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Results tagged with web3js
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user 9938
Javascript API and library for Ethereum To develop applications on Ethereum, you can use the web3 object provided by the web3.js library. Under the hood it communicates to a local node through RPC calls. web3.js works with any Ethereum node, which exposes an RPC layer. https://github.com/ethereum/wiki/wiki/JavaScript-API
1
vote
Accepted
Open Zeppelin PullPayment with web3
function asyncSend(address dest, uint256 amount) internal
This function has visibility set to internal. You cannot asyncSend not from solidity externally.
You should consider using code like this: …
- 3,177
1
vote
Accepted
Web3js - Cannot read property deployed()
As far as I know, when you are binding events, it should look like:
bindEvents: function () {
$(document).on('click', '.btn-create', App.createPerson);
},
createPerson: function (event) {
…
- 3,177
0
votes
Accepted
can i access latest blocks data with geth --fast --rpc?
You will have an access to the latest 1024 blocks like in a Full sync.
- 3,177
1
vote
Is there a specific token address?
First of all, you do not literally receive a token.
Inside the blockchain it will be just like adding your contract address to some mapping somewhere in the blockchain and you won't get any event or …
- 3,177
3
votes
Accepted
Should we call send function to actually deploy a contract to the network
If your question is about the order of contract deployment and usage, then:
Create contract object:
new web3.eth.Contract(jsonInterface[, address][, options])
Deploy contract with options(byte code …
- 3,177
2
votes
Accepted
Get all from ethereum blockchain
How can I do that?
First, you will need some storage to save your history texts.
string[] public saved_texts;
Second, change your funciton.
function setText(string newText) public payable retu …
- 3,177
0
votes
Accepted
Event cannot trigger when the transaction is done
If you want to watch event and not get the historic events, you should change your event declaration to:
var instructorEvent = Coursetro.Instructor();
Otherwise it would look like this:
var myE …
- 3,177
5
votes
Accepted
What are the web3 httpProvider options?
== 'undefined') {
// Use Mist/MetaMask's provider
web3js = new Web3(web3.currentProvider);
} else {
web3js = new Web3(new Web3.providers.HttpProvider("https://mainnet.infura.io/<API_TOKEN>" …
- 3,177
1
vote
web3 contract TypeError: 'apply' is not a function
This should work:
var myContract = web3.eth.contract(abi);
var myContractInstance = myContract.at("0xcbbfbafedb0eb83016d2a96a4e80d30b20fa3e30");
var result = myContractInstance.apply("4183f3a48d9 …
- 3,177
5
votes
Contract has not been deployed to detected network
Contract has not been deployed to detected network (network/artifact
mismatch)
I see many different problems with your code, but not what you mentioned in your question. I cloned your github re …
- 3,177
3
votes
Creating a contract ERC20 and sending a transaction, get balance (web3)
Yes, it is. (proof)
Yes, but you can deploy it in your private chain, so you don't need to sync and waste time. Consider using remix btw.
It can be done both ways. You can deploy it through the web3 …
- 3,177
0
votes
Error when trying to create new Solidity contract using Geth
If your error is in geth, then I can recommend you to read this article about Deploying A Smart Contract. Be sure to set your private chain correct, to have account, to have balance >0, to unlockAccou …
- 3,177
0
votes
Accepted
Call instance function of a contract from embark console
So how can I call post for accounts[1].
Remove isOwner() modifier
or
Initiate contract and send accounts[1] in parameter.
or
Add multiple owners
This is what this modifier is for, i …
- 3,177
1
vote
Accepted
Having trouble interacting with a simple contract
In first scenario, your result is BigNumber, so you just need to add .toNumber() to length:
it("should create a stuct", function() {
return MyContract.deployed().then(function(instance) {
…
- 3,177