Objective Create a high-performance order executi...

Below is an outline of how you might set up a C++ project capable of placing orders on Deribit’s Test environment (https://test.deribit.com/) using their REST and/or WebSocket APIs. The example covers the basic steps from project structure and dependencies, to authenticating with your provided client_id and client_secret, and finally placing an order.

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1. Prerequisites and Project Structure

1. Compiler
   You’ll need a modern C++ compiler (e.g., GCC 9+, Clang 10+, MSVC 2019+, etc.) that supports C++17 (or later).

2. Build System
   A common choice is CMake. It simplifies dependency management and cross-platform builds.

3. HTTP & JSON Libraries

   • HTTP: You can use a library like cURL or CPR (a C++ wrapper around libcurl).
   • JSON: Popular choices include nlohmann/json or RapidJSON.

4. WebSocket Library (optional but recommended for real-time updates)

   • Boost.Beast
   • uWebSockets
   • Websocket++

Your project structure might look like this:

text
deribit_example/
├── CMakeLists.txt
├── src/
│   ├── main.cpp
│   ├── DeribitClient.cpp
│   └── DeribitClient.h
└── external/
    ├── cpr/       (optional if you clone cpr)
    └── nlohmann/  (optional if you clone nlohmann/json)

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2. Setting Up Deribit Test Credentials

1. Go to Deribit Test and create a new account.
2. In your profile, generate an API key with the needed permissions. You will get:
   • Client ID: 6gdbOtkw
   • Client Secret: dpxFzncIHAEP7OFYhq3PYvtnwlcZpC5IOUtTxm7ipzo (example from your post)
3. Keep these credentials in a secure place. You’ll use them when requesting an access token and placing orders.

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3. Authenticating with Deribit

Deribit’s REST API supports the standard OAuth 2.0 “client_credentials” grant type. You’ll send a POST to their /api/v2/public/auth endpoint. The test environment base URL is https://test.deribit.com.

A typical request to obtain a token would look like:

text
POST https://test.deribit.com/api/v2/public/auth
Content-Type: application/json

{
  "grant_type": "client_credentials",
  "client_id": "YOUR_CLIENT_ID",
  "client_secret": "YOUR_CLIENT_SECRET"
}

Note: Deribit also allows passing these parameters as query arguments (?client_id=...&client_secret=...&grant_type=...). In this example, we’ll assume you send JSON in the request body, which is usually done with a proper HTTP library.

Example using CPR (C++ Requests)

Below is a minimal code snippet to fetch and store your OAuth token. You can adapt it if you choose different libraries.

cpp
// DeribitClient.cpp

#include "DeribitClient.h"
#include <cpr/cpr.h>
#include <nlohmann/json.hpp>
#include <iostream>

DeribitClient::DeribitClient(const std::string& clientId, const std::string& clientSecret)
    : clientId_(clientId), clientSecret_(clientSecret)
{
    // Attempt to authenticate on construction
    authenticate();
}

void DeribitClient::authenticate() {
    // Deribit test environment auth URL
    const std::string url = "https://test.deribit.com/api/v2/public/auth";

    // Using cpr for the POST request
    cpr::Response r = cpr::Post(
        cpr::Url{url},
        cpr::Payload{
            {"client_id",     clientId_},
            {"client_secret", clientSecret_},
            {"grant_type",    "client_credentials"}
        }
    );

    if (r.status_code != 200) {
        std::cerr << "Auth request failed with status " 
                  << r.status_code << ": " << r.text << std::endl;
        return;
    }

    auto jsonData = nlohmann::json::parse(r.text);

    // Store the access_token
    if (jsonData.contains("result") && jsonData["result"].contains("access_token")) {
        accessToken_ = jsonData["result"]["access_token"].get<std::string>();
        std::cout << "Authenticated successfully. Access Token: " << accessToken_ << std::endl;
    } else {
        std::cerr << "Invalid auth response: " << r.text << std::endl;
    }
}

And in the header file:

cpp
// DeribitClient.h

#pragma once
#include <string>

class DeribitClient {
public:
    DeribitClient(const std::string& clientId, const std::string& clientSecret);
    
    // High-level order function
    void placeOrder(const std::string& instrumentName,
                    const std::string& side,
                    double amount,
                    double price,
                    const std::string& orderType);

private:
    // Authentication
    void authenticate();

    std::string clientId_;
    std::string clientSecret_;
    std::string accessToken_;
};

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4. Placing an Order

According to Deribit’s API docs (Test environment uses the same endpoints, just on https://test.deribit.com), the place order endpoint is:

text
POST /api/v2/private/buy
or
POST /api/v2/private/sell

Depending on whether you want to go long (buy) or short (sell). The request can include parameters like instrument_name, amount, type (like "limit", "market"), price, etc.

A Sample Function to Place a Limit Order

Below is an example placeOrder method. We’ll choose the buy endpoint if side == "BUY", otherwise the sell endpoint.

cpp
#include <cpr/cpr.h>
#include <nlohmann/json.hpp>
#include <iostream>
#include "DeribitClient.h"

void DeribitClient::placeOrder(const std::string& instrumentName,
                               const std::string& side,
                               double amount,
                               double price,
                               const std::string& orderType)
{
    if (accessToken_.empty()) {
        std::cerr << "No access token. Authenticate first." << std::endl;
        return;
    }
    
    // pick endpoint
    std::string endpoint = (side == "BUY") ? "buy" : "sell";
    // Deribit test environment
    std::string url = "https://test.deribit.com/api/v2/private/" + endpoint;

