I've set up zeromq so I can listen for blocks & transactions. However I'm not certain how I can ping the bitcoin node for older information.
Is there someway I can ping the bitcoin node for say a block at X height or say a transaction with X id?
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https://github.com/ruimarinho/bitcoin-core – pinhead Sep 18 '21 at 17:31
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getrawtransaction can be used for transactions if txindex=1 is saved in config
getblock can be used for blocks
Since you mentioned nodejs, you should check bcoin: https://github.com/bcoin-org/bcoin
Bitcoin nodes can even be run in browser.