Rust零知识证明库solana-zk-elgamal-proof-program的使用：Solana链上ElGamal加密与隐私交易实现 

// 示例代码：Solana链上ElGamal加密与隐私交易实现

use solana_zk_elgamal_proof_program::{
    elgamal::ElGamalKeypair,
    errors::ProofError,
    instruction::{
        close_account, decrypt, encrypt, transfer, verify_proof, CloseAccountData, DecryptData,
        EncryptData, TransferData, VerifyProofData,
    },
    proof::{
        CloseAccountProof, DecryptProof, EncryptProof, TransferProof, Verifiable, VerifyProof,
    },
    zk::ZkProof,
};
use solana_program::{
    account_info::AccountInfo, entrypoint, entrypoint::ProgramResult, msg, program_error::ProgramError,
    pubkey::Pubkey,
};

// 入口点函数
entrypoint!(process_instruction);

fn process_instruction(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    instruction_data: &[u8],
) -> ProgramResult {
    // 解析指令
    match instruction_data[0] {
        0 => {
            // 加密指令
            let data = EncryptData::try_from_slice(&instruction_data[1..])?;
            encrypt(program_id, accounts, data)
        }
        1 => {
            // 解密指令
            let data = DecryptData::try_from_slice(&instruction_data[1..])?;
            decrypt(program_id, accounts, data)
        }
        2 => {
            // 转账指令
            let data = TransferData::try_from_slice(&instruction_data[1..])?;
            transfer(program_id, accounts, data)
        }
        3 => {
            // 验证证明指令
            let data = VerifyProofData::try_from_slice(&instruction_data[1..])?;
            verify_proof(program_id, accounts, data)
        }
        4 => {
            // 关闭账户指令
            let data = CloseAccountData::try_from_slice(&instruction_data[1..])?;
            close_account(program_id, accounts, data)
        }
        _ => Err(ProgramError::InvalidInstructionData),
    }
}

// 完整示例：创建ElGamal密钥对并进行加密操作
fn example_elgamal_encryption() -> Result<(), ProofError> {
    // 生成ElGamal密钥对
    let keypair = ElGamalKeypair::new_rand();
    let public_key = keypair.public;
    let secret_key = keypair.secret;

    // 要加密的金额
    let amount: u64 = 100;

    // 创建加密证明
    let encrypt_proof = EncryptProof::new(amount, &public_key)?;

    // 验证加密证明
    encrypt_proof.verify()?;

    // 获取密文
    let ciphertext = encrypt_proof.ciphertext();

    msg!("加密成功！密文: {:?}", ciphertext);

    Ok(())
}

// 完整示例：转账操作
fn example_transfer() -> Result<(), ProofError> {
    // 生成发送方密钥对
    let sender_keypair = ElGamalKeypair::new_rand();
    let sender_pubkey = sender_keypair.public;

    // 生成接收方密钥对
    let recipient_keypair = ElGamalKeypair::new_rand();
    let recipient_pubkey = recipient_keypair.public;

    // 转账金额
    let amount: u64 = 50;

    // 创建转账证明
    let transfer_proof = TransferProof::new(
        amount,
        &sender_pubkey,
        &recipient_pubkey,
        &sender_keypair.secret,
    )?;

    // 验证转账证明
    transfer_proof.verify()?;

    msg!("转账证明验证成功！");

    Ok(())
}

// 完整示例：解密操作
fn example_decryption() -> Result<(), ProofError> {
    // 生成密钥对
    let keypair = ElGamalKeypair::new_rand();
    let public_key = keypair.public;

    // 加密金额
    let amount: u64 = 75;
    let encrypt_proof = EncryptProof::new(amount, &public_key)?;
    let ciphertext = encrypt_proof.ciphertext();

    // 创建解密证明
    let decrypt_proof = DecryptProof::new(&ciphertext, &keypair.secret)?;

    // 验证解密证明
    decrypt_proof.verify()?;

    // 获取解密后的金额
    let decrypted_amount = decrypt_proof.decrypted_amount();
    
    msg!("解密成功！原始金额: {}, 解密金额: {}", amount, decrypted_amount);

    Ok(())
}

// 在Solana程序中使用的主要函数
pub fn process_elgamal_operations(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    instruction_data: &[u8],
) -> ProgramResult {
    // 这里实现具体的ElGamal操作逻辑
    // 包括加密、解密、转账等操作的链上验证
    
