C++ data_buffer::read_bytes方法代码示例

bool checkpoint_sync::decode(data_buffer & buffer)
{
    auto len = buffer.read_var_int();
    
    if (len > 0)
    {
        m_message.resize(len);
        
        buffer.read_bytes(
            reinterpret_cast<char *>(&m_message[0]), m_message.size()
        );
    }
    
    len = buffer.read_var_int();
    
    if (len > 0)
    {
        m_signature.resize(len);
        
        buffer.read_bytes(
            reinterpret_cast<char *>(&m_signature[0]), m_signature.size()
        );
    }
    
    return true;
}

void key_wallet::decode(data_buffer & buffer)
{
    /**
     * Read the version.
     */
    buffer.read_uint32();
    
    /**
     * Read the private key length.
     */
    auto len = buffer.read_var_int();

    if (len > 0)
    {
        /**
         * Read the private key.
         */
        m_key_private.reserve(len);
        
        buffer.read_bytes(
            reinterpret_cast<char *> (&m_key_private[0]), m_key_private.size()
        );
    }
    
    /**
     * Read the time created.
     */
    m_time_created = buffer.read_int64();
    
    /**
     * Read the time expires.
     */
    m_time_expires = buffer.read_int64();
    
    /**
     * Read the comment length.
     */
    len = buffer.read_var_int();
    
    if (len > 0)
    {
        /**
         * Read the comment.
         */
        m_comment.reserve(len);
        
        buffer.read_bytes(
            const_cast<char *> (m_comment.data()), m_comment.size()
        );
    }
}

bool alert::decode(data_buffer & buffer)
{
    auto len = buffer.read_var_int();
    
    if (len > 0)
    {
        m_message.resize(len);
        
        buffer.read_bytes(
            reinterpret_cast<char *>(&m_message[0]), m_message.size()
        );
    }
    
    len = buffer.read_var_int();
    
    if (len > 0)
    {
        m_signature.resize(len);
        
        buffer.read_bytes(
            reinterpret_cast<char *>(&m_signature[0]), m_signature.size()
        );
    }
    
    /**
     * If we have a message, decode it.
     */
    if (m_message.size() > 0)
    {
        /**
         * Allocate the message buffer.
         */
        data_buffer buffer_message;
        
        /**
         * Write the message into the buffer.
         */
        buffer_message.write_bytes(
            reinterpret_cast<const char *>(&m_message[0]), m_message.size()
        );
        
        /**
         * Decode the message.
         */
        alert_unsigned::decode(buffer_message);
    }
    
    return true;
}

void transaction_out::decode(data_buffer & buffer)
{
    /**
     * Decode the value.
     */
    m_value = buffer.read_int64();
    
    /**
     * Read the var_int.
     */
    auto len = buffer.read_var_int();
    
    if (len > 0)
    {
        /**
         * Read the script.
         */
        auto bytes = buffer.read_bytes(len);
        
        /**
         * Insert the script.
         */
        m_script_public_key.insert(
            m_script_public_key.begin(), bytes.begin(), bytes.end()
        );
    }
}

bool incentive_vote::decode(data_buffer & buffer)
{
    /**
     * Read the version.
     */
    m_version = buffer.read_uint32();
    
    assert(m_version == current_version);
    
    /**
     * Read the block height.
     */
    m_block_height = buffer.read_uint32();
    
    /**
     * Read the block hash.
     */
    m_hash_block = buffer.read_sha256();
    
    /**
     * Read the nonce hash.
     */
    m_hash_nonce = buffer.read_sha256();
    
    /**
     * Read the number of address length.
     */
    auto address_len = buffer.read_var_int();
    
    /**
     * Allocate the address.
     */
    m_address.resize(address_len);
    
    /**
     * Read the address.
     */
    buffer.read_bytes(const_cast<char *>(m_address.data()), m_address.size());
    
    /**
     * Decode the public key.
     */
    m_public_key.decode(buffer);

    /**
     * Check the hash nonce is correct.
     */
    if (
        m_hash_nonce != (m_hash_block ^ sha256::from_digest(&hash::sha256d(
        reinterpret_cast<const std::uint8_t *> (
        m_address.data()), m_address.size())[0]) ^ m_public_key.get_hash())
        )
    {
        log_error("Incentive vote decode failed, invalid nonce.");
        
        return false;
    }

    return verify(buffer);
}

bool merkle_tree_partial::decode(data_buffer & buffer)
{
    m_total_transactions = buffer.read_uint32();
    
    auto count = buffer.read_var_int();
    
    for (auto i = 0; i < count; i++)
    {
        m_hashes.push_back(buffer.read_sha256());
    }
    
    std::vector<std::uint8_t> bytes;
    
    auto len = buffer.read_var_int();
    
    if (len > 0)
    {
        bytes.resize(len);
        
        buffer.read_bytes(reinterpret_cast<char *>(&bytes[0]), len);
    }
    
    m_flags.resize(bytes.size() * 8);
    
    for (auto i = 0; i < m_flags.size(); i++)
    {
        m_flags[i] = (bytes[i / 8] & (1 << (i % 8))) != 0;
    }
    
    is_invalid_ = false;
    
    return true;
}

bool hd_configuration::decode(data_buffer & buffer)
{
    m_version = buffer.read_uint32();
    m_index = buffer.read_uint32();
    buffer.read_bytes(
        reinterpret_cast<char *> (&m_id_key_master.digest()[0]),
        ripemd160::digest_length
    );

    return true;
}

bool incentive_vote::verify(data_buffer & buffer)
{
    auto ret = false;
    
