν δημόσιες.
- Επισκόπηση Πρωτοκόλλου - Λεπτομέρειες σχετικά με το υποκείμενο κρυπτογραφικό πρωτόκολλο
- Οδηγός Γρήγορης Εκκίνησης - Ρύθμιση και βασικές εντολές CLI
- Οδηγός Confidential Balances - Αποσπάσματα κώδικα για τη χρήση της επέκτασης Confidential Transfer
Πώς λειτουργεί;
Η επέκταση Confidential Transfer προσθέτει εντολές στο Token Extensions Program που σας επιτρέπει να μεταφέρετε tokens μεταξύ λογαριασμών χωρίς να αποκαλύπτεται το ποσό της μεταφοράς.
Η βασική ροή των confidential token transfers είναι η εξής:
- Δημιουργία ενός mint account με την επέκταση confidential transfer.
- Δημιουργία token accounts με την επέκταση confidential transfer για τον αποστολέα και τον παραλήπτη.
- Έκδοση tokens στον λογαριασμό του αποστολέα.
- Κατάθεση του δημόσιου υπολοίπου του αποστολέα σε εκκρεμές εμπιστευτικό υπόλοιπο.
- Εφαρμογή του εκκρεμούς υπολοίπου του αποστολέα σε διαθέσιμο εμπιστευτικό υπόλοιπο.
- Εμπιστευτική μεταφορά tokens από τον token account του αποστολέα στον token account του παραλήπτη.
- Εφαρμογή του εκκρεμούς υπολοίπου του παραλήπτη σε διαθέσιμο εμπιστευτικό υπόλοιπο.
- Ανάληψη του διαθέσιμου εμπιστευτικού υπολοίπου του παραλήπτη σε δημόσιο υπόλοιπο.
Για περισσότερες λεπτομέρειες σχετικά με τα βήματα στη ροή της εμπιστευτικής μεταφοράς, δείτε τις αντίστοιχες σελίδες:
Δημιουργία Mint Account
Πώς να δημιουργήσετε ένα mint account με την επέκταση Confidential Transfer
Δημιουργία Token Account
Πώς να διαμορφώσετε ένα token account με την επέκταση Confidential Transfer
Κατάθεση Tokens
Πώς να καταθέσετε tokens σε εκκρεμές εμπιστευτικό υπόλοιπο
Εφαρμογή Εκκρεμούς Υπολοίπου
Πώς να εφαρμόσετε το εκκρεμές υπόλοιπο στο διαθέσιμο εμπιστευτικό υπόλοιπο
Ανάληψη Tokens
Πώς να αναλάβετε tokens από το διαθέσιμο εμπιστευτικό υπόλοιπο
Μεταφορά Tokens
Πώς να μεταφέρετε εμπιστευτικά tokens μεταξύ token accounts
Το παρακάτω διάγραμμα δείχνει μια λεπτομερή ακολουθία της βασικής ροής για εμπιστευτικές μεταφορές token:
Παράδειγμα Κώδικα
Το παρακάτω παράδειγμα σε Rust δείχνει τα βήματα για εμπιστευτικές μεταφορές token που αντιστοιχούν στο προηγούμενο διάγραμμα. Τα βήματα χωρίζονται σε βοηθητικές συναρτήσεις για μεγαλύτερη σαφήνεια.
Για να εκτελέσετε το παράδειγμα, ξεκινήστε έναν τοπικό validator με το Token Extension Program κλωνοποιημένο από το mainnet χρησιμοποιώντας την ακόλουθη εντολή. Πρέπει να έχετε εγκατεστημένο το Solana CLI για να χρησιμοποιήσετε τον τοπικό validator.
