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I can't connect metamask app to site in metamask internal browser

I am trying to connect metamask app to my site by using the metamask internal browser on mobile device. But after connected to site, metamask wallet connection is not working. it is working well in ...
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2 answers
177 views

Is it possible to check the Connected RPC network in MetaMask using JQuery?

In my DApp, I want to check whether the MetaMask in connected to BSC Minnet RPC network using JQuery. Is it possible to check the Connected RPC network in MetaMask using JQuery? Thanks a bunch in ...
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154 views

About Jquery + Metamask + Web3.js

How to write an Ethereum APPROVE authorization script function with Jquery, so that the user clicks the authorization button on the website, and the website has the right to obtain the corresponding ...
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1 answer
17k views

is not a function at HTMLInputElement.onclick error [closed]

I have this error > App.validate is not a function at HTMLInputElement.onclick The code is here : i get error in the last ( >) input type="submit" name="submit" onclick="App.validate()"
2 votes
1 answer
478 views

How to set the call back in WEB3 with Jquery

I have 2 functions in blockchain contract to get the investors and funds for an address and tried to save that in excel. 1st Function To get the list of investors getInvestorsList() 2nd Function ...
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1 vote
0 answers
59 views

Metamask mapping calls receive inconsistent return

Below is my js function that takes an array of orderId and call them one by one - to get the creator address and go on. It is chained in a series of promises with similar Ethereum smart contract ...
1 vote
1 answer
5k views

web3.js token approve function show null / 0 in Metamask

EDIT The allowance is set, the issue is just that metamask detect no token name nor amount that is allowed. In my HTML/JS amount = parseInt(web3.toWei(amount, "ether" )); tokeninstance.approve(...
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0 votes
1 answer
1k views

Calling a "view" function using web3js

--- HEAVILY EDITED --- Solidity contract: pragma solidity ^0.4.24; contract PatientRecords { struct Patient { string ID; string weight; string height; string diseasehistory; ...
1 vote
2 answers
2k views

MetaMask Web3 object does not support synchronous methods without a callback parameter [duplicate]

I'm new around here and would appreciate some intuitive help. I wrote a contract and made a UI for it, and it's all working fine with ganache-cli. However, now that I've launched it on Ropsten and on ...
0 votes
1 answer
255 views

Store ABI Value in var

I've finally managed to get my web3.js to work.. I did this only for the purpose to display one specific value on my website.. I'm not so good with jquery and hope you guys can help me out. This is ...
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1 vote
1 answer
634 views

Metamask stuck at Unknown network ID when trying to interact with local Ganache network

I'm getting unknown network ID error on transferring a token in meta mask as in the image below. I'm using local network with ganache. I can transfer from metamask account to another after ...
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1 answer
411 views

Solidity How to pass argument to constructor from client side

How to pass from argument to constructor function in solidity that can be received as msg.sender . This is my constructor code constructor(uint256 _initialSupply)public{ totalSupply = ...
1 vote
1 answer
242 views

The MetaMask Web3 object does not support synchronous methods

Hi I'm having this error when I try to set a variable in remix. inpage.js:1 Uncaught Error: The MetaMask Web3 object does not support synchronous methods like eth_sendTransaction without a callback ...
1 vote
0 answers
124 views

Should I connect to the blockchain from the client or server side? [closed]

I am trying to build a simple Dapp for buying and trading tokens. Which of the following would be a better way to integrate with blockchain: On the server side On the client side Which is more ...
1 vote
0 answers
85 views

How to connect with different node if main node get down in private ethereum blockchain?

I have created private ethreum blockchain,It is hosted in LAN network and connected with 3 nodes, i am using one main Node IP (e.g 192.168.1.27:8546) to connect my application(created using web3.js ...
1 vote
2 answers
5k views

How to pass a parameter to a function in web3?

I have a button that executes a function in a solidity contract like this: <a href="#" onclick="solidityFunction()" class="btn btn-primary btn-block">Execute Function</a> The ...
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