question: @ Override public boolean checkAESKey ( KeyParameter aesKey ) { lock . lock ( ) ; try { if ( hashToKeys . isEmpty ( ) ) return false ; checkState ( keyCrypter != null , "Key chain is not encrypted" ) ; ECKey first = null ; for ( ECKey key : hashToKeys . values ( ) ) { if ( key . isEncrypted ( ) ) { first = key ; break ; } } checkState ( first != null , "No encrypted keys in the wallet" ) ; try { ECKey rebornKey = first . decrypt ( aesKey ) ; return Arrays . equals ( first . getPubKey ( ) , rebornKey . getPubKey ( ) ) ; } catch ( KeyCrypterException e ) { return false ; } } finally { lock . unlock ( ) ; } }
target:  Check whether the AES key can decrypt the first encrypted key in the wallet.