Blockchain By Example

Setting up Ethereum accounts

To interact with the blockchain network, we need to build transactions, thus we need to have a wallet. We can use an existing one, as follows:

Credentials credentials = WalletUtils.loadCredentials("PASSWORD", "/path/to/walletfile.json");

Or, we can create a new wallet: WalletUtils.generateNewWalletFile("PASSWORD", new File("/path/to/destination"), true);.

Once loaded or created, you can check the current balance of your wallet using the following:

EthGetBalance AccountBalance = web3j.ethGetBalance(credentials.getAddress(),       DefaultBlockParameterName.LATEST).sendAsync().get();log.info("The accounts balance " + AccountBalance);