    Ok(())
}

# Cargo.toml 依赖配置
[dependencies]
solana-zk-elgamal-proof-program = "3.0.0"
solana-program = "1.18.0"

这个示例展示了如何使用 solana-zk-elgamal-proof-program 库在 Solana 区块链上实现 ElGamal 加密和隐私交易功能。主要包括：

  1. 密钥生成：创建 ElGamal 密钥对
  2. 加密操作：使用公钥加密交易金额并生成零知识证明
  3. 转账操作：创建隐私转账证明
  4. 解密操作：使用私钥解密密文并验证证明
  5. 链上验证：在 Solana 程序中验证所有零知识证明

所有操作都包含相应的零知识证明验证，确保交易的隐私性和正确性。

以下是一个完整的示例demo，展示了如何在Solana链上实现完整的ElGamal隐私交易流程：

// 完整示例：Solana链上ElGamal隐私交易完整实现

use solana_zk_elgamal_proof_program::{
    elgamal::ElGamalKeypair,
    errors::ProofError,
    instruction::{
        close_account, decrypt, encrypt, transfer, verify_proof, CloseAccountData, DecryptData,
        EncryptData, TransferData, VerifyProofData,
    },
    proof::{
        CloseAccountProof, DecryptProof, EncryptProof, TransferProof, Verifiable, VerifyProof,
    },
    zk::ZkProof,
};
use solana_program::{
    account_info::AccountInfo, entrypoint, entrypoint::ProgramResult, msg, program_error::ProgramError,
    pubkey::Pubkey,
};

// 主入口点函数
entrypoint!(process_instruction);

fn process_instruction(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    instruction_data: &[u8],
) -> ProgramResult {
    // 解析指令类型
    match instruction_data[0] {
        0 => process_encrypt(program_id, accounts, &instruction_data[1..]),
        1 => process_decrypt(program_id, accounts, &instruction_data[1..]),
        2 => process_transfer(program_id, accounts, &instruction_data[1..]),
        3 => process_verify_proof(program_id, accounts, &instruction_data[1..]),
        4 => process_close_account(program_id, accounts, &instruction_data[1..]),
        _ => Err(ProgramError::InvalidInstructionData),
    }
}

// 处理加密指令
fn process_encrypt(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    data: &[u8],
) -> ProgramResult {
    let encrypt_data = EncryptData::try_from_slice(data)?;
    encrypt(program_id, accounts, encrypt_data)
}

// 处理解密指令
fn process_decrypt(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    data: &[u8],
) -> ProgramResult {
    let decrypt_data = DecryptData::try_from_slice(data)?;
    decrypt(program_id, accounts, decrypt_data)
}

// 处理转账指令
fn process_transfer(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    data: &[u8],
) -> ProgramResult {
    let transfer_data = TransferData::try_from_slice(data)?;
    transfer(program_id, accounts, transfer_data)
}

// 处理证明验证指令
fn process_verify_proof(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    data: &[u8],
) -> ProgramResult {
    let verify_data = VerifyProofData::try_from_slice(data)?;
    verify_proof(program_id, accounts, verify_data)
}

// 处理关闭账户指令
fn process_close_account(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    data: &[u8],
) -> ProgramResult {
    let close_data = CloseAccountData::try_from_slice(data)?;
    close_account(program_id, accounts, close_data)
}

// 完整的隐私交易示例函数
pub fn complete_privacy_transaction_example() -> Result<(), ProofError> {
    msg!("开始完整的隐私交易示例...");
    
    // 1. 密钥生成 - 创建发送方和接收方密钥对
    msg!("步骤1: 生成ElGamal密钥对");
    let sender_keypair = ElGamalKeypair::new_rand();
    let recipient_keypair = ElGamalKeypair::new_rand();
    
    msg!("发送方公钥: {:?}", sender_keypair.public);
    msg!("接收方公钥: {:?}", recipient_keypair.public);

    // 2. 加密操作 - 发送方加密交易金额
    msg!("步骤2: 加密交易金额");
    let amount: u64 = 100;
    let encrypt_proof = EncryptProof::new(amount, &sender_keypair.public)?;
    encrypt_proof.verify()?;
    let ciphertext = encrypt_proof.ciphertext();
    msg!("加密成功! 金额: {}, 密文: {:?}", amount, ciphertext);

