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Does it come up anywhere else? I already understand that logs are 'on-chain' storage (via the transaction receipts trie) for events which you can add to your contract code; topics are searchable indexed fields for those logs; and the logs bloom filter allows an efficient search of the block headers for the log topics, where you don't care about false positives. |
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Answer from @ajsutton: Probably not too useful to understand in detail as it a fairly standard bloom filter. It's not used anywhere else in Ethereum. Bloom filters are only useful if you can rule out a lot of stuff, they are less useful if you get higher hit rates. |
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Answer from @ajsutton:
Probably not too useful to understand in detail as it a fairly standard bloom filter. It's not used anywhere else in Ethereum.
Bloom filters are only useful if you can rule out a lot of stuff, they are less useful if you get higher hit rates.
Sizing bloom filters is difficult.