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How Does A Node Get Infomation From The TxID - that is, isn't the TxID the SHA^2(256) of various transaction components?

Yes, all txids are calculated only from non-witness data. While many nodes have a complete copy of the blockchain (which does contain all transactions), most nodes do not have a full transaction index....
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2 votes
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What Are The Parts Of A Bitcoin Transaction In SegWit Format?

In an answer to In what format does a block store the transaction data? I gave an example of hand decoding the structure of the earliest Bitcoin transactions from a hex dump. A Segwit transaction ...
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1 vote
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How does Bitcoin Core know about a new address created in a different wallet?

Modern wallets will pre-generate a lot of keys instead of generating them when you ask for them. For example, you might have used 10 addresses from your wallet, but your wallet actually has 110 ...
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How do I know if the Bitcoin Core software on my computer is running taproot, segwit or something else?

Until Bitcoin Core 23.0.0, the status of deployments of consensus changes can be listed with the getblockchaininfo command: Returns an object containing various state info regarding blockchain ...
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