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docs: add checkpoint loading error handling description #443

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2 changes: 1 addition & 1 deletion book/src/storage.md
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Expand Up @@ -8,7 +8,7 @@ By default, Grandine keeps the non-finalized part of the chain in the memory usi

Grandine stores finalized part of the chain in the disk using an embedded key-value database `libmdbx`. Disk storage is passive and mainly used for storing/loading checkpoints, and serving historical data via API. Historical blocks and corresponding intermediate states are stored on the disk. It's possible to set the length of the intermediate states period. A higher value for this interval means lower disk usage and slower API responses for historical data.

Grandine allows starting the Beacon Node from an earlier stored checkpoint by using `--state-slot` option. In this case, Grandine will try to find and load from the disk the closest stored checkpoint before the specified `--state-slot`.
Grandine allows starting the Beacon Node from an earlier stored checkpoint by using `--state-slot` option. In this case, Grandine will try to find and load from the disk the closest stored checkpoint before the specified `--state-slot`. If no local checkpoint is found, Grandine will attempt checkpoint sync from a remote server (if configured) or fall back to the anchor checkpoint. If all fallback options fail, the node will exit with an error.

### Prune Mode

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