18:22:46 <gingeropolous> total miners 30328
18:29:15 <cohcho> someone with only 4 bytes in tx_extra mined two blocks in a row and leaved me with orphan block
18:29:55 <gingeropolous> which blocks cohcho ?
18:29:56 <cohcho> I don't know such pools and it's not monerod
18:31:02 <cohcho> 2025528, 2025529
18:34:12 <gingeropolous> yeah, doesn't seem to be from a large well known pool
18:36:54 <cohcho> I've received their block within 500ms after monerod had broadcasted my own and then got reorg. And both blocks have 39 bytes long tx_extra or 4 bytes long extra_nonce. Therefore i'm sure they mined both blocks
18:40:29 <gingeropolous> is there any real defense against selfish mining?
18:40:40 <gingeropolous> but that does suggest that the miner has significant hash power
18:41:06 <gingeropolous> have they mined any other blocks with that signature?