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Results tagged with dapps
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user 19577
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
vote
Accepted
One IDE for running a DApp
You should check out the Truffle Framework with Visual Studio Code.
This is a good place to get started: Ethereum Pet Shop
And this too: Configuring Visual Studio code for Ethereum Blockchain develo …
- 8,078
2
votes
Website to generate Ethereum Hash of a PDF file
You can use this website to create a Keccak256 or Keccack512 checksum of a file:
Source code can be found on GitHub.
- 8,078
0
votes
How to display blockchain transaction receipt details in an Ethereum Dapp
Let's assume you are using something like Web3.js as your front-end for your dApp.
You would use a function call like methods.myMethod.send() within web3.eth.Contract to call a specific contract func …
- 8,078
1
vote
Accepted
Smart Contract Balance = 0
When a contract is created, the constructor function is called to initiate the contract.
Here is the constructor function for your contract:
constructor (uint256 _initialSupply) public {
balance …
- 8,078
4
votes
MetaMask verification on a server with web3.personal.sign
I think this is what you are asking for...
Using Web3.js 1.0 and Metamask:
Create a signature for a message:
var message = "Some string"
var hash = web3.utils.sha3(message)
var accounts = await web …
- 8,078
6
votes
Accepted
Get rid of Metamask sign confirmation dialog
Signing a message is a privileged action, and MetaMask is correct to prompt the user every time they perform this action.
A signed message can be anything from a valid transaction to a "undeniable" m …
- 8,078
0
votes
Accepted
Execute smart contract only if the wallet contains some tokens
The ERC20 standard exposes a balanceOf function which will return the token balance of a given address.
In your smart contract (contract 2) you can check the balance of that address within the contex …
- 8,078
1
vote
Accepted
Blockchain Hark Fork System Impact - risk assessment and mitigation plan
Nothing happens to a deployed smart contract when a blockchain forks. It will remain a part of both chains as a part of their chain state.
At the point of the hard fork (a particular block), both cha …
- 8,078
2
votes
Solidity cross programming language method calling
Solidity is compiled into bytecode which is stored on the blockchain and run on the EVM by miners and full nodes.
There are no solidity compilers which support Solidity combined with other languages …
- 8,078