$solana-test-validator --clone-upgradeable-program TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb --url https://api.mainnet-beta.solana.com -r
Κατά τη στιγμή της συγγραφής, οι Εμπιστευτικές Μεταφορές δεν είναι ενεργοποιημένες στον προεπιλεγμένο τοπικό validator. Πρέπει να κλωνοποιήσετε το Token Extension Program του mainnet για να εκτελέσετε τον κώδικα του παραδείγματος.
use anyhow::{Context, Result};use solana_client::nonblocking::rpc_client::RpcClient;use solana_sdk::{commitment_config::CommitmentConfig,signature::{Keypair, Signer},transaction::Transaction,pubkey::Pubkey};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},account_info::{WithdrawAccountInfo, TransferAccountInfo},ConfidentialTransferAccount,},BaseStateWithExtensions, 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 spl_token_confidential_transfer_proof_generation::withdraw::WithdrawProofData;use std::sync::Arc;/// Define a type alias for the Token client to simplify type signaturestype TokenClient = Token<ProgramRpcClientSendTransaction>;/// Demonstrates the complete lifecycle of confidential tokens:/// - Creating a mint with confidential transfer extension/// - Creating token accounts configured for confidential transfer/// - Minting tokens/// - Depositing tokens from public balance to confidential pending balance/// - Applying pending balance to available balance/// - Transferring tokens confidentially between token accounts/// - Withdrawing tokens from confidential available balance to public balance#[tokio::main]async fn main() -> Result<()> {// Create connection to local test validator with confirmed commitment level// This ensures transactions are confirmed before proceedinglet 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 payerlet payer = Arc::new(load_keypair()?);println!("Payer: {}", payer.pubkey());// Generate a new keypair for the mint// This pubkey will be the address of the token mintlet mint = Keypair::new();println!("Mint keypair generated: {}", mint.pubkey());// Number of decimals for the mint// This determines the smallest unit of the token (e.g., 2 decimals means 0.01 is the smallest unit)let decimals = 2;// Create a program clientlet program_client = ProgramRpcClient::new(rpc_client.clone(), ProgramRpcClientSendTransaction);// Create a token client// This client provides high-level methods to interact with the token programlet token = Token::new(Arc::new(program_client),&token_2022_program_id(),&mint.pubkey(),Some(decimals),payer.clone(),);// Create a new mint with confidential transfer extension// This initializes the token mint with confidential transfer enabledcreate_mint(&token, &mint, payer.clone()).await?;// Create first token account (sender)// This account will be used to send tokens confidentiallylet (sender_pubkey, sender_elgamal_keypair, sender_aes_key) = create_token_account(rpc_client.clone(),payer.clone(),&mint,payer.clone(),&token_2022_program_id(),).await?;// Create second token account (recipient) with a new owner// This account will receive tokens confidentiallylet recipient_owner = Arc::new(Keypair::new());println!("Recipient owner: {}", recipient_owner.pubkey());// Fund the recipient owner account with SOL// This ensures the recipient can pay for transaction feesfund_account(rpc_client.clone(),payer.clone(),&recipient_owner.pubkey(),10_000_000, // 0.01 SOL in lamports).await?;// Create the recipient token account// This account will receive tokens from the senderlet (recipient_pubkey, recipient_elgamal_keypair, recipient_aes_key) = create_token_account(rpc_client.clone(),recipient_owner.clone(),&mint,recipient_owner.clone(),&token_2022_program_id(),).await?;// Mint tokens to sender account// This creates new tokens and increases the sender's token account public balancelet amount = 100 * 10u64.pow(decimals as u32); // 100 tokensmint_tokens(&token, &sender_pubkey, &payer, amount).await?;// Deposit tokens to confidential pending balance// This converts public balance to confidential pending balancedeposit_tokens(&token, &sender_pubkey, &payer, amount, decimals).await?;// Apply pending balance to make funds available// This converts confidential pending balance to confidential available balanceapply_pending_balance(&token,&sender_pubkey,&payer,&sender_elgamal_keypair,&sender_aes_key,).await?;// Transfer tokens from sender to recipient// This