    // Prepare the payload
    // e.g. 'instrument_name=BTC-PERPETUAL&amount=10&type=limit&price=50000'
    cpr::Payload payload = {
        {"instrument_name", instrumentName},
        {"amount",          std::to_string(amount)},
        {"type",            orderType}  // e.g. "limit", "market"
    };

    // If limit order, add the price
    if (orderType == "limit") {
        payload.AddPair({"price", std::to_string(price)});
    }

    // Send the request
    cpr::Response r = cpr::Post(
        cpr::Url{url},
        payload,
        cpr::Header{{"Authorization", "Bearer " + accessToken_}}
    );

    if (r.status_code == 200) {
        auto jsonData = nlohmann::json::parse(r.text);
        std::cout << "Order response: " << jsonData.dump(2) << std::endl;
    } else {
        std::cerr << "Order failed with status " << r.status_code << ": " 
                  << r.text << std::endl;
    }
}

Then, in your main.cpp, you can do:

cpp
#include <iostream>
#include "DeribitClient.h"

int main() {
    // Replace with your actual keys
    std::string clientId = "6gdbOtkw";
    std::string clientSecret = "dpxFzncIHAEP7OFYhq3PYvtnwlcZpC5IOUtTxm7ipzo";

    // Create client
    DeribitClient client(clientId, clientSecret);

    // Place a limit order, e.g. buy 10 contracts at price = 30000
    client.placeOrder("BTC-PERPETUAL", "BUY", 10, 30000, "limit");

    return 0;
}

Compile and run. If successful, you should see an order response JSON object.

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5. Using CMake (Minimal Example)

Below is a simple CMakeLists.txt that fetches CPR, uses nlohmann/json, and builds an executable:

cmake
cmake_minimum_required(VERSION 3.14)
project(DeribitExample CXX)

set(CMAKE_CXX_STANDARD 17)

# Optionally fetch dependencies via CPM or FetchContent
include(FetchContent)

# Fetch cpr
FetchContent_Declare(
  cpr
  GIT_REPOSITORY https://github.com/libcpr/cpr.git
  GIT_TAG        1.10.4  # or the latest release
)
FetchContent_MakeAvailable(cpr)

# nlohmann/json (header-only)
FetchContent_Declare(
  json
  GIT_REPOSITORY https://github.com/nlohmann/json.git
  GIT_TAG        v3.11.2 # or the latest release
)
FetchContent_MakeAvailable(json)

# Add your sources
add_executable(deribit_example
    src/main.cpp
    src/DeribitClient.cpp
)

# Link libraries
target_link_libraries(deribit_example
    PRIVATE
        cpr::cpr
        nlohmann_json::nlohmann_json
)

To build:

bash
cd deribit_example
mkdir build && cd build
cmake ..
make
./deribit_example

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6. Real-Time Market Data (WebSocket) - Optional

For high-performance trading, you will likely want to consume real-time order books and trade data via WebSockets. Deribit’s WebSocket endpoint for the test environment is:

wss://test.deribit.com/ws/api/v2

You’d authenticate similarly by sending an auth call over the WebSocket. Then you subscribe to channels such as book.BTC-PERPETUAL.raw, trades.BTC-PERPETUAL.raw, etc. See Deribit’s docs on WebSocket API usage.

Using a C++ WebSocket library like Boost.Beast might look like this in pseudocode:

cpp
// Pseudocode for connecting to Deribit via WebSocket
#include <boost/asio.hpp>
#include <boost/beast/websocket.hpp>

// ...

boost::asio::io_context ioc;
boost::asio::ip::tcp::resolver resolver(ioc);
auto const results = resolver.resolve("test.deribit.com", "443");

boost::beast::websocket::stream<boost::asio::ip::tcp::socket> ws(ioc);

// SSL/TLS details omitted for brevity if you need wss
// Connect etc...

// Perform WebSocket handshake
ws.handshake("test.deribit.com", "/ws/api/v2");

// Now you can write JSON to the WebSocket
// e.g. subscribe to the BTC-PERPETUAL orderbook
std::string subscribeMessage = R"({
    "jsonrpc": "2.0",
    "id": 42,
    "method": "public/subscribe",
    "params": {
        "channels": ["book.BTC-PERPETUAL.raw"]
    }
})";
ws.write(boost::asio::buffer(subscribeMessage));

// Then read messages in a loop, parse JSON, process updates...

Once you’ve established the real-time stream, your trading system can react quickly to changing conditions and place/cancel orders with minimal latency.

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7. Tips for High-Performance

1. Keep the TCP/WebSocket connection alive – Avoid reconnecting on every request.
2. Minimize JSON conversions – Use efficient serialization and parse only necessary fields.
3. Multi-threading – Use separate threads for network I/O and order logic.
4. Handling Errors – Implement robust error checking, especially when your connection to Deribit fails or your token expires.

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Summary of Steps

1. Create a new Deribit Test account and generate API credentials.
2. Initialize a C++ project (optionally with CMake).
3. Add dependencies (cURL/CPR for REST, nlohmann/json for JSON).
4. Implement an authenticate call to Deribit’s /api/v2/public/auth endpoint, saving the access_token.
5. Implement order management (place, cancel, etc.) using /api/v2/private/buy or /api/v2/private/sell.
6. (Optional) Implement WebSocket subscriptions for real-time data.
7. Compile and run, testing with a small buy/sell to confirm everything is working as expected on the test environment.

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Final Notes

• Always test thoroughly in the Test environment before trading with real funds.
• Watch for updates to Deribit’s official API docs, as endpoints or parameters may change over time.
• For production usage, ensure you handle rate limits, reconnection logic, and token refresh when your OAuth token expires.

This should give you a solid starting point for building a C++-based, high-performance trading system on Deribit Test. Good luck, and happy coding!