    /**
     * Calculate the hash of the nonce hash.
     */
    auto digest = hash::sha256d(
        m_hash_nonce.digest(), sha256::digest_length
    );

    /**
     * Hash the encoded message buffer.
     */
    sha256 hash_value = sha256::from_digest(&digest[0]);
    
    /**
     * Read the signature.
     */
    auto signature_len = buffer.read_var_int();

    if (signature_len > 0)
    {
        m_signature.resize(signature_len);
        
        buffer.read_bytes(
            reinterpret_cast<char *>(&m_signature[0]), m_signature.size()
        );

        if (
            incentive::instance().verify(m_public_key, hash_value,
            m_signature) == true
            )
        {
            ret = true;
            
            log_debug(
                "Incentive vote verified value (" <<
                hash_value.to_string().substr(0, 8) << ")."
            );
        }
        else
        {
            log_error(
                "Incentive vote failed to verify value (" <<
                hash_value.to_string().substr(0, 8) << ")."
            );
        }
    }
    
    return ret;
}

bool zerotime_lock::decode(data_buffer & buffer)
{
    /**
     * Decode the version.
     */
    m_version = buffer.read_uint32();

    assert(m_version == current_version);

    /**
     * Decode the transaction.
     */
    m_transaction.decode(buffer);

    /**
     * Decode the transaction hash.
     */
    buffer.read_bytes(
        reinterpret_cast<char *> (m_hash_tx.digest()), sha256::digest_length
    );

    assert(m_transaction.get_hash() == m_hash_tx);

    /**
     * Decode the expiration.
     */
    m_expiration = buffer.read_uint64();

    /**
     * Enforce the expiration.
     */
    if (
        m_expiration < time::instance().get_adjusted() + interval_min_expire ||
        m_expiration > time::instance().get_adjusted() + interval_max_expire
    )
    {
        m_expiration = time::instance().get_adjusted() + interval_min_expire;
    }

    /**
     * No signature is required because:
     * 1. The receiver may want to lock a non-zerotime transaction.
     * 2. It causes no harm to let other's lock the transaction.
     * 3. It conserves bandwidth and processing power.
     */

    return m_transaction.get_hash() == m_hash_tx;
}

bool incentive_answer::verify(data_buffer & buffer)
{
    auto ret = false;
    
    /**
     * Hash the encoded message buffer.
     */
    sha256 hash_value = m_public_key.get_hash();
    
    /**
     * Read the signature.
     */
    auto signature_len = buffer.read_var_int();

    if (signature_len > 0)
    {
        m_signature.resize(signature_len);
        
        buffer.read_bytes(
            reinterpret_cast<char *>(&m_signature[0]), m_signature.size()
        );
        
        if (
            incentive::instance().verify(
            m_public_key, hash_value, m_signature) == true
            )
        {
            ret = true;
            
            log_debug(
                "Incentive answer verified value (" <<
                hash_value.to_string().substr(0, 8) << ")."
            );
        }
        else
        {
            log_error(
                "Incentive answer failed to verify value (" <<
                hash_value.to_string().substr(0, 8) << ")."
            );
        }
    }
    
    return ret;
}

bool db_wallet::read_key_value(
    wallet & w, data_buffer & buffer_key,
    data_buffer & buffer_value, std::int32_t & file_version,
    std::vector<sha256> & wallet_upgrade, bool & is_encrypted,
    bool & any_unordered, std::string & type, std::string & err
    )
 {
    type.clear();
    type.resize(buffer_key.read_var_int());
    
    buffer_key.read_bytes(
        const_cast<char *> (type.data()), type.size()
    );

    if (type == "name")
    {
        std::string addr;
        
        auto len = buffer_key.read_var_int();
        
        if (len > 0)
        {
            addr.resize(len);
            
            buffer_key.read_bytes(
                const_cast<char *> (addr.data()), addr.size()
            );
        }
        
        std::string value;
        
        len = buffer_value.read_var_int();
        
        if (len > 0)
        {
            value.resize(len);
            
            buffer_value.read_bytes(
                const_cast<char *> (value.data()), value.size()
            );
        }
        
        w.address_book()[address(addr).get()] = value;
    }
    else if (type == "tx")
    {
        sha256 hash = buffer_key.read_sha256();

        auto & wtx = w.transactions()[hash];
        
        wtx.decode(buffer_value);

        if (wtx.get_hash() == hash)
        {
            wtx.bind_wallet(w);
        }
        else
        {
            w.transactions().erase(hash);
            
            return false;
        }

        /**
         * Undo serialize changes in 31600.
         */
        if (
            31404 <= wtx.time_received_is_tx_time() &&
            wtx.time_received_is_tx_time() <= 31703
            )
        {
            if (buffer_value.remaining() > 0)
            {
                char tmp;
                char unused;
                
                buffer_value.read_bytes(&tmp, sizeof(tmp));
                buffer_value.read_bytes(&unused, sizeof(unused));
                
                wtx.from_account().clear();
                wtx.from_account().resize(buffer_value.read_var_int());
                
                buffer_value.read_bytes(
                    const_cast<char *> (wtx.from_account().data()),
                    wtx.from_account().size()
                );
                
                wtx.set_time_received_is_tx_time(tmp);
            }
            else
            {
                wtx.set_time_received_is_tx_time(0);
            }
            
            wallet_upgrade.push_back(hash);
        }

        if (wtx.order_position() == -1)
        {
            any_unordered = true;
//.........这里部分代码省略.........

