[Bitcoin-ml] BitPay's new p2pkh / p2sh address versions and future considerations for Bitcoin Cash addresses

Tom Harding tomh at thinlink.com
Mon Sep 25 00:03:25 UTC 2017


Given

- The limited supply of unique first-characters for addresses, and
- That these characters are non-human-readable ("1" = bitcoin)

... I'm starting to think it's superior to take this opportunity to
encourage broader expectation of providing, and expecting users to
supply, a URI prefix in all cases.


On 9/21/2017 1:33 AM, Tom Zander via bitcoin-ml wrote:
> On Sunday, 17 September 2017 00:26:50 CEST freetrader via bitcoin-ml wrote:
>> While a minimalistic address version change such as BitPay's may be useful
>> as an interim measure, it should be noted that there is work underway on
>> implementing Bech32 address support.
> I would not call it an interim measure, it is the only option on the table 
> and it is a good one. After investigating the matter, this is what I found:
>
> * Private keys are not affected.
> * Public keys are not affected.
> In actual fact, nothing on the actual blockchain is affected.
>
> * A Bitcoin-Cash address is at its raw form just a 160-bits hash. We can 
> turn that into a user-readable string using the traditional base58 method.
> The BitPay proposal changes only this last step, setting a different version 
> on that conversion from raw data to user visible.
>
> This means that your software can convert from BCC to BTC types on the fly, 
> it can read the BCC type with minimal code-changes.
>
> The effect we have is real, BTC clients do not accept the new string, and as 
> such when BitPay generates a QR code or base58 address, it will not be 
> possible to input that into your bcore client.
>
> As of upcoming version 1.3.7 Bitcoin Classic supports this new address  
> version, at least for p2pkh, and as such payments to BitPay can be made from 
> Classic.
>
> I would invite all other players in the Bitcoin Cash sphere to follow suit. 
> It is a rather minimal change with maximum effect.



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