Method GetCheapHash

src/hash.h:143–146

* Returns the first 64 bits from the resulting hash. */

     * Returns the first 64 bits from the resulting hash.
     */
    inline uint64_t GetCheapHash() {
        uint256 result = GetHash();
        return ReadLE64(result.begin());
    }

    template<typename T>
    CHashWriter& operator<<(const T& obj) {