BTC testnet4 support

[jlopp]

FYI testnet3 is being deprecated; you can find the parameters for testnet4 here: bitcoin/bitcoin#29775

[cculianu]

Ah thanks for the heads-up. Yeah we in BCH also deprecated our testnet3 and are onto testnet4. Good to see the BTC people are doing similar. I'll look at their changes and add BTC testnet4 soon, if they didn't do anything crazy ...

[cculianu]

Oh ok I just noticed they haven't merged this yet but it looks essentially very compatible with existing testnet3, so it should be no problem to add support for this to Fulcrum. I will do so as soon as they merge this and/or plan a release containing it.

Thanks again for the heads-up. I will leave this issue open to remind myself to indeed add this to Fulcrum.

[jlopp]

Yeah it's not finalized yet but I think it's pretty close.

[cculianu]

Sounds good I’m traveling now but I’ll add support once I get back and have it ready for once they merge. Good stuff again thanks for the heads up!

[ast261]

"I will do so as soon as they merge this"

It's done.

[twofaktor]

Testnet4 on Fulcrum has been working for almost a month for me using the 1.11.0 version code:

And this config:

--> No code modifications are needed <--

[cculianu]

Oh yeah sorry I forgot to announce it -- I indeed added support for it! I guess I can close this issue now.

[twofaktor]

Oh yeah sorry I forgot to announce it -- I indeed added support for it! I guess I can close this issue now.

4 years ago 😁:

#50

[cculianu]

Oh no that was for BCH (we did test4 on BCH 4 years ago back in COVID times). Hmm. Actually I realized that if you have peering=true it will fail right now on BTC because there is no server seed list for BTC test4. I need to implement that ASAP. I'm re-opening this issue.

[cculianu]

Ok, peering support has been added, so peering=true should work now on BTC testnet4. There is currently only 1 known Electrum server for testnet4, my own -- at blackie.c3-soft.com ssl port 57010, which has been compiled-in as the "seeding" node for peering.

[cculianu]

Let me know if you guys need a new release.. I figure there's no rush since Core hasn't released a binary with testnet4 yet, Electrum doesn't yet support it, etc... so i figured anybody interested can build Fulcrum from source now.. but let me know if you really really really want a release now that has this...

[twofaktor]

if you really really really want a release now that has this...

It is not necessary at least for me, I can wait for the next Bitcoin Core release. Thanks for your implication 🙏

BTW: Testnet4 was recently merged!! -> bitcoin/bitcoin#29775 🚀