Web3 is very hot. But you could search GitHub open source blockchain explorer, the most stars project is blockscout, https://github.com/blockscout/blockscout<https://github.com/blockscout/blockscout,> which use Elixir as a parallel engine to sync block from blockchain node into a file(CSV format). I think Flink is the best solution of ingestion. Reason:
(1)blockchain needs to match different chain, including Ethereum, Bitcoin, Solana, etc. through JSON RPC. (2)Like EtherScan, the blockchain needs to fetch the latest block into storage for the index to search. (3)Also as a supplement to (2), we need a connector to fully sync all block from Blockchain Node. I think Flink Stream/Batch alignment feature is suit for this scenarios. (4)According to FLIP-27, we could use block number as SourceSplit to read. It is very natural. (5)Flink Community could use web3 topic to get PR effects on web3 cycle. [1]https://issues.apache.org/jira/projects/FLINK/issues/FLINK-30445?filter=allissues [2]https://cwiki.apache.org/confluence/display/FLINK/FLIP-27%3A+Refactor+Source+Interface
