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SPV wallets check the merkle proof of a transaction which proves that the network has accepted it. They do not check the consensus rules themselves. The fact that the network accepted the tx means that it passed consensus rules.

Blake-Kaufman Автор вопроса
Kallisti Kallisti
SPV wallets check the merkle proof of a transactio...

When you say “network accepted the transaction” what does that mean?

Blake Kaufman
When you say “network accepted the transaction” wh...

That means that nodes relayed it and/or it's been accepted into a block

Blake-Kaufman Автор вопроса
Kallisti Kallisti
That means that nodes relayed it and/or it's been ...

What nodes? Because I think you said SPV nodes require the network to have already excepted it?

Blake-Kaufman Автор вопроса
Kallisti Kallisti
nodes as in full nodes/miners

Ok so someone will have to be downloading every block?

Blake Kaufman
Ok so someone will have to be downloading every bl...

yes, but it's mostly going to be business entities and hobbyists that have any need or desire to run a full node

Blake-Kaufman Автор вопроса
Kallisti Kallisti
yes, but it's mostly going to be business entities...

But could we agree that the data requirements could turn away a lot of people from the ability to run a node?

Blake-Kaufman Автор вопроса
Kallisti Kallisti
sure, that's just the cost of doing business

But you don’t think geographically dispersing the entire network is important? Or having as many copies of the network as possible is important?

Blake Kaufman
But you don’t think geographically dispersing the ...

geographical distribution is important but there are datacenters all over the world, it's literally a non-issue. I could spin up a node in Singapore right this second if I wanted to

Blake-Kaufman Автор вопроса
Blake Kaufman
But could we agree that the data requirements coul...

It is about scale, yes. But stating that nothing will be run because of theoretical sizes later on is like stating that no one will run cars because not everyone can own a gas station. Will you be turned away from running a cab service just because you cannot build a gas station in your backyard? No, you likely won't. You will happily own the car and run the service knowing that there are other nodes (gas stations) you can connect to when you need new information (gas).

Blake Kaufman
But you don’t think geographically dispersing the ...

I shared with you the global statistics for average (i.e. not above average) bandwidth speeds. 32 MB blocks can be run pretty much anywhere nowadays.

Blake-Kaufman Автор вопроса
;e)
I shared with you the global statistics for averag...

Do we know the current amount of transactions that happen on BTC,BCH,LTC, and Lightning?

yes, because all you need to validate a TX is in that TX you're interested in. The only thing you can't verify is whether the coins it's spending are real coins, and in case of SPV you trust that others have checked it else the TX wouldn't be embedded in the blockchain (you verify that part with the header chain)

Blake Kaufman
When you say “network accepted the transaction” wh...

it means that you know that the TX has been mined and has X confirmations

Blake Kaufman
But could we agree that the data requirements coul...

Why would I run a node even now? It's inconvenient and doesn't give me more utility than just using light wallets connected to Electrum servers. I never ran a node as an user. Light wallets ftw. I ran a node because I was interested in data mining the blockchain.

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