Nico Flaig 277758e330 feat: add semi supernode flag (#8568) ...

**Motivation**

Enable more efficient data availability with lower bandwidth and storage
requirements compared to a supernode.

**Description**

Adds new `--semiSupernode` flag to subscribe to and custody half of the
data column sidecar subnets to support blob reconstruction. This change
in combination with https://github.com/ChainSafe/lodestar/pull/8567 will
make it a lot less resource intensive to run a blob serving node.

I went with the same flag name as Lighthouse currently uses for this
https://github.com/sigp/lighthouse/issues/8218 to make it easier for
users, even though I don't think this flag name is great. We can look
into other ways to reconstruct blobs later, like fetching missing
columns over req/resp, which will eventually become necessary if we want
to support home operators that need blobs with higher max blob counts.

**Note:** If the custody group count of the node was higher than 64
previously it will not be reduced. It is required to remove the ENR
either manually or by setting `--persistNetworkIdentity false` to reset
the custody requirements.

2025-10-27 08:40:49 -04:00

1.9 KiB

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