From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 02 Jun 2026 11:20:07 -0700 Received: from mail-oo1-f58.google.com ([209.85.161.58]) by mail.fairlystable.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1wUTig-0000Jl-B5 for bitcoindev@gnusha.org; Tue, 02 Jun 2026 11:20:07 -0700 Received: by mail-oo1-f58.google.com with SMTP id 006d021491bc7-69e47dbf2a7sf116171eaf.1 for ; Tue, 02 Jun 2026 11:20:06 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1780424400; cv=pass; d=google.com; s=arc-20240605; b=cEn8ckY1Xz+nEJ+GCxRlbFvn4tQPeohCht1GMkhlXTAmbQUA1vl65dUFslGNVjwHjJ hNCvb1bQBH3SgmnkPWHW+AyQeFXFbXHcHqKv8VlVHkA2GM5MVS9liXTJXCw37B1Ia8SR sfGgpdmxSJdOCB1LgU361s78GXEYQdjrEL9MEU2NJ1GOLScwdUh7tqbdJsslm0rDGr29 9xg/Aw5E02+IK5HmM9Fdvdncu7gGS0cv2miMdm3id+KGt+0uFj4Fh97eueHtXptcbD38 5ZfZSnS6jwm2iiJbLQULsUEiuzyWlsthHClBi7B7md36ywAYEOupSJEo+0K3d+QIdLnG YuTQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:reply-to:mime-version:feedback-id :references:in-reply-to:message-id:subject:cc:from:to:date :dkim-signature; bh=RmTSbHLSeIvxlyk+fuOdlEZl7drVWKTW9p0WWqg89xw=; fh=7q5Xz/f7H7MMNun98tv02cv+bP/wuf0yjWtKhPJVihc=; b=HptU68HlKhGfkc/VSUhK2cJAQPwLyW5w7wSH6uMHQ0tWQ+jvSR0TVbSFK0DU0jGQvx OOtEMcO/BaQUbrZfH9vK6aNUc+cbsAuvUsi9J6JSCVqNUHGZoN133t8zF+nGIWjYJlui D1jqJJE+/9TAkkBW9EvDlWre4r80wDw2NpoMFHYJI/BlotiUjBsK6EllKbhTk2RdpGT6 6Y1KottOx8KhQC+o4lS9hNSge6cWBdiXGSD1lIASTnlSg2K3IVhSwyFYm3iyScK/PCuC l/gBFrV2ZVeB/1A/6QPjFjdBSITJVTCWDno93+gecCPxEY25h3Kq/a6iAWcNTX1qmta7 O7Bg==; darn=gnusha.org ARC-Authentication-Results: i=2; gmr-mx.google.com; dkim=pass header.i=@protonmail.com header.s=protonmail3 header.b="oH/DsTXU"; spf=pass (google.com: domain of polespinasa@protonmail.com designates 79.135.106.118 as permitted sender) smtp.mailfrom=polespinasa@protonmail.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=protonmail.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlegroups.com; s=20251104; t=1780424400; x=1781029200; darn=gnusha.org; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:reply-to :x-original-authentication-results:x-original-sender:mime-version :feedback-id:references:in-reply-to:message-id:subject:cc:from:to :date:from:to:cc:subject:date:message-id:reply-to; bh=RmTSbHLSeIvxlyk+fuOdlEZl7drVWKTW9p0WWqg89xw=; b=HRNoNzDA1fP3BZhAn9hSsLStWpwaeMRYqOnCfI4XEajJCbtO8FePWkBkxd2pLONII3 b5polJy+R+2KxgDxTRsqWsxVbxDZPN1I8xVqRKNNbUcumrnW6mOf69Jl/ORtYf7veeYA VpM5WCWjK6R2k3qW7UP0BXhZT0QuXpYKXZIPAdsiYEseyajQkAmoVhaiAlRXDBKXfBY5 VTKwKISpMfMxHVUcrRCI5ODe5/rCqOasJrF5Pnfz5VsMDFaN7Nnx1p+5w4V2S301qFnV 68D/YkD34gx3ty11oi+UlzzA/GAH//w2jJD6MJlSbd9OGi+ast+x0hYwcyarPy6i53Ye BFAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780424400; x=1781029200; h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post :list-id:mailing-list:precedence:reply-to :x-original-authentication-results:x-original-sender:mime-version :feedback-id:references:in-reply-to:message-id:subject:cc:from:to :date:x-beenthere:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=RmTSbHLSeIvxlyk+fuOdlEZl7drVWKTW9p0WWqg89xw=; b=c5EID00L7gy8kfSNeChnxuF2XAnZ2r8A+PYpYBb3MLsS4ka/D/0OG6+dOZ4TBJFiN4 CzT8sekkE2NhYBj/uyCppP+F6ASBD6sPedRc1C3YV4sFgYGdPWbdfcDsWRxJ+fRTp+xk OD8ZEwcSXXqwGTtMWGStKe59rQAKQjobot60AfmxSXYJOUxFuatGbcy1hYTotQpF7Jqn ysxIboBnsZxTRLn0llMk5UBoNvupO9M92QBEiYXRcPNxA4FB6luAMWSwa6G8PzRQY0Ne w3oR4djTJQlbpfQbtm2I6dPLHYiAWJu5uwd1NN2fX59J5kFHdvkI8KGx9fiOSyN93vL4 EP6w== X-Forwarded-Encrypted: i=2; AFNElJ9Cu6EBYI9W+olX4Ftd/a2cY5HHP2bHrWgZV+r1Vxtxlg3cf8Ph7WXDQKYQxhBfyb5Txwb7eA4Fs8S6@gnusha.org X-Gm-Message-State: AOJu0YxAhYM2F+MfgYxxt230Ugg0qr3guS0x6e0AJ+4ToA4yIXeHsCMK rn7w6qdw/bWTkOCsr7D8XZtyHtmxhGmr814WD7pz81e1wRNSjtEQY51U X-Received: by 2002:a05:6820:4b93:b0:69e:3fd:5c7f with SMTP id 006d021491bc7-69e4752b9b1mr223478eaf.5.1780424400303; Tue, 02 Jun 2026 11:20:00 -0700 (PDT) X-BeenThere: bitcoindev@googlegroups.com; h="AUV6zMOFPVrZ40UwMQcx20e9ir8U2eYOWq+/B3Ac/lMyXPi5qw==" Received: by 2002:a05:6870:ecac:b0:423:73f9:2b3 with SMTP id 586e51a60fabf-440d853cc42ls49947fac.1.