Enum State

src/txrequest.cpp:42–55

The various states a (txhash,peer) pair can be in. * * Note that CANDIDATE is split up into 3 substates (DELAYED, BEST, READY), allowing more efficient implementation. * Also note that the sorting order of ByTxHashView relies on the specific order of values in this enum. * * Expected behaviour is: * - When first announced by a peer, the state is CANDIDATE_DELAYED until reqtime is reached.

 *     COMPLETED.
 */
enum class State : uint8_t {
    /** A CANDIDATE announcement whose reqtime is in the future. */
    CANDIDATE_DELAYED,
    /** A CANDIDATE announcement that's not CANDIDATE_DELAYED or CANDIDATE_BEST. */
    CANDIDATE_READY,
    /** The best CANDIDATE for a given txhash; only if there is no REQUESTED announcement already for that txhash.
     *  The CANDIDATE_BEST is the highest-priority announcement among all CANDIDATE_READY (and _BEST) ones for that
     *  txhash. */
    CANDIDATE_BEST,
    /** A REQUESTED announcement. */
    REQUESTED,
    /** A COMPLETED announcement. */
    COMPLETED,
};

//! Type alias for sequence numbers.
using SequenceNumber = uint64_t;