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javascriptnode.jsrpcethereumsolidity

Invalid JSON RPC response: undefined

I'm trying to create an Ethereum account through Node.js. This is my code:

export async function createNewAccount() {
    var web3Instance =  new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
    return web3Instance.eth.accounts.create();
}

But I'm getting the following error (from 'create' function):

Invalid JSON RPC response: undefined

I have installed web3.js in my project.

What other step have I missed?

BTW opening the browser on address http://localhost:8545 returns 404. Is there anything I need to install in order to make it work? Is that the testrpc?

Notice that I want to work against the real blockchain, not a test one.

Solution

  • Web3.js is only a javascript interface that can deal with a real node, in order to conduct RPC requests you must have an ethereum node running this can be either TestRPC , Parity , Geth. additionally, since you are pointing to localhost you will need to run it on your own

    The easiest for you to test with will be testRPC install and run it will. By default give you 10 accounts. in order to create a new account with testRPC you will need to run it with --unlock option