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# System prepended metadata

title: Decentralised Sequencing Manifesto

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# Decentralised Sequencing Manifesto

## Secure without UX Sacrifices

Current rollups with centralised sequencers offer superior UX compared to both L1 and rollups with decentralised sequencers.

Firstly, due to their constant monopoly, they offer a quick preconfirmation of inclusion and execution. This is now the standard that the users expect from their transactions.

Secondly, the rollups with currently centralised sequencers fulfil the rollup-centric future promise offering orders of magnitude cheaper transactions compared to L1.

A goal for decentralised sequencing design would be to enable a rollup protocol to offer equal if not better UX compared to centralised sequencing in terms of preconfirmation time, guarantees and cost of transaction.

## Economically Sustainable

Current rollups with centralised sequencer generates revenue from the transactions fees in their rollups.

A goal for a decentralised sequencing design would be to enable the participating actors, including the rollup protocol itself, to generate profit.

## Composability over Walled Gardens

Rollups with centralised sequencing cannot offer synchronous composability with other rollups unless they opt into a single centralised shared sequencer. This means that multiple rollups will have a single trusted centralised sequencer.

A goal for a decentralised sequencing design would be to enable composability with other rollups without the requirement to trust a single centralised sequencing layer.

## Inheriting Ethereum Liveness over External Liveness Guarantees

Rollups with centralised sequencing rely on a single centralised sequencer to be live in order for the system to be operational.

A goal for decentralised sequencing design would be to derive its liveness guarantees from the Ethereum L1 liveness guarantees.

## Protocol over Trust based Censorship Resistance

Rollups with centralised sequencing requires the users to trust them that they will not censor them. This makes the centralised sequencer a single point of failure and subjects the rollup, among other things to geopolitical risks.

A goal for a decentralised sequencing design would be to remove the need of trust towards a single party and ensure a sizable and diverse set of sequencers, so that within an acceptable timeframe a censored transactions will reach an honest sequencer that will be willing to sequence this transaction.