Duniter dealing with Community integration

client Sakia:

This tutorial will cover the following steps:

  • Installing Sakia
  • Creating your personal identity
  • Connecting to the network
  • Joining a community

And in a second time, one of the most important action in Duniter:

  • Certificating other people (both members and non-members)

Feel free to leave comments if you encouter difficulties, have suggestions, or anything else.

Have fun! :slight_smile:

Installing Sakia


Download123 the one that fits your own environment.

Here, we will consider the case of Windows (.exe) version that does not rely on any external library. Windows version can be used « as is ».


Once download is finished, extract the resulting file. Inside the folder, you will find a sakia.exe. To launch Sakia, simply click on this file. You should land on the above screenshot of Sakia home screen.

Creation of your personal identity

In the menu, click on New account:

In the screen that showed up, you will have to enter your personal identity name. In this example, I will put mine « m4oul ». But you have to choose your own.

If you choose an already used UID, you won’t be able to join the community. So ensure not to collide with someone else’s UID.

You should now have the following screen:

Click on « Next ». You will now be asked for data to constitute your personal keyring. You will be asked for 2 parameters:

  • Salt: we advice you to choose your personal e-mail as value for this field. But you can put any other value: it only has to carry enough entropy to avoid key collision. Typically, your personal e-mail is a good choice, added to the fact it is easy to remember.
  • Password: here, choose a very strong password, so no one can find it. This password can’t be changed thereafter, so choose it carefully.

N.B.: you will have to remember these 2 values, salt and password. The keypair generated from these values won’t be saved anywhere. It will only e in your head!

You can click on « Show public key » to see the resulting key generated from your salt and password.

This isn’t my real public key, it is just for our example. :wink:

Click on next to generate both your key and your personal identity.

Connect to the network

Right now, you should be on the following screen:

To connect to the network, click on Add a community button.

In the next screen, you will have to enter a network address + port. For our example, meta_brouzouf, I advice you to connect to a node I own:

Click on Register your account.

You will be presented a new screen where you can add more known nodes from the network:

We won’t add more in this tutorial. Click Ok to finalize. You should be noticed a:

Which means your newly created identity + key are not yet published on the server. Click Yes to make the publication. You will be asked for your password, which will be used for signing your identity:

You should now have:

Click on Ok to finalize. You will again be asked for your password (dunno why). Enter it again:

You should now be back on Home screen with some changes displayed:

If you reached this step, then your identity was successfuly created. Well done! :wink:

Joining a community

What you did was to create your identity. But to really join a community (and its currency), you ohave to express your will to join it.

Doing so is easy as a pie: click on Send membership or Renew membership button:

You should be asked for your password if did not checked « Remember my password for this session » earlier:

and then, if you don’t have any error message, then your membership was successfully sent.

There we are: you are now eligible to join a community. However, you won’t actually join. Why? Because you also need certifications for your identity made by other members.

So now, you need to gather enough certifications, for example by asking them on this forum. And you may also yourself certify others so they receive certifications too. Follow next explanation to learn how.

Certify someone else

A member

If you want to sign someone that you know is a member, it will be super simple: first, go to Community > Members tab. Here, you will find the list of current members. All you have to do is to right click on the user ID you want to certify, and click on Certify identity to have the following screen:

Note: here I cannot continue because I’ve already certified someone 1h ago, so I must wait 2hours and 35 minutes to make another certification. But you should be able to continue.

Click on OK to finish the certification process.

You will be asked your password:

And then see the message:

Of course, the public key won’t be the same: you will have the one of the user you wanted to certify. :relieved:

An ex-member

This case is a bit trickier: you need to have the user ID you want to sign in mind.

Have it? Good. Go to Community > WoT tab. In the search field, type this ID. For example, cgeek:

If you type on the « Enter » key of your keyboard, the graph area should be updated to center on the user ID you typed. To sign it, right click on the ellipse of the user you want to sign and choose menu Certify identity:

You should now have the following screen:

Click on OK to finish the certification process.

You will be asked your password:

And then see the message:

Anyone, even a newcomer

Go to menu Actions > Certification.

You will have following screen:

Choose User public key option and copy/paste (or manually enter) the public key of the individual’s identity you want to certify. Click on OK to do the certification.

You will be asked your password:

And then see the message:

Congratulations! You have just certified this key! :slight_smile:

If others do the same for your identity, then you might become a member of the community.


There we are! We have been through the basic steps for creating an identity with Sakia, express our will to join the community and learned how to certify one’s identity.

This topic will be edited several times to reflect the incoming new versions of Sakia, which will be with no doubt, richer and richer each time to make our life easier.

Let’s make currencies!


Le Temps et l’Origine de l’Univers




Cours donné dans le cadre des Rencontres Exobiologiques pour Doctorants en Février 2015 au Teich. Par Marc Lachièze-Rey, astrophysicien au laboratoire AstroParticule et Cosmologie (APC) de Paris.
Réalisation et Montage : Laurence Honnorat, Innovaxiom (http://www.innovaxiom.com/)

