### Question:
Base58 { public static String encode(Bytes bytes) { requireNonNull(bytes); return encodeBytes(bytes.toArrayUnsafe()); } private  Base58(); static String encodeBytes(byte[] bytes); static String encode(Bytes bytes); static byte[] decodeBytes(String b58); static Bytes decode(String b58);  }### Answer:
@Test void testHelloWorld() { String result = Base58.encode(Bytes.wrap("Hello World!".getBytes(StandardCharsets.US_ASCII))); assertEquals("2NEpo7TZRRrLZSi2U", result); }
@Test void testQuickBrownFox() { String result = Base58.encode(Bytes.wrap("The quick brown fox jumps over the lazy dog.".getBytes(StandardCharsets.US_ASCII))); assertEquals("USm3fpXnKG5EUBx2ndxBDMPVciP5hGey2Jh4NDv6gmeo1LkMeiKrLJUUBk6Z", result); }
@Test void testHex() { Bytes value = Bytes.fromHexString("1220BA8632EF1A07986B171B3C8FAF0F79B3EE01B6C30BBE15A13261AD6CB0D02E3A"); assertEquals("QmatmE9msSfkKxoffpHwNLNKgwZG8eT9Bud6YoPab52vpy", Base58.encode(value)); }
@Test void testZeros() { Bytes value = Bytes.fromHexString("000000"); assertEquals("111", Base58.encode(value)); }
@Test void testZerosThenOne() { Bytes value = Bytes.fromHexString("00000001"); assertEquals("1112", Base58.encode(value)); }