> On Jul 6, 2019, at 01:16, ZmnSCPxj <zmnsc...@protonmail.com> wrote:
> 
> Good morning Eric,
> 
> 
> Sent with ProtonMail Secure Email.
> 
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Saturday, July 6, 2019 3:27 AM, Eric Voskuil <e...@voskuil.org 
> <mailto:e...@voskuil.org>> wrote:
> 
>>> On Jul 4, 2019, at 21:05, ZmnSCPxj zmnsc...@protonmail.com wrote:
>>> Good morning Eric,
>>> 
>>>> As with Bitcoin mining, it is the consumed cost that matters in this 
>>>> scenario, (i.e., not the hash rate, or in this case the encumbered coin 
>>>> face value). Why would the advertiser not simply be required to burn .1 
>>>> coin for the same privilege, just as miners burn energy? Why would it not 
>>>> make more sense to spend that coin in support of the secondary network 
>>>> (e.g. paying for confirmation security), just as with the burning of 
>>>> energy in Bitcoin mining?
>> 
>> Good morning ZmnSCPxj,
>> 
>>> Using the unspentness-time of a UTXO allows for someone advertising a 
>>> service or producer to "close up shop" by simply spending the advertising 
>>> UTXO.
>>> For instance, if the advertisement is for sale of a limited stock of goods, 
>>> once the stock has been sold, the merchant (assuming the merchant used own 
>>> funds) can simply recover the locked funds, with the potential to reinvest 
>>> them elsewhere.
>>> This allows some time-based hedging for the merchant (they may be willing 
>>> to wait indefinitely for the stock to be sold, but once the stock is sold, 
>>> they can immediately reap the rewards of not having their funds locked 
>>> anymore).
>> 
>> This is a materially different concept than proposed by Tamas.
>> 
>> “...he gives up his control of the coins until maturity, he can not use them 
>> elsewhere until then.”
> 
> Possibly.
> In a way, this is giving up control of the coin, until he no longer needs the 
> advertisement, i.e. dynamically select the maturity age needed.
> 

My proposal would separate the owner of the funds from the one using the 
advertizement service. Yes, the owner lock up until maturity. But those using 
the UTXO for the advertizement service could transfer (sell) the UTXO to 
someone else as soon as they do not need it, so it is dynamic maturity for them 
The new owner could use them for an other advertizement or for an entirely 
different purpose.

Regarding burning: I think burning is unsustainable as usage of services is 
unlimited while coin suply is limited.

>> 
>> And as I have shown above, nor can a “locked-up” coin be unlocked to do the 
>> same.
> 
> You have shown no such thing, merely shown that you have not understood the 
> proposal.
> 
> Regards,
> ZmnSCPxj

I also struggle to communicate to Eric and likely many other reader the generic 
utility of temporary control of an UTXO. Let me try again:

Bitcoin offers a memory with remarkable properties:
- it can be read by anyone anywhere
- anyone anywhere who knows a key controlling an UTXO, and only them, can 
initiate an update to the memory
- global replicas guaranteed to apply updates of the memory within a short time 
period.

This is a utility that is sufficient to implement money.

Such a reliable shared memory could have however more uses than tracking money, 
It could keep track of, and thereby make scarce, arbitary other things.

We can unlock these uses by separating the money use of memory from other uses.

The covenant achives this separation temporarily. A UTXO with a covenant that 
guarantees that current owner re-gains control at a later time means,
that the current owner temporarily forgoes the UTXOs use as money and thereby 
allows its temporary use to keep track of something else.
UTXOs with different covenants or without covenant are not fungible.

Why use UTXOs of significant value to track something that is not money? 
Because the reason the registry is used is to create scarcity and scarcity can 
be tailored to more or
less severe by requiring more or less satoshis to track something.

The current owner of a regular UTXO will want to be paid for temporarily giving 
up control, and that payment represents interest. Riskless, since it is certain 
to re-gain control.

Regards,

Tamas Blummer





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