Crypto Merchant——Lost Bar and Nightclub

hands up!! 🙋 It is party time for the new season. Move your hips with the DJ beats 😄😄 TravelbyBit’s new merchant – Lost Bar and Nightclub has a lot to offer: great beers🍺, hot rhythm🤘 and gorgeous people🔥🔥🔥. Come and pay with your cryptos.

Email address is changing to ProtonMail!

Blockchain Australia, like most of our members, values using secure protocols such as PGP email and supporting vendors that take crypto payments.

The board has decided to drop Gmail and use ProtonMail for all emails.  Those who have a ProtonMail address will be able to send encrypted email out of the box.

The email address is of course blockchainaustralia [at] We will start to reconfigure all our email aliases to this address.

Your exclusive invitation to Block Engine Demo Day🚩

After 10 weeks of incubation, the 10 startups that were selected to be part of Block Engine, Melbourne’s first blockchain incubator program, will be ready to pitch and present their work. They have been schooled on blockchain technology and business concepts and received guidance from mentors with varied expertise to assist in the development of their products and services.

Join us at Blockchain Centre biggest event ever as the startups pitch their amazing and innovative ideas utilising blockchain technology. Come and meet the teams, and network with blockchain experts and enthusiasts, investors and government representatives in Australia.

Register now through the link below. We look forward to seeing you!

A BIG thank you to our sponsors: Blockchain Global, DigitalX, Nem, Soar Coin & Multilateralmedia!

Crypto Merchant——7th Ave Fish & Chips (Gold Coast)

If your cryptocurrency is burning a hole in your digital wallet, a Palm Beach business is on board to help you cash in for chips🍟🍟🍟The 7th Avenue Fish and Chip Shop is one of two local businesses to join the TravelbyBit network, allowing crypto community to swap  their bitcoin, ethereum, dash or litecoin 👏👏

Satoshi’s Vision Conference – March 23 – 25 2018, Tokyo Japan

I was recently fortunate enough to attend the Satoshi’s Vision conference in Tokyo to learn about recent and upcoming developments in the Bitcoin Cash sphere.

I came away with a very strong impression that the August 2017 hard fork has opened the floodgates on a huge reserve of pent up creative energy that was previously stifled by the high fee environment that the limited blocksize has created on the BTC network. Many times we heard presenters discussing ‘new’ projects explain that they had originally thought of the idea several years before but had abandoned them due to an unworkable user experience.

Scaling, tokenisation and adoption were three key themes discussed during the conference with exciting news coming from Africa and South America demonstrating the real world impact of Bitcoin Cash on people in these markets, and the readiness of nations encompassing more than 300 million people ready to jump onboard with Bitcoin Cash.

For those that don’t know, Bitcoin Cash was a hard fork of Bitcoin which keeps the same blockchain all the way back to the Genesis block but makes the following changes to the network’s functionality:

  1. An immediate increase in the blocksize to 8MB, with an upcoming increase to 32MB
  2. Removal of Segmented Witness (Segwit) transaction formats
  3. Removal of Replace By Fee (RBF) functionality

These changes have already made a huge difference to the usability of Bitcoin Cash. I was actively selling my SAFEWORDS product  in the lobby of the conference and took over 100 payments in Bitcoin Cash using the wallet and never waited more than 1 second for zero conf and never had anyone pay more than 0.5c in fees. The increased blocksize means that there is always space for your transactions to confirm in the next block, and the development teams working on Bitcoin Cash are actively preparing to ensure this remains the case even once mass adoption takes place.

Onto the talks.

There were a total of 29 talks over the 3 days of the conference plus two panel discussions. The talks covered a range of topics including scaling, adoption, network resilience, new functionality and new safety measures for preventing double spending and making the network as safe as possible for real world use on a daily basis.

I have not listed all the talks and encourage interested parties to visit the following youtube link where all the talks have been released for consumption.

Keynote Speech

Roger Ver delivered a powerful keynote speech covering the impact of economic freedom on people and economies, and exploring how a permissionless monetary system will enable new business models and economic activities to flourish.


We saw numerous approaches to scaling discussed, but the most pertinent talks were the following:

  1. Emin Gun Sirer on Scaling Bitcoin x100000: The Next Few Orders of Magnitude
  2. Joannes Vermorel on Terabyte Block for Bitcoin Cash
  3. Vinny Lingham and Ryan X Charles in a Fireside Chat with Ryan X Charles. Scaling Cryptocurrencies: Bitcoin & Bitcoin Cash, A Tale of Two Coins

It is interesting to note that there was wide discussion of real world testing of 1GB and 10GB blocks happening now on a world-wide testnet, which has proven that scaling beyond 1GB is achievable today with modest hardware.


There were numerous talks on network resilience to both structured attacks and fraud against individuals, focussing on the ability of the network to self repair, and ensuring that merchants can trust zero confirmation transactions with any transactions needing instant fulfillment.

  1. Dr. Craig Wright on Bitcoin Network Topology: Small World vs Mesh
  2. Tom Harding on Zero Confirmation Transactions
  3. Peter Rizun on Converging on Consensus


One of the core features being worked on for Bitcoin Cash is network tokenisation. It’s not widely known, but Vitalik Buteryn was originally planning to implement what became the Ethereum network on top of Bitcoin however when the core team found out that he planned to embed token metadata into OP_RETURN outputs they forced a change to limit the amount of data that could be carried to make it impossible. They also disabled a number of crucial opcodes needed to implement novel functions on Bitcoin.

