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Questions tagged [dapps]

Questions about applications and projects on Ethereum: a decentralized application (dapp) does not require any servers or backends and runs independent on a distributed blockchain.

1
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0answers
132 views

Most expensive DAPP (in terms of gas usage per transaction) [closed]

Which DAPP currently running or in development is likely to use the most gas per transaction?
1
vote
1answer
1k views

How to read a data sent to my Smart Contract

How can I read/ get a data that has ben sent to my smart contract ? I tested sendTransaction({data: xyz }) and when I tried to get this data from the Smart Contract using msg.data I got NULL this ...
5
votes
1answer
380 views

Does Eris Dapps end-users need an Ethereum enabled browser and and their own running node?

Recently I’ve been doing some research on blockchains and smart contracts. I came across the concept of public, access controled and private blockchains and smart contracts. Ethereum and Eris can be ...
3
votes
1answer
604 views

Are there any alternatives for Meteor JS to build DApps?

Do you have to use Meteor for building Dapps? Are there any alternatives for Meteor JS to build DApps? Is it maybe even possible to build distributed applications for Ethereum without utilizing ...
4
votes
0answers
356 views

Big Data/IoT projects on Ethereum [closed]

Can you provide names of Big Data or IoT projects (other than Slock.it) currently running on Ethereum? I'm especially interested in how Big Data could use it or whether a combination of IPFS and ...
7
votes
3answers
2k views

What are GavCoins and what is their significance?

Quite simply, what are GavCoins and what is their significance?
6
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1answer
427 views

Is it possible to exhaustively search through all Ethereum contracts in a local node

Currently building a stock exchange on Ethereum. Based on the current design, I have users creating individual buy orders as separate contracts tied to a central stock counter contract in the form of ...
4
votes
1answer
91 views

Strange popup window trying to send ether when I run aleth zero. What should I do?

I ran aleth zero and mined with aleth one a while back. I had mined some ether from a mining pool. Now when I run aleth zero (updated client for windows), I get an annoying and unstoppable pop up ...
6
votes
1answer
470 views

How can I open a dapp in mist (v0.7.1)?

I can't find a way to open a dapp/enter url in Mist browser (v0.7.1). Do I need to download any special build, build it from master, or is there a switch for this?
4
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1answer
86 views

As Dapps obviously need JS how will they be accessible to visually impaired people?

How about using screen readers or text only browsers with Dapps? Has someone ever tried existing Dapps with this tools? Thanks.
8
votes
1answer
221 views

How many topics can a whisper message have?

I'm thinking in a new DAPP that may use whisper extensively. To evaluate the viability of the DAPP, I need to know if there is a limit on the number of topics that a whisper message can have. I would ...
7
votes
2answers
832 views

Does Ethereum offer encrypted peer to peer communication applications?

I am wondering if Ethereum can be used for encrypted peer to peer communication like delivering encrypted short messages or encrypted data in bulk between two or multiple parties. Are there any ...
4
votes
1answer
698 views

Exposing Geth to Hybrid mobile app

I'm making a Hybrid mobile app and planning to use web3.js to access Geth. What's the best way to expose Geth to the hybrid mobile app? I will be running Geth on ubuntu 14.04 on Aws
5
votes
2answers
360 views

What Ethereum applications can I use without having to mine or buy ether?

I would like to play around with Ethereum, create contracts, do stuff. I want to learn, not do anything serious for now. Dao Wars seems like a good start, but it costs 3 ETH just to start trying. Is ...
9
votes
3answers
1k views

How would stablecoins work on Ethereum?