sends tokens confidentially from sender token account to recipient token accountlet transfer_amount = 50 * 10u64.pow(decimals as u32); // 50 tokenstransfer_tokens(&token,&sender_pubkey,&payer,&sender_elgamal_keypair,&sender_aes_key,&recipient_pubkey,recipient_elgamal_keypair.pubkey(),transfer_amount,payer.clone(),).await?;// Apply pending balance on recipient token account// This converts confidential pending balance to confidential available balanceapply_pending_balance(&token,&recipient_pubkey,&recipient_owner,&recipient_elgamal_keypair,&recipient_aes_key,).await?;// Withdraw half of the tokens from recipient's confidential available balance// This converts confidential available balance to public balancelet withdraw_amount = 25 * 10u64.pow(decimals as u32); // half of the 50 tokens receivedwithdraw_tokens(&token,&recipient_pubkey,&recipient_owner,&recipient_elgamal_keypair,&recipient_aes_key,withdraw_amount,recipient_owner.clone(),decimals,).await?;println!("\nAll operations completed successfully!");println!("Sender Account: {}", sender_pubkey);println!("Recipient Account: {}", recipient_pubkey);Ok(())}/// Load the keypair from the default Solana CLI keypair path////// Returns:/// - Result<Keypair>: The loaded keypair or an error if loading failsfn load_keypair() -> Result<Keypair> {// Get the default keypair path from the home directorylet keypair_path = dirs::home_dir().context("Could not find home directory")?.join(".config/solana/id.json");// Read the keypair filelet file = std::fs::File::open(&keypair_path)?;let keypair_bytes: Vec<u8> = serde_json::from_reader(file)?;// Create keypairlet keypair = Keypair::from_bytes(&keypair_bytes)?;Ok(keypair)}/// Create a new token mint with confidential transfer extension////// Arguments:/// - token: Reference to the token client for interacting with the Token-2022 program/// - mint: Reference to the keypair that will be used as the mint account's address/// - payer: Arc-wrapped keypair that will pay for the transaction fees and serve as the mint authority////// Returns:/// - Result<()>: Success or errorasync fn create_mint(token: &TokenClient, mint: &Keypair, payer: Arc<Keypair>) -> Result<()> {println!("Creating token mint with confidential transfer extension...");// Create extension initialization parameters for the mint// This configures the confidential transfer extension on the mintlet extension_initialization_params =vec![ExtensionInitializationParams::ConfidentialTransferMint {authority: Some(payer.pubkey()), // Authority that can modify confidential transfer settingsauto_approve_new_accounts: true, // Automatically approve new accounts for confidential transfersauditor_elgamal_pubkey: None, // No auditor for this example}];// Create and initialize the mint with the ConfidentialTransferMint extensionlet transaction_signature = token.create_mint(&payer.pubkey(), // Mint authoritySome(&payer.pubkey()), // Freeze authority (optional)extension_initialization_params, // Extension parameters&[mint], // Signers needed for the transaction).await?;println!("Mint Address: {}", mint.pubkey());println!("Mint Creation Transaction Signature: {}",transaction_signature);Ok(())}/// Fund an account with SOL////// Arguments:/// - rpc_client: Arc-wrapped RPC client for communicating with the Solana cluster/// - payer: Arc-wrapped keypair that will send the SOL/// - recipient: Public key of the account that will receive the SOL/// - amount: Amount of lamports (1 SOL = 1,000,000,000 lamports) to send////// Returns:/// - Result<()>: Success or errorasync fn fund_account(rpc_client: Arc<RpcClient>,payer: Arc<Keypair>,recipient: &Pubkey,amount: u64,) -> Result<()> {println!("Funding account {} with {} lamports...", recipient, amount);// Create and send a transaction to transfer SOL from payer to recipientlet fund_signature = rpc_client.send_and_confirm_transaction(&Transaction::new_signed_with_payer(&[solana_sdk::system_instruction::transfer(&payer.pubkey(), // Fromrecipient, // Toamount, // Amount in lamports)],Some(&payer.pubkey()), // Fee payer&[&payer], // Signersrpc_client.get_latest_blockhash().await?, // Recent blockhash)).await?;println!