DAppsMedia State of the DApps ethereum May, 2015

DApps Media
~State of the DApps on Ethereum
Research May 2015 ~
No copyrights, All rights decentralized.

About DApps Media
• DApps & Smart contracts info media, with international team, headquarered in Tokyo.
• Researching, and reporting DApps sometimes with interview, and spread the concept
• Towards Decentralized Autonomous Wolrld, we research and report the combination and
public benefit between DApps,Smart contracts across Different platforms.
About
Smart
contracts
DApp
DApp
DApp
DApp
DApp
DApp
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Contents
• About DApps
• About Smart contracts
• Market size
• Let’s use DApps
• Interview to founders (More)
• Our combination suggestion (More)
About

What’s DApp ?
• Decentralized Application, no centralized server, user can run
the app locally.
• Instead of the server, having backend of blockchain with the
consensus algorithm.
• DApps issue their own tokens, users and developers are stake
holders
About DApps
DApp

More detail definition?
About DApps
FromDavid Johnston’s The General Theory of Decentralized Applications, DApps
https://github.com/DavidJohnstonCEO/DecentralizedApplications/blob/master/README.md
1. The application must be completely open-source, it must operate autonomously, and with no
entity controlling the majority of its tokens. The application may adapt its protocol in response
to proposed improvements and market feedback but all changes must be decided by consensus
of its users.
1. The application's data and records of operation must be cryptographically stored in a public,
decentralized blockchain in order to avoid any central points of failure.
2. The application must use a cryptographic token (bitcoin or a token native to its system) which is
necessary for access to the application and any contribution of value from (miners / farmers)
should be rewarded in the application’s tokens.
3. The application must generate tokens according to a standard crytptographic algorithm acting as
a proof of the value nodes are contributing to the application (Bitcoin uses the Proof of Work
Algorithm).
There are many definition for “DApp”, but this David Jonhston’s at DApps Fund
definition is clear and maybe the first one.

Must be open source ?
Some projects are not completely open source, some of the codes are open source.
Here’s the open source DApps references:
Ethereum State of the DApps https://docs.google.com/spreadsheets/d/1VdRMFENPzjL2V-vZhcc_aa5-
ysf243t5vXlxC2b054g/edit#gid=0
DAppsFund website http://www.dappsfund.com/
About DApps

How to use DApps ?
About DApps
If you have used Bitcoin, you have already used or using DApp, but More “app” like
feeling things you can use and imagine by the following way.
1. Using github way - Google“github + {DApp name}”
2. Using official release way – Google “{DApp name}” and visit the site and install
3. Future way – DApp Browsing & installing “{DApp Name}”
3 Should be pointed out. In ethereum case, user can use Mist browser and search the DApps
from the place, and install, run on it.

Why should we use DApps ?
About DApps
1. Decentralization– No censorships from centralized server
2. Privacy – Related to decentralization, generallly, your data is shared with encrypted format.
3. Secure transactions – P2P communication secured by blockchain
4. Useful financial Transactions – Ex) Bitcoin
5. Not just consuming, you can be involved in DApp network as a stake holder, developer, miner, etc roles.
And more metirs we will find in the relationships between DApps, and smart contracts. Some DApps like Gold
Feeds DApp helps other DApps to develop trust-less application.
(Gold) price feed: https://github.com/SilentCicero/meteor-dapp-pricefeed Nick Dodson

Why media needed ?
About DApps
You can be involved in the DApp, easily by having tokens, or currencies.You are not just to be user,
can be developer, miner, smart contractor, as many roles.
However DApp itself is currently not penetrated to users. One of the reason is userability for
installation.
Proprietary apps DApps
Collaboration
possibility
Have to talk with the company
owner with expilicit merit for
the share holders
If the contribution is to be some
plus for the DApp, it will be
welcomed.
Development
efficiency
Closed source, Limited API Open source, All APIs are oepn
You One user.
Users <->Company
Can be user, developer, miner,
smart contractor

I heard a lot about “Smart contracts”
what is the meaning of that ?

Smart contracts ?
From the 1997, Nick Szabo cryptographer suggest the basic idea of smart
contract., and also here .
However after Smart contracts comes to life, there are also have many
definitions. Peter Todd, Bitcoin core developer says “no one has a clue
what a smart contract actually is, and if we did it’d need oracles”
About smart contract

The relationships between
DApps and Smart contracts ?
Currently there are some platforms for ‘Smart contracts’, such as Mastercoin, Nxt, Nem,
Counterparty.To describe the dapps, and smart contracts, let’s take two famous DApps,
Bitcoin and Ethereum.
When we talk about Ethreum and Bitcoin, some people misunderstand that.
Actually both of them are DApps, and can be able to run smart contracts.
Not good Wide recognition

What kind of things are the place ?
This is the traditional legal paper alternative use case of the smart contracts.
For example, imagine the traditional paper contracts, when you enforce the contracts, you will go to
court, Just like that, you can write smart contracts as a legal contract for the assurance of agreement,
and publish to blockchain. And when you enforce it, you will send message. However there are ofcource
many things to notice here’s the great link of the lawyer, who is also engineer, and the founder of Eris,
smart contracts platform.

