signature.hpp

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#pragma once
#include <fc/static_variant.hpp>
#include <fc/crypto/elliptic.hpp>
#include <fc/crypto/elliptic_r1.hpp>
#include <fc/crypto/elliptic_webauthn.hpp>
#include <fc/crypto/elliptic_em.hpp> 
#include <fc/reflect/reflect.hpp>
#include <fc/reflect/variant.hpp>
 
namespace fc { namespace crypto {
   namespace config {
      constexpr const char* signature_base_prefix = "SIG";
      constexpr const char* signature_prefix[] = {
         "K1",
         "R1",
         "WA",
         "EM"
      };
   };
 
   class signature
   {
      public:
         using storage_type = std::variant<ecc::signature_shim, r1::signature_shim, webauthn::signature, em::signature_shim>;
 
         signature() = default;
         signature( signature&& ) = default;
         signature( const signature& ) = default;
         signature& operator= (const signature& ) = default;
 
         // serialize to/from string
         explicit signature(const string& base58str);
         std::string to_string(const fc::yield_function_t& yield = fc::yield_function_t()) const;
 
         size_t which() const;
 
         size_t variable_size() const;
 
      private:
         storage_type _storage;
 
         signature( storage_type&& other_storage )
         :_storage(std::forward<storage_type>(other_storage))
         {}
 
         friend bool operator == ( const signature& p1, const signature& p2);
         friend bool operator != ( const signature& p1, const signature& p2);
         friend bool operator < ( const signature& p1, const signature& p2);
         friend std::size_t hash_value(const signature& b); //not cryptographic; for containers
         friend struct reflector<signature>;
         friend class private_key;
         friend class public_key;
   }; // public_key
 
   size_t hash_value(const signature& b);
 
} }  // fc::crypto
 
namespace fc {
   void to_variant(const crypto::signature& var, variant& vo, const fc::yield_function_t& yield = fc::yield_function_t());
 
   void from_variant(const variant& var, crypto::signature& vo);
} // namespace fc
 
namespace std {
   template <> struct hash<fc::crypto::signature> {
      std::size_t operator()(const fc::crypto::signature& k) const {
         return fc::crypto::hash_value(k);
      }
   };
} // std
 
FC_REFLECT(fc::crypto::signature, (_storage) )