The idea of a stablecoin in Ethereum is to create a token that is pegged to the price of say $1 USD. What are the main ways of achieving a stable cryptocurrency? What DApps are implementing them and ...
2
votes
1answer
333 views

sendTransaction from iPhone app

How do I call sendTransaction from within an iPhone app? I was thinking of running a web to Geth proxy where the iPhone app would call the Api exposed by the proxy which in turn calls my self hosted ...
3
votes
1answer
725 views

Nethereum and UWP on .Net c#

Is there a way to make Nethereum work with an UWP app ? Because when I try to download the package with nuget It raise an error. I enter the following command in Nuget Package Manager: Install-...
4
votes
1answer
1k views

MIX dapp IDE - how to run your dapp after deployment, error web3 is not defined

I managed to run a personal test chain. I deploy the Sample contract and everything is ok. Transactions included. Now how can I run the dapp? I go to the local package folder inside www I open the ...
17
votes
4answers
14k views

How do I send an arbitary message to an Ethereum address?

How can I send a message to another Ethereum address? And how would that user receiving know that its a message? Is there an Ethereum wallet that will show that I sent a message to that address? And ...
8
votes
1answer
12k views

Where can I learn how to develop DApps using the solidity programming language? [closed]

What resources exist to help people learn the solidity programming language and create smart contracts & DApps on Ethereum?
5
votes
1answer
264 views

AlethZero and Mix problems

I am trying to get started and learn Ethereum development, mainly using the tutorial at dappsforbeginners.wordpress.com. However, several features referred to in the tutorial are simply not appearing ...
3
votes
1answer
430 views

How do I make a Dapp that orders pizza?

So I recently purchased ether.pizza with the intention of setting it up so people can order pizza with ether just to use as an experiment in Dapp and contract development. Initially I plan on just ...
33
votes
2answers
19k views

How does Lisk differ from Ethereum?

Lisk is going to be a full stack DApp development framework for building and distributing decentralized applications. It's currently in the crowdfunding stage but got also added to Microsofts ...
1
vote
1answer
379 views

Is it possible to embedd the UI of DApp in the blockchain?

I have read the answers for this question as well as their linked resources, but I didn't found the answer for the following question: is it possible to embedd the UI of ÐApp in the blockchain? If I ...
29
votes
1answer
14k views

What does the keyword “memory” do exactly?

I've been looking through the code of Etherdice and noticed that some variables are declared like ParserResult memory result; and I haven't found the keyword "memory" in any documentation. What I ...
4
votes
2answers
400 views

Is it possible to mine slowly?

I'm developing a DAPP in a laptop. I setup a private test blockchain with one node to develop locally and do not have to spend real ethers. It works fine, but when I start mining, the laptop gets ...
8
votes
2answers
2k views

Will Ethereum be the Internet 2.0?

I've been following Ethereum since it was announced and I remember that the appeal was that it was "Bitcoin 2.0". While email replaced the post and Bitcoin replaced fiat, Ethereum would replace legal ...
5
votes
1answer
167 views

How can I see the payouts of this Ponzi scheme dapp?

Towards the very beginning of the Ethereum release, a friend participated in a Ponzi scheme dapp by sending 1 ETH here. He was among the first! For some reason, it seems he has not received any ...
5
votes
1answer
847 views

What is BlockApps and how can it be used with Ethereum?

BlockApps says: Customized, permissioned private Blockchain ledger to your specifications. Based on Turing-complete Ethereum standards, your Blockchain has full Smart Contract support built-in. ...
10
votes
2answers
4k views

Can I run a website 'on' ethereum or only 'with' ethereum?

Do you run a website 'on' ethereum or 'with' ethereum and if the latter, is that only with 'nodejs'?
6
votes
2answers
954 views

Ethereum fork of OpenBazaar

Is anyone forking OpenBazaar for Ethereum? OpenBazaar is a Bitcoin marketplace, and the OpenBazaar developers have expressed no interest to integrate any currencies other than Bitcoin.
4
votes
1answer
258 views

EtherEx decentralized exchange

Been waiting for a long time to be able to access a decentralized exchange. When will EtherEx be launched and will it support BTC ETH pair?
4
votes
1answer
2k views

Where exactly do DApps run? Who gets rewarded for running them? [duplicate]

So I am currently running a full node, as well as a GPU miner. I am curious first of all where do DApps get run? They wouldn't make sense to run on a GPU as they aren't very parallizable, so I am ...
7
votes
1answer
1k views

What reputation systems are implemented on Ethereum? [closed]

I'm looking into finding some sort of reputation system on Ethereum. Are there any projects out there already that do this? I found a DEVCON1 video about reputation systems and a few people discussing ...
18
votes
3answers
5k views

How can DApp developers profit from their work?