bool incentive_collaterals::decode(data_buffer & buffer)
{
    /**
     * Decode the version.
     */
    m_version = buffer.read_uint32();
    
    assert(m_version == current_version);
    
    /**
     * Read the number of collateral entries.
     */
    auto count = buffer.read_var_int();
    
    /**
     * Read each collateral entry.
     */
    for (auto i = 0; i < count; i++)
    {
        address_manager::recent_endpoint_t collateral;
        
        /**
         * Read the address.
         */
        collateral.addr = buffer.read_network_address(false, true);
        
        auto len = buffer.read_var_int();
        
        collateral.wallet_address.resize(len);
        
        /**
         * Read the wallet address.
         */
        buffer.read_bytes(
            const_cast<char *> (collateral.wallet_address.data()),
            collateral.wallet_address.size()
        );
        
        /**
         * Read the public key.
         */
        collateral.public_key.decode(buffer);
        
        /**
         * Read the transaction_in.
         */
        collateral.tx_in.decode(buffer);
        
        /**
         * Read the time.
         */
        collateral.time = buffer.read_uint64();
        
        /**
         * Read the protocol version.
         */
        collateral.protocol_version = buffer.read_uint32();
        
        /**
         * Read the protocol version user agent length.
         */
        len = buffer.read_var_int();
        
        collateral.protocol_version_user_agent.resize(len);
        
        /**
         * Read the protocol version user agent.
         */
        buffer.read_bytes(
            const_cast<char *> (collateral.protocol_version_user_agent.data()),
            collateral.protocol_version_user_agent.size()
        );
        
        /**
         * Read the protocol version services.
         */
        collateral.protocol_version_services = buffer.read_uint64();
        
        /**
         * Read the protocol version start height.
         */
        collateral.protocol_version_start_height = buffer.read_int32();
        
        m_collaterals.insert(collateral);
    }
    
    return true;
}

void transaction_wallet::decode(data_buffer & buffer)
{
    /**
     * Initialize
     */
    initialize(0);
    
    auto is_spent = false;

    /**
     * Decode the base class.
     */
    transaction_merkle::decode(buffer);
    
    auto len = buffer.read_var_int();
    
    for (auto i = 0; i < len; i++)
    {
        transaction_merkle tx_merkle;
        
        tx_merkle.decode(buffer);
        
        m_previous_transactions.push_back(tx_merkle);
    }
    
    auto len_values = buffer.read_var_int();
    
    for (auto i = 0; i < len_values; i++)
    {
        std::string first(buffer.read_var_int(), 0);
        
        buffer.read_bytes(const_cast<char *> (first.data()), first.size());
        
        std::string second(buffer.read_var_int(), 0);
        
        buffer.read_bytes(const_cast<char *> (second.data()), second.size());
        
        m_values[first] = second;
    }
    
    m_order_form.resize(buffer.read_var_int());
    
    for (auto i = 0; i < m_order_form.size(); i++)
    {
        std::string first(buffer.read_var_int(), 0);
        
        buffer.read_bytes(const_cast<char *> (first.data()), first.size());
        
        std::string second(buffer.read_var_int(), 0);
        
        buffer.read_bytes(const_cast<char *> (second.data()), second.size());
        
        m_order_form[i] = std::make_pair(first, second);
    }

    m_time_received_is_tx_time = buffer.read_uint32();

    m_time_received = buffer.read_uint32();
    
    m_is_from_me = buffer.read_uint8();
    
    is_spent = buffer.read_uint8();
    
    m_from_account = m_values["fromaccount"];

    if (m_values.count("spent") > 0)
    {
        for (auto & i : m_values["spent"])
        {
            m_spent.push_back(i != '0');
        }
    }
    else
    {
        m_spent.assign(transaction_out().size(), is_spent);
    }
    
    /**
     * If we are an (SPV) client set the block height from the value.
     */
    if (globals::instance().is_client_spv() == true)
    {
        if (m_values.count("spv_block_height") > 0)
        {
            auto block_height = std::stoi(m_values["spv_block_height"]);
            
            set_spv_block_height(block_height);
        }
    }
    
    /**
     * Read the order position.
     */
    wallet::read_order_position(m_order_position, m_values);

    m_time_smart =
        m_values.count("timesmart") ?
        boost::lexical_cast<std::uint32_t> (m_values["timesmart"]) : 0
    ;

//.........这里部分代码省略.........