TL;DR: Crypto Dev Digest (CDD) is a regular column, documenting cryptocurrency development, highlighting the projects and persons working under the hood. Bitcoin Unlimited flexing development muscle is all the talk in BCH circles; it’s a self-described organization maintaining an open-source Bitcoin client to foster competing implementations. Simpleledger.info now supports SideShift.ai. BitcoinCash.org launches a developer portal. Roger Ver gets a ProgPOW “fun” update, and much more in this digest installment.

Bitcoin Unlimited Flexing

The Bitcoin Unlimited (BU) team is beginning to assert itself more, as lead dev Andrew Stone recently took up the issue of quasi-consensus rules getting in the way of furthering permissionless-ness. Not too long after, BU’s Chief Scientist, Peter Rizun, posted about increasing chained mempool transaction limits to 500, … presumably to at least claim a relatively longstanding bounty.

That was followed by the release of BU’s version 1.7.0, in time for compatibility with the upcoming November BCH upgrade. Features include 100x better CPFP code and mempool sync based on Graphene. Still more news came when the team revealed it would use its windfall of 40 BCH, donated by the exchange OKCoin, to fund DoubleSpend proofs.

"Quasi-consensus rules are an impediment to permissionless innovation."

Bitcoin Unlimited's Lead Developer @GAndrewStone writes about this important area which is relevant to #BitcoinCashhttps://t.co/qr2ycsN42c — BitcoinUnlimited (@BitcoinUnlimit) October 9, 2019

Increased Chain Mempool Transactions Limit

We're Increasing the Limit on Chained Mempool Transactions to 500 (+ a Brief History of Where the Limit Came From)https://t.co/Fc4Abb6sua (Hint: it was a solution to a problem caused by a solution to a different prob that wouldn't exist had the block size been raised in 2015) — Peter R. Rizun (@PeterRizun) October 9, 2019

BU 1.7.0 Released

BU 1.7.0 Features

Bitcoin Unlimited (@BitcoinUnlimit) 1.7.0 has just been released! This version is compatible with the upcoming #BCH Nov '19 upgrade Other than that brings also a bunch of interesting features: – 100x better CPFP code

– mempool sync based on Graphenehttps://t.co/xMDiFRDGaz — sickpig (@sickpig) October 11, 2019

BUCash-1.7.0.0 Release Notes and Overview

Bitcoin Unlimited's latest #BitcoinCash protocol compatible full node client BUCash-1.7.0.0 is available for download: https://t.co/YPjLnFA4Za Release notes:https://t.co/1Wspwv9gKa

Overview:https://t.co/CSY3DOKu8u Thanks to the BU Dev team 🍾 pic.twitter.com/4NJov7wlfS — BitcoinUnlimited (@BitcoinUnlimit) October 11, 2019

Ubuntu PPA repository Updated

Bitcoin Unlimited (@BitcoinUnlimit) Ubuntu PPA repository has been updated, now serving version 1.7.0 Since this update ppa repo is providing also ElectrsCash (ver 1.0, thansk to @dagur for all the hard work on that)

https://t.co/izKebs4F5X — sickpig (@sickpig) October 14, 2019

Funding DoubleSpend Proofs

Bitcoin Unlimited Proposes to Use OKcoin Donation to fund DoubleSpend Proofs. @OKCoin @leedecks https://t.co/OlLdGwATi7 — Peter R. Rizun (@PeterRizun) October 14, 2019

BU Improvement Proposal (BUIP)

Recently a leading exchange @OKCoin donated 40 BCH to Bitcoin Unlimited for development in #BitcoinCash.

We appreciate such generous actions to advance the coin, so a BU Improvement Proposal is now raised for membership approval to fund DoubleSpend Proofs:https://t.co/mxW9NoFB0m — BitcoinUnlimited (@BitcoinUnlimit) October 14, 2019

Simpleledger.info Supports SideShift.ai

Happy to announce https://t.co/SD3WFT2t8B now supports https://t.co/Kq8jWIe5rj, you can try it on SPICE, USDH, and SAI today. Clicking the SideShift icon will bring up a pane allowing you to instantly buy SLP tokens. You can see it in action here:https://t.co/EMqOWdsKTs — blockparty_sh (@BlockpartySh) October 9, 2019

Developer Portal Launched

https://t.co/XyRCmfm8VC is launching a developer portal aiming to help developers find the tools they need to build on #BitcoinCash. Find it at: https://t.co/GVAtXCMyhE — Corentin Mercier (@merc1er) October 10, 2019

Roger Ver Filled-in on ProgPOW “Fun”

So I got to meet @rogerkver and fill him in on all the Ethereum ProgPOW "fun". Thank you for everything you do, Roger. I would love to build ETC <-> BCH bridges. Thanks for pointing me at this event, @nishantsharma87! pic.twitter.com/uO1jI0tKJN — Bob Summerwill (@BobSummerwill) October 10, 2019

slp-cli-wallet Sweeps, Bug Fixes

slp-cli-wallet v1.7.5 adds the ability to sweep a paper wallet that contains SLP tokens! This is an alpha release. Please try it and provide feedback:https://t.co/I6n5sBLzwb https://t.co/Dmtw3OhCjk — Chris Troutner (@christroutner) October 11, 2019

slp-cli-wallet v1.7.8 fixes bug that was preventing the sending of tokens on testnet. Use slp-sdk examples to create testnet tokens, then send them to your slp-cli-wallet.https://t.co/I6n5sBLzwb https://t.co/SyVrHbyLeC — Chris Troutner (@christroutner) October 14, 2019

Bitcoin Security vs. Declining Block Subsidy

Finally done! @_prestwich @bcmakes and I wrote a research paper on Bitcoin's security model and the declining block subsidy. This journey challenged everything I thought I knew about the economics of mining and Bitcoin in general.https://t.co/WpSVkPxWbj — Hasu (@hasufl) October 10, 2019

Offline BCH Smart Contract Payments

Offline payments for Bitcoin Cash using smart contracts! Because cash can be sent without being online.https://t.co/1MqP8o39oe — Tobias Ruck (@TobiasRuck) October 13, 2019

Groundbreaking! Unless my eyes deceive me, @TobiasRuck Just solved one of the most beguiling problems in Bitcoin: how to have a wallet that never has an internet connection or knowledge of spendable UTXOs This allows your wallet to be contactless or chip smart card form factor https://t.co/rZ2Msao31A — Ⓥin Ⓐrmani (@vinarmani) October 13, 2019

Bitcoin ABC 0.20.4 Released

Bitcoin ABC 0.20.4 has been released! This release includes bug fixes, new `createwallet` RPC command, and more. Download it here: https://t.co/TdPaweN3Vs #bitcoincash #bch #bitcoin — Bitcoin ABC (@Bitcoin_ABC) October 16, 2019

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DYOR: CoinSpice is your home for just spicy crypto things. We’re not affiliated with any cryptocurrency project or token. Each published piece is intended for information purposes only, not investment advice and not in the hope of impacting speculative markets. There are plenty of trading sites and coin-specific advocacy journals out there, we’re neither. CoinSpice strives for rigorous accuracy in our reporting. Information presented here is contingent usually on a host of factors, and the ecosystem moves fast — prices change, projects change, and at warp speed. Do your own research.

DISCLOSURE: The author holds cryptocurrency as part of his financial portfolio, including BCH.