Numerous talks focussed on tokenisation, coloured coins and implementing new functionality on top of Bitcoin which are now possible due to upcoming protocol changes including (but not limited to) the re-enablement of multiple opcodes for mathematical and string manipulation functions, and the increase in the size of OP_RETURN outputs from their current 80 bytes to 220 bytes.

The following talks focus on different aspects of tokenisation:

  1. Emil Oldenburg on coloured coins, discussing a number of different approaches and the advantages and disadvantages of each
  2. Julian Smith talked about bringing Counterparty funtionality to Bitcoin Cash
  3. Panel discussion on tokenisation


There were some amazing talks on adoption, especially in places like Africa and South America, where we learned that there are active efforts in place to on-board 300 million people over the next 1-2 years, which would be an amazing outcome for Bitcoin Cash.

  1. Lorien Gamaroff on Cryptocurrency adoption in Africa
  2. Jerry Chan on How to make Bitcoin Cash the best money in the world
  3. Ryan X Charles on Bringing Bitcoin to a mainstream audience
  4. Boris Javier Barrera Garcia on Integrating Bitcoin Cash to the Retail Market in Colombia

All up, I would say the future is bright for Bitcoin Cash and there is a palpable excitement among developers, makers and users. Please feel free to reach out to me directly for any further information on the conference.

Blockchain roles at AgriDigital

Agri Digital are on the hunt for talented and dynamic people who want to help us bring trust and transparency to global agri-supply chains using blockchain technology.

Last week, AgriDigital was one of three Australian startups recognised at the 2018 AgFunder Innovation Awards, announced during the World AgriTech Summit in San Francisco. AgriDigital was awarded the ‘Most Innovative Supply Chain Startup Series A and Beyond’ and it was amazing to be in San Francisco to attend the Summit and accept the award on behalf of the AgriDigital team who have put in an amazing job to launch our platform last year and to continue to release new features and enhancements for our customers.

Our team has now grown to over 35 and we are looking for more talented developers, marketers and product people to join our us. We are passionate about digitising and de-risking our global agri-supply chains and creating more value from farmer to consumer. If that sounds like you or someone you know, then please check out our website and the @AgriDigital page for the following key roles:

Digital Marketing Coordinator
Digital Product Designer
Mid-Senior Developer
Developer Tester (Full time and short term)
DevOps Manager

Posted on behalf of Emma Weston

Crypto Merchant—— Le Saigon (Sydney)

TravelbyBit has the first merchant in big city Sydney😝🎉🎉 Welcome, Le Saigon 🍹 This fine dining restaurant offers a sumptuous Vietnamese cuisine,  and friendly staff with excellent service😄😄

A great place for the crypto community to indulge in exquisite Vietnamese street food, which will send your taste buds on a journey to Asia.

Episode 6: Blockchain Developer Lucas Cullen

This week on Episode 6 of Crypto Talk, Casey Pyne speaks with Blockchain Australia’s very own Lucas Cullen! Lucas is a blockchain developer currently working on a project called Virtue Poker, a decentralised online Poker Platform. He is on the board of Blockchain Australia which is a not-for-profit Blockchain Association dedicated to developing policy, educating individuals and promoting benefits to SME’s in Australia. They speak about how Lucas managed to get into cryptography, what he is currently working on and the time he made an address to the Australian Senate’s inquiry about Bitcoin!
Listen on

Check out Blockchain Australia and/or become a member!

Blockchain Australia Facebook

Lucas Cullen at the Australian Senate hearing on Bitcoin

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CoinJar – Senior Software Architect


CoinJar is one of Australia’s fastest growing startups and a trusted market leader in the digital currency industry. We build consumer-friendly products with strong focus on security, scalability and usability.

Our Engineering Team is a product-oriented cross-functional team with capabilities in Product Management, Design, Frontend, Backend and Mobile. At CoinJar, you can expect to take ownership in projects from inception and influence the future product directions based on your expertise.

We are hiring a Senior Software Architect who will lead the development of the backend APIs and services. Our backend stack is primarily in Ruby, with some of the newer projects in Elixir.

You will:

  • Lead the effort to standardise our engineering processes and tools with a long-term vision.
  • Design, implement and maintain external and internal APIs and services that are secure, reliable and scalable.
  • Work with engineers, product manager and company management to deliver our product vision and roadmap.
  • Make architectural decisions for current and future backend projects.
  • Share the responsibility of DevOps with the entire engineering team, including database maintenance and deployment.


Essential Requirements

  • You have at least 5 years of experience in software engineering, preferably in Ruby and/or Elixir.
  • You’ve previously designed and built production software with well thought-out architecture and meaningful scale.
  • You have solid experience in TDD/BDD and implementing engineering best practices.
  • You’re passionate about building FinTech products for everyday consumers.

Nice to have

  • You have made contributions to open source projects.
  • You’ve previously worked in an environment with strong security constraints, or you have other web security experience.
  • You have extensive experience with MySQL, Postgres or Redis.
  • You are very familiar with AWS and/or containerised deployments.


  • We are a team of creative and passionate people working to solve challenging engineering problems. We listen to customers, and ship code frequently.
  • You’ll get a laptop on your first day with your preferred configuration. We use macOS or Linux.
  • We have a flexible hours system and you also have the option to work from home 0-2 days a week.
  • We offer employee equity in addition to your base salary, with some of the most generous terms in the market.
  • Fee-free trading on CoinJar!