Client and backend. This class is shared: the same code is compiled into your app and into your server, so everything on this page works in both.
public final class PersonalSign
- Object
- PersonalSign
EIP-191 personal_sign messages, the “Sign in with Ethereum” and wallet-ownership proof,
and the 65-byte r || s || v signatures EVM wallets exchange.
v is written as 27 or 28, the form personal_sign and eth_sign return; the
recovering methods also accept 0 and 1.
Methods
public static byte[] hash(byte[] message) | keccak256("\x19Ethereum Signed Message:\n" + len(message) + message). |
public static byte[] hash(String message) | hash of a text message, UTF-8 encoded. |
public static byte[] sign(byte[] message, byte[] privateKey) | Signs a message as personal_sign does. |
public static byte[] sign(String message, byte[] privateKey) | Signs a text message as personal_sign does. |
public static EvmAddress recover(byte[] message, byte[] signature65) | The address that signed a message. |
public static boolean verify(String message, byte[] signature65, EvmAddress address) | Tells whether address signed the text message. |
public static byte[] signHash(byte[] hash32, byte[] privateKey) | Signs a 32-byte digest, answering r || s || v with v 27 or 28. |
public static EvmAddress recoverHash(byte[] hash32, byte[] signature65) | The address whose key produced signature65 over a 32-byte digest. |
Inherited methods
Method details
hash
public static byte[] hash(byte[] message)keccak256("\x19Ethereum Signed Message:\n" + len(message) + message).hash
public static byte[] hash(String message)hash of a text message, UTF-8 encoded.sign
public static byte[] sign(byte[] message, byte[] privateKey)Signs a message as
personal_sign does.sign
public static byte[] sign(String message, byte[] privateKey)Signs a text message as
personal_sign does.recover
public static EvmAddress recover(byte[] message, byte[] signature65)The address that signed a message.
Throws
IllegalArgumentException- for a malformed signature
com.codename1.security.CryptoException- when the signature recovers no key
verify
public static boolean verify(String message, byte[] signature65, EvmAddress address)Tells whether
address signed the text message.signHash
public static byte[] signHash(byte[] hash32, byte[] privateKey)Signs a 32-byte digest, answering
r || s || v with v 27 or 28.recoverHash
public static EvmAddress recoverHash(byte[] hash32, byte[] signature65)The address whose key produced
signature65 over a 32-byte digest.