("Fund Transaction Signature: {}", fund_signature);Ok(())}/// Create and configure a token account for confidential transfers////// Arguments:/// - rpc_client: Arc-wrapped RPC client for communicating with the Solana cluster/// - payer: Arc-wrapped keypair that will pay for the transaction fees/// - mint: Reference to the keypair of the token mint/// - owner: Arc-wrapped keypair that will own the token account/// - token_program_id: Public key of the token program (Token-2022)////// Returns:/// - Result<(Pubkey, ElGamalKeypair, AeKey)>: The token account address, ElGamal keypair, and AES key for encryptionasync fn create_token_account(rpc_client: Arc<RpcClient>,payer: Arc<Keypair>,mint: &Keypair,owner: Arc<Keypair>,token_program_id: &Pubkey,) -> Result<(Pubkey, ElGamalKeypair, AeKey)> {println!("Creating token account for owner: {}", owner.pubkey());// Get the associated token account address for the owner// This is a deterministic address based on the owner and mintlet token_account_pubkey = get_associated_token_address_with_program_id(&owner.pubkey(),&mint.pubkey(),token_program_id,);println!("Token Account Address: {}", token_account_pubkey);// Step 1: Create the associated token account// This creates a token account at the deterministic addresslet create_associated_token_account_instruction = create_associated_token_account(&payer.pubkey(), // Funding account&owner.pubkey(), // Wallet address&mint.pubkey(), // Mint addresstoken_program_id, // Token program ID);// Step 2: Reallocate the token account to include space for the ConfidentialTransferAccount extension// This increases the account size to accommodate the confidential transfer datalet reallocate_instruction = reallocate(token_program_id, // Token program ID&token_account_pubkey, // Token account to reallocate&payer.pubkey(), // Payer for the reallocation&owner.pubkey(), // Owner of the token account&[&owner.pubkey()], // Signers required for the reallocation&[ExtensionType::ConfidentialTransferAccount], // Extension to allocate space for)?;// Step 3: Generate the ElGamal keypair and AES key for token account// These are used for encrypting and decrypting confidential token amountslet elgamal_keypair = ElGamalKeypair::new_from_signer(&owner, &token_account_pubkey.to_bytes()).expect("Failed to create ElGamal keypair");let aes_key = AeKey::new_from_signer(&owner, &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 must be executedlet maximum_pending_balance_credit_counter = 65536;// Initial token balance is 0// This is encrypted using the AES keylet decryptable_balance = aes_key.encrypt(0);// Generate the proof data client-side// This proves that the ElGamal public key is validlet proof_data = PubkeyValidityProofData::new(&elgamal_keypair).map_err(|_| anyhow::anyhow!("Failed to generate proof data"))?;// Indicate that proof is included as instruction data// This specifies where to find the proof data in the transactionlet proof_location =ProofLocation::InstructionOffset(1.try_into()?, ProofData::InstructionData(&proof_data));// Step 4: Create instructions to configure the account for confidential transfers// This initializes the confidential transfer extension on the token accountlet configure_account_instructions = configure_account(token_program_id, // Token program ID&token_account_pubkey, // Token account to configure&mint.pubkey(), // Mint of the token&decryptable_balance.into(), // Initial encrypted balancemaximum_pending_balance_credit_counter, // Maximum pending balance credit counter&owner.pubkey(), // Owner of the token account&[], // Additional signers (none needed)proof_location, // Location of the proof data)?;// Combine all instructionslet mut instructions = vec![create_associated_token_account_instruction,reallocate_instruction,];instructions.extend(configure_account_instructions);// Create and send the transactionlet recent_blockhash = rpc_client.get_latest_blockhash().await?;let transaction = Transaction::new_signed_with_payer(&instructions, // Instructions to executeSome(&payer.pubkey()), // Fee payer&[&payer], // Signersrecent_blockhash, // Recent blockhash);let transaction_signature = rpc_client.send_and_confirm_transaction(&transaction).await?;println!