The Merge

[ajsutton]

Implement THE MERGE.

Instructions

For instructions on how to run interop see:

• [Merge] Merge transition interop with Geth #4438
• [Merge] Make Teku working with Geth EE #4431
• [Merge] Make Teku Merge capable of running a testnet with a stub Execution Engine  #4428
• [Merge] Make Teku interop standalone node running with stubbed Execution Engine #4424

TODO

TODO list for interop:

• [Merge] Enable CI on merge branch #4350 Enable CI on merge branch
• [Merge] Rebase merge implementation onto Altair #4351 Rebase merge implementation onto Altair fork
• [Merge] Implement SszUnion structure #4361 Implement SszUnion
• ([Merge] Adjust ExecutionPayload.transaction type with new Transaction Union structure  #4362, ?) Update to the latest merge core spec
• [Merge] Fix reference tests #4368 Sort out reference test failures
• [Merge] implement TERMINAL_TOTAL_DIFFICULTY parameter #4345
• [Merge] Update to interop Engine API #4346 Update to interop Engine API
• [Merge] implement is_valid_gas_limit #4417
• [Merge] Ref tests update to v1.1.0-beta.5 #4423
• [Merge] Make Teku interop standalone node running with stubbed Execution Engine #4424
• [Merge] Make Teku Merge capable of running a testnet with a stub Execution Engine  #4428
• [Merge] Migrate PowBlock to ssz #4429
• [Merge] Make Teku working with Geth EE #4431
• [Merge] Merge transition interop with Geth #4438
• [Merge] Spec v1.1.1 adoption #4445
• [Merge] Draft implementation of Optimistic sync with Execution Layer #4458
• Implement the right Optimistic sync (see [Merge] Draft implementation of Optimistic sync with Execution Layer #4458)
• [Merge] Support Async payload execution #4348 Support Async payload execution
• [Merge] Sync process #4349 Sync process
• [Merge] Publish docker image of merge-interop branch #4357 Publish docker image of merge branch