# Decentralized Sequencer Set

AltLayer has a dedicated network called the Beacon Layer that serves as the global  sequencer set.  When AltLayer provisions a rollup, nodes from the Beacon layer are selected based on their stake.\
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A user submits a request for a rollup via our dashboard or the SDK and specifies the requirements such as the type of VM, number of sequencers and the minimum stake and the allowed token list.

<figure><img src="https://3112893033-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F8DRtEPgHrIg4b65B1smQ%2Fuploads%2Fe4xv6q38L0xo0evwvYEq%2Fimage.png?alt=media&#x26;token=32d91b92-9406-46d4-8b93-fb9218675175" alt=""><figcaption></figcaption></figure>

The sequencer layer then assigns the nodes for rollup and once all the sequencers are assigned, the rollup becomes operational.

<figure><img src="https://3112893033-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F8DRtEPgHrIg4b65B1smQ%2Fuploads%2FlYVMwisHPZLPIdccUiGE%2Fimage.png?alt=media&#x26;token=d944123b-dc16-4cdc-942a-e2f6a5ca116d" alt=""><figcaption></figcaption></figure>

A common decentralized sequencer set could also be used to ensure cross-chain atomic messaging.