Package i5.las2peer.registry

Class CredentialUtils

java.lang.Object

i5.las2peer.registry.CredentialUtils

public class CredentialUtils
extends Object

Wraps Credentials with convenience methods.

Constructor Summary

Constructors

Constructor	Description
CredentialUtils()

Method Summary

Modifier and Type	Method	Description
static String	createMnemonic()	Create new BIP39 mnemonic string using secure randomness.
static String	createWallet(String password, String directoryPath)	Create wallet file and return its path.
static org.web3j.crypto.Credentials	fromMnemonic(String mnemonic, String password)	Derive credentials from BIP39 mnemonic and password.
static org.web3j.crypto.Credentials	fromPrivateKey(String privateKey)	Derive credentials from private key.
static org.web3j.crypto.Credentials	fromWallet(String walletFilePath, String password)	Derive credentials from password-protected wallet file.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CredentialUtils

public CredentialUtils()

Method Details

fromWallet

public static org.web3j.crypto.Credentials fromWallet(String walletFilePath,
 String password)
                                               throws BadEthereumCredentialsException

Derive credentials from password-protected wallet file.

Parameters:

walletFilePath - path to standard JSON Ethereum wallet file

password - password for decrypting private key in wallet

Returns:

credentials object (with decrypted private key)

Throws:

BadEthereumCredentialsException

fromPrivateKey

public static org.web3j.crypto.Credentials fromPrivateKey(String privateKey)

Derive credentials from private key.

Parameters:

privateKey - private key from which public key will be derived

fromMnemonic

public static org.web3j.crypto.Credentials fromMnemonic(String mnemonic,
 String password)

Derive credentials from BIP39 mnemonic and password.

Parameters:

mnemonic - string of words. As defined in BIP-0039, this wallet seed determines a key pair.

password - password added to the key generation process

Returns:

credentials object (with decrypted private key)

See Also:

• Bitcoin BIP-0039 document

createMnemonic

public static String createMnemonic()

Create new BIP39 mnemonic string using secure randomness.

Returns:

string of words. Can be used to deterministically generate a key pair.

createWallet

public static String createWallet(String password,
 String directoryPath)
                           throws IOException,
org.web3j.crypto.CipherException

Create wallet file and return its path.

Parameters:

password - password with which the private key is encrypted

directoryPath - directory in which the file will be created

Returns:

full path of the newly created wallet file

Throws:

IOException

org.web3j.crypto.CipherException