Fix inconsistent online representatives list from RPC #2874
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This minor change increases rep crawler and online reps consistency in small ledgers with low activity - mostly for the beta network.
…a RPC The list of online reps is only used externally by RPC, but it has been noted that it is often inconsistent. This is due to clearing the list upon sampling online weight. With this change, a backup is made on each sample, and RPC will now report the list of both currently sampling reps, and the ones previously sampled.
SergiySW
approved these changes
Sep 9, 2020
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This was reported in #2533 and @Srayman figured the problem lied in clearing the list of representatives on every sample.
Now, on sampling, a backup of the online reps is made, and the RPC will report both the backup reps and the ones currently sampling (so it can span a period between 5 and 10 minutes, depending on when it is triggered).
Online weight sampling is untouched.
Also fixes a bug affecting mostly the beta network which has a small ledger and low activity. When the hash chosen by the rep crawler query was recently confirmed, it would lead to the confirm_ack response being dismissed as a vote replay.