From: Thomas Hartman <thomashartman1@gmail.com>
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Date: Tue, 1 Sep 2020 16:07:21 -0400
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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


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This is in reply to David harding=E2=80=99s message at=20

=
https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2020-August/018129=
.html =
<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 =
noticing 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 napping. Related, I=E2=80=99d also like to have trades happening in =
lightning channels, and I=E2=80=99m not sure how this race affects the =
security assumptions there.=20

Further question about powswap.=20

It=E2=80=99s currently block 64632 with retarget in 808 blocks. I=E2=80=99=
d like to bet that=20

* 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 slices of time in the future. Possible?=20



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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">This =
is in reply to David harding=E2=80=99s message at&nbsp;<div class=3D""><br=
 class=3D""></div><div class=3D""><a =
href=3D"https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2020-Augus=
t/018129.html" =
class=3D"">https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2020-Au=
gust/018129.html</a></div><div class=3D""><br class=3D""></div><div =
class=3D"">(For some reason didn=E2=80=99t arrive in my inbox, so I was =
late noticing it, and I am replying in this way. Sorry if it screws up =
threading.)</div><div class=3D""><br class=3D""></div><div =
class=3D"">Powswap sounds great! And it doesn=E2=80=99t require any =
protocol changes! Very cool.</div><div class=3D""><br =
class=3D""></div><div class=3D"">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 napping. Related, I=E2=80=99d =
also like to have trades happening in lightning channels, and I=E2=80=99m =
not sure how this race affects the security assumptions =
there.&nbsp;</div><div class=3D""><br class=3D""></div><div =
class=3D"">Further question about powswap.&nbsp;</div><div class=3D""><br =
class=3D""></div><div class=3D"">It=E2=80=99s currently block&nbsp;<span =
style=3D"background-color: rgb(255, 255, 255);" class=3D""><font =
face=3D"Menlo" class=3D""><span style=3D"font-size: 11px;" =
class=3D"">64632 with retarget in 808 blocks. I=E2=80=99d like to bet =
that&nbsp;</span></font></span></div><div class=3D""><span =
style=3D"background-color: rgb(255, 255, 255);" class=3D""><font =
face=3D"Menlo" class=3D""><span style=3D"font-size: 11px;" class=3D""><br =
class=3D""></span></font></span></div><div class=3D""><span =
style=3D"background-color: rgb(255, 255, 255);" class=3D""><font =
face=3D"Menlo" class=3D""><span style=3D"font-size: 11px;" class=3D"">* =
the first 6 blocks after the retarget are found in under an =
hour</span></font></span></div><div class=3D""><span =
style=3D"background-color: rgb(255, 255, 255);" class=3D""><font =
face=3D"Menlo" class=3D""><span style=3D"font-size: 11px;" class=3D"">* =
AND the new difficulty exceeds some&nbsp;threshold. Is such a bet =
currently possible with&nbsp;powswap?</span></font></span></div><div =
class=3D""><span style=3D"background-color: rgb(255, 255, 255);" =
class=3D""><font face=3D"Menlo" class=3D""><span style=3D"font-size: =
11px;" class=3D""><br class=3D""></span></font></span></div><div =
class=3D""><span style=3D"background-color: rgb(255, 255, 255);" =
class=3D""><font face=3D"Menlo" class=3D""><span style=3D"font-size: =
11px;" class=3D"">I see how&nbsp;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 slices of time in the future. =
Possible?&nbsp;</span></font></span></div><div class=3D""><br =
class=3D""></div><div class=3D""><br class=3D""></div></body></html>=

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