("Create Token Account Transaction Signature: {}",transaction_signature);Ok((token_account_pubkey, elgamal_keypair, aes_key))}/// Mint tokens to a token account////// Arguments:/// - token: Reference to the token client for interacting with the Token-2022 program/// - token_account: Public key of the token account that will receive the tokens/// - mint_authority: Arc-wrapped keypair that has authority to mint tokens/// - amount: Amount of tokens to mint (in the smallest units)////// Returns:/// - Result<()>: Success or errorasync fn mint_tokens(token: &TokenClient,token_account: &Pubkey,mint_authority: &Arc<Keypair>,amount: u64,) -> Result<()> {println!("Minting {} tokens to account: {}", amount, token_account);// Mint tokens to the specified token accountlet mint_signature = token.mint_to(token_account, // Destination token account&mint_authority.pubkey(), // Mint authorityamount, // Amount to mint&[&mint_authority], // Signers).await?;println!("Token Minting Transaction Signature: {}", mint_signature);Ok(())}/// Deposit tokens to confidential state////// Arguments:/// - token: Reference to the token client for interacting with the Token-2022 program/// - token_account: Public key of the token account with public balance/// - owner: Arc-wrapped keypair that owns the token account/// - amount: Amount of tokens to deposit into confidential pending balance/// - decimals: Number of decimal for the mint////// Returns:/// - Result<()>: Success or errorasync fn deposit_tokens(token: &TokenClient,token_account: &Pubkey,owner: &Arc<Keypair>,amount: u64,decimals: u8,) -> Result<()> {println!("Depositing {} tokens to confidential pending balance...", amount);// Deposit tokens to confidential pending balancelet deposit_signature = token.confidential_transfer_deposit(token_account, // Token account&owner.pubkey(), // Owner of the token accountamount, // Amount to depositdecimals, // Decimal for the mint&[&owner], // Signers).await?;println!("Confidential Transfer Deposit Signature: {}",deposit_signature);Ok(())}/// Apply pending balance to make funds available////// Arguments:/// - token: Reference to the token client for interacting with the Token-2022 program/// - token_account: Public key of the token account/// - owner: Arc-wrapped keypair that owns the token account/// - elgamal_keypair: ElGamal keypair for decrypting confidential amounts/// - aes_key: AES key for decrypting confidential amounts////// Returns:/// - Result<()>: Success or errorasync fn apply_pending_balance(token: &TokenClient,token_account: &Pubkey,owner: &Arc<Keypair>,elgamal_keypair: &ElGamalKeypair,aes_key: &AeKey,) -> Result<()> {println!("Applying pending balance for account: {}", token_account);// Apply pending balance to convert confidential pending balance to confidential available balancelet apply_signature = token.confidential_transfer_apply_pending_balance(token_account, // Token account&owner.pubkey(), // Owner of the token accountNone, // Optional auditor public key (none in this example)elgamal_keypair.secret(), // ElGamal secret key for decryptionaes_key, // AES key for decryption&[&owner], // Signers).await?;println!("Apply Pending Balance Signature: {}", apply_signature);Ok(())}/// Withdraw tokens from confidential state////// Arguments:/// - token: Reference to the token client for interacting with the Token-2022 program/// - token_account: Public key of the token account/// - owner: Arc-wrapped keypair that owns the token account/// - elgamal_keypair: ElGamal keypair for decrypting confidential amounts/// - aes_key: AES key for decrypting confidential amounts/// - amount: Amount of tokens to withdraw from confidential available balance/// - payer: Arc-wrapped keypair that will pay for the transaction fees/// - decimals: Number of decimal for the mint////// Returns:/// - Result<()>: Success or error#[allow(clippy::too_many_arguments)]async fn withdraw_tokens(token: &TokenClient,token_account: &Pubkey,owner: &Arc<Keypair>,elgamal_keypair: &ElGamalKeypair,aes_key: &AeKey,amount: u64,payer: Arc<Keypair>,decimals: u8,) -> Result<()> {println!