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authorSjors Provoost <sjors@sprovoost.nl>2025-04-01 11:06:05 +0200
committerbitcoindev <bitcoindev@googlegroups.com>2025-04-01 03:09:51 -0700
commitc23418fe33c71ab338a2146b00fd5500b4a09247 (patch)
treea90bfe07c3de95b64085e483bca973607dcbdd1e
parentbf99df440ad097f2bd7ca76445bd9582d1c2054b (diff)
downloadpi-bitcoindev-c23418fe33c71ab338a2146b00fd5500b4a09247.tar.gz
pi-bitcoindev-c23418fe33c71ab338a2146b00fd5500b4a09247.zip
Re: [bitcoindev] Does anyone still need testnet3?
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+ 1 Apr 2025 05:06:16 -0400 (EDT)
+From: Sjors Provoost <sjors@sprovoost.nl>
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+Subject: Re: [bitcoindev] Does anyone still need testnet3?
+Date: Tue, 1 Apr 2025 11:06:05 +0200
+In-Reply-To: <CAExE9c8DHicBYUt-6LfH96rLEW=6gkGxn-smsCY1vnahyPKXpA@mail.gmail.com>
+Cc: Sanket Kanjalkar <sanket1729@gmail.com>
+To: Bitcoin Development Mailing List <bitcoindev@googlegroups.com>
+References: <9FAA7EEC-BD22-491E-B21B-732AEA15F556@sprovoost.nl>
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+
+Hi Sanket,
+
+I've heard before from some lightning folks that migrating to testnet4 pres=
+ents a chicken-egg problem.
+
+If we were to start rotating test networks a frequency of e.g. once every t=
+hree years, this would become a recurring problem.
+
+Lightning seems to be a special case because it relies heavily on interoper=
+ability, and so any move has to be coordinated between multiple parties eac=
+h with their own priorities.
+
+At the same time Lightning software often needs the latest and greatest Bit=
+coin Core version e.g. for its new policy features. So sticking to v29 back=
+-ports isn't a long term viable option.
+
+
+I think it's worth considering for the lightning industry to organize a cus=
+tom signet, either a 1-of-N with keys distributed among the current players=
+, or unsigned proof-of-work based (more hassle, but future new players may =
+feel more comfortable joining). Such a network can be kept online definitel=
+y and its replacement can be more easily coordinated. Another advantage is =
+that soft fork proposals can be tested, similar to how Inquisition does tha=
+t on the default signet, but at a pace that matches Bolt spec work.
+
+- Sjors
+
+> Op 31 mrt 2025, om 23:15 heeft Sanket Kanjalkar <sanket1729@gmail.com> he=
+t volgende geschreven:
+>=20
+> Hi Sjors,=20
+> Thanks for asking. Block/Cashapp relies on testnet3 and can't migrate to =
+testnet4 mostly because of lack of lightning LND peers.
+> I don't think there are any LND Lightning peers on testnet4. We (Block/Ca=
+shapp lightning) use LDK for Lightning, but most of our peers run LND. LND =
+support for testnet4 was just merged <https://github.com/lightningnetwork/l=
+nd/pull/9620>, so it=E2=80=99ll likely take time for the LND community to u=
+pdate node infrastructure.
+> We want to catch peering, business logic and lightning implementations in=
+teroperability issues in testnet. Even though LDK supports testnet4, switch=
+ing now isn=E2=80=99t viable for us until our mainnet LND peers migrate.=20
+>=20
+
+--=20
+You received this message because you are subscribed to the Google Groups "=
+Bitcoin Development Mailing List" group.
+To unsubscribe from this group and stop receiving emails from it, send an e=
+mail to bitcoindev+unsubscribe@googlegroups.com.
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+4B21A2CA-2224-4BD1-AA5D-C5B2F8859E4B%40sprovoost.nl.
+
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+
+<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=
+=3Dutf-8"></head><body style=3D"overflow-wrap: break-word; -webkit-nbsp-mod=
+e: space; line-break: after-white-space;">Hi Sanket,<div><br></div><div>I'v=
+e heard before from some lightning folks that migrating to testnet4 present=
+s a chicken-egg problem.</div><div><br></div><div>If we were to start rotat=
+ing test networks a frequency of e.g. once every three years, this would be=
+come a recurring problem.</div><div><br></div><div>Lightning seems to be a =
+special case because it relies heavily on interoperability, and so any move=
+ has to be coordinated between multiple parties each with their own priorit=
+ies.</div><div><br></div><div>At the same time Lightning software often nee=
+ds the latest and greatest Bitcoin Core version e.g. for its new policy fea=
+tures. So sticking to v29 back-ports isn't a long term viable option.</div>=
+<div><br></div><div><br></div><div>I think it's worth considering for the l=
+ightning industry to organize a custom signet, either a 1-of-N with keys di=
+stributed among the current players, or unsigned proof-of-work based (more =
+hassle, but future new players may feel more comfortable joining). Such a n=
+etwork can be kept online definitely and its replacement can be more easily=
+ coordinated. Another advantage is that soft fork proposals can be tested, =
+similar to how Inquisition does that on the default signet, but at a pace t=
+hat matches Bolt spec work.</div><div><br></div><div>- Sjors</div><div><br>=
+</div><div><div><blockquote type=3D"cite"><div>Op 31 mrt 2025, om 23:15 hee=
+ft Sanket Kanjalkar &lt;sanket1729@gmail.com&gt; het volgende geschreven:</=
+div><br class=3D"Apple-interchange-newline"><div><div dir=3D"ltr"><div>Hi S=
+jors,&nbsp;<br><p class=3D"gmail-">Thanks for asking. Block/Cashapp relies =
+on testnet3 and can't migrate to testnet4 mostly because of lack of lightni=
+ng LND peers.<br>I don't think there are any LND Lightning peers&nbsp;on te=
+stnet4. We (Block/Cashapp lightning) use&nbsp;LDK for Lightning, but most o=
+f our peers run LND. LND support for testnet4 was just <a href=3D"https://g=
+ithub.com/lightningnetwork/lnd/pull/9620">merged</a>, so it=E2=80=99ll like=
+ly take time for the LND community to update node infrastructure.<br>We wan=
+t to catch peering, business logic and lightning implementations interopera=
+bility issues in testnet. Even though LDK supports testnet4, switching now =
+isn=E2=80=99t viable for us&nbsp;until our mainnet LND peers migrate.&nbsp;=
+</p></div></div></div></blockquote></div><br></div></body></html>
+
+<p></p>
+
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