AQEAB: Allow consensus operation with BLS

This is a sub-milestone of %(2024Q4) Attestation Quorum Expansion to All Bakers

People

@ACoquereau, @4dam

Motivation

Reducing the attestations' footprint in blocks, lowering storage and network consumption.

Plan

• Delegates can sign consensus operation with BLS digital signature (BLS) cryptographic scheme (Tz4 address)

Work breakdown

• Protocol feature

  • Allow Tz4 for delegates
    • !15311 (merged) - Alpha: add allow_tz4_delegates_enable feature flag
    • !15302 (merged) - Alpha allow tz4 delegates
  • Require a BLS POP proof for:
    • Register TZ4 delegate Not needed since a Proof of possession is already needed a reveal time of the pk.
    • !15670 (merged) - alpha: add a proof of possession in update consensus key operation for BLS addresses

• Validation process

  • Benchmark
    • Tz4 signing
    • Tz4 signature check
    • BLS Proof production
    • BLS Proof check