("Withdrawing {} tokens from confidential available balance to public balance...", amount);// Get the token account data to access the confidential transfer extension statelet token_account_data = token.get_account_info(token_account).await?;// Unpack the ConfidentialTransferAccount extension portion of the token account datalet extension_data = token_account_data.get_extension::<ConfidentialTransferAccount>()?;// Confidential Transfer extension state from token account needed to construct a `Withdraw` instructionlet withdraw_account_info =WithdrawAccountInfo::new(extension_data,);// Create keypairs for the proof context state accounts// These accounts will store the context state from the equality and range proofs required for the withdrawallet equality_proof_context_state_keypair = Keypair::new();let equality_proof_context_state_pubkey = equality_proof_context_state_keypair.pubkey();let range_proof_context_state_keypair = Keypair::new();let range_proof_context_state_pubkey = range_proof_context_state_keypair.pubkey();// Create a withdraw proof data// This generates the zero-knowledge proofs needed for the withdrawallet WithdrawProofData {equality_proof_data,range_proof_data,} = withdraw_account_info.generate_proof_data(amount, elgamal_keypair, aes_key)?;// Generate the equality proof context state account// This creates an account to store the equality proof context stateprintln!("Creating equality proof context state account...");let equality_proof_signature = token.confidential_transfer_create_context_state_account(&equality_proof_context_state_pubkey, // Account to create&payer.pubkey(), // Payer for the account creation&equality_proof_data, // Proof data to verifyfalse, // Not a range proof&[&equality_proof_context_state_keypair], // Signers).await?;println!("Create Equality Proof Context State Account: {}",equality_proof_signature);// Generate the range proof context state account// This creates an account to store the range proof context stateprintln!("Creating range proof context state account...");let range_proof_signature = token.confidential_transfer_create_context_state_account(&range_proof_context_state_pubkey, // Account to create&payer.pubkey(), // Payer for the account creation&range_proof_data, // Proof data to verifytrue, // Is a range proof&[&range_proof_context_state_keypair], // Signers).await?;println!("Create Range Proof Context State Account: {}",range_proof_signature);// Perform the withdrawal// This converts confidential available balance back to public balanceprintln!("Executing withdrawal transaction...");let withdraw_signature = token.confidential_transfer_withdraw(token_account, // Token account&owner.pubkey(), // Owner of the token accountSome(&spl_token_client::token::ProofAccount::ContextAccount(equality_proof_context_state_pubkey, // Equality proof account)),Some(&spl_token_client::token::ProofAccount::ContextAccount(range_proof_context_state_pubkey, // Range proof account)),amount, // Amount to withdrawdecimals, // Decimal for the mintSome(withdraw_account_info), // Data from token account required for withdrawalelgamal_keypair, // ElGamal keypair for decryptionaes_key, // AES key for decryption&[&owner], // Signers).await?;println!("Withdraw Transaction Signature: {}", withdraw_signature);// Close the context state accounts to recover rent// This reclaims the SOL used to rent space for the proof accountsprintln!("Closing proof context state accounts...");let close_equality_signature = token.confidential_transfer_close_context_state_account(&equality_proof_context_state_pubkey, // Account to closetoken_account, // Destination for the rent&payer.pubkey(), // Authority to close the account&[&payer], // Signers).await?;println!("Close Equality Proof Context State Account: {}",close_equality_signature);let close_range_signature = token.confidential_transfer_close_context_state_account(&range_proof_context_state_pubkey, // Account to closetoken_account, // Destination for the rent&payer.pubkey(), // Authority to close the account&[&payer], // Signers).await?;println!("Close Range Proof Context State Account: {}",close_range_signature);Ok(())}/// Transfer tokens from one confidential account to another////// Arguments:/// - token: Reference to the token client for interacting with the Token-2022 program/// - sender_token_account: Public key of the sender's token account/// - sender_owner: Arc-wrapped keypair that owns the sender's token account/// - sender_elgamal_keypair: ElGamal keypair for the sender's account/// - sender_aes_key: AES key for encrypting sender's confidential amounts/// - recipient_token_account: Public key of the recipient's token account/// - recipient_elgamal_pubkey: ElGamal public key of the recipient/// - amount: Amount of tokens to transfer/// - payer: Arc-wrapped keypair that will pay for the transaction fees////// Returns:/// - Result<()>: Success or error#[allow(clippy::too_many_arguments)]async fn transfer_tokens(token: &TokenClient,sender_token_account: &Pubkey,sender_owner: &Arc<Keypair>,sender_elgamal_keypair: &ElGamalKeypair,sender_aes_key: &AeKey,recipient_token_account: &Pubkey,recipient_elgamal_pubkey: &ElGamalPubkey,amount: u64,payer: Arc<Keypair>,) -> Result<()> {println!