Bitcoin and Ethereum can run
smart contracts ?
Yes, both of Ethereum and Bitcoin, and the platforms described are running smart contracts, but the main differences
are
・Turing Completeness
・Value Blindness
・Lack of state
・Blockchain-blindness
From: https://github.com/ethereum/wiki/wiki/White-Paper
~Bitcoin is gold, Ethereum is oil. The purpose itself is different~

Market of DApps
Market size
By estimating the value of the crypto currencies which is used to the Dapps, then can estimate
the market size. Or other way is to measure is
Reference: Crypto currency market captalization, 12th May, 2015
Estimated Total market size of wide definition of DApps

So these are brief explanation
Next, let’s use DApps

State of DApps on Ethereum
Enjoy DApp
Today’s report we will research these State of DApps.
https://docs.google.com/spreadsheets/d/1VdRMFENPzjL2V-vZhcc_aa5-
ysf243t5vXlxC2b054g/edit#gid=0

Cosmo
Solidity is a special-purpose for smart contract language. 12th May, 2015 now, it’s the
most conventional language for using smart contracts on Ethereum.
Enjoy DApp
~A realtime solidity development environment~

MintChalk
MintChalk shows smart contracts templates, enables user to deploy smart contracts.
For instance, Kickstarter contract, CoinFlipping contract, and Bank like system contract.
Enjoy DApp
~A contract publishing tool ~

Etherex
Not running for now, 12th May, 2015. Decentralized exchange , no centralized risks,
such as Mt.Gox. We expect they provide charts for other DApps as a contract way.
Enjoy DApp
~A decentralized exchange~

BtcRelay
Genesis block started at the time current userbase estimated to these users.
~A bitcoin two way peg aka side chain~
Enjoy DApp

EtherGit
15th May, 2015 Currently seems to be not coordinating. It will have Ether Faucet also.
It can be used with the mining status, blockchain number explorer.
http://stats.ethdev.com/
Enjoy DApp
~Blockchain Explorer~

WeiFund
~A decentralized crowdfunding application~
Enjoy DApp
The problem about decentralized fundraising is how to value the project, and who check the
identity. Possible decentralized solutions are 1. Using reputation chain 2.Using reputation DApp
like GroundHedge.
WeiFund contract: https://github.com/WeiFund/WeiFund/blob/master/WeiFund.sol

DApp pricefeed
~A price-feed for smart contracts~
Useful continuous update data can have subscription business model even in DApp world.
This Dapp provides the subscription functionalities for smart contracts.
Enjoy DApp
Functionalities
• Landing page, admin page (a
dashboard for contract owner)
tracking page (to track
subscriptions)
• can subscribe an address
• only subscribers can access the
feed data
• renewable subscriptions
• owner can manage feed price,
subscribers, subscription duration
and payout balance
• a basic python server for updating
the feed info

Spitzl
Enjoy DApp
~Fractional investment platform using Ethereum~
Currently seems to be no source opened. The traditional financial system relies on a
network of intermediaries to create contracts and settle trades between market
participants. Our trading platform is built upon a decentralized technology inspired by
Bitcoin. Through this technology, anyone in the world is able to trade instantly, without
the need for a broker, exchange or clearing firm. http://www.spritzle.io/

BitVote
Decentralized voting system, using vote ledger. By using the blockchain tech, user can show the
time you vote, and if the time is within voting time, the vote is valid. If not not count the vote.
https://bitvote.github.io/
Enjoy DApp
~A decentralized voting system~

ADEPT
Enjoy DApp
~Autonomous DEcentralized P2P Teletonomy ~
This video shows automated washing machine, and IBM ADEPT project components. IBM and
Samsung chose 3protocols.
1.BitTorrent for file sharing 2.TeleHash P2P messaging 3. Ethereum (Smart contracts)

Augur
Interview
Can make prediction makret. And the predicted data can be got from here. Augur add
“Reputation” to users by original algorithm for prediction, and user can send, earn, or be
subtracted reputation by smart contracts. They have also voting mechanism, search engine for
contracts and markets.
~A decentralized prediction market~
1. market commenting
2. featured markets
3. filters to organize markets by
volume, category, number of
traders, trading fee, initial
liquidity
4. api voting
5. search engine for contract
data / markets
6. social media integrations

TrustDavis
~Reputation system on Ethereum~
Reputation system is hot topic of blockchain tech. And if there will be many reputation chain,
how to user the summary and estimation of weight
reference: youtube video, https://www.youtube.com/watch?v=UXjIl0LZNOY
Enjoy DApp

Project Groundhog
~A decentralized open source social network on Ethereum~
Project Groundhog focusing on controlling spam on social network, they have reputation system.
And there are incentive system, when a user share many shared-contents on their feeds. And
user can recommend or star the contents on their feeds.
Reference: youtube video,
Enjoy DApp

