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	/** Precompute sighash midstate to avoid quadratic hashing */			/** Precompute sighash midstate to avoid quadratic hashing */
	struct PrecomputedTransactionData {			struct PrecomputedTransactionData {
	uint256 hashPrevouts, hashSequence, hashOutputs;			uint256 hashPrevouts, hashSequence, hashOutputs;

	PrecomputedTransactionData()			PrecomputedTransactionData()
	: hashPrevouts(), hashSequence(), hashOutputs() {}			: hashPrevouts(), hashSequence(), hashOutputs() {}

	PrecomputedTransactionData(const PrecomputedTransactionData &txdata)			PrecomputedTransactionData(const PrecomputedTransactionData &txdata) =
	: hashPrevouts(txdata.hashPrevouts), hashSequence(txdata.hashSequence),			default;
	hashOutputs(txdata.hashOutputs) {}

	template <class T> explicit PrecomputedTransactionData(const T &tx);			template <class T> explicit PrecomputedTransactionData(const T &tx);
	};			};

	#endif // BITCOIN_PRIMITIVES_TRANSACTION_H			#endif // BITCOIN_PRIMITIVES_TRANSACTION_H