Reacting to upgrades
This is a guide for sequencer operators to understand how to react to protocol upgrades. To learn about how upgrades work, read the concept section.
Sequencers signal for governance upgrades
To signal for governance upgrades, sequencers must set their GOVERNANCE_PROPOSER_PAYLOAD on their sequencer node to the address of a payload. This will register their signal with the GovernanceProposer contract.
the payload is a contract on L1 that specifies the address of the new rollup contract to be upgraded to. The payloads to be voted on during alpha-testnet will be communicated to sequencers on the forum and on community channels like discord.
This signalling phase will pass once N sequencers in a round of M L2 blocks have signalled for the same payload. Once the quorum is met, anyone can call the executeProposal(roundNumber) function on the Governance Proposer contract to advance the upgrade into the next stage.
The N and M are public variables on the Governance Proposer contract, and can be read by anyone (i.e. using a cast call). To get the round number, you can call the computeRound(slotNumber) on the Governance Proposer contract.