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From: Thomas Hartman <thomashartman1@gmail.com>
Date: Wed, 2 Sep 2020 10:40:28 -0400
Message-ID: <CAHAXnDWH7CEM_3-k8xKeW8X=gvsQU=nwu4pVcFgew_C1X8k2AQ@mail.gmail.com>
To: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
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Cc: jr@mit.edu
Subject: Re: [bitcoin-dev] reviving op_difficulty
Precedence: list

Replying to myself:

IIUC, Powswap seems to only create contracts from current time to future ti=
me.

But, you can create synthetic hashrate binaries for time span in the
future time A to time B, using powswap, by subtracting

(current time to B) - (current time to A)

IE, buy first, sell second.

On Tue, Sep 1, 2020 at 4:07 PM Thomas Hartman <thomashartman1@gmail.com> wr=
ote:
>
> This is in reply to David harding=E2=80=99s message at
>
> https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2020-August/01812=
9.html
>
> (For some reason didn=E2=80=99t arrive in my inbox, so I was late noticin=
g it, and I am replying in this way. Sorry if it screws up threading.)
>
> Powswap sounds great! And it doesn=E2=80=99t require any protocol changes=
! Very cool.
>
> One potential problem I see with powswap is iiuc you need something like =
watchtowers, or the loser of the bet can sweep the funds if the winner is n=
apping. Related, I=E2=80=99d also like to have trades happening in lightnin=
g channels, and I=E2=80=99m not sure how this race affects the security ass=
umptions there.
>
> Further question about powswap.
>
> It=E2=80=99s currently block 64632 with retarget in 808 blocks. I=E2=80=
=99d like to bet that
>
> * the first 6 blocks after the retarget are found in under an hour
> * AND the new difficulty exceeds some threshold. Is such a bet currently =
possible with powswap?
>
> I see how pow swap lets you bet on hashrate (ie block times) from current=
 time till some future time. But I would like to also bet on hashrate of sl=
ices of time in the future. Possible?
>
>