3

I have testrpc initialised:

testrpc -a 10

And have connected via http from a node command line using web3 version 1.0.0-beta.27:

var Web3 = require('web3');
var web3 = new Web3('http://localhost:8545');

I'd like to be able to access the 3rd of the accounts initialised in testrpc using web3. In version 0.x.x I'd use web3.eth.accounts[3]. In the beta it seems that the process will change (docs) to use a getAccounts function.

Here's what I've attempted with the console output - I can see the list of accounts but can't seem to access them - there's possibly something simple I'm missing?

> web3.eth.getAccounts(console.log)[3]
undefined
> null [ '0xEc9F5cEF462dc92C1A04758b93Bf940142dD9AB8',
  '0xF1EB9C3FCa1e8e43597eB9Ec9204b57811317483',
  '0xCf7127dAc175E7d0cB5AB989DDCBa993Af5CC257',
  '0xddAB30A0b405FDe916060dAb961A8939bcB0292c',
  '0x76721db21AA265453BD17FCE53637D5A621AD434',
  '0x8a2D213434034DbE47501DEC88Cf2c74eaF7cA78',
  '0xBa523A69318A831F7463C88CF2e96143e4643Ae1',
  '0xDE8f72ad2221f5dc188cC2c780E256Ce0f8e16A4',
  '0x9E10ec8A473a15b37D8EcdD65d3f9c4f04f5eD83',
  '0xedc486961d350d26F8Df6D9b5CD5451Dc4ebCAc5' ]


> web3.eth.getAccounts().then(console.log)[3]
undefined
> [ '0xEc9F5cEF462dc92C1A04758b93Bf940142dD9AB8',
  '0xF1EB9C3FCa1e8e43597eB9Ec9204b57811317483',
  '0xCf7127dAc175E7d0cB5AB989DDCBa993Af5CC257',
  '0xddAB30A0b405FDe916060dAb961A8939bcB0292c',
  '0x76721db21AA265453BD17FCE53637D5A621AD434',
  '0x8a2D213434034DbE47501DEC88Cf2c74eaF7cA78',
  '0xBa523A69318A831F7463C88CF2e96143e4643Ae1',
  '0xDE8f72ad2221f5dc188cC2c780E256Ce0f8e16A4',
  '0x9E10ec8A473a15b37D8EcdD65d3f9c4f04f5eD83',
  '0xedc486961d350d26F8Df6D9b5CD5451Dc4ebCAc5' ]

I've tried a few variants of the above - the output I'm aiming for is 'OxddAB...'

What command in web3 v1.0.0-beta.27 reproduces the behaviour of web.eth.accounts[3] in web3 v 0.x.x?

I'd like to understand the reason for the proposed change, in case anyone here knows or can provide a link...

Edit - Managed to do it like this:

var a=web3.eth.getAccounts(console.log)
a._rejectionHandler0[3]

but it seems clunky/incorrect - can anyone improve?

5

when you write web3.eth.getAccounts().then(console.log)[3] the result of the getAccounts() is being passed in to console.log which is a function. The [3] bit is then being tacked on to the end which is meaningless.

const get3rdAccount = async () => {
  const accounts = await web3.eth.getAccounts()
  return accounts[3]
}

will do what you need. (or you can also use the callback approach as outlined by @Marez if you prefer)

3

web3.eth.getAccounts takes a callback function as an argument, and that callback function is called with array of accounts as one of the arguments.

The code you're looking for is:

web3.eth.getAccounts(function(error, result) {
    if(error != null)
        console.log("Couldn't get accounts');

    console.log(result); //logs all accounts
    console.log(result[3]); //logs 3rd account
});
  • 1
    web3.eth.getAccounts().then(accounts => { console.log(accounts) } appears to work just fine too. – Dave Sag Jan 19 '18 at 1:48
0

To add to Marez's answer:

a=[]
web3.eth.getAccounts(function(error,data){for (x in data){a.push(data[x])}})

then

> a[3]
0

If anyone using Ganache-cli and want to see the particular address in truffle console then you can use web3.eth.getAccounts().then((f) => f[3]) It will print the address at index 3 provided by ganache.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.