Questions tagged [dapp]

Questions about applications and projects on EOS: a decentralized application (dapp) does not require any servers or backends

Filter by
Sorted by
Tagged with
4
votes
1answer
40 views

How can a dApp pay for user's resources since the upgrade to v1.8?

Since the upgrade to v1.8 of EOSIO, it is supposed to be possible for a dApp to pay for the CPU and NET resources of the dApp users. How is this achieved on a technical level?
0
votes
0answers
24 views

Is eosio/eos not supported anymore? [duplicate]

It seems like both eosio/eos and eosio/eos-dev docker repositories do not exist because I'm trying to check out a game that is built using eos blockchain, called MonsterEOS https://github.com/...
0
votes
0answers
17 views

Resources for EOS Smart Contract Source Code

What are some educational EOS Smart Contract Examples like Elemental Battles? The best way to learn coding smart contracts and using EOS blockchain is to get some really good example references of ...
0
votes
1answer
49 views

how to connect eos smart contact with flutter app

flutter has this package name Eosdart,Im able to get the detail from blockchain with app like account detail,but im unable to push the transaction. I want to push a transaction which carry argument ...
1
vote
1answer
17 views

How to tell a certain contract in indeed used in a dApp?

The dapp review sites often list the contract names a dapp is using. I see that this is added by whoever has added that dApp into the review site. But is there a verifiable way (through an explorer ...
0
votes
0answers
36 views

Time point to string

I am currently trying to get the current time using time_point_sec(now()); Does someone know how to convert that to a std::string?
0
votes
1answer
87 views

Double sign a transaction, first on client, second on server

I am struggling with getting the following scenario to work, I want to create a transaction signed by two parties (not via the multisig contract, just a transaction with 2 signatures). One is the ...
0
votes
1answer
39 views

As of January 2019, what are the top 10 Dapps on EOS?

What are the top DAPPS on EOS as of 2019 JAN? Dapps as in "fully" decentralized and also ones that are "centralized". I believe many of the EOS dapps are centralized and not really "decentralized" as ...
2
votes
2answers
230 views

A possible alternative sign in/login process instead of firebase auth / amazon cognito using an eos contract?

I had the the idea of a secure alternative login process using an EOS smart contract instead of firebase or Amazon cognito. I would like to know if something like this feasible? My idea is somewhat ...
0
votes
2answers
54 views

usr/bin/cleos no such file or directory

I am using Ubuntu 18.04 LTS. I am trying to deploy a smart contract, following a Steemit post but I am getting an error that I don't really understand. I have run nodeos according to the the Eos ...
1
vote
1answer
141 views

EOS RAM requirement for hosting a full node?

https://medium.com/@bytemaster/eosio-ram-market-bancor-algorithm-b8e8d4e20c73 In this article, Dan pointed to the fact that "Keeping RAM scarce (64 GB) lowers the cost of hosting a full node, but ...
1
vote
1answer
20 views

Is it possible to operate with not EOS-based tokens in EOS dapps?

I can't understand exactly. Is it possible to use not EOS based tokens (eth for example) for payment purpose in EOS dapp directly. Or it can be done only via 3rd party exchanges?
1
vote
0answers
31 views

Payment to dapp with text comments best practice

I am new in eos, so maybe i say something strange. I want to create a dapp that can receive payments from mobile wallets with text comments. I imagine this like front end where user type text and ...
4
votes
1answer
89 views

BUG when two accounts send action at the same time to modify multiindex table

It took me several days to find the bug. I got a table like this TABLE t {uint64_t key, name player1, name player2, uint64_t status}; When the contract received the specific action, it will go ...
1
vote
1answer
65 views

is that a good way to gather smart contract action data in backend with Demux.js?

there is a Bill functionality in my DApp, which need gather millions of EOS action data to make up a token transfer data for front end to display. the question is, it takes quite a long time. if it ...
3
votes
1answer
100 views

Storing the data in “Memo” of block chain transaction

Can I store large size of data such as MP3 in Memo? Are there any implementation examples? To store the data or any comments in Memo, should I send some amount of EOS? Can I store the data without ...
2
votes
1answer
50 views

