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[162.55.211.168]) by gmr-mx.google.com with ESMTPS id 5b1f17b1804b1-43d1fe6434fsi344155e9.1.2025.03.14.02.12.58 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Mar 2025 02:12:58 -0700 (PDT) Received-SPF: pass (google.com: domain of google.com@schildbach.de designates 162.55.211.168 as permitted sender) client-ip=162.55.211.168; Received: from [IPV6:2a02:3100:2592:b400:74dc:a27d:e5a4:f841] (dynamic-2a02-3100-2592-b400-74dc-a27d-e5a4-f841.310.pool.telefonica.de [IPv6:2a02:3100:2592:b400:74dc:a27d:e5a4:f841]) by mail.schildbach.de (Postfix) with ESMTPSA id 5EA38290353A; Fri, 14 Mar 2025 09:12:58 +0000 (UTC) Message-ID: <7c28f8e9-d221-4633-8b71-53b4db07fa78@schildbach.de> Date: Fri, 14 Mar 2025 10:12:57 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [bitcoindev] Does anyone still need testnet3? Content-Language: en-US To: Sjors Provoost , Bitcoin Development Mailing List References: <9FAA7EEC-BD22-491E-B21B-732AEA15F556@sprovoost.nl> From: "'Andreas Schildbach' via Bitcoin Development Mailing List" In-Reply-To: <9FAA7EEC-BD22-491E-B21B-732AEA15F556@sprovoost.nl> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: quoted-printable X-Original-Sender: google.com@schildbach.de X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@schildbach.de header.s=default header.b=KoMEmHPu; spf=pass (google.com: domain of google.com@schildbach.de designates 162.55.211.168 as permitted sender) smtp.mailfrom=google.com@schildbach.de; dmarc=pass (p=QUARANTINE sp=REJECT dis=NONE) header.from=schildbach.de X-Original-From: Andreas Schildbach Reply-To: Andreas Schildbach Precedence: list Mailing-list: list bitcoindev@googlegroups.com; contact bitcoindev+owners@googlegroups.com List-ID: X-Google-Group-Id: 786775582512 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Score: -1.0 (-) Hi Sjors, thanks for asking. Bitcoinj has just started to implement testnet4, but it's not finished=20 yet. And the next version 0.18 will probably not be released within 12=20 months, maybe longer. By the way, testnet3 works great for us (for testing). I consider block=20 storms a feature, because it tests our code in rough conditions. We had=20 planned to support both testnets in the forseeable future. https://github.com/bitcoinj/bitcoinj/ Then, there is btc-rpc-explorer, a self-hostable block explorer. It=20 doesn't yet support testnet4. I'm not affiliated to it, I'm just a user. https://github.com/janoside/btc-rpc-explorer Cheers, Andreas On 14/03/2025 09.52, Sjors Provoost wrote: > Dear list, >=20 > Testnet 4 was proposed last year in BIP94 [0] and is supported by Bitcoin= Core since v28. >=20 > To make Bitcoin Core easier to maintain we would like to drop support for= Testnet3 in a future release. This will happen no earlier than v30 this fa= ll. The upcoming v29 release still supports it, and will throughout its mai= ntenance period [1]. >=20 > The network itself can't be deleted, so anyone willing to maintain node s= oftware themselves can keep using testnet3 until the end of time. >=20 > One of the motivations for introducing testnet4 was that testnet3 became = increasing impractical to use due to block storms. So perhaps everyone alre= ady moved on to using testnet4 or a signet. >=20 > As an aside, it's possible to create a pure proof-of-work permissionless = signet without any signatures, by setting the challenge to OP_TRUE. [2] >=20 > However, if anyone is still using testnet3 and needs more time to move aw= ay from it, please let us know. E.g. as a reply to the list or a comment on= the Github issue [3]. This could include libraries, staging environments, = testnet wallets, etc. >=20 > Although the v29 maintenance window will last for a few years, it's also = important to know if dropping testnet3 would prevent you from upgrading to = the next major node version. In other words, if migrating away from testnet= 3 would take you longer than all of 2025. >=20 > Although "I don't feel like it" isn't a great technical argument, it's st= ill useful to know what to expect and perhaps others can help. >=20 > - Sjors >=20 > [0] https://github.com/bitcoin/bips/blob/master/bip-0094.mediawiki > [1] https://bitcoincore.org/en/lifecycle/#maintenance-period > [2] https://github.com/bitcoin/bips/blob/master/bip-0325.mediawiki#specif= ication > [3] https://github.com/bitcoin/bitcoin/issues/31975 >=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. To view this discussion visit https://groups.google.com/d/msgid/bitcoindev/= 7c28f8e9-d221-4633-8b71-53b4db07fa78%40schildbach.de.