Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id F34F33EE for ; Thu, 26 Jul 2018 13:43:40 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-it0-f53.google.com (mail-it0-f53.google.com [209.85.214.53]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 938C86D6 for ; Thu, 26 Jul 2018 13:43:40 +0000 (UTC) Received: by mail-it0-f53.google.com with SMTP id e14-v6so2787565itf.1 for ; Thu, 26 Jul 2018 06:43:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=blockstream.io; s=google; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=eUFvePE2vjgHFdUGhO9iGiF2Tc8bxwAXp9sh2CDi9HQ=; b=c+MoVe9vVoV2FSz2b+fDKJSEu2b+2Mj0zzBGLA7Uoq5bp1vRA4ZOQOX2rgKr3XG+yk iCc46lxp0sQWckY7yduQIfVEI1bGEiSIsxn8ydhJ3DCU/koSana8VxvSOdKuzbYylGh3 EFNyxpSLYxA2JFRpgqMYj0Exurkrzm+NBnvYk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=eUFvePE2vjgHFdUGhO9iGiF2Tc8bxwAXp9sh2CDi9HQ=; b=nSTbmG9ODmVwDDlzlICHfP6rrWiHp6TWvKfBTtBtYP+poH/tcXRbm4Wmb5YrXyvrBT BsEDaNmg+YfGUPgaPxUWBaIgf9K9xUxEZ5o1ReJOO5Ui99fEiXW3PduwwfG4z+AUPH8y +OIpwPduOUkDIzREv08VlgmJIpUhLOEKX4xfOhoYZaABZNoG0zRxt3HZ/DCto1x0lt1R bJcESNsX5StMFMx6DkIF3a3jDP2R/xgSBjVyH2379yld03b+arq1E4Ekx163nB6nUzXX NgXZEhknI0CK9yWc1qZ8Q3X+PKvJdLC5soYjHSo1N3QvIdDfJGq/7Fnww8uVPh+6hnEM bsfg== X-Gm-Message-State: AOUpUlGXIoWzK5N7bcGWlVmjbqhLgwBL9QyMb07XRcYNXE1QMDlYLOYQ zlevIdEd1hyOM7rKHSqaMjp3KQ6dzIanfsZcJ0ltag== X-Google-Smtp-Source: AAOMgpdAMtB6/a9j0+dpz6P1gpl1Q6FVenPZUSzedkvdP01KbsGwbwAWI+JfdUxUhjTd5smppupTykD4GBcYTi4Phm0= X-Received: by 2002:a24:b54b:: with SMTP id j11-v6mr1926117iti.79.1532612619890; Thu, 26 Jul 2018 06:43:39 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a02:6949:0:0:0:0:0 with HTTP; Thu, 26 Jul 2018 06:43:19 -0700 (PDT) In-Reply-To: References: From: "Russell O'Connor" Date: Thu, 26 Jul 2018 09:43:19 -0400 Message-ID: To: Pieter Wuille Content-Type: multipart/alternative; boundary="000000000000c989ca0571e72e39" X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HTML_MESSAGE, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Cc: Bitcoin Dev Subject: Re: [bitcoin-dev] A BIP proposal for segwit addresses X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Protocol Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Jul 2018 13:43:41 -0000 --000000000000c989ca0571e72e39 Content-Type: text/plain; charset="UTF-8" Hi Pieter, > The *human-readable part*, which is intended to convey the type of data, or anything else that is relevant to the reader. This part MUST contain 1 to 83 US-ASCII characters, with each character having a value in the range [33-126]. HRP validity may be further restricted by specific applications. You should also add to this section that the HRP should be lowercase. Since Bech32 forbids mixed-case and otherwise converts everything to lowercase, it is good to warn upfront against using uppercase in the HRP. I know the BIP is marked as final, but this wouldn't be a normative change. --000000000000c989ca0571e72e39 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi Pieter,

> The human= -readable part, which is intended to convey the type of=20 data, or anything else that is relevant to the reader. This part MUST=20 contain 1 to 83 US-ASCII characters, with each character having a value=20 in the range [33-126]. HRP validity may be further restricted by=20 specific applications.

You should also add to = this section that the HRP should be lowercase.

Sin= ce Bech32 forbids mixed-case and otherwise converts everything to lowercase= , it is good to warn upfront against using uppercase in the HRP.
=
I know the BIP is marked as final, but this wouldn't be = a normative change.
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