Re: [bitcoin-dev] Full node "tip" function

From: Aymeric Vitte <vitteaymeric@gmail•com>
To: bitcoin-dev@lists•linuxfoundation.org
Subject: Re: [bitcoin-dev] Full node "tip" function
Date: Thu, 4 May 2017 15:37:43 +0200	[thread overview]
Message-ID: <02b56878-c4e5-d1b9-07f4-317663f543b5@gmail.com> (raw)
In-Reply-To: <1493894309.1179269.965498864.6244705A@webmail.messagingengine.com>

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Strange idea, incentiving people to run full nodes should certainly not
depend on miners, should certainly not involve another wasteful pow and
should certainly not encourage any collusion between participants like
miners are doing (ie full nodes pools for example or miners creating
full nodes pools)


Le 04/05/2017 à 12:38, Tomas via bitcoin-dev a écrit :
> The ones that *could* pay non-mining full nodes are miners/pools, by
> outsourcing transaction selection using a different PoW.  By doing so
> they could buy proof-of-uncensored-selection and proof-of-goodwill for
> a small fee.
>
> We would allow full nodes to generate and broadcast a template block
> which:
>
> * Does not contain a valid header yet
> * Contains the transaction selection
> * Contains a coinbase output with a predetermined part of the block
> reward (say 0.5%) to themselves
> * Contains a nonce for PoW of a predetermined currently ASIC resistant
> hash function behind a OP_RETURN.
>
> The template with the highest PoW since the last block would be
> leading. A miner/pool can then choose to use this instead of their
> own, adding the rest of the reward and the SHA nonce themselves. That
> way they would set up a competition among full nodes.
>
> This would of course be voluntary but provable, so maybe in a pool's
> interest to do this via naming and shaming.
>
> Tomas
> bitcrust
>
> On Wed, May 3, 2017, at 23:43, Ben Thompson via bitcoin-dev wrote:
>> I feel like this would be pointless as the vast majority of users
>> would likely download the blockchain from a node that was not
>> enforcing a tip requirement as it would seem like unnecessary cost as
>> in protocols such as BitTorrent there is no such tips in sharing
>> files and the blockchain distribution is in eccense the same thing.
>> However perhaps I am underestimating the generosity of node operators
>> but I feel that adding a cost to the blockchain (assuming that all
>> users add a tip requirement) would lead to centralisation.
>>
>> On Wed, 3 May 2017, 22:21 Erik Aronesty via bitcoin-dev,
>> <bitcoin-dev@lists•linuxfoundation.org
>> <mailto:bitcoin-dev@lists•linuxfoundation.org>> wrote:
>>
>>     IDEA:
>>     - Full nodes advertise a bitcoin address.   Users that need to
>>     download the block chain from that node can be encouraged to send
>>     a tip to the peers that served them (by % served).   Recommended
>>     tip of 10mbit should be fine.
>>
>>     - A full nodes can *require* a tip to download the blockchain. 
>>     If they do, users that don't specify a tip cannot use them.
>>
>>     CONS:
>>
>>     For some people, this may represent a barrier to hosting their
>>     own full node.   After all, if you have to pay $15 just to get a
>>     copy of the blockchain, that just adds to the already expensive
>>     prospect of hosting a full node.  
>>     PROS:
>>
>>     As long as you manage to stay online, you should get your money
>>     back and more.   This is the an incentive for quality, long term
>>     hosting.
>>     In the long term, this should cause stable nodes to stick around
>>     longer.   It also discourages "installation spam" attacks on the
>>     network.
>>     Fees for other node operations can be considered if this is
>>     successful.
>>
>
>
>
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> bitcoin-dev@lists•linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev

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