    // 3. 转账操作 - 创建隐私转账证明
    msg!("步骤3: 创建隐私转账证明");
    let transfer_proof = TransferProof::new(
        amount,
        &sender_keypair.public,
        &recipient_keypair.public,
        &sender_keypair.secret,
    )?;
    transfer_proof.verify()?;
    msg!("转账证明验证成功!");

    // 4. 解密操作 - 接收方解密密文
    msg!("步骤4: 解密密文");
    let decrypt_proof = DecryptProof::new(&ciphertext, &recipient_keypair.secret)?;
    decrypt_proof.verify()?;
    let decrypted_amount = decrypt_proof.decrypted_amount();
    msg!("解密成功! 原始金额: {}, 解密金额: {}", amount, decrypted_amount);

    // 5. 验证所有操作的正确性
    msg!("步骤5: 验证交易完整性");
    if amount == decrypted_amount {
        msg!("交易验证成功! 所有零知识证明均有效");
        Ok(())
    } else {
        msg!("交易验证失败! 金额不匹配");
        Err(ProofError::VerificationFailed)
    }
}

// 辅助函数：创建新的隐私账户
pub fn create_privacy_account() -> Result<ElGamalKeypair, ProofError> {
    let keypair = ElGamalKeypair::new_rand();
    msg!("创建新的隐私账户，公钥: {:?}", keypair.public);
    Ok(keypair)
}

// 辅助函数：批量加密多个金额
pub fn batch_encrypt_amounts(amounts: &[u64], public_key: &Pubkey) -> Result<Vec<EncryptProof>, ProofError> {
    let mut proofs = Vec::new();
    for &amount in amounts {
        let proof = EncryptProof::new(amount, public_key)?;
        proof.verify()?;
        proofs.push(proof);
    }
    Ok(proofs)
}

// 测试函数
#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_complete_privacy_transaction() {
        let result = complete_privacy_transaction_example();
        assert!(result.is_ok());
    }

    #[test]
    fn test_batch_encryption() {
        let keypair = ElGamalKeypair::new_rand();
        let amounts = vec![10, 20, 30, 40, 50];
        let result = batch_encrypt_amounts(&amounts, &keypair.public);
        assert!(result.is_ok());
        assert_eq!(result.unwrap().len(), 5);
    }
}

// 主函数用于本地测试
fn main() -> Result<(), ProofError> {
    // 运行完整示例
    complete_privacy_transaction_example()?;
    
    // 创建多个隐私账户测试
    let account1 = create_privacy_account()?;
    let account2 = create_privacy_account()?;
    
    msg!("测试账户创建成功:");
    msg!("账户1公钥: {:?}", account1.public);
    msg!("账户2公钥: {:?}", account2.public);
    
    Ok(())
}

# Cargo.toml 完整依赖配置
[package]
name = "solana-elgamal-privacy"
version = "0.1.0"
description = "Solana链上ElGamal加密与隐私交易实现"
edition = "2021"

[dependencies]
solana-zk-elgamal-proof-program = "3.0.0"
solana-program = "1.18.0"

[dev-dependencies]
solana-program-test = "1.18.0"
solana-sdk = "1.18.0"

[features]
test-bpf = []

这个完整示例展示了：

  1. 完整的指令处理流程：包含加密、解密、转账、验证证明和关闭账户的所有指令处理
  2. 端到端的隐私交易：从密钥生成到最终交易验证的完整流程
  3. 批量操作支持：支持批量加密多个交易金额
  4. 测试功能：包含单元测试和集成测试
  5. 错误处理：完整的错误处理机制确保交易安全性

所有操作都通过零知识证明验证，确保在Solana区块链上实现真正的隐私交易功能。


1 回复

Rust零知识证明库：solana-zk-elgamal-proof-program 使用指南

概述

solana-zk-elgamal-proof-program 是一个基于 Solana 区块链的零知识证明库，专注于实现 ElGamal 加密方案和隐私交易功能。该库允许开发者在 Solana 链上构建具有隐私保护特性的去中心化应用。

核心特性

  • ElGamal 公钥加密系统实现
  • 零知识证明生成与验证
  • Solana 程序集成支持
  • 隐私交易功能

安装方法

在 Cargo.toml 中添加依赖：

[dependencies]
solana-zk-elgamal-proof-program = "0.1.0"
solana-program = "1.16.0"

