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e924264e17
Previously only supernode contributes to data column publishing in Lighthouse.
Recently we've [updated the spec](https://github.com/ethereum/consensus-specs/pull/4183) to have full nodes publishing data columns as well, to ensure all nodes contributes to propagation.
This also prevents already imported data columns from being imported again (because we don't "observe" them), and ensures columns that are observed in the [gossip seen cache](d60c24ef1c/beacon_node/beacon_chain/src/data_column_verification.rs (L492)) are forwarded to its peers, rather than being ignored.