Psychrolutes marcidus

v1.4.0-beta.6 -- Psychrolutes marcidus -- is a beta release for upcoming Deneb devnets.

This release adds new field g1_monomial to the trusted setup file. It can be found at the upstream. The latest sha256
checksum: f8e44a31ebf0a6d0734dcb301b0716e2c77f3ae18ed0cab0870fbcc2ca55616f

PR showing full diff can be found here: #3578

Phase 0

Fork choice

• Confirmation rule prerequisite - fork choice filter change #3431

Networking

• Align gossip validation for aggregates with single attestations #3552
• Use fork choice to determine finalized_checkpoint in gossip validation #3543

Light client

• Refactoring #3569, #3571
• Rename _INDEX generalized index constants to _GINDEX #3537, #3563
• Gossip additional LightClientFinalityUpdate on new supermajority #3549
• Use types for representing LC Merkle branches #3563

SSZ

• byte type and canonical JSON mapping #3506

Whisk

• Add WHISK fork only tests #3442

EIP-7594 (WIP - still in its early stages)

• EIP-7594: Add cryptography specs for sampling #3557, #3583

Testing, repo, etc

• Pyspec refactoring #3562, #3567
• Pyspec dockerization #3477, #3573
• Consider fork transitions when using get_sync_aggregate #3572
• Add guard when fill_prev_epoch is True in epoch 0 by #3570
• Add transition test case of non-empty pre-state historical_roots #3585