signer.hpp

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#pragma once
 
#include "kalshi/error.hpp"
 
#include <cstdint>
#include <memory>
#include <string>
#include <string_view>
 
namespace kalshi {
 
struct AuthHeaders {
    std::string access_key; 
    std::string signature;  
    std::string timestamp;  
};
 
enum class KeyType : std::uint8_t {
    Rsa,    
    Ed25519 
};
 
class Signer {
public:
    [[nodiscard]] static Result<Signer> from_pem(std::string_view api_key_id,
                                                 std::string_view pem_key);
 
    [[nodiscard]] static Result<Signer> from_pem_file(std::string_view api_key_id,
                                                      std::string_view file_path);
 
    [[nodiscard]] Result<AuthHeaders> sign(std::string_view method, std::string_view path) const;
 
    [[nodiscard]] Result<AuthHeaders> sign_with_timestamp(std::string_view method,
                                                          std::string_view path,
                                                          std::int64_t timestamp_ms) const;
 
    [[nodiscard]] std::string_view api_key_id() const noexcept;
    [[nodiscard]] KeyType key_type() const noexcept;
 
private:
    struct Impl;
    std::shared_ptr<const Impl> impl_;
 
    explicit Signer(std::shared_ptr<const Impl> impl) noexcept;
};
 
} // namespace kalshi