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Messages - cryptos4pz

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Always remember — the original Bitcoin forked into 2 different coins: Bitcoin Core/SegWit & Bitcoin Cash. Only Bitcoin Cash preserves the original principles of bitcoin, even though the other coin took the name Bitcoin BTC.


Does Bitcoin Cash's CashAddr and Bitcoin Core's Bech32 use fundamentally different checksums (polymod)?

Copied from discussion on r/btc (Feb 12, 2020):

Reviewing the spec for CashAddr and the spec for Bech32, the checksum methods seem to be fundamentally different. Am I reading this correctly?

CashAddr sample code:

```c uint64_t PolyMod(const data &v) { uint64_t c = 1; for (uint8_t d : v) { uint8_t c0 = c >> 35; c = ((c & 0x07ffffffff) << 5) ^ d;

    if (c0 & 0x01) c ^= 0x98f2bc8e61;
    if (c0 & 0x02) c ^= 0x79b76d99e2;
    if (c0 & 0x04) c ^= 0xf33e5fb3c4;
    if (c0 & 0x08) c ^= 0xae2eabe2a8;
    if (c0 & 0x10) c ^= 0x1e4f43e470;

return c ^ 1;
} ```

Bech32 sample code:

python def bech32_polymod(values): GEN = [0x3b6a57b2, 0x26508e6d, 0x1ea119fa, 0x3d4233dd, 0x2a1462b3] chk = 1 for v in values: b = (chk >> 25) chk = (chk & 0x1ffffff) << 5 ^ v for i in range(5): chk ^= GEN if ((b >> i) & 1) else 0 return chk

I ask because I was trying to put together a PR to pycoin to add CashAddr support. I got it all done then noticed that my checksums seemed problematic. Best I could find, the polymod functions are incompatible between bech32 libraries and cashaddr libraries.




General Discussion / List of Ecosystem Contacts
« on: February 05, 2020, 06:20:40 PM »
To better facilitate information flow here is a list of ecosystem contacts in roughly alphabetical order. Please comment for additions, modifications etc. This is a non-exhaustive list.


Amaury Séchet 
Bitcoin ABC lead developer 
Primary interest/focus: full-node software development 
Preferred contact: reddit u/deadalnix

Andrew Stone 
Bitcoin Unlimited lead developer 
Primary interest/focus: full-node software development 
Preferred contact: reddit u/gandrewstone

Primary interest/focus: conceptual protocol development (consensus, scaling etc); BCH web apps 
Preferred contact: reddit u/cryptos4pz, [email protected] 

George Donnelly 
Bitcoin ABC Business Development Manager / BCH Latam / Panmoni 
Primary interest/focus: BCH adoption in the developing world, esp Latin America 
Preferred contact: [email protected]; +573218423668 

Hayden Otto CEO, Conference organizer 
Primary interest/focus: business development 
Preferred contact: [email protected]

Jiang Zhouer
Primary interest/focus: mining, business development
Preferred contact: [email protected]

Jonald Fyookball 
Electron Cash lead developer 
Primary interest/focus: SPV wallet development 
Preferred contact: reddit u/jonald_fyookball
Owner, Moderator r/btc 
Primary interest/focus: business development; investment 
Preferred contact: reddit u/memorydealers, [email protected]

Crescent Cash Wallet lead developer 
Primary interest/focus: wallet development; and bitcoincashj; BCH FOSS 
Preferred contact: Twitter @pokkst
Projects / Resources

Dev chat: (?) 
Contact page: 
Dev chat: 

Bitcoin ABC 
Dev chat:

Bitcoin Cash Node
Dev chat:
Bitcoin Unlimited 
Dev chat: 

Bitcoin Verde 
Dev chat: 

Dev chat (?)

Electron Cash 
Dev chat: 

Flowee The Hub 
Dev chat: (?)   

Discussion / News / New Bitcoin Cash Specification Documentation Released
« on: January 21, 2020, 03:34:03 AM »
The largest organized and funded effort to produce a documented Bitcoin Cash protocol specification that is comprehensive, useful, up to date and easy to engage with has been released! A big thanks to Josh Green of Software Verde for leading the legwork and BitcoinUnlimited for funding this initial product.