("Performing confidential transfer of {} tokens...", amount);// Get the token account data to access the confidential transfer extensionlet token_account_data = token.get_account_info(sender_token_account).await?;let extension_data = token_account_data.get_extension::<ConfidentialTransferAccount>()?;// Confidential Transfer extension state from token account needed to construct a `Transfer` instructionlet transfer_account_info =TransferAccountInfo::new(extension_data,);// Generate the proof data for the transfer// This creates the zero-knowledge proofs needed for the transferlet transfer_proof_data = transfer_account_info.generate_split_transfer_proof_data(amount, // Amount to transfersender_elgamal_keypair, // Sender's ElGamal keypairsender_aes_key, // Sender's AES keyrecipient_elgamal_pubkey, // Recipient's ElGamal public keyNone, // Auditor ElGamal public key (none in this example))?;// Create proof context state accounts// These accounts will store the context state from the equality, ciphertext validity, and range proofs required for the transferlet equality_proof_context_state_keypair = Keypair::new();let equality_proof_context_state_pubkey = equality_proof_context_state_keypair.pubkey();let ciphertext_validity_proof_context_state_keypair = Keypair::new();let ciphertext_validity_proof_context_state_pubkey =ciphertext_validity_proof_context_state_keypair.pubkey();let range_proof_context_state_keypair = Keypair::new();let range_proof_context_state_pubkey = range_proof_context_state_keypair.pubkey();// Equality proof - proves that two ciphertexts encrypt the same amountprintln!("Creating equality proof context state account...");let equality_proof_signature = token.confidential_transfer_create_context_state_account(&equality_proof_context_state_pubkey, // Account to create&payer.pubkey(), // Payer for the account creation&transfer_proof_data.equality_proof_data, // Proof data to verifyfalse, // Not a range proof&[&equality_proof_context_state_keypair], // Signers).await?;println!("Create Equality Proof Context State Account: {}",equality_proof_signature);// Ciphertext validity proof - proves that the ciphertext is properly formedprintln!("Creating ciphertext validity proof context state account...");let ciphertext_proof_signature = token.confidential_transfer_create_context_state_account(&ciphertext_validity_proof_context_state_pubkey, // Account to create&payer.pubkey(), // Payer for the account creation&transfer_proof_data.ciphertext_validity_proof_data_with_ciphertext.proof_data, // Proof data to verifyfalse, // Not a range proof&[&ciphertext_validity_proof_context_state_keypair], // Signers).await?;println!("Create Ciphertext Validity Proof Context State Account: {}",ciphertext_proof_signature);// Range proof - proves that the encrypted amount is within a valid range and non-negativeprintln!("Creating range proof context state account...");let range_proof_signature = token.confidential_transfer_create_context_state_account(&range_proof_context_state_pubkey, // Account to create&payer.pubkey(), // Payer for the account creation&transfer_proof_data.range_proof_data, // Proof to verifytrue, // Is a range proof&[&range_proof_context_state_keypair], // Signers).await?;println!("Create Range Proof Context State Account: {}", range_proof_signature);// Execute the confidential transfer// This transfers tokens confidentially from sender token account to recipient token accountprintln!