OpenBazaar Beta Tutorial

Note: This blog post is outdated. Read this article for the latest code.

Should I participate in the beta?

Thanks for wanting to be involved with the OpenBazaar beta. We need the community to tell us what works and what doesn’t, so we appreciate your help.

However, participation in the beta is not for everyone, and not without risks. The platform is far from being complete, and those looking for a fully functional ecommerce platform are better off waiting until the full release, or at least later beta versions. We will be releasing new beta versions each month. The beta is for testing, and while you can engage in real trade, the purpose will be to test the platform, not actually run a store. Consider these points when deciding whether or not to enter the beta:

  • Beta participation will require some level of technical expertise. Installation details below. You will need to install quite a few dependencies.
  • Users are not anonymous on the OpenBazaar network. Your IP is visible to other nodes and is tied to the contracts you sell, purchase, or notarize. Tor will eventually be integrated, but for now privacy-conscious users must either wait for a later release or use a VPN they trust. It is up to each user to comply with local laws and their own conscience.
  • The client and network will be undergoing constant change during beta. You do have the ability to back up your data, but major changes may force a database reset which may cause lost data or other inconveniences.
  • There will be bugs; real bitcoin could be lost. Please be aware that that funds could be lost because of a bug or user error. We discourage users from making large transactions with real coins during beta. We aren’t responsible for lost coins, and we’re going to be too busy developing to be able to assist all the individuals who have coins trapped in multisig or otherwise have problems (though we obviously would like to know about the bug).
  • OpenBazaar is run by part-time volunteers with little funding. Our team is growing, but is still a small group of passionate folks who all have full-time jobs (and most have families as well). We are dedicated to giving the community a platform that finally allows people to trade directly with each other online. This is no small task, and we ask for patience from the community while we fix the bugs and improve the platform. Constructive criticism is very welcome – indeed, it’s a primary goal of beta – but if you disagree with our approach on an issue, feel free to join the team and fix it, or fork the project entirely. Also, we will tend not to respond to basic questions that have already been discussed in our blog posts and documentation.

If you understand these points and wish to participate in the beta, then continue reading. I’ll walk you through how to install OpenBazaar, how to run and use the client, and how to report bugs or make suggestions for improvement.

How do I install OpenBazaar?

Linux and OSX

If you don’t have Git installed in Linux, open terminal (Ctrl+Alt+T) and type:

sudo apt-get install git

If you don’t have Git installed for OSX, download here and install.

Now run:

git clone

Once that’s complete, change directories:

cd OpenBazaar

Run the configure with this command:


If the package doesn’t install correctly, please issue a bug report.

You can start and stop OpenBazaar from terminal with the following commands:

./openbazaar start

./openbazaar stop


Download the Windows binary [signature here], unzip the file and run the OpenBazaar.exe file. In case our site goes down, you can get a torrent with this magnet link.

How to run

It may take a few moments to start OpenBazaar, since on the first run it is generating keys pairs for you to use. The program will automatically open a browser with the right address to view the network.

You should see a message which gives you warnings about using OpenBazaar during beta. Read them carefully.

Now go to your settings, and fill in whatever details you like in the “Store Info” tab.

Store Info

If you want to give other users more trust that you are an honest player in the network, you can participate in a Reputation Pledge. Please note this burns the coins, so during beta we recommend just a very small amount to test with.

In settings, if you go to the “Communication” section on the left, you can put in your email address or Bitmessage address in order to communicate with others on the network.


Once you’ve finished your settings, go to the “Backup” tab and create a new backup. This will store your keys and information in case you need to import them later. Keep those keys safe as if they were bitcoin private keys.


Now you’re ready to use OpenBazaar. You can search for products or stores with the search bar up top. If you find a test product you’d like to practice on, or you want to get a real product, open up the item and click Next. If you see a warning that you don’t have notaries, then go to a store you trust (for testing you can use the seeds), click on “Services,” then “Make Trusted Notary.”


Once they’re trusted, you can go back to a seller’s store and purchase their products, and select the notary you chose.

In early beta, there probably isn’t much to find on the network yet, so you should feel welcome to put out your own contracts. Open the “Contract” tab beneath the search bar. Click “Add Contract” and fill in the details. If this contract is just a test, please select note “Test” in the title and description so that others don’t think your offer is a real one.

test product

Once you find an item you want, select your notary and purchase it. Then go to your “My Purchases” drop-down menu under the Orders tab.


Open up your orders, and note that you need to pay the amount listed to the address displayed. This is funding the multisig which needs two of three parties to release. You can pay with your smartphone wallet using the QR code, or hit the “Pay in your Wallet” option to open your Bitcoin wallet and fill out a payment request. Once you’ve paid, be sure to mark the “Mark as Paid” option.


The seller looks at the “My Sales” drop-down menu under the Orders the orders tab, verifies that the buyer has paid (this isn’t automatic yet, so please check the hyperlink for payment), and then ships the product if the multisig has been funded correctly. Once shipped, they mark “Request Payment” and enter their bitcoin address where they want to receive the funds.