-pod-prod-00-us-canary; Tue, 02 Jun 2026 11:19:56 -0700 (PDT) X-Forwarded-Encrypted: i=2; AFNElJ8Vztv+XtFM/MAideUUBsyjYAAas+mR2kAU/bEkBIMT+TABNXJ1sA/dwBSLZyo+OpTlRGlcSB7TOCUE@googlegroups.com X-Received: by 2002:a05:6808:398c:b0:45f:103c:2483 with SMTP id 5614622812f47-486588cc42dmr220237b6e.23.1780424396681; Tue, 02 Jun 2026 11:19:56 -0700 (PDT) Received: by 2002:ab3:750e:0:b0:302:7afe:cfcd with SMTP id a1c4a302cd1d6-3027afed342msc7a; Tue, 2 Jun 2026 09:49:01 -0700 (PDT) X-Forwarded-Encrypted: i=2; AFNElJ9MAGwiQ2LPd5DJdZovFwkaQyzrrcIUFPmVa0g2UFlMgZLqpOjnbeWPwu4V5r93mf6K4wWB0knEm7ZX@googlegroups.com X-Received: by 2002:a2e:a804:0:b0:396:2845:570d with SMTP id 38308e7fff4ca-396ac25fcc5mr1551941fa.6.1780418939165; Tue, 02 Jun 2026 09:48:59 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1780418939; cv=none; d=google.com; s=arc-20240605; b=lNecXVqghfce1vMZaD01U01qK3Y9oedQ/oSC1rI8dOEZU408sKHUi/abc7zpI9ORXn TgimcRyvfr+Cl2qVLZc3s7trhiuv8tMmXd/jq1+4Wff2+1Sf9m8kxBF/VyiwG2eCQS6r RxDytz7F6QOYLiEU0gBUEw29mq6KMordGxa1791Pmx0C5E6cnUaOi+fc/0hF8jrKKMg0 ZTHSs2sXv+RA7aUr6/BC4JxDhcoR+/c/A2xERHZnvrWh39ApPy/93oCWYv8GLW8gUW2k Wd2cT601HOiK2LNWoiQwyJsMvw4RLDjPpxda+ozlRWbnDYWAXosi5r7un2r065X+33qB x8Fg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605; h=mime-version:feedback-id:references:in-reply-to:message-id:subject :cc:from:to:date:dkim-signature; bh=tyRjq3O02wrMBIc6HC25ZPv/8yc5Fsk01d/kpmVfE3o=; fh=SEuPW3Z8ag4eD7M1wu86RXPazgoCAsY97HJD836Bqqg=; b=FOE0fZCKCQAQ0QR7pBrArSqSHt/3SNKCh/KZPfJcN40SEHh9ugEcnw1+pO8Z2fSMcX /QtxwmSZej5GpNBHBd9romV6E60TdEeD4o3cFJIyvQBSTH25vZOxRo8zczJX70wIjUWv 2iP5GojltAP6QKyTOnvXIJ+rbWNzqdabOaDeCJJK2AN5OMlqlz7rbB9jUGF8bB/1KnqH Rmw1GXN+wRIBpRSAFp4t4yaPyDKyPoVS7XxmRecwkpliDmu6RI3FrGo2jZpJPpdftxhF P6gtINsEcgv3O494hwiris5LS3HF1Wg95Ma/nSe2jtx7nRF3LNK1nYQOnvSybA444VqA ZgfQ==; dara=google.com ARC-Authentication-Results: i=1; gmr-mx.google.com; dkim=pass header.i=@protonmail.com header.s=protonmail3 header.b="oH/DsTXU"; spf=pass (google.com: domain of polespinasa@protonmail.com designates 79.135.106.118 as permitted sender) smtp.mailfrom=polespinasa@protonmail.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=protonmail.com Received: from mail-106118.protonmail.ch (mail-106118.protonmail.ch. [79.135.106.118]) by gmr-mx.google.com with ESMTPS id 38308e7fff4ca-396abf368d3si75431fa.2.2026.06.02.09.48.59 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Jun 2026 09:48:59 -0700 (PDT) Received-SPF: pass (google.com: domain of polespinasa@protonmail.com designates 79.135.106.118 as permitted sender) client-ip=79.135.106.118; Date: Tue, 02 Jun 2026 16:48:56 +0000 To: Garlo Nicon From: "'Pol Espinasa' via Bitcoin Development Mailing List" Cc: Saint Wenhao , "bitcoindev@googlegroups.com" Subject: Re: [bitcoindev] [BIP Draft] Testnet 5 Message-ID: In-Reply-To: References: Feedback-ID: 138051716:user:proton X-Pm-Message-ID: c5ff1507d37439f0754428c67278de0452032e4c MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pgp-signature"; micalg=pgp-sha512; boundary="------ef2b60a910b74ce84ed7bf31ae5ff7ed96b608ec58cedffc67481676d71f1923"; charset=utf-8 X-Original-Sender: polespinasa@protonmail.com X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@protonmail.com header.s=protonmail3 header.b="oH/DsTXU"; spf=pass (google.com: domain of polespinasa@protonmail.com designates 79.135.106.118 as permitted sender) smtp.mailfrom=polespinasa@protonmail.