Links: (main repo)

Developer write access: create an account and contact Bitcoin Verde telegram. Another venue for finding the spec is

Announcement & discussion:

"Hello guys,

I'm the guy who usually shares information about meetups, talks and new merchants accepting BCH in Maracaibo, Venezuela. As most of you already probably noticed, the merchants I on board use a printed QR code stand to receive payments. Some users asked me where to get the format or a good website for priting BCH's QR codes, but in this case I made it myself.

Since some of you asked me about them because you want to start on boarding new merchants with the same method I do..."



General Discussion / $200 Million BCH Ecosystem Fund Announced!
« on: December 14, 2019, 05:48:33 AM »
" is planning a major step toward promoting the growth of the BCH ecosystem. A $200 million fund will empower developers to offer new capabilities to bitcoin cash users as well as give institutional investors a chance to capitalize on the future of the cryptocurrency".


More info:

A minimarket from Maracaibo Venezuela started accepting Bitcoin Cash as payment method. Now all type of basic need products available with Bitcoin Cash (BCH) in a well located place called “Campus Café” 🇻🇪 From eggs, milk, cheese, rice to Coke, chocolate, candies and more now available with BCH! - February 24, 2020


[VIDEO] A new merchant started accepting BCH in Maracaibo, Venezuela; This time is a “Chicha” place (very popular drink amongst Venezuelans) — this one is the biggest one in the city! Now they accept Bitcoin Cash for their products 💪 Adoption growing faster in this city. - January 20, 2020

New Maracaibo, Venezuela meetup! - December 27, 2019

[VIDEO] Paying with Bitcoin Cash in a new merchant 💪🔥 The restaurant - bar is called Bibas, in Maracaibo, Venezuela. We gave them their printed QR code today and ready to accept payments! - December 10, 2019

[VIDEO] New merchant in Maracaibo, Venezuela. The place is called “Audio Music” it’s a cafe and music store. It started accepting BCH today! More photos coming soon on the twitter account @cypherbits — new day, new merchant! Tomorrow we will have another one 💕 - December 9, 2019

Explaining BCH to newcomers in our last meetup at Maracaibo, Venezuela! People had the option to pay with BCH. I personally did a 23 USD payment for beers and pizzas 🤙🏻 Want to support us for future events? Send us a private message 🔥

[VIDEO] Paying with Bitcoin Cash at our meetup in Maracaibo, Venezuela 🇻🇪. We paid pizzas and drinks with Bitcoin Cash! I have a bunch of photos coming soon! 🤙🏻 TRUE P2P electronic cash! - December 5, 2019

[VIDEO] More adoption videos: Paying hamburgers and beers with Bitcoin Cash (BCH) in Maracaibo, Venezuela 🍔🍺 - November 2019

A new merchant is accepting Bitcoin Cash (BCH) in Maracaibo, Venezuela 🔥 We provided them with a sticker and their QR code printed 👍 People can pay with their pizzas and beers with BCH now!

[VIDEO][English] New Maracaibio merchant "Gioia" is accepting Bitcoin Cash (BCH) and BTC payments!

New talk in Maracaibo, Venezuela just finished! 20 people assisting and new more users know how to use Bitcoin Cash for payments

[VIDEO] Video from the Bitcoin Cash talk at Maracaibo Venezuela - Over 200 taxi cabs - October 2019

General Discussion / Jihan. WU. IS BACK
« on: November 20, 2019, 03:09:49 AM »
Bitcoin Cash Surges Double Digits as Jihan Wu Re-Assumes Bitmain Head Leadership Role

TL;DR: According to an internal email, leaked today, cryptocurrency mining giant Bitmain is being led again at the executive level by co-founder Jihan Wu. The translated notice to employees explains Wu has dismissed fellow co-founder Micree Zhan Ketuan in “all roles” and “effective immediately.”

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