question: public static synchronized boolean randomize ( byte [ ] seed ) throws AssertFailException { Preconditions . checkArgument ( seed . length == 32 || seed == null ) ; ByteBuffer byteBuff = nativeECDSABuffer . get ( ) ; if ( byteBuff == null || byteBuff . capacity ( ) < seed . length ) { byteBuff = ByteBuffer . allocateDirect ( seed . length ) ; byteBuff . order ( ByteOrder . nativeOrder ( ) ) ; nativeECDSABuffer . set ( byteBuff ) ; } byteBuff . rewind ( ) ; byteBuff . put ( seed ) ; w . lock ( ) ; try { return secp256k1_context_randomize ( byteBuff , Secp256k1Context . getContext ( ) ) == 1 ; } finally { w . unlock ( ) ; } }
target:  libsecp256k1 randomize - updates the context randomization