Tips and Tricks

Here are a few things that might help you when using OpenBazaar.

1. Be patient. Items such as stores, products, or contracts you’ve published may take a little while to register. Wait a few seconds longer than you think you should need to, and then refresh your page and try again. If it still doesn’t work, then report a bug. Also, finalizing a transaction may take longer than you expect as well.

2. Don’t trust “Paid” as a seller. Right now, the buyer selects “Mark as Paid” to let the seller know when to ship the item. However, they can mark as paid without having actually paid. The seller needs to check the multisig address in the order (which is already hyperlinked) to make sure they actually did pay. In the future the client should check automatically, but for now, seller beware!

3. If you experience trouble connecting to other nodes, stop your node, and port forward 12345 on your router (both TCP and UDP), then try again.

4. We’ll be making frequent changes to the code, so occasionally stop your node, run ‘git pull’ in the OpenBazaar folder to get the most recent changes, and start the node again.

Notaries and Arbitration

If you are beta testing, please familiarise yourself with the concept of notaries and arbitration on OpenBazaar here. In short, the roles for both agents are:

  • Notaries: to witness contracts between merchants and buyers using a cryptographic digital signature, and manage a bitcoin signing key for a multisignature escrow address in the event of a dispute between the merchant and buyer
  • Arbiter: to resolve a dispute between a merchant and buyer after careful examination of evidence presented by both parties

For reasons delineated in the article reference above, these roles should be handled by separate agents. However, only notaries are currently supported. The arbitration market isn’t ready yet.

If you want to become a notary to help out the network, you can do this in the settings under the notary tab, by checking the box “Make me a notary.” Please only become a notary if you are willing to:

  1. Automatically witness contracts for other parties
    • This generally means having your node online close to 24/7
  2. Create and sign multisig transactions for all parties
    • This means you must have experience with multisignature transactions and are a responsible key manager
  3. Possibly handle disputes between parties
    • If all goes well, the notary is required to do very little as the client manages contract signing and key creation in the background
    • In the event of a dispute, the notary must be able to respond to the parties rapidly (i.e. within 24 hours at a maximum)
    • As the arbitration market is not supported just yet, the notary will also need to wear the hat of an arbiter

Becoming a notary requires you to have some technical knowledge of how to sign, verify, and broadcast multisignature transactions. If you do not know how to do this confidently, please do not become a notary just yet. We expect that notaries will charge a fee for handling disputes or releasing funds from the multisignature escrow address for other reasons. Part of beta will be watching how the notaries are rewarded.

Future releases will allow the merchant and buyer to come to a consensus in the selection of a notary to minimise the risk of collusion. If you are a merchant trying to sell real goods for bitcoin, we again urge you to do so cautiously.

How do I submit a bug report?

There are multiple ways to submit bug reports, depending on what you prefer. If you’re a developer, or are otherwise knowledgeable about Github, you can open an issue there directly.

If you’re not a developer or don’t want to use Github, we also have a thread in our subreddit for bugs. Again, please follow the suggested format in the post.

We’d like bugs submitted for any problems you run into, but if you see someone else reporting the same bug, you can just make a post noting that you have the same issue (if your OS or browser are different, let us know).

Users can feel free to drop into our IRC room at #openbazaar on Freenode (if you don’t have an IRC client use this link). If it’s an installation issue we should be able to walk you through getting your node running properly.

How do I make suggestions for improvement?

We don’t only want your feedback if something is broken; the point of the beta is to hear from the community on what they want in a peer to peer online trading platform. We encourage users to give us their thoughts on how to make OpenBazaar better.

Again, you can open an issue on the Github, though we ask that it is specifically related to the code.

For Redditors, we have a thread for suggestions as well.

Begin testing

Thanks for reading, and testing. We’ll be releasing a new beta version each month until we’ve got it running smoothly, then will release a full client. We’ll be doing fixes along the way, so check back occasionally to see if that bug you submitted got fixed. Lastly, come join us on our IRC on Freenode at #openbazaar if you need help, or just want to chat.

Read More

Proof-of-burn and Reputation Pledges

OpenBazaar uses a particular implementation of proof-of-burn that we call Reputation Pledges in order to help build trust among members of the network. This post will give you a quick overview of what this means, why it’s necessary, and how you can use Reputation Pledges yourself.



Proof-of-burn is a term used to describe the intentional and provable destruction of bitcoin for a particular purpose. When engaging in a proof-of-burn, funds are intentionally sent to an address that is unspendable, meaning those coins are gone forever.

Why would someone destroy bitcoin on purpose? In the past, this has primarily been used to bootstrap one cryptocurrency from another. Distribution of a new cryptocurrency can be determined by people burning their coins in exchange for the new currency, thus showing they are invested. For an example of this, read through Counterparty’s explanation of their proof-of-burn.

