Istanbul

• Geth upgraded to Mawinor (v1.12.2) release.
• Payout Transaction type to Type 2.
• PoN Builder extra data updated.
• Multibeacon client fork data and fork version.
• Support for Bellatrix, Capella, and Deneb fork version and automatic block-building and marshalling for the right fork version without operational stop.
• Software is backward compatible with old fork versions.
• Big Endian <-> Little Endian conversions and fixes for block structure, baseFeePerGas and hash compute for BLS and ECDSA signing.
• Bug fix for signed beacon block and beacon block insertion into storage on multiple execution payload requests.
• Included additional sanity checks for valid block building
• Improved shared data access for the build and submission concurrent routines.

Monte Carlo

• Update builder extra data

Denver

• Updated multi-beacon client asynchronous publishing for improved error handling and submission tracking.
• Added large bid amount support for bids and bounty bids from the previous 18 ETH constraint.
• Big Integer support for bid storage and block building to support large bid values.
• Improved query summations and averages for Builder Dashboard (metrics).
• Fixed sync mutex locks to safeguard against sporadic race conditions in bid cancellations/failures mid-processing.
• Database bug fixes.
• Updated bundle sorting for maximum payout, with included documentation in code and readMe.
• Adjusted slot start time and cutoffs for async bid processing.
• Optimized beacon and head channel buffers for stalled nodes.
• Updated sample bid scripts and bulletin board subscriptions.

London

• Improved builder architecture for faster block building and improved go routines for slot and bounty submissions, cutting down bidding, building and submission total time by ≈60%.
• New bounty bid submission functionality for slot.
• Builder block verification and sanity checks.
• Builder block publishing from builder software as failsafe for network.
• RPBS improvements; encoding transaction bytes for data compression and signature generation.
• Block bid structure changed to allow ECDSA signing over key values, ensuring proven ownership of RPBS public key, builder public endpoint and bid payload.
• Updated relay API routes.
• Improved builder slot time gatekeeping.
• Updated package dependencies.
• Geth Krogam upgrades towards supporting coming Cancun Fork, remove ethHash across geth and upgrade graphQL schemas, bug fixes.
• New Builder RPC for private order flow and MEV bundle submission directly to builders for block inclusion.
• Updated builder command line flags and startup to allow for builder bundles and unique builder configurations.
• Bid submission to default to the next slot if the target slot is not provided.
• Improved garbage collection for cached data.
• Builder type upgrades.
• Changed builder bid response to show all bids and include all execution timestamps for bid requests, block production through to submission.
• Bug fixes to multiBeacon client.

Paris

• RPBS improvements
• Bug fix for asynchronous beacon data access
• Added context cancellation for running block building once bid accepted and block publish begun
• Additional checks for valid full blocks to cover geth sync delay issues in transaction mempool
• General type changes and imports

Accra

PoN Builder. It enables the following functionalities:

• Mempool and/or local transactions block building.
• Balance check for payout transaction.
• Multi-beacon client for reliability and performance optimization.
• Obscuring transactions from relay and validators in PBS.
• 2 bid system with asynchronous block building for MEV per slot.
• Private order flow, directly to builder's local transaction pool.
• Fast in-memory access and caching of readily usable beacon data for block building.
• Builder metrics and storing block bid and proposal data for local export.
• RPBS enforced bid submissions for zk proof verification by PoN network actors.
• Full geth functionality maintained.