Token Tutorial: How to provide an address correctly to the `mintToken` function?

Question

I worked the Token tutorial. At one stage, newly minted tokens can be supplied to a target address. However, when I provide the address from a test account on a private net (eth.account[1]), I get an error:

> eth.accounts
["0xf134f55797c344c5894d009d2784c0f32fd74199", "0x922d2931678e0641dc7d13cb38a2f0897252b0de"]
> token2.mintToken(eth.accounts[1], 1000000)
invalid address
    at web3.js:3887:15
    at web3.js:3713:20
    at web3.js:4939:28
    at web3.js:4938:12
    at web3.js:4964:18
    at web3.js:4989:23
    at web3.js:4055:16
    at web3.js:4141:16
    at <anonymous>:1:1

I got the same error, when truncating the address by the prefix 0x, as I read about somewhere else.

How else do I need to format an address to provide to a contract?

Address is valid:

> var isStrictAddress = function (address) {
....     return /^0x[0-9a-f]{40}$/i.test(address);
.... };
undefined
> isStrictAddress
function(address)
> isStrictAddress(eth.accounts[0])
true

Answer 1

If you're trying to pass a literal address (like in the mintToken function), it must be in a string and prefixed with 0x. For instance:

"0x1cF35d6a2988B959ac9104404e9985C213880c83"

Alternatively, you can pass an address from the eth.accounts array. (Note the plural variable name - "accounts" not "account".) For instance:

eth.accounts[0]

It looks like this is the web3.js code that's throwing:

var inputAddressFormatter = function (address) {
    var iban = new Iban(address);
    if (iban.isValid() && iban.isDirect()) {
        return '0x' + iban.address();
    } else if (utils.isStrictAddress(address)) {
        return address;
    } else if (utils.isAddress(address)) {
        return '0x' + address;
    }
    throw new Error('invalid address');
};

...

var isStrictAddress = function (address) {
    return /^0x[0-9a-f]{40}$/i.test(address);
};

(isStrictAddress() should pass with the address you've given above.)

Answer 2

Try to set the default account and then execute:

web3.eth.defaultAccount = web3.eth.accounts[0]

Hope this helps...!