TechFlow News: On May 26, according to an official announcement from Optimism, the OP mainnet has implemented its first-ever adjustment to transaction ordering rules. For several years prior, the sequencer relied solely on a “highest-priority gas fee first” mechanism; it now introduces a new staking-based priority ordering option.
This four-week experiment (ending June 23) was approved earlier this month by the Optimism governance body and is opt-in for users. To participate, users must stake no fewer than 100,000 OP tokens in the PolicyEngineStaking contract.
The experiment proceeds in two phases: Phase One (Week 1) employs a FIFO (first-in, first-out) ordering scheme—stake amounts exceeding the minimum threshold do not affect priority. Phase Two (Weeks 2–4) transitions to a priority gas multiplier mechanism weighted by staking duration—the longer the staking period, the higher the priority.
For users not participating in the experiment, transaction ordering rules remain unchanged, and the PGA mechanism continues operating as usual.
