We've been building the Jamaa app step by step. I'll be uploading some of the files in the coming days. For future reference, the link is:


https://github.com/UMMATI/jamaa

For anyone who remembers the post about Ummati, a Proof of Reputation platform, an update.

  We discussed and decided to divide the project into a blockchain component focused on developing the PoR, and an application which will be the first use case of the Ummati PoR blockchain.

The app is named Jamaa, and we have now finished the design of the UI and would like to get feedback on it.

The link of the UI prototype/mockup can be found at: https://xd.adobe.com/view/789abfeb-2ffd-418d-b5b3-2fe6c052dce7

If anyone has feedback please post it here or join us on our Discord server: https://discord.gg/bjnXMg

By the way, there may be bounties in AMN for useful suggestions that lead to improvements in the design.

Thanks for the update

Thank you @monsterer2 , this certainly helps. I still have more questions though.

   So difficulty is adjusted with each block according to the network hash power. Network hash power is measured by the speed with which a block is discovered, correct?

So how is a 51% attack possible? As I understand it, the new block header must be hashed using the previous block header. Why then does controlling a certain amount of the network power enable double spends?

  Please can anyone explain to me exactly how proof of work is a solution to byzantine fault tolerance. I am having trouble with the concept.

  I am looking for someone who can help me write the code, possibly by forking ethereum classic, to create a reputation based consensus system. I already have some of the mathematical basis, but I need help conceptualizing how to transfer it into code.
 
I can pay in bitcoin, bitcoin cash, ltc, etc, etc. and of course offer a developer stake in the project itself.

"Your a stupid tool" I don't really need to say anything more.

  Every crash there seems to be a chorus of noob accounts talking about how bitcoin is going to 0. Has anyone actually come out and admitted to being paid to manipulate public opinion? I mean, it is too lucrative not to do it, and I have no doubt the pros who own the major media do it all the time with the major financial markets.

What do you need credit for? Ikea condo and a new honda civic you can be enslaved by?

this guy knows what he's talking about

 I would advise you to go ahead and take out as much more credit as you can, buy more bitcoin, then default on all of your debt, give the banks the finger, and move to a third world country and wait for the next rally, at which point you can marry a local and buy a big piece of land in their name, and be sure to be nice to them and have a good relationship.

Har har har. Fresh meat in them thar market.

  I was involved with the IBB when we were still giving loans, however I was the main person in charge and we stopped working due to concerns about if some of our practices were halal. I have since done a lot of research about the ideal way to do finance in Islam. We are currently working on the successor to the IBB, and we do have contact with at least on shariah compliance officer and one Ph. D. in Islamic banking who may become a full advisor. If you have any questions or would like to discuss you would be welcome to join our Discord.

The purpose of the IBB in the beginning was to provide interest free loans to the bitcoin community, for the development of the bitcoin infrastructure.

 Any type of work benefits from financing, and interest free financing is much better for society, especially in the long run.

 Yes you are right, ultimately Muslim just means a person who is submitted to and in harmony with natural and moral law. The purpose of Islam is simply to make maximum benefit and minimum harm. This is why Islam is an expression of mercy, alhamdulillah.

Some more updates, we have a new advisor who is a professor of business with a background in Islamic finance currently teaching at the Abu Dhabi higher technical college.

  We contacted him after reading his excellent paper on the modern murabahah financing model available here.

  After contacting him, it turns out he has a very similar vision. We are very grateful to have his support.

  Yes, your concerns are very relevant. The Islamic Bank of Bitcoin which I used to be involved in is no longer active. Currently we are working on a new variation which addresses some of your concerns called 'Ummati.'

1- In order to reduce risk of default, we are developing algorithms based on mobile phone data and requiring that anyone requesting financing has a certain amount of backing from others. In the event of default, their friends and family who pledged support are liable, and are all excluded from receiving financing in the future if they do not make good on their pledges. This approach has been up to 98% effective in the Phillipines, we are currently working on deploying it in Indonesia.

2- the structure of financing, as you said, is based on equity or an ownership share in the venture by investors. Rather than making monthly payments, each ownership share carries the right to a percentage of profits. Profits are payed into the contract until the person receiving financing has completely bought back all the ownership shares.

3- security is based first on ID verification (selfies, government ID, mobile phone data) and secondly field agents who take a percentage of profits and have outstanding track records of picking successful projects. This allows for the leveraging of local/customary law which is often very important in areas where micro loans are made.

You can check out more info and are welcome to offer advice and join the discussion. This is the thread here on the forum.

https://bitcointalk.org/index.php?topic=2137399.0

  I see a lot of ICO claims, but I actually have not experienced any use of blockchain other than bitcoin that has actually brought me major utility.

   Sure, theoretically, but ideas are easy to come up with, implementation is the hard part.

@iqlimasyadiqa  were you also working with the IBB? Do you remember sondooq or senbonzakura? 

Actually one of the reasons I quit working with the IBB is because I learned that this accepting of a gratuity or voluntary extra payment for a loan is not universally accepted by scholars, this is why I am working on a project now based on profit sharing about which there is no doubt in Islamic law.

In Islamic law it is not allowed to harm or take advantage of others, so since interest can easily lead to the exploiting of the poor by the rich, (and many other problems) it is not allowed at all.