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=protonmail.com X-Original-From: Pol Espinasa Reply-To: Pol Espinasa 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 (-) This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------ef2b60a910b74ce84ed7bf31ae5ff7ed96b608ec58cedffc67481676d71f1923 Content-Type: multipart/mixed;boundary=---------------------aa3cac4374a8429640b21f7924e4d850 -----------------------aa3cac4374a8429640b21f7924e4d850 Content-Type: multipart/alternative;boundary=---------------------47b491e447bd1f9d1a81d69a2db42784 -----------------------47b491e447bd1f9d1a81d69a2db42784 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="UTF-8" Hi Garlo, > So, are there any use cases, where testnet5 is needed, and signet cannot = be used?" Yes, as per the BIP text: "However, signet does not allow miners to test th= at their software reliably follows the rules of BIP 54. Testnet 5 provides = a testing environment for this." You want to test the same software that you are aiming to run on mainnet, n= ot a modified version that allows you to solve some PoW puzzles. Also, you = want to test enforcement of consensus rules on block creation and validatio= n, and check interaction with other nodes and miners. Pol On Tuesday, June 2nd, 2026 at 6:23 PM, Garlo Nicon garlonicon@gmail.com wro= te: > > coins being too difficult to mine without a lot of hash rate >=20 > It could be easily solved, if blocks with regular difficulty would replac= e the min-difficulty ones. Because the current rule forces all miners, with= CPUs, GPUs, ASICs, or anything else, to produce a min-difficulty block aft= er 20 minutes. However, there are many different ways to handle that. For e= xample: after 20 minutes, block with any difficulty could be accepted, but = could be reorged by stronger miners later. Then, the network would never be= stuck. >=20 > Or: to discourage mining low-difficulty blocks, the amount of the coinbas= e could be adjusted, proportionally to the difficulty. You don't have hashp= ower, to mine a block with 1M difficulty, and receive 50 tBTC? No problem, = mine million times easier block, get 5k tBTC for testing, and do your tests= . If stronger miner will appear, they will have a chance to reorg you, but = the same is true in testnet3 and testnet4. >=20 > > I wonder if the goal of having a clone of mainnet with worthless coins = is even possible. >=20 > Currently, even signet coins are traded for mainnet BTCs, so probably not= . By the way: I wonder, if there are any tests, where testnets like testnet= 3 or testnet4 are still needed. Because most things can be covered by regte= st and signet. And if someone needs to test mining, then coins can be locke= d to a Proof of Work in many ways, and then, miners could claim them, by so= lving such puzzle. And it works even on mainnet, all you need is using OP_S= IZE on a DER signature, to reach an arbitrary difficulty: https://github.co= m/adambor/btc-pow-locked-outputs/ >=20 > So, are there any use cases, where testnet5 is needed, and signet cannot = be used? >=20 > wt., 2 cze 2026 o 17:05 Saint Wenhao saintwenhao@gmail.com napisa=C5=82(a= ): >=20 > > > I am sharing a BIP draft for a new Testnet5. > >=20 > > Interesting. Does it mean, that testnet4 fixes won't be done? https://b= atmanbytes.github.io/testnet4-softfork/ > >=20 > > > For the Pubkey field, use a recent Bitcoin mainnet block hash. > >=20 > > Do you mean taking the hash of the block, and