question: public static boolean verify ( byte [ ] data , byte [ ] signature , byte [ ] pub ) { Preconditions . checkArgument ( data . length == 32 && signature . length <= 520 && pub . length <= 520 ) ; ByteBuffer byteBuff = nativeECDSABuffer . get ( ) ; if ( byteBuff == null ) { byteBuff = ByteBuffer . allocateDirect ( 32 + 8 + 520 + 520 ) ; byteBuff . order ( ByteOrder . nativeOrder ( ) ) ; nativeECDSABuffer . set ( byteBuff ) ; } byteBuff . rewind ( ) ; byteBuff . put ( data ) ; byteBuff . putInt ( signature . length ) ; byteBuff . putInt ( pub . length ) ; byteBuff . put ( signature ) ; byteBuff . put ( pub ) ; return secp256k1_ecdsa_verify ( byteBuff ) == 1 ; }
target:  Verifies the given secp256k1 signature in native code. Calling when enabled == false is undefined (probably library not loaded)