Questions tagged [drizzle]
The drizzle tag has no usage guidance.
1
vote
1answer
9 views
How to initialize empty Drizzle instance and later provide contracts data
Following Drizzle documentation, Drizzle instance can only be created with:
const drizzle = new Drizzle(options)
Where the options is mandatory. And trying to not pass options will generate an error:...
0
votes
1answer
6 views
drizzle.contracts is empty object after creating new instance of Drizzle
After creating a new istance of Dirzzle and passing the needed options:
const drizzle = new Drizzle(options);
The object drizzle.contracts is an empty object instead of being an array of the ...
0
votes
1answer
7 views
Call `getPastEvents` with Drizzle raise error: “getPastEvents is not a function”
Calling getPastEvents with Drizzle will cause the exception:
TypeError: this.drizzle.contracts.Contract.getPastEvents is not a function
How to get all the past events in an array (in-one-shot) ...
0
votes
0answers
5 views
drizzle not updating events properly - duplicate events
I'm facing a peculiar problem while rendering event values in a component using drizzle. When a new event is created and is updated in the events array of drizzle (drizzleState.contracts.MyContract....
0
votes
0answers
13 views
How to handle events using drizzle?
strange that after much searching, i havent found even one piece of info out there which clearly elaborates on how the events are manipulated in drizzle. From what i understand, the event names (and ...
1
vote
0answers
26 views
How to get the returned value of a smart contract function when it called by using cacheSend() in drizzle
I just tried to build a simple DApp using truffle, react and drizzle. My question is how to get the returned value of a smart contract function when it called by using cacheSend() in drizzle? As ...
0
votes
0answers
13 views
using <DrizzleContext.Consumer> re-renders the component infinitely
I'm trying to build a simple dapp using drizzle-react's 'DrizzleContext'. This is how my index.js file looks like:
import React from 'react';
import ReactDOM from 'react-dom';
import { Drizzle, ...
0
votes
1answer
21 views
How to send context from DrizzleContext.Provider to a Class Component / Class Container
I'm using the new Context API supported 'drizzle-react' library in my dapp. Can anyone please clarify how to receive the context sent from DrizzleContext.Provider into a "class" component? Check out ...
0
votes
1answer
176 views
Could not find “store” in either the context or props of “Connect(c)”. Either wrap the root component in a <Provider>
i'm trying to create a drizzle-react app which uses the new DrizzleContext component but running the following error in my 'localhost:3000':
> Could not find "store" in either the context or ...
0
votes
1answer
48 views
dApp Tech Stack
So I'm looking into building a dApp with standard app I functionality like user login/posts/likes/comments etc. Along with harnessing the power of ethereum to support betting and donations. Here is ...
2
votes
1answer
34 views
TruffleContract At() function with Drizzle
I am learning the Drizzle framework after I did a project using TruffleContract abstractions in Javascript (DApp).
I have multiple instances of a contract and I am not able to access at the instances ...
1
vote
1answer
143 views
How to return array from struct using drizzle?
So I have been wondering how to return an array from a struct in drizzle, I can make multiple calls using web3, but it is kinda complex and would like a simpler approach. A simplified contract is ...
1
vote
0answers
78 views
How to update drizzle-box app to handle metamask no longer injecting web3?
I was reading about the latest and greatest metamask changes, and was wondering how I can update one of my dapps based off the truffle drizzle-box to be compatiable with the new metamask changes.
For ...
1
vote
1answer
30 views
Starting Ethereum Development [duplicate]
Sorry for vague question but just looking to get some insight. I have just began developing a dapp for the ethereum network and I need some advice on what development frameworks/technologies to use.
I ...
0
votes
1answer
218 views
How to write a component in Drizzle React? [closed]
The components are for the following functions:
function tokenURI(uint256 _tokenId) public view returns (string) {
require(exists(_tokenId));
return tokenURIs[_tokenId];
}
function ...
1
vote
0answers
93 views
How to update react component state with Drizzle
I'm using react and drizzle and want to update the classes state based on data returned from a call to a contract. I'm using the standard pattern from the drizzle box and here (https://itnext.io/how-...
4
votes
1answer
263 views
Having issues using the Drizzle library in React
Using Ubuntu 16.04
Greetings, all
I was following the tutorial for getting Drizzle up and running located here. I advanced to this step when I attempted to run the app using the "npm start" command ...
1
vote
0answers
184 views
Uncaught at initializeDrizzle TypeError: Cannot read property 'apply' of undefined
I am working a Drizzle truffle box project, and this is my first intro to React so I am struggling a little bit. I keep getting this error and I cannot for the life of me seem to fix it.
The ...
1
vote
0answers
192 views
How to instantiate and interact with a contract in web3, metamask and drizzle, given the ABI and the address?