Reputation Pledges

OpenBazaar implements proof-of-burn in a different way. On the OpenBazaar network, users can choose to be pseudonymous, meaning you don’t know their true identity. As such, it can sometimes be difficult to determine if they are trustworthy or should be avoided. A reputation system is important to help inform the network of which participants have acted honestly in the past, and which haven’t. There are several facets to the OpenBazaar reputation system, which is still being built, and you can read about the overall system here.

One part of this system is Reputation Pledges. This means that a user has chosen to prove their commitment to their OpenBazaar identity by burning a certain amount of bitcoin. The act of burning coins shows the network that the user is committed to their identity because they’ve now expended resources on it, and if they incur a negative reputation then those resources will have gone to waste.

To help understand the importance of this, consider a similar example in the real world. Travelling salesmen were often treated with skepticism by the inhabitants of the towns they visited. Apart from the annoyance of their house calls, why would people be reluctant to purchase items from travelling salesmen? Two reasons. One, they cannot rely on reputation to determine if the salesman is selling quality merchandise or not; the other customers of this salesmen aren’t located nearby. Two, the salesman has nothing to lose if their products turn out to be poor quality – there is no reputation damage if they leave, and since there is no brick-and-mortar store they’ve invested in, they can simply peddle their wares elsewhere.

You can think of it similarly to OpenBazaar users. If there’s no cost to creating a new identity, or if there is no brick-and-mortar store to keep you in one place, you can simply abandon an identity once it has received negative feedback. Obviously online, you don’t have a physical store, but a Reputation Pledge is a similar concept: you’ve invested resources that create an incentive to keep a good reputation and impose a significant cost for abandoning that reputation.

How it works

Engaging in a Reputation Pledge is simple. I’ll have a complete walk-through of this very soon, for now you can view the Reputation Pledge in the “settings” tab.

Read More

OpenBazaar State of the Code; August 2014

To help keep the community aware of OpenBazaar’s progress, I will occasionally publish an overview of where we are at in the project. Here’s our first “State of the Code”.

Beta Release

Two months ago at the Bitcoin in the Beltway Conference I stood in front of the audience and presented our development roadmap for OpenBazaar. The first major milestone was an ambitious one: Beta Release at the end of August.

Brian presenting at Bitcoin Beltway - Image: Magnus
Brian presenting at Bitcoin Beltway – Image: Magnus

When I announced we would be releasing the first beta version of the product I envisioned a fairly small scope and was leveraging the teamwork of just a few individuals. Fortunately, since then our team has grown in size and expertise and that scope has grown. This will make OpenBazaar much more viable as a scalable and powerful solution. Therefore, we have decided to migrate from a simplified Beta then Full Release schedule to a much more nimble and continuous development process. This means that instead of simply launching a product and hoping the community finds it valuable, we are now able to continually work on the development and incorporate feedback from the community as we move forward.

If you’ve been looking forward to testing OpenBazaar out, don’t worry: we will be releasing a version of the software that can be installed on Mac OSX, Linux and Windows on August 31st. As it’s the first Beta, it will be fairly limited in functionality and Sam Patterson will be posting a more detailed outline of this when we release.

Other updates

I won’t even try to list all the developments and progress we’ve made since this project began. To summarize, we have been encouraged by the community support displayed, which has increased our appetite for making this project succeed.

Team Member Updates

OpenBazaar Team Members
OpenBazaar Team Members

We are so excited to have so many great people helping out the project, and to see the number of contributors continue to increase. All of our team members participate for no payment and have contributed a massive amount of personal effort and time to get us where we are now, and for that I know I am grateful and I am pledging as much as I can to the project as well. If you know of others who are interested in assisting, please get in touch with us at so that we can help you figure out where it would be possible.

Formalizing the Organization

Our team is currently looking at different ways to legitimize the project in ways that would benefit the community as a whole. We are not quite sure how this will happen, but rest assured our principles of zero fee operation and openness will remain. That being said, we are considering ways to bolster development and operational support in ways other than a funding address. We will let everyone know if any decisions are made one way or another.


Over the last few months we have received many emails and messages from businesses small and large, who want to start using OpenBazaar as soon as possible.

As we approach the Public Release of OpenBazaar at the end of the year (notional), we will be working with groups to line up some Day 1 merchants, notaries, and arbitration participants. If you are interested in this process please contact us at so that we can get you on our follow up list and help you find out more about how this will work.

We have also been approached daily by almost every altcoin outside of Doge to incorporate it into the project. For the record, we aim to support altcoins capable of multisignature transactions. However, we have no definite timeline for altcoin support to give at this time.

Many of you have donated to the cause (over 5 BTC raised), contributed to our development or written articles or tweets about us and we thank you graciously for all of that.

Final Comments

Overall, the project is heading in a great direction. With the Bitcoin community’s help (and patience), we can deliver a product that will change how we use our Bitcoin for the better. Our goal remains simple: provide an easy to use application that anyone in the world can use to spend Bitcoin (or other crypto-currencies) on goods and services without an intermediary. There is no one way to accomplish this goal. We hope to innovate and inspire others to follow our lead in creating more decentralized services so that we can one day live and interact with each other with true freedom.

Brian Hoffman
Project Lead

Read More