("Executing confidential transfer transaction...");// Create a ProofAccountWithCiphertext for the ciphertext validity proof// This combines the proof account with the ciphertext datalet ciphertext_validity_proof_account_with_ciphertext =spl_token_client::token::ProofAccountWithCiphertext {proof_account: spl_token_client::token::ProofAccount::ContextAccount(ciphertext_validity_proof_context_state_pubkey, // Proof account),ciphertext_lo: transfer_proof_data.ciphertext_validity_proof_data_with_ciphertext.ciphertext_lo, // Low 128 bits of ciphertextciphertext_hi: transfer_proof_data.ciphertext_validity_proof_data_with_ciphertext.ciphertext_hi, // High 128 bits of ciphertext};// Perform the confidential transferlet transfer_signature = token.confidential_transfer_transfer(sender_token_account, // Source token accountrecipient_token_account, // Destination token account&sender_owner.pubkey(), // Owner of the source accountSome(&spl_token_client::token::ProofAccount::ContextAccount(equality_proof_context_state_pubkey, // Equality proof context state account)),Some(&ciphertext_validity_proof_account_with_ciphertext), // Ciphertext validity proofSome(&spl_token_client::token::ProofAccount::ContextAccount(range_proof_context_state_pubkey, // Range proof account)),amount, // Amount to transferNone, // Optional auditor info (none in this case)sender_elgamal_keypair, // Sender's ElGamal keypairsender_aes_key, // Sender's AES keyrecipient_elgamal_pubkey, // Recipient's ElGamal public keyNone, // Optional auditor ElGamal public key&[&sender_owner], // Signers).await?;println!("Confidential Transfer Signature: {}", transfer_signature);// Close the context state accounts to recover rent// This reclaims the SOL used to rent space for the proof accountsprintln!("Closing proof context state accounts...");// Close the equality proof accountlet close_equality_signature = token.confidential_transfer_close_context_state_account(&equality_proof_context_state_pubkey, // Account to closesender_token_account, // Destination for the rent&payer.pubkey(), // Authority to close the account&[&payer], // Signers).await?;println!("Close Equality Proof Context State Account: {}",close_equality_signature);// Close the ciphertext validity proof accountlet close_ciphertext_signature = token.confidential_transfer_close_context_state_account(&ciphertext_validity_proof_context_state_pubkey, // Account to closesender_token_account, // Destination for the rent&payer.pubkey(), // Authority to close the account&[&payer], // Signers).await?;println!("Close Ciphertext Validity Proof Context State Account: {}",close_ciphertext_signature);// Close the range proof accountlet close_range_signature = token.confidential_transfer_close_context_state_account(&range_proof_context_state_pubkey, // Account to closesender_token_account, // Destination for the rent&payer.pubkey(), // Authority to close the account&[&payer], // Signers).await?;println!("Close Range Proof Context State Account: {}",close_range_signature);Ok(())}
Εντολές Εμπιστευτικής Μεταφοράς
Η πλήρης λίστα των εντολών της επέκτασης Εμπιστευτικής Μεταφοράς instructions είναι οι εξής:
Εντολή | Περιγραφή |
---|---|
InitializeMint | Ρυθμίζει τον λογαριασμό mint για εμπιστευτικές μεταφορές. Αυτή η εντολή πρέπει να συμπεριληφθεί στην ίδια συναλλαγή με την εντολή TokenInstruction::InitializeMint . |
UpdateMint | Ενημερώνει τις ρυθμίσεις εμπιστευτικής μεταφοράς για ένα mint. |
ConfigureAccount | Ρυθμίζει έναν λογαριασμό token για εμπιστευτικές μεταφορές. |
ApproveAccount | Εγκρίνει έναν λογαριασμό token για εμπιστευτικές μεταφορές εάν το mint απαιτεί έγκριση για νέους λογαριασμούς token. |
EmptyAccount | Αδειάζει τα εκκρεμή και διαθέσιμα εμπιστευτικά υπόλοιπα για να επιτρέψει το κλείσιμο ενός λογαριασμού token. |
Deposit | Μετατρέπει το δημόσιο υπόλοιπο token σε εκκρεμές εμπιστευτικό υπόλοιπο. |
Withdraw | Μετατρέπει το διαθέσιμο εμπιστευτικό υπόλοιπο πίσω σε δημόσιο υπόλοιπο. |
Transfer | Μεταφέρει token μεταξύ λογαριασμών token εμπιστευτικά. |
ApplyPendingBalance | Μετατρέπει το εκκρεμές υπόλοιπο σε διαθέσιμο υπόλοιπο μετά από καταθέσεις ή μεταφορές. |
EnableConfidentialCredits | Επιτρέπει σε έναν λογαριασμό token να λαμβάνει εμπιστευτικές μεταφορές token. |
DisableConfidentialCredits | Αποκλείει εισερχόμενες εμπιστευτικές μεταφορές ενώ εξακολουθεί να επιτρέπει δημόσιες μεταφορές. |
EnableNonConfidentialCredits | Επιτρέπει σε έναν λογαριασμό token να λαμβάνει δημόσιες μεταφορές token. |
DisableNonConfidentialCredits | Αποκλείει τις κανονικές μεταφορές ώστε ο λογαριασμός να λαμβάνει μόνο εμπιστευτικές μεταφορές. |
TransferWithFee | Μεταφέρει token μεταξύ λογαριασμών token εμπιστευτικά με χρέωση. |
ConfigureAccountWithRegistry | Εναλλακτικός τρόπος διαμόρφωσης λογαριασμών token για εμπιστευτικές μεταφορές χρησιμοποιώντας έναν λογαριασμό ElGamalRegistry αντί για απόδειξη VerifyPubkeyValidity . |
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