I have a method on a Contract A which I am calling (in my dapp). This method in turn instantiates a second Contract B and emits an event with contract B's address.
I then use this address, along with ...
3
votes
1answer
309 views
Drizzle cacheCall is not updating data correctly
I have a react component which is interacting with a solidity contract via drizzle. I store a cacheCall index in the constructor:
this.opcTokenCacheCallIndex = context.drizzle.contracts.OPCToken....
2
votes
2answers
184 views
Drizzle and mapDispatchToProps not working
I'm still struggling with Drizzle, trying to dispatch my own action. Based on the Drizzle box, I added the following to HomeContainer:
import Home from './Home';
import {drizzleConnect} from 'drizzle-...
3
votes
2answers
677 views
How to Listen to Contract Events in Drizzle
Let's take the example of the SimpleStorage contract that comes with the truffle box drizzle-box
How can we listen to the event StorageSet and console.log it to the JS console?
drizzleOptions.js
...
1
vote
1answer
172 views
can't access web3 object in Drizzle Box
I am building a DAPP based on drizzle box. I am struggling to find out how can i get the web3 instance without initiating a new one
I want to end up with something like :
this.props.web3.eth
Thanks
2
votes
2answers
85 views
Is drizzle a contracts lib?
I'm researching about smart contracts, and been seeing a lot of truffleframework, ganache and drizzle. In the other hand, only found broad descriptions of those tools:
"Drizzle is a collection of ...
1
vote
0answers
110 views
set default amout to transaction
I have a ticket system where you can buy some tickets to an given price. I want to set the amount to the method and send it back to the contract. For this I'm using metamask but I don't really get, ...
0
votes
0answers
71 views
Truffle Drizzle React returns string when expecting a number
I have a method in a contract which returns a uint:
function numberTest() public pure returns(uint) {
return 10;
}
However when I call the method from my React component it returns ...
3
votes
1answer
334 views
How can I access the address of a contract in a drizzle dapp?
I've started working from the drizzle box and can access functions within contracts, but if I want to give an allowance to a contract address so it can use users tokens how can I give the correct ...
0
votes
1answer
563 views
How to access web3Instance when using Truffle's Drizzle
I'm working on a dapp with the boilerplate created by running truffle unbox drizzle and need to call functions provided by the web3 instance.
Is there a way to access the web3 instance object? All we ...
2
votes
1answer
244 views
Truffle: cannot use drizzle for communicating between react app and blockchain
I am using Truffle for writing smart contract and using drizzle and drizzle-react for communicating with smart contract.
I have configured as tutorial said. After that, I try to print out:
this....
0
votes
0answers
50 views
How to block AppContainer from being initialized if MetaMask is not installed?
I am following this tutorial to create a simple Dapp using React. So far everything looks fine except when I tried it on my another browser that doesn't has MetaMask installed.
Before that, this is ...
6
votes
1answer
421 views
Truffle unbox drizzle not working properly
truffle version = 4.1.4
truffle unbox drizzle
truffle compile
truffle migrate
npm run build
npm run start
this gets me this error:
Truffle Drizzle-box fails with TypeError: (0 , _drizzle....
1
vote
2answers
558 views
Drizzle Contract call returns unexpected object
I have a view function in my smart contract that returns a uint.
In the Truffle Drizzle javascript page I make the call when the page loads:
this.contracts.TheContract.methods.getNumber.call()
I ...
4
votes
4answers
421 views
Truffle Drizzle-box fails with TypeError: (0 , _drizzle.generateContractsInitialState) is not a function
Right after unboxing Drizzle-box I'm getting a
TypeError: (0 , _drizzle.generateContractsInitialState) is not a function.
Ganache is running on localhost:8545, contracts are deployed, Metamask ...
1
vote
0answers
225 views
Drizzle React Component ContractData for array returns empty
<ContractData
contract="TheContract"
method="getData"
methodArgs={[accounts[0], "0", { from: accounts[0] }]}
/>
and a contract view function
function getData() public view returns (...
1
vote
0answers
299 views
Drizzle React Component ContractData returns empty
My contract call to a simple view function that returns an array of data returns empty using:
From testing it appears that ContractData can't deal with more than one return value. If I return one unit ...
0
votes
0answers
142 views
Truffle Drizzle: Passing String address results in Invalid Number of Parameters
I have a view function in my contract that takes an address as a parameter and returns a uint:
function getNumber(address _address) public view returns (uint) {
require(_address != 0x0);
...
1
vote
1answer
309 views
Truffle Drizzle ContractData call keccak256 error
I started with truffle unbox drizzle
then made use of my contract.
I can make use of the ContactForm without error in App.js:
<ContractForm
contract="TheContract"
method="addData"
labels={["...