using it as x-value for a= public key? Then, it could be potentially spendable, if it would be a vali= d secp256k1 point, and people would send more coins to it, or unspendable, = if it would be outside of the curve. For example: > >=20 > > spendable: 0200000000000000000001799c6f72ebe5ebc6b18fd5cdf8bd3697b8d73d= 01b084 OP_CHECKSIG > > unspendable: 02000000000000000000013ac2955a2b6029bc1a86ab4b19e01e8030ce= b0eeb2ae OP_CHECKSIG > > unspendable: 00000000000000000001799c6f72ebe5ebc6b18fd5cdf8bd3697b8d73d= 01b084 OP_CHECKSIG > >=20 > > Also, if the size of the stack push would be different than 33 or 65 by= tes, then it would be unspendable (for example if it would take 32 bytes, l= ike block hashes, and would be followed by OP_CHECKSIG, to invalidate it, o= r if it would start with OP_RETURN). > >=20 > > > Difficulty: 0x1d00ffff > >=20 > > I wonder, how quickly it would be listed on exchanges, and traded. Beca= use historically, new testnets were launched, when that happened. But today= , new coins are listed faster, than they are replaced. Which would give the= creator with any ASIC an incentive, to mine initial 30k or so blocks, keep= them for a while, and then sell for BTCs, when the coin will be listed. > >=20 > > Also, I wonder if testnet5 will have any premine. Previous attempt to c= reate testnet5: https://bitcointalk.org/index.php?topic=3D5543921 > >=20 > > > Testnet 5 also does not apply the difficulty exception rule from Test= net 3 or Testnet 4 requires. > >=20 > > It would be nice to simplify the code, and remove that rule completely = from sources, but it would probably take a while to deprecate testnet3 and = testnet4. > >=20 > > wt., 2 cze 2026 o 13:27 'Pol Espinasa' via Bitcoin Development Mailing = List bitcoindev@googlegroups.com napisa=C5=82(a): > >=20 > > > Dear list, > > > I am sharing a BIP draft for a new Testnet5. > > > People are complaining about Testnet4 being difficult to use, the new= testnet also works as a miner playground for BIP54, we are killing two bir= ds with one stone. > > >=20 > > > You can find the full text to read and comment on in the following dr= aft PR: https://github.com/fjahr/bips/pull/2 > > > Feel free to leave inline comments there or respond here on the list. > > >=20 > > > Pol > > >=20 > > > -- > > > You received this message because you are subscribed to the Google Gr= oups "Bitcoin Development Mailing List" group. > > > To unsubscribe from this group and stop receiving emails from it, sen= d an email to bitcoindev+unsubscribe@googlegroups.com. > > > To view this discussion visit https://groups.google.com/d/msgid/bitco= indev/BrgqDZiNhpEz32-Z9ZX2rrPDE9EUIb62SKT2WsTo-yZtd3gLMLVk6TkO6kLIR96-87Tum= Xqi92l_m1j3xlJr1tcJwG_I3UVDk2NZgXZL8fw%3D%40protonmail.com. > >=20 > > -- > > You received this message because you are subscribed to the Google Grou= ps "Bitcoin Development Mailing List" group. > > To unsubscribe from this group and stop receiving emails from it, send = an email to bitcoindev+unsubscribe@googlegroups.com. > > To view this discussion visit https://groups.google.com/d/msgid/bitcoin= dev/CACgYNOKGG1ht-2deT3jP81BzMrcqYd8tTL-tXeX-Z5sugUngJw%40mail.gmail.com. --=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/= ZjV9FwOf2ShRUaaQWs6LZoHTDjbF8WmfmDptSF3x-V6rNducvUu7IRoXKfz7ZYnkxX9b4r8rIsK= XcpMTgVNA7QS8qALJqCYEVRyaXrmwaXA%3D%40protonmail.com. -----------------------47b491e447bd1f9d1a81d69a2db42784 Content-Type: multipart/related;boundary=---------------------dee901ddec1b8a40f557501a9b65cbfc -----------------------dee901ddec1b8a40f557501a9b65cbfc Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

