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Nodes that fully verify all of the rules of Bitcoin. The most popular software implementation of full nodes is called Bitcoin Core.

2 votes
Accepted

Do Full Nodes perform Proof of Work to validate a Block?

Hashcash-style proof of work is a simple search process: Try lots of nonce values until you get an acceptable solution. To verify a node simply just has to try one value, the one the miner provided. …
G. Maxwell's user avatar
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1 vote

Possible optimisation to bitcoin propagation

Not sure how this didn't get more completely answered previously. Bitcoin has not sent the full block as the primary propagation method for a couple years now, see BIP 152. What gets sent is the blo …
G. Maxwell's user avatar
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5 votes
Accepted

Is the idea of fraud proofs possible in reality?

The whitepaper said that SPV clients would avoid accepting a rules violating block by being altered to the violation, downloading the block, and checking for themselves. This is not realistically poss …
G. Maxwell's user avatar
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4 votes
Accepted

Bitnodes for node on testnet

Testnet is a distinct although largely similar protocol. Bitnodes would need to specifically support it for it to work with it. I can't find any evidence that bitnodes has any testnet support or a t …
G. Maxwell's user avatar
  • 7,727