Ethereum Cookbook

How to do it...

Here are the steps that must be followed to batch requests using web3.js:

1. Creating and executing batch requests is different between versions of web3.js. If you are using web3.js v0.2x.x, use the following method to create a batch:

var batch = web3.createBatch();

2. Now, add as many requests as you want to the queue:

var balance = web3.eth.getBalance.request(    web3.eth.accounts[1],     'latest',     callback);var contract = web3.eth.Contract(abi)    .at(address)    .balance    .request(web3.eth.accounts[0], callback2)batch.add(balance); batch.add(contract);

3. Once all requests are queued up, start executing them with the execute method:

batch.execute();

4. The execution of batches works slightly different in the upcoming version of web3.js ...