Suppose that I make a new, cool DApp that gets very popular. In order to cover development costs and make some profit, I charge users of the app a small quantity which is required to use to app - all ...
2
votes
2answers
274 views

Is it possible to access Ethereum API via the browser?

How do you access the api's of ethereum via the browser? Say I wanted to make a one page app that updates every 1 minute with the block number. And where can I get a list of all the API variables?
3
votes
1answer
306 views

Why should I be interested in Ethereum? [closed]

Is there a list of features and benefits to using Ethereum?
4
votes
2answers
823 views

What are the ways I can contribute to Ethereum?

I'd like to know more about how to contribute, both on a technical and non technical perspective
3
votes
1answer
322 views

Are there any decentralized local exchanges for euro/usd to ether?

Is it possible to have something like a DApp to find the closest Ether owner to purchase or sell ether? Something that can be used as a decentralized market.
3
votes
1answer
235 views

What is an 'uDApp'?

The online solidity compiler offers an output of smart contracts labelled uDApp, for example the greeter uDApp looks like that: [{"name":"greeter","interface":"[{\"constant\":false,\"inputs\":[],\"...
9
votes
2answers
4k views

How to connect a web site to a geth node?

Before the DApp-browser Mist was available, this web3 library seems the way to go on building a bridge from contract to a frontend (web site). But, I cannot get the very basic examples to work. ...
20
votes
3answers
7k views

Are there any public/free nodes to connect a Dapp front end?

I have a small Dapp written in Meteor (client only) that reads some contract and account info from the blockchain. I can deploy my front-end code for free on meteor.com (or a variety of other places),...
3
votes
2answers
248 views

Should we patent Dapps with new technology or processes?

I understand in the decentralized space patenting anything is generally frowned upon. Having said that, doesn't this expose Dapp developers to patent trolls, such as the Bank of America, from ...
5
votes
2answers
346 views

How do I add my Dapp to https://www.stateofthedapps.com/?

If I create a Dapp or start development on an Ethereum Dapp, what's the easiest way to get my Dapp listed on https://www.stateofthedapps.com/?
4
votes
1answer
984 views

Deploying Meteor Dapps

What are currently the best architectural and deployment options for building and deploying a Dapp built with Meteor/Web3? For building the Dapp, a few Meteor packages are currently available : "...
9
votes
1answer
743 views

Is it possible to achieve anonymous mixing through the Ethereum protocol?

Are any developers working on anonymous mixing? Is it achievable through the development of either smart contracts or dapps? Is information leakage reduced or eliminated?
104
votes
4answers
119k views

What is a DApp?

There are new terms in Ethereum like smart contract. What is a DApp and how is it different from smart contracts?
14
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3answers
1k views

What are effective and secure ways of shuffling a deck of cards in a contract?

We want to write a card game in Ethereum. What are effective and secure ways of shuffling a deck of cards in a contract, and dealing them to players? It needs to be done in a way so that no one can ...
8
votes
1answer
1k views

Are tools like metamask putting decentralization in danger?

Does a tool like metamask, which connects your browser to a public ethereum node to simplify running DApps, put the basic idea of decentralization and trustless blockchain verification in danger? Is ...
6
votes
2answers
612 views

How does ethereum alarm clock work if you can't 'wake up'?

Ethereum Alarm Clock. This service claims that it itself is implemented as a smart contract, but how is that possible? I thought the whole reason it existed was because A contract can't wake up ...