Hi Garlo= ,

So, are there any use cases, where testnet5 is needed, and signet cannot= be used?"


Yes, as per the BIP text: "However, signet does not allow miners to test th= at their software reliably follows the rules of BIP 54. Testnet 5 provides = a testing environment for this."

You wa= nt to test the same software that you are aiming to run on mainnet, not a m= odified version that allows you to solve some PoW puzzles. Also, you want t= o test enforcement of consensus rules on block creation and validation, and= check interaction with other nodes and miners.


Pol

On Tuesday, June 2nd, 2026 at 6:23 PM, Garlo Nicon garlonicon@gmail.com wrote:

coins being too difficult to mine without a lot of hash rate

It could be easily solved, if blocks with regular difficulty would repla= ce the min-difficulty ones. Because the current rule forces all miners, wit= h CPUs, GPUs, ASICs, or anything else, to produce a min-difficulty block af= ter 20 minutes. However, there are many different ways to handle that. For = example: after 20 minutes, block with any difficulty could be accepted, but= could be reorged by stronger miners later. Then, the network would never b= e stuck.

Or: to discourage mining low-difficulty blocks, the amount of the coinba= se could be adjusted, proportionally to the difficulty. You don't have hash= power, to mine a block with 1M difficulty, and receive 50 tBTC? No problem,= mine million times easier block, get 5k tBTC for testing, and do your test= s. If stronger miner will appear, they will have a chance to reorg you, but= the same is true in testnet3 and testnet4.

I wonder if the goal of having a clone of mainnet with worthless coins i= s even possible.

