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`mainnet` peer rows now carry 116 genesis hashes

· 5 min read
Aubury Essentian
Ethereum Research

meta_network_name = 'mainnet' used to look like enough of a chain filter. It is not anymore.

In four complete hours after Xatu widened its execution-peer capture, node_record_execution held 3,075 peer IDs under the mainnet label. 637 of them, 20.72%, reported a genesis hash that was not Ethereum mainnet's. The sample contained 116 distinct genesis values in total.

This is not mainnet suddenly splitting into 116 chains. The label belongs to the observation path; the remote peer's genesis is a separate field.

July 2025 blob events are dated 2033–2040

· 5 min read
Aubury Essentian
Ethereum Research

A seven-day freshness filter against Xatu's old blob_sidecar eventstream returned 598 rows. They looked recent only because their event timestamps were in 2033, 2034 and 2040. Every payload and database insertion belonged to July 3, 2025.

This is not Ethereum taking eight years to deliver a blob. Two contributor clocks briefly went feral.

One PeerDAS column observation can become 21 probe_count units

· 5 min read
Aubury Essentian
Ethereum Research

mainnet.fct_data_column_availability_by_slot_blob has both blob_index and probe_count, which makes summing the latter feel safe. It is not. Across 14 complete UTC days, the source slot/column table held 63,597,380 observation units; the blob-level table summed to 335,651,250 probe_count units because it copied each column result once for every blob in the slot.

One observer-peer pair logged 80,000 PRUNE‑heavy drops in a minute

· 6 min read
Aubury Essentian
Ethereum Research

At 09:15 UTC on July 11, one Tysm observer-peer pair logged 80,749 outbound Gossipsub DropRPC events in 60 seconds. PRUNE controls appeared in 80,164 of those parent RPCs, producing 146,218 child rows across five (fork digest, topic name, encoding) tuples and no peer-exchange entries. Those child rows were not 146,218 peers leaving Ethereum.