Reclaim RAM for dApp that creates an account and transfers funds

A dApp that creates a new account and transfers EOS to that account will have to 'pay' for 240 bytes of RAM for the new balance object on the new account. When the new account transfers some funds, ...
3
votes
2answers
191 views

eosio-cpp -abigen hello.cpp -o hello.wasm

Ubuntu 18.04.1 on VMware (Windows 10 64bit) EOSIO v1.4.1 eosio.cdt-1.3.2 i just run the compiler like this : win@ubuntu:~/eos$ eosio-cpp -abigen hello.cpp -o hello.wasm then, the ...
1
vote
2answers
50 views

Onboarding new eos users to a note taking dapp

I have a note taking dapp on the Ardor blockchain and say I wanted to migrate it to EOS. Currently these notes are just palin text messages stored in the blockchain directly (ardor data cloud). In ...
1
vote
1answer
27 views

What gambling type dapps have been created for EOS?

What are some gambling dapps that are created with EOS? Are there any gambling dapps that are not website centralized as in I can play the dapp with just a simple html/js file interacting with the EOS ...
1
vote
1answer
60 views

Is there a list of Ethereum Dapps that have confirmed moving over to EOS?

People say Ethereum dapps are moving to EOS platform. But where is this list of Dapps? And which ones are the most active that is actually moving to EOS?
3
votes
1answer
58 views

Where can a startup seek funding from block.one for building out EOS applications?

Is there a place where one can goto for funding from block.one for building out EOS apps?
1
vote
1answer
50 views

other way to let contract account provide for cpu/bandwidth than delegatew/undelegatew?

as far as i can tell it is somehow inconvenient to let the user of an contract "pay" for the cpu time. I thought that the one who manages the contract, has to stake for cpu/bandwidth, so user can use ...
2
votes
1answer
21 views

Can an object of the class 'contract' or a class that inherits 'contract' be created in the cpp file of the contract we are making?

Can an object of the class 'contract' or a class that inherits 'contract' be created in the cpp file of the contract we are making?
6
votes
1answer
40 views

Make Ledger Reflect All RAM Changes

If we want those witnessing the chain to know about our apps state without any knowledge of our service layer, what might be the best approach? Since the ledger only records the data given to it in an ...
2
votes
1answer
181 views

Why is a BlockIndexState model required when using demux.js?

I was checking the project eosio-project-demux-example since I want to use demux.js in my own project. I have doubts about the mongoose model BlockIndexState. I would like to know what is it used for....
4
votes
1answer
195 views

Why do we have to provide private keys in eosjs?

Eosjs takes a parametre in its config viz. keyProvide where we have to pass the private keys. Eos = require('eosjs') // Private key or keys (array) provided statically or by way of a function. // ...
2
votes
1answer
544 views

use EOS as private blockchain for a loyalty system

We are working on a loyalty system powered by blockchain. Using blockchain enables us to have basic security at the beginning and scale easily. it makes total sense to us. the loyalty system will ...
2
votes
2answers
365 views

I can not find a definition for require_auth2, what does this do and how?

require_auth2 is used in action.hpp's require_auth. void require_auth(const permission_level& level) { require_auth2( level.actor, level.permission ); } require_auth2 is declared in action.h....
0
votes
2answers
43 views

Why the EOS documentation still says Dawn 4.1?

Has the documentation been updated to 1.0?
0
votes
2answers
60 views

EOS Programming tools in the near future?

I am starting to make my first steps on EOS programming but I find the tools available to be quite raw at the time being. There are many things (Integrated IDEs, platform installers, etc) that could ...
4
votes
1answer
323 views

Why Launch dapp On-Chain VS Side-Chain?

I am struggling to come up with reasons to launch a dApp intended of reaching significant size completely on the main chain vs a customized side chain. I think either would utilize a token. By ...
1
vote
1answer
229 views

Does the RAM burn out forever or is it reusable after some time?

I would like to purchase RAM to do some actions such as smart contract executions as well as token transfers. On Ethereum, you would have to pay for gas and the gas burns forever. Am I going to be ...
3
votes
5answers
302 views

Do you know any useful links to help you develop DApp?

