Big Commitments

v1.4.0-alpha.0 -- Big Commitments -- is the an alpha release for the coming Deneb upgrade.

This includes a handful of breaking changes in preparation for the next wave of testnets. Thank you for the many contributors on this front.

The attnets revamp (#3312) has been released in a backwards compatible fashion (no peer downscoring yet). Thanks @AgeManning for carrying this over the finish line!

PR showing full diff can be found here: #3380

Phase 0

• Attnet revamp: Subnet backbone structure based on beacon nodes #3312
• [non-substantive] Add networking configuration to config files #3375

Bellatrix

• [non-substantive] Change process_execution_payload function signature and Execution Engine API wrapper due to #3359.
  • Note that the test format has been changed accordingly.

Capella

• [non-substantive] Remove is_merge_transition_block check since Capella #3232
• [non-substantive] Remove is_execution_enabled condition since Capella #3350

Deneb

• Update the endianness of the polynomial commitments to be big endian #3354
• Use engine_newPayloadV3 to pass versioned_hashes to EL for validation #3359
• Update block's blob_kzg_commitments size limit to MAX_BLOB_COMMITMENTS_PER_BLOCK #3338, #3384
• Add GetPayloadResponse dataclass for get_payload API #3341
• Explicitly specify the number of sidecar subnets #3346 #3373
• Add group of invalid G1 points in KZG tests #3344
• Deneb refactoring and new tests #3340

Experimental

EIP6914

• EIP6914 - Reuse indexes with full sweep #3307

EIP4788

• Add EIP-4788 feature #3319

Testing, repo, etc

• Multiprocessing testgen runner #3347, #3383, #3386
• Fix CircleCI Python version #3372
• Enable EIP-6110 in pytest #3309
• Fix process_inactivity_updates test cases #3348
• Minor typos, formatting, grammar, etc #3369 #3328 #3334 #3337 #3308 #3382
• Fix docs site deployment #3387