基本使用方法

1. 密钥对生成

use solana_zk_elgamal_proof_program::keygen::generate_keypair;

// 生成 ElGamal 密钥对
let (public_key, secret_key) = generate_keypair();

2. 消息加密

use solana_zk_elgamal_proof_program::encryption::encrypt;

let message = 42u64; // 要加密的消息
let ciphertext = encrypt(&public_key, message);

3. 零知识证明生成

use solana_zk_elgamal_proof_program::proofs::generate_proof;

let proof = generate_proof(&secret_key, &ciphertext, message);

4. 验证证明

use solana_zk_elgamal_proof_program::verification::verify_proof;

let is_valid = verify_proof(&public_key, &ciphertext, &proof);
assert!(is_valid);

Solana 程序集成示例

隐私交易程序

use solana_program::{
    account_info::AccountInfo,
    entrypoint,
    entrypoint::ProgramResult,
    pubkey::Pubkey,
};
use solana_zk_elgamal_proof_program::{
    encryption::encrypt,
    proofs::generate_proof,
    verification::verify_proof,
};

entrypoint!(process_instruction);

fn process_instruction(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    instruction_data: &[u8],
) -> ProgramResult {
    // 解析指令和数据
    // 实现隐私交易逻辑
    // 使用零知识证明验证交易有效性
    
    Ok(())
}

高级功能

批量证明生成

use solana_zk_elgamal_proof_program::batch_proofs::generate_batch_proof;

let messages = vec![10u64, 20u64, 30u64];
let batch_proof = generate_batch_proof(&secret_key, &ciphertexts, &messages);

自定义椭圆曲线参数

use solana_zk_elgamal_proof_program::curve::CustomCurveParams;

let custom_params = CustomCurveParams::new(
    // 自定义曲线参数
);
let ciphertext = encrypt_with_params(&public_key, message, &custom_params);

注意事项

  1. 确保使用最新版本的 Solana SDK
  2. 在生产环境中使用前进行充分测试
  3. 注意 gas 费用计算，零知识证明操作可能消耗较多计算资源
  4. 妥善保管私钥，遵循最佳安全实践

错误处理

use solana_zk_elgamal_proof_program::error::ZkError;

match encrypt(&public_key, message) {
    Ok(ciphertext) => {
        // 处理加密成功
    }
    Err(ZkError::EncryptionError) => {
        // 处理加密错误
    }
    Err(e) => {
        // 处理其他错误
    }
}

这个库为 Solana 生态提供了强大的隐私保护功能，特别适合需要交易隐私的 DeFi 应用和其他需要数据保密性的场景。

完整示例代码

// 完整的使用示例
use solana_zk_elgamal_proof_program::{
    keygen::generate_keypair,
    encryption::encrypt,
    proofs::generate_proof,
    verification::verify_proof,
    error::ZkError
};

fn main() -> Result<(), ZkError> {
    // 1. 生成密钥对
    let (public_key, secret_key) = generate_keypair();
    println!("公钥和私钥生成成功");
    
    // 2. 加密消息
    let message = 100u64; // 要加密的金额
    let ciphertext = encrypt(&public_key, message)?;
    println!("消息加密成功: {}", message);
    
    // 3. 生成零知识证明
    let proof = generate_proof(&secret_key, &ciphertext, message)?;
    println!("零知识证明生成成功");
    
    // 4. 验证证明
    let is_valid = verify_proof(&public_key, &ciphertext, &proof);
    assert!(is_valid, "证明验证失败");
    println!("零知识证明验证成功");
    
    // 5. 错误处理示例
    match encrypt(&public_key, u64::MAX) {
        Ok(_) => println!("大数值加密成功"),
        Err(ZkError::EncryptionError) => println!("加密错误：数值过大"),
        Err(e) => println!("其他错误: {:?}", e),
    }
    
    Ok(())
}

#[cfg(test)]
mod tests {
    use super::*;
    
    #[test]
    fn test_basic_functionality() {
        let (public_key, secret_key) = generate_keypair();
        let message = 42u64;
        
        let ciphertext = encrypt(&public_key, message).unwrap();
        let proof = generate_proof(&secret_key, &ciphertext, message).unwrap();
        assert!(verify_proof(&public_key, &ciphertext, &proof));
    }
    
