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	* Valid signature cache, to avoid doing expensive ECDSA signature checking			* Valid signature cache, to avoid doing expensive ECDSA signature checking
	* twice for every transaction (once when accepted into memory pool, and			* twice for every transaction (once when accepted into memory pool, and
	* again when accepted into the block chain)			* again when accepted into the block chain)
	*/			*/
	class CSignatureCache {			class CSignatureCache {
	private:			private:
	//! Entries are SHA256(nonce \|\| signature hash \|\| public key \|\| signature):			//! Entries are SHA256(nonce \|\| signature hash \|\| public key \|\| signature):
	uint256 nonce;			uint256 nonce;
	typedef CuckooCache::cache<uint256, SignatureCacheHasher> map_type;			typedef CuckooCache::cache<CuckooCache::KeyOnly<uint256>,
				SignatureCacheHasher>
				map_type;
	map_type setValid;			map_type setValid;
	boost::shared_mutex cs_sigcache;			boost::shared_mutex cs_sigcache;

	public:			public:
	CSignatureCache() { GetRandBytes(nonce.begin(), 32); }			CSignatureCache() { GetRandBytes(nonce.begin(), 32); }

	void ComputeEntry(uint256 &entry, const uint256 &hash,			void ComputeEntry(uint256 &entry, const uint256 &hash,
	const std::vector<uint8_t> &vchSig,			const std::vector<uint8_t> &vchSig,
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