Currently, even signet coins are traded for mainnet BTCs, so probably no= t. By the way: I wonder, if there are any tests, where testnets like testne= t3 or testnet4 are still needed. Because most things can be covered by regt= est and signet. And if someone needs to test mining, then coins can be lock= ed to a Proof of Work in many ways, and then, miners could claim them, by s= olving such puzzle. And it works even on mainnet, all you need is using OP_= SIZE on a DER signature, to reach an arbitrary difficulty: https://github.com/adambor/b= tc-pow-locked-outputs/

So, are there any use cases, where testnet5 is needed, and signet cannot= be used?

wt., 2 cze 2026 o 17:05 Saint Wenhao saintwenhao@gmail.com napisa=C5=82(a):

I am sharing a BIP draft for a new Testnet5.

Interesting. Does it mean, that testnet4 fixes won't be done? https://batmanbytes.gith= ub.io/testnet4-softfork/

For the Pubkey field, use a recent Bitcoin mainnet block hash.

Do you mean taking the hash of the block, and using it as x-value for a = public key? Then, it could be potentially spendable, if it would be a valid= secp256k1 point, and people would send more coins to it, or unspendable, i= f it would be outside of the curve. For example:

spendable: 0200000000000000000001799c6f72ebe5ebc6b18fd5cdf8bd3697b8d73d0= 1b084 OP_CHECKSIG
unspendable: 02000000000000000000013ac2955a2b6029bc1a86ab4b19e01e8030ceb0ee= b2ae OP_CHECKSIG
unspendable: 00000000000000000001799c6f72ebe5ebc6b18fd5cdf8bd3697b8d73d01b0= 84 OP_CHECKSIG

Also, if the size of the stack push would be different than 33 or 65 byt= es, then it would be unspendable (for example if it would take 32 bytes, li= ke block hashes, and would be followed by OP_CHECKSIG, to invalidate it, or= if it would start with OP_RETURN).

Difficulty: 0x1d00ffff

I wonder, how quickly it would be listed on exchanges, and traded. Becau= se historically, new testnets were launched, when that happened. But today,= new coins are listed faster, than they are replaced. Which would give the = creator with any ASIC an incentive, to mine initial 30k or so blocks, keep = them for a while, and then sell for BTCs, when the coin will be listed.

Also, I wonder if testnet5 will have any premine. Previous attempt to cr= eate testnet5: https://bitcointalk.org/index.php?topic=3D5543921

Testnet 5 also does not apply the difficulty exception rule from Testnet= 3 or Testnet 4 requires.

It would be nice to simplify the code, and remove that rule completely f= rom sources, but it would probably take a while to deprecate testnet3 and t= estnet4.

wt., 2 cze 2026 o 13:27 'Pol Espinasa' via Bitcoin Development Mailing L= ist bitcoindev@googlegroups.= com napisa=C5=82(a):

Dear list,
I am sharing a BIP draft for a new Testnet5.
People are complaining about Testnet4 being difficult to use, the new testn= et also works as a miner playground for BIP54, we are killing two birds wit= h one stone.

You can find the full text to read and comment on in the following draft= PR: https://github.com/fj= ahr/bips/pull/2
Feel free to leave inline comments there or respond here on the list.

Pol

--
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 bitcoind= ev+unsubscribe@googlegroups.com.
To view this discussion visit https://gr= oups.google.com/d/msgid/bitcoindev/BrgqDZiNhpEz32-Z9ZX2rrPDE9EUIb62SKT2WsTo= -yZtd3gLMLVk6TkO6kLIR96-87TumXqi92l_m1j3xlJr1tcJwG_I3UVDk2NZgXZL8fw%3D%40pr= otonmail.com.

--
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 bitcoind= ev+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/bitcoindev/CACgYNOKGG1ht-2deT3jP81B= zMrcqYd8tTL-tXeX-Z5sugUngJw%40mail.gmail.com.

