Tracking: Zebra Beta Release

[mpguerra]

Let's use this issue to outline the required steps needed for us to tag a beta release for Zebra:

Documentation

• Update the README goals and scope for our first Beta release #2857

Nice to have

• Improve Zebra documentation for beta release #2870

Security

In critical path order, earliest tickets first.
(And in dependency order, tickets with no dependencies on the left.)

Open Connections

• Security: Track the number of open connections in Zebra #2903
  • Security: Track the number of open inbound and outbound connections separately #2904
    • Security: Limit the number of outbound peer connections when dialing new peers #1850
      • Security: Limit the number of inbound peer connections in the listener task #1851
      • Limit the initial crawler demand for outbound peers, based on seed peer connections #2902 (not security, not a beta blocker)

Connection Rate

• Security: Rate-limit inbound peer connection attempts #2901
• Security: Rate-limit initial seed peer connections #2326

Initial Connections

• Security: Limit the number of initial connection attempts to seed peers #2900
  • Add unused seed peers to the AddressBook #2931 (not security, not a beta blocker, but still important)

Mempool

• Randomly evict mempool transactions based on their eviction weights #2780
  • Limit the size and age of the ZIP-401 rejected transaction ID list #2759
    • Remove MEMPOOL_SIZE and just rely on the ZIP-401 cost limit #2958
      • Update mempool tests after ZIP-401 changes #2959
      • Remove impl Default for Storage (not a beta blocker)
      • Turn ZIP-401 low fee penalty literals into constants (not a beta blocker)
• Limit transaction size in the mempool #484

Performance

• Ignore duplicate block AlreadyInChain errors in the syncer #2883

Nice to have

• Some DNS seeders and block explorers don't show Zebra nodes #1904

Needs Triage

These tickets need discussion or triage before they are implemented:

Logging

• Downgrade some logs from info level
• Reduce log level of mempool crawl errors #2655

Needs a DevOps Person

• Test that zcashd and Zebra can sync from Zebra #1400
• Provide docker images as part of the beta releases as release artifact

[oxarbitrage]

Suggestion: Nice to have: #1400 ?

[conradoplg]

I've created #2870, not sure where it fits (nice to have?)

[mpguerra]

Beta release is tagged, closing this tracking issue.

We should still keep an eye on the following issues:

• Some DNS seeders and block explorers don't show Zebra nodes #1904
• Reduce log level of mempool crawl errors #2655
• Test that zcashd and Zebra can sync from Zebra #1400