I've gathered links to help you develop DApp. I want more.
1
vote
1answer
102 views

Authorization flow in dapps

How authorization works in EOS dapps? I mean in application layer. For example in a trello like application how we manage to just the participants in the project are able to see the tasks?
1
vote
1answer
80 views

Does EOS VC invest in dApps in exchange for equity or tokens?

EOS VC has taken forward steps to invest in dApps in partnership with other VCs. In the traditional world, VCs invest in companies in return for equity. What does EOS VC and their partners seek in ...
1
vote
0answers
23 views

Is it permissible for dApps to use 'EOS' in their brand name?

Are there any trademark restrictions on naming dApps EOSbook, EOScabs, EOSfood etc? If the answer is no, then isn't it possible that somebody out there might go out and obtain a copyright for 'EOS'? ...
1
vote
2answers
492 views

Difference Between Eosio.token and Eosio.system

I have an idea for a DApp I'm looking to build after launch. It won't be large, but it'll be on a large platform (won't name it here because I don't want anyone taking my idea lol). After cloning the ...
3
votes
1answer
206 views

Can an action in a smart contract concurrently executed?

In a smart contract if an action is executed simultaneously and if it tries to modify the same record in a table(using multi index API), How to add mutual exclusion to the shared resources? For eg. ...
2
votes
2answers
66 views

How will dApps & DACs built on EOS deal with the requirements of GDPR?

GDPR expects it's citizens to have the 'right to be forgotten'. A company failing to fulfill this obligation is expected to pay a hefty fine. How will decentralized autonomous communities who store ...
8
votes
2answers
730 views

What is the correct way of issuing your own token?

There is an esoio.token contract. This contract be used for issuing and storing many tokens starting with EOS. However, is it possible to issue tokens without using the eosio.token contract? What is ...
10
votes
1answer
163 views

How to architect token economies for DACs / DAOs built on EOS?

From the keynotes and interviews of the Block.one team it is evident that they envision a world of Decentralized Autonomous Communities (DACs) and not just decentralized apps. Steemit is the primary ...
5
votes
2answers
774 views

Can someone explain EOS sidechains to me?

Independent platform, Main chain, sidechains, smart contracts. Can someone define these terms for me? I don't quite understand the idea of sidechains. Is sidechains something like threads in ...
5
votes
1answer
64 views

How can developers prevent abusive or spammy transactions on dApps if it's free for users to use?

Let's suppose Facebook was built on EOS as a dApp. A 'Like' is a transaction written on the blockchain. Unliking that Like is also a transaction written on the blockchain. What if a user continuously ...
5
votes
2answers
101 views

How can a dApp developer ensure that their tokens are Utility tokens and not Security tokens?

If a developer wishes to create Utility tokens and not Security tokens, what are the conditions it must fulfill? From my understanding, Utility tokens must also be native tokens - meaning the ...
19
votes
5answers
2k views

What programming languages will be supported by EOS?

I understand that EOS supports C++ at launch and can support any language that compiles into WebAssembly (WASM) Here is a list of languages that compile to or are compatible with WebAssembly. I am ...
1
vote
0answers
26 views

How will backend analytics such as health monitoring and business intelligence work for EOS dApps?

Centralized apps often use tools like New Relic to monitor their health in real-time. The use of business intelligence analytics platforms like Tableau is also common practice. Can the same tools be ...
6
votes
3answers
412 views

Are there benefits to holding EOS as a user?

From what I understand holding EOS gives developers access to RAM and possibly storage. So developers and investors hoping to launch sites will want to hold EOS. I'm very interested in EOS and want ...
7
votes
1answer
326 views

How will users login to dApps built on EOS? Will be see 'Login with Scatter' being adopted?

For consumer products, a seamless authentication can really boost the usability of the app. In the centralized world, 'Login with Facebook' standardized the login experience. In the decentralized ...
6
votes
2answers
92 views

Is it possible for a popular centralised app like Twitter to port to EOS?

If the possibility for Twitter to become decentralized on the EOS blockchain exists, what are the point-by-point steps it should take to become a dApp? What will happen to their existing users, how ...