--
You received this message because you are subscribed to the Google Groups &= quot;Bitcoin Development Mailing List" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to bitcoind= ev+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/bitcoindev/= ZjV9FwOf2ShRUaaQWs6LZoHTDjbF8WmfmDptSF3x-V6rNducvUu7IRoXKfz7ZYnkxX9b4r8rIsK= XcpMTgVNA7QS8qALJqCYEVRyaXrmwaXA%3D%40protonmail.com.
-----------------------dee901ddec1b8a40f557501a9b65cbfc-- -----------------------47b491e447bd1f9d1a81d69a2db42784-- -----------------------aa3cac4374a8429640b21f7924e4d850 Content-Type: application/pgp-keys; filename="publickey - polespinasa@protonmail.com - 0x44205759.asc"; name="publickey - polespinasa@protonmail.com - 0x44205759.asc" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="publickey - polespinasa@protonmail.com - 0x44205759.asc"; name="publickey - polespinasa@protonmail.com - 0x44205759.asc" LS0tLS1CRUdJTiBQR1AgUFVCTElDIEtFWSBCTE9DSy0tLS0tCgp4ak1FWjkwKzlCWUpLd1lCQkFI YVJ3OEJBUWRBTmtLQlBRUFFRUGhnWWh4NTJTMnk1WXVxUVFEbGJJczUKdlQxSEtsQUVtN25OTjNC dmJHVnpjR2x1WVhOaFFIQnliM1J2Ym0xaGFXd3VZMjl0SUR4d2IyeGxjM0JwCmJtRnpZVUJ3Y205 MGIyNXRZV2xzTG1OdmJUN0N3QkVFRXhZS0FJTUZnbWZkUHZRREN3a0hDWkJJNVhNaQpUUGNDTEVV VUFBQUFBQUFjQUNCellXeDBRRzV2ZEdGMGFXOXVjeTV2Y0dWdWNHZHdhbk11YjNKblBSSG8KVUFN VldJVnZKZkU2K29CUDZpUFdyODNwNFhNZkE3WUhTMnpPdTZvREZRb0lCQllBQWdFQ0dRRUNtd01D CkhnRVdJUVJFSUZkWjZDVWsybTlqblVwSTVYTWlUUGNDTEFBQVF4VUEvMmVGQ2dIOUx5YW1kSzNp TW1RQgo4REM5M3BYa09YcU9pY1o0bzZLelNQMVNBUURIVzFUR0lOaHJoYWw4dmkxd29PTVFNMTBF bzRMWGlVVXoKT3psZ2xqcFhCTTQ0QkdmZFB2UVNDaXNHQVFRQmwxVUJCUUVCQjBEaURWUDJ3MHBZ YjFZemRaMmVvdlZSCmJyQlNTODRaU3NWVXdwcEFBSkV6Q0FNQkNBZkN2Z1FZRmdvQWNBV0NaOTAr OUFtUVNPVnpJa3ozQWl4RgpGQUFBQUFBQUhBQWdjMkZzZEVCdWIzUmhkR2x2Ym5NdWIzQmxibkJu Y0dwekxtOXlaN3JuMzZMcVg0ZVEKZFRiREdpcGUzVURLNU5Nc0hJZklremRUaFVUNytkenhBcHNN RmlFRVJDQlhXZWdsSk5wdlk1MUtTT1Z6CklrejNBaXdBQUYrYUFQd0ovNGFEN1VDemRFa3lyVUky bU1PbFNOVkJMcWRwZWNSZkVxS0dELy9rQkFELwpjR29La0NjK3k3V0dCbVJ4aTlzNzg2cjZndEY4 T0NxakEveXJqVFNqNmdzPQo9ZmpmVgotLS0tLUVORCBQR1AgUFVCTElDIEtFWSBCTE9DSy0tLS0t Cg== -----------------------aa3cac4374a8429640b21f7924e4d850-- --------ef2b60a910b74ce84ed7bf31ae5ff7ed96b608ec58cedffc67481676d71f1923 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: ProtonMail wrsEARYKAG0FgmofCWkJEEjlcyJM9wIsRRQAAAAAABwAIHNhbHRAbm90YXRp b25zLm9wZW5wZ3Bqcy5vcmckp30TgsreAJIPlbty5T4DvBb4zS3MEHCB35ZK upO45hYhBEQgV1noJSTab2OdSkjlcyJM9wIsAAANWwEAzOsUijxt56zoqxTd NgtP/3zbr4ftwUhPjLrK67nRYKAA/1uzTadyydVqeaG5JXigyJSTpqR6J9LX Yd3sy+DVyFIJ =RrCB -----END PGP SIGNATURE----- --------ef2b60a910b74ce84ed7bf31ae5ff7ed96b608ec58cedffc67481676d71f1923--