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RE: Random Thoughts: How Hierarchical Blockchains Can Allow Mobile Devices To Become Full Nodes
They store the entire history for added security and trustlessness. But the price we pay for it is just too much. A Hierarchical Blockchain is pretty much a system of meta-blockchains where each layer is built based on the lower layer and everything is on chain.
How does a record of entire history of transactions add security or trustlessness?
The verification process includes consensus between different nodes regardless of how much data there is in them and to prevent double spending only the last state matters, or perhaps the previous before last should be considered as well, but not every state since forever.
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Supply Auditability
This is something Zcash gets accused of due to them having the coin values hidden. When coins are created through inflation, how do we know that they weren't forged. that's what the paranoid people are saying. I mean some blockchain devs have their doomsday bunkers set up. You can say that the complete history keeping is a straw man argument and it sort of is. But it's never too bad to be too cautious.
Instead we can have a meta-blockchain that takes the info from the blockchain. This method can satisfy the paranoid people who want to keep a full copy while making everything scaling friendly.
Every node is supposed to know the limit on the amount and the current state.
When currency is created, if it is supposed to be approved, then how does an entire history help to verify that it is not forged?
It does not stem from any past transaction anyway and has to be approved by consensus anyway.
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For coins that obscure the values of the coins, this is a problem. This is mainly an issue with privacy coins:
https://zcoin.io/zcoins-privacy-technology-compares-competition and I'v seen some discussions here: https://www.reddit.com/r/Bitcoin/comments/115bpy/question_why_is_the_entire_blockchain_required/
Some people are just no willing to trust in the older blocks without a full history.
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