statistics.h
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statistics.h
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	// Copyright (c) 2023 The Bitcoin developers
	// Distributed under the MIT software license, see the accompanying
	// file COPYING or http://www.opensource.org/licenses/mit-license.php.

	#ifndef BITCOIN_AVALANCHE_STATISTICS_H
	#define BITCOIN_AVALANCHE_STATISTICS_H

	#include <chrono>

	/** Refresh period for the avalanche statistics computation */
	static constexpr std::chrono::minutes AVALANCHE_STATISTICS_REFRESH_PERIOD{10};
	/** Time constant for the avalanche statistics computation */
	static constexpr std::chrono::minutes AVALANCHE_STATISTICS_TIME_CONSTANT{10};
	/**
	* Pre-computed decay factor for the avalanche statistics computation.
	* There is currently no constexpr variant of std::exp, so use a const.
	*/
	static const double AVALANCHE_STATISTICS_DECAY_FACTOR =
	1. - std::exp(-1. * AVALANCHE_STATISTICS_REFRESH_PERIOD.count() /
	AVALANCHE_STATISTICS_TIME_CONSTANT.count());

	#endif // BITCOIN_AVALANCHE_STATISTICS_H