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legacy-web3
Advanced tools
Ethereum JavaScript API, middleware to talk to a ethereum node over RPC
web3.js version 0.14.0 supports multiple instances of web3 object. To migrate to this version, please follow the guide:
-var web3 = require('web3');
+var Web3 = require('web3');
+var web3 = new Web3();
This is the Ethereum compatible JavaScript API which implements the Generic JSON RPC spec. It's available on npm as a node module, for bower and component as an embeddable js and as a meteor.js package.
You need to run a local Ethereum node to use this library.
npm install web3
yarn add web3
meteor add ethereum:web3
Bower
bower install web3
Component
component install ethereum/web3.js
web3.min.js
in your html file. (not required for the meteor package)Use the web3
object directly from global namespace:
console.log(web3); // {eth: .., shh: ...} // it's here!
Set a provider (HttpProvider)
if (typeof web3 !== 'undefined') {
web3 = new Web3(web3.currentProvider);
} else {
// set the provider you want from Web3.providers
web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
}
Set a provider (HttpProvider using HTTP Basic Authentication)
web3.setProvider(new web3.providers.HttpProvider('http://host.url', 0, BasicAuthUsername, BasicAuthPassword));
There you go, now you can use it:
var coinbase = web3.eth.coinbase;
var balance = web3.eth.getBalance(coinbase);
You can find more examples in example
directory.
sudo apt-get update
sudo apt-get install nodejs
sudo apt-get install npm
sudo apt-get install nodejs-legacy
npm run-script build
npm test
FAQs
Ethereum JavaScript API, middleware to talk to a ethereum node over RPC
We found that legacy-web3 demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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