C++ SDK

Introduction

This C++ SDK provides tools to interact with the Phantasma blockchain. It includes modules for cryptography, blockchain data structures, network communication, and adapters for different underlying SDKs.

The SDK is designed for developers who want to integrate Phantasma into their C++ applications, offering both low-level JSON-RPC message builders and high-level API calls.

Key Features:

• Complete cryptographic primitives (Ed25519, hashing, encryption)

• Transaction building and signing

• JSON-RPC request/response handling

• Adapters for CURL, cpprestsdk, sodium, and more

• Cross-platform support (unavailable at the moment)

Architecture Overview

The SDK is organized into the following main modules:

• PhantasmaAPI: High-level API for interacting with the blockchain

• PhantasmaJsonAPI: Low-level JSON message builders and parsers

• Cryptography: Key pairs, hashing, signatures, and encryption

• Blockchain: Transaction and block structures

• Adapters: Implementations for networking, JSON parsing, and cryptography

Getting Started

The SDK supports multiple backends. Include an adapter BEFORE PhantasmaAPI.h:

• Adapters/PhantasmaAPI_rapidjson.h + Adapters/PhantasmaAPI_curl.h (RapidJSON + libcurl)

• or Adapters/PhantasmaAPI_cpprest.h (Microsoft CppRestSDK)

// JSON + HTTP backends first
#include "Adapters/PhantasmaAPI_rapidjson.h"
#include "Adapters/PhantasmaAPI_curl.h"

// Then the generated API
#include "PhantasmaAPI.h"

using namespace phantasma;
using namespace phantasma::rpc;

int main() {
    HttpClient http("https://your-node-url"); // provided by adapter
    PhantasmaAPI api(http);

    PhantasmaError err{};
    Account me = api.GetAccount("P2K...address", &err);
    if (err.code != 0) {
        // handle err.message
    }
}

If you use the CppRestSDK adapter, include only Adapters/PhantasmaAPI_cpprest.h before PhantasmaAPI.h.

Build system notes:

• Requires a C++17 compiler

• Link with curl when using the CURL adapter

• Add RapidJSON headers when using the RapidJSON adapter

• Add CppRestSDK when using the cpprest adapter

Low-level API High-level API Data models Cryptography