Plastics from Pollution

The Market

The carbon markets across the world were valued €98 billion in 2011, up 4 percent
compared to 2010. The European Union Emissions Trading System (ETS), the world’s
biggest carbon market is good for €76 billion. The overall traded volume in EU Allowances
(EUA) reached 6 billion tons last year, a 17 percent increase over 2010. The EUA prices
dropped to €6.3 per ton, half their value a year earlier. The UN issued Certified Emission
Reductions (CER) were valued last year at €17.8 billion, down 2 percent from 12 months
earlier. The North American carbon market also declined in value from €367 to €221 million
for 2011.
While there is a price on carbon under the climate change schemes, there is also a market
for purified carbon dioxide (CO2). The CO2 market for hospital uses is forecast to reach $292
million by 2017. The biggest industrial consumer of CO2 is the soda drinks industry.
The CO2makes the drinks more acid, tastier and the carbonic gas also serves as a preservative.Since drinks hold more CO2 at low temperatures than at higher temperatures, the drink makers suggest that their products are preferably served very cold offering the customer a stronger taste. A company like Pepsi sold one billion cases of fizzy cola last year, consuming an estimated 160,000 tons of pure CO2. Worldwide, well over a million tons of CO2 is pumped into soft drinks which are all subsequently released back into the environment. The cost of pure CO2 delivered liquified at the factory can reach €2/kg.
Attempts to connect the high level of emissions from energy and industry by burning fossil
fuels with this industrial demand was originally received enthusiastically by all parties, until problems with quality control forced the industry to retreat from the recycling of low
concentration CO2 from energy generation, industrial and agricultural processes like the
making of magnesium from dolomite or the burning of lime for cement. The demise of this
opportunity to channel one million tons of CO2 from the environment to the industry, offered on the other hand fresh growth opportunities for traditional gas companies like Air Liquide,the largest supplier in the sector with nearly €5 billion in turnover.

The Innovation

The use of CO2 as the by-product of industrial and agricultural processes requires a major
breakthrough since the discovery of contaminated carbonic gas in Coca Cola drinks in
Belgium caused uproar questioning the quality control of major corporations. Where as there are numerous companies prepared to undertake the concentration and the purification of food grade quality CO2, the supply chain management of multinational corporations prefer to opt for the extraction of the gas from the production of hydrogen or ammonia from natural gas or coal, and recently from the fermentation of sugar cane into ethanol. Corn to ethanol also releases large volumes of CO2 increasingly recovering it for industrial use.
Unfortunately, corn as a fuel and a source of carbonic gas competes with food. Therefore,
even when the raw materials are from a biological source, it cannot be considered
Geoffrey Coates was born in Evansville, Indiana. He obtained a degree in Chemistry from
Wabash College (Indiana), and graduated in 1994 from Stanford University, California in
inorganic chemistry. He undertook a post-doctorate at California Institute of Technology.
Since 1997, Geoff is a member of the Cornell University Faculty. He built up an academic
career as leader in the field of polymer synthesis with an emphasis on catalytic
transformations. He observed that the predominant source of carbon for approximately
30,000 chemical compounds are produced worldwide from a basic set of around 300
chemical intermediaries. Ultimately, nearly all these intermediary molecules come from fossil fuels. Geoff was interested to find new routes to take bio-renewable resources into polymers.
He realized that the key to success is not the availability of the raw materials, but rather the identification of catalysts that exhibit the reactivity required for polymerizing CO2.
Carbon dioxide is an ideal feedstock since it is abundant, inexpensive, low toxic and non-
flammable. Geoff observed that Nature uses CO2 to make over 200 billion tons of glucose by photosynthesis each year, but chemists had until recently little success in developing a
process that exploits this attractive raw material. Geoff and his team developed zinc- and
cobalt-based catalysts that convert CO2 under mild conditions into an intermediate feedstock for chemicals products. The opportunity to recover both the zinc and cobalt-based catalysts is a challenge that still needs to be overcome in order to make this a closed-loop operation that does not increase our already excessive reliance on mining.
Geoff built up a strong research team at the University of Cornell. However the scope and
the depth of these catalysts, and the need to take this innovative approach to polymers from greenhouse gases to market, required special attention. He went on to create Novomer (newpolymers) based on an exclusive license to the catalyst patents from Cornell, and mobilized $6.6 million in investments including from DSM the Dutch chemical group. This was an ideal partner in search for innovations since the management decided that 50 percent of all its total sales will be from ecoproducts by 2015. Physics Ventures, the spin-off fund from Unilever matched the investment from the DSM group.

The First Cash Flow

The Novomer team has successfully transferred the catalyst technology from the laboratory to the demonstration scale and is now developing the capability for both batch and continuous large scale commercial production. The portfolio of opportunities is so vast that the product developers are testing the CO2
-based polymers in a wide range of applications including thermoplastics, binders, electronics, coatings, surfactants and foams. The opportunity to replace blow molded bottles not only caught the attention of DSM, but also of Unilever, one the world’s largest consumers of plastics. Tests by Unilever, and its declaration of interest in this novel way of converting pollution into plastics was instrumental for Novomer in getting an $18.4 million grant from the United States Department of Energy to pursue this pathway to commercialization. The test production of extruded thin film offered another component in the overall drive to have packaging produced from pollution. Geoff and his team got the necessary financial breathing space to get the products and the production processes right.

The Opportunity

Unilever sees a great benefit in producing packaging that is cost competitive without
subsidies, carbon taxes or a cap and trade system. This is not because the company is
against, the future of these political decisions is uncertain and therefore business cannot rely on innovation as a strategic option when its final faith is determined by politics and
international agreements. The Novomer owns a platform technology that goes beyond
packaging. It could redefine hundreds of products as diverse as diapers or paints. Now, we
see the opportunities to combine clusters of technologies on this innovative platform driven by this novel insight in catalysts. Competing on the market without subsidies, converting waste into a resource, and perhaps even get paid to take it out of the air, are typical characteristics that strengthen the Blue Economy proposal.