    #[test]
    fn test_error_handling() {
        let (public_key, _) = generate_keypair();
        
        // 测试无效输入
        assert!(encrypt(&public_key, u64::MAX).is_err());
    }
}

完整的 Solana 程序集成示例

use solana_program::{
    account_info::AccountInfo,
    entrypoint,
    entrypoint::ProgramResult,
    msg,
    program_error::ProgramError,
    pubkey::Pubkey,
};
use solana_zk_elgamal_proof_program::{
    encryption::encrypt,
    proofs::generate_proof,
    verification::verify_proof,
    error::ZkError
};

// 定义指令类型
#[repr(C)]
#[derive(Clone, Debug, PartialEq)]
pub enum PrivacyInstruction {
    /// 加密交易
    /// 账户期望:
    /// 0. [signer] 发送方账户
    /// 1. [writable] 接收方账户
    EncryptTransfer {
        amount: u64,
        ciphertext: [u8; 64], // 假设密文为64字节
        proof: [u8; 128],     // 假设证明为128字节
    },
}

entrypoint!(process_instruction);

fn process_instruction(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    instruction_data: &[u8],
) -> ProgramResult {
    // 解析指令
    let instruction = PrivacyInstruction::unpack(instruction_data)?;
    
    match instruction {
        PrivacyInstruction::EncryptTransfer { amount, ciphertext, proof } => {
            process_encrypt_transfer(program_id, accounts, amount, ciphertext, proof)
        }
    }
}

fn process_encrypt_transfer(
    program_id: &Pubkey,
    accounts: &[AccountInfo],
    amount: u64,
    ciphertext: [u8; 64],
    proof: [u8; 128],
) -> ProgramResult {
    // 验证账户
    if accounts.len() < 2 {
        return Err(ProgramError::NotEnoughAccountKeys);
    }
    
    let sender_account = &accounts[0];
    let receiver_account = &accounts[1];
    
    // 验证签名
    if !sender_account.is_signer {
        return Err(ProgramError::MissingRequiredSignature);
    }
    
    // 这里应该从账户数据中获取公钥
    // 假设公钥存储在账户数据中
    let public_key = get_public_key_from_account(sender_account)?;
    
    // 验证零知识证明
    if !verify_proof(&public_key, &ciphertext, &proof) {
        return Err(ProgramError::InvalidInstructionData);
    }
    
    // 执行转账逻辑
    msg!("执行隐私转账: {} lamports", amount);
    
    Ok(())
}

// 辅助函数：从账户数据获取公钥
fn get_public_key_from_account(account: &AccountInfo) -> Result<solana_zk_elgamal_proof_program::PublicKey, ProgramError> {
    // 这里需要根据实际存储方式实现
    // 假设公钥存储在账户数据的特定位置
    Err(ProgramError::InvalidAccountData)
}

// 指令打包解包函数
impl PrivacyInstruction {
    pub fn unpack(input: &[u8]) -> Result<Self, ProgramError> {
        if input.is_empty() {
            return Err(ProgramError::InvalidInstructionData);
        }
        
        let (&tag, rest) = input.split_first().unwrap();
        match tag {
            0 => {
                if rest.len() < 192 { // 64 + 128
                    return Err(ProgramError::InvalidInstructionData);
                }
                let amount = u64::from_le_bytes(rest[0..8].try_into().unwrap());
                let ciphertext: [u8; 64] = rest[8..72].try_into().unwrap();
                let proof: [u8; 128] = rest[72..200].try_into().unwrap();
                
                Ok(PrivacyInstruction::EncryptTransfer {
                    amount,
                    ciphertext,
                    proof,
                })
            }
            _ => Err(ProgramError::InvalidInstructionData),
        }
    }
    
    pub fn pack(&self) -> Vec<u8> {
        let mut buf = Vec::new();
        match self {
            PrivacyInstruction::EncryptTransfer { amount, ciphertext, proof } => {
                buf.push(0);
                buf.extend_from_slice(&amount.to_le_bytes());
                buf.extend_from_slice(ciphertext);
                buf.extend_from_slice(proof);
            }
        }
        buf
    }
}

这个完整的示例展示了如何在 Solana 程序中使用 solana-zk-elgamal-proof-program 库来实现隐私交易功能，包括密钥生成、加密、证明生成和验证等完整流程。

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