BlockScorer.h

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#pragma once
#include "catapult/model/BlockChainConfiguration.h"
#include "catapult/types.h"
#include <boost/multiprecision/cpp_int.hpp>
#include <functional>
 
namespace catapult { namespace model { struct Block; } }
 
namespace catapult { namespace chain {
 
    using BlockTarget = boost::multiprecision::uint256_t;
 
    uint64_t CalculateHit(const GenerationHash& generationHash);
 
    uint64_t CalculateScore(const model::Block& parentBlock, const model::Block& currentBlock);
 
    BlockTarget CalculateTarget(
            const utils::TimeSpan& timeSpan,
            Difficulty difficulty,
            Importance signerImportance,
            const model::BlockChainConfiguration& config);
 
    BlockTarget CalculateTarget(
            const model::Block& parentBlock,
            const model::Block& currentBlock,
            Importance signerImportance,
            const model::BlockChainConfiguration& config);
 
    struct BlockHitContext {
    public:
        BlockHitContext() : ElapsedTime(utils::TimeSpan::FromSeconds(0))
        {}
 
    public:
        catapult::GenerationHash GenerationHash;
 
        utils::TimeSpan ElapsedTime;
 
        Key Signer;
 
        catapult::Difficulty Difficulty;
 
        catapult::Height Height;
    };
 
    class BlockHitPredicate {
    private:
        using ImportanceLookupFunc = std::function<Importance (const Key&, Height)>;
 
    public:
        BlockHitPredicate(const model::BlockChainConfiguration& config, const ImportanceLookupFunc& importanceLookup);
 
    public:
        bool operator()(const model::Block& parentBlock, const model::Block& block, const GenerationHash& generationHash) const;
 
        bool operator()(const BlockHitContext& context) const;
 
    private:
        model::BlockChainConfiguration m_config;
        ImportanceLookupFunc m_importanceLookup;
    };
}}