The avatar for @consensys-academy
ConsenSys Academy
The educational core of the Ethereum movement
Published
Edited
Nov 8, 2019
3 stars
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
ethereum.enable()
Insert cell
Insert cell
Insert cell
Insert cell
Web3js = require("https://cdn.jsdelivr.net/gh/ethereum/web3.js@1.2.0/dist/web3.min.js")
Insert cell
Insert cell
Insert cell
web3js = new Web3js(web3.currentProvider)
Insert cell
Insert cell
Insert cell
transaction = ({
from: web3js.givenProvider.selectedAddress,
to: "0x07D62a36D35261AfEcF6cb89382D393a398edc1a",
value: web3js.utils.toWei("0.01", "ether")
})
Insert cell
Insert cell
web3js.eth.sendTransaction(transaction)
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
web3js.eth.getBalance(web3js.givenProvider.selectedAddress)
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell
ABI = [
{
"constant": false,
"inputs": [
{
"internalType": "uint256",
"name": "x",
"type": "uint256"
}
],
"name": "set",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"internalType": "uint256",
"name": "newValue",
"type": "uint256"
},
{
"indexed": false,
"internalType": "address",
"name": "updatedBy",
"type": "address"
}
],
"name": "storageUpdate",
"type": "event"
},
{
"constant": true,
"inputs": [],
"name": "get",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
}
]
Insert cell
Insert cell
simpleStorage = new web3js.eth.Contract(ABI, simpleStorageAddress)
Insert cell
Insert cell
Insert cell
Insert cell
simpleStorage.methods.get().call()
Insert cell
Insert cell
Insert cell
Insert cell
simpleStorage.methods.set(42).send({from: web3js.givenProvider.selectedAddress})
Insert cell
Insert cell
Insert cell
Insert cell
simpleStorage.events.storageUpdate((error, event) =>console.log(event))
Insert cell
Insert cell
Insert cell
Insert cell
Insert cell

One platform to build and deploy the best data apps

Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.
Learn more