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Rollup configurations are a consensus construct used to configure an Optimism Consensus client. When an OP Stack chain is deployed into production or consensus nodes are configured to sync the chain, certain consensus parameters can be configured. These parameters are defined in the OP Stack specs. Consensus parameters are consumed by OP Stack software through the RollupConfig type defined in the kona-genesis crate.

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RollupConfig Type

The RollupConfig type is defined in kona-genesis. Rollup configs can be loaded for a given chain id using kona-registry. The ROLLUP_CONFIG mapping in the kona-registry provides a mapping from chain ids to rollup config.