Whisper chat client
~A decentralized group chat~
What is whisper ? Whisper is secure messaging protocol especially for between DApps, not for
users. Back to the ADEPT project, IBM and Samsung chose “Telehash” for messaging tool.
However one of the purpose of developing Whisper aims to enable user to get configurable
between routing privacy and routing efficiency (probability)
Enjoy DApp

Pokereum
~Decentralized Poker~
Provably fair poker application, 14th May, 2015 15 days to go the DApp release
and the crowd funding.
Enjoy DApp

Wallet DApp
~Ethereum wallet~
Now DApp wallet project intergrated into “Mist”.Mist is not just Ethereum browser,
however Mist vision is to be integrated blockchain tool kits.So there will be reputation
management system, wallets, mining, smart property management system, online
agreements, and DApps store.
Reference: Ethereum presents Mist youtube video.
Enjoy DApp
Mist DApp Wallet

Cryptocoin watch
~Ethereum datafeed to watch
the amount received of cryptocurrencies~
Enjoy DApp
The CryptoCoinWatch DApp lets you inspect a datafeed and allows you to watch a new address. As pointed out
in Ethereum whitepaper.
This uses serpent, tailored for smart contracts language. In Bitcoin, when you use event listen function, you
need to add configulation to bitcoind.
However in Etherum, just write and deploy the contracts to blockchain, can listen. If you are interested in, you
can compare the references below
reference: Ethereum datafeed here Bitcoin payment processor open source “Baron” here
This serpent code used in the DApp
is useful to learn event driven
contract
https://github.com/EtherCasts/crypt
ocoinwatch/blob/master/contracts/c
ryptocoinwatch.se

Atomic Swap
~Atomic cross-chain trading~
In computer science, atomic means a set of transactions, and if the process halted, it
can be reversed. This Atomic Swap is the contract on Ethereum side to enable
exchange cryptocurrencies between 2 chains.
Ethereum side Atomic Swap contract: By Zack Hess Atomic Swap repo
Bitcoin side Atomic Swap: https://en.bitcoin.it/wiki/Atomic_cross-chain_trading
Enjoy DApp

These are the concept level
• Guarante - eMarket
Peer-to-peer marketplace for guarantees
• SmartK -Make your NDA Smart
• BitRights -Insurance DApp
• PointNurse -Decentralized Healthcare
• Etherparty -Smart Contracts deploy
• eDollar -Stable Cryptocurrency
• Provenance -Product Origin Tracking
• Airlock -Electronic Security
• CubeSpawn -Modular Manufacturing
• Pokereum -Decentralized Poker
• DigixGlobal -Gold storage
• Lazooz -Ridesharing
Enjoy DApp

SMARTK
~Make your NDA Smart~
However as many people points out, if you want to execute the smart
contract codes on blockchain, we need oracles (trustable information
provider) for smart contracts to decide whether the NDA is breached or not.
Enjoy DApp
The benefits are
‐ Less transaction costs
‐ Speed of execution
‐ Collective legal wisdom
‐ Easy access to justice
‐ Equal playing field

Digix Global
~Gold Storage~
Bitcoin in gram of gold is volatile, so if some tokens can be stabilized with Gold it’s will
be useful as “StableCoin”However we have to trust Digix Global for the certification,
“Proof of Assets”
Enjoy DApp
Their audits are
1. Private Audits: Clients are welcome to come to our certified
custodial vaults in Singapore to inspect your gold bars in a highly
private and secure environment.
2. External Audits: We have engaged Inspectorate Singapore
(www.inspectorate.com) to audit our inventory and match them
off with customers’ holdings at DGX. We will hold such audits at
least twice a year.
3. Custodial Audits: Our certified custodians will provide a physical
certification of proof that your gold bars are stored safely in their
vaults. They will take photographs of your serialised bars per
request basis and have them keyed into their inventory
management systems. Some of our certified custodian’s
reputation is also on the line to provide us with their appraisal
and storage services, as they have to answer to their
shareholders as a publicly listed company in Singapore.
4. Internal Audits: We have patented a certification process called
Proof of Asset (PoA), where auditors participate to sign the
existence of Gold on our PoA certificate, which is uploaded onto
the Ethereum Blockchain.

Lazooz
~Decentralized ridesharing~
Lazooz’ vision is “Collaborative Transportaion Web”. Decentralized network will
challenge the established systems by revolutionizing how the world thinks about
peopple and things moving around. And the android is already launched, by using GPS,
there is “Proof of Movement” system mining system.
Reference: Lazooz whitepaper
Enjoy DApp
There are two basic ways to increase
movement in the system:
1. Send your movement data (i.e. running
the app and driving >20kmh).
2. Get others to send their movement data.
And the movement data can be changed to
Zooz Token, the reward for movement.

Do you have interested in the
DAppsMedia also ?
If you have, contract us from here!
Fin
Decentralization is just beginning.
We hope you start to be involved in!

DAppsMedia State of the DApps ethereum May, 2015

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