inspired from python eventscanner from web3.py docs: https://web3py.readthedocs.io/en/stable/examples.html
Special thanks to Chat-GPT :)

to run:
npm i
configure inputData.json as needed
npx node .\scripts\eventscanner.js

everything is configured via the inputData JSON file:

WEB3: your the rpc URL
STARTBLOCK: the first block you wish to scan
ENDBLOCK: the last block to scan
MAXCHUNK: the maximum number of blocks you can scan in 1 request
EVENTNAMES: names of the events you want to check, must match the ABI "name" field
"ABI": ABI's for the contracts you want to scan for
"ADDRESSES": The contract addresses which emit the events

This example scans for all Sync and Swap events for a list of Uniswap pairs.

scans in chunks of MAXCHUNK until all specified blocks are scanned and stores them in ./Data/BlockData{start}-{end}Hash:{Hash of addresses and event signiatures for a unique identifier}
periodically autosaves
saves on Ctrl+C interupt

post processing can then be done on the output file