public final class Schema implements Serializable {
  private int precision;
  private int scale;


  public enum LogicalType {
    DATE(Type.INT, "date"),
    TIMESTAMP_MILLIS(Type.LONG, "timestamp-millis"),
    TIMESTAMP_MICROS(Type.LONG, "timestamp-micros"),
    TIME_MILLIS(Type.INT, "time-millis"),
    TIME_MICROS(Type.LONG, "time-micros"),
    // New logical type to represent decimal in bytes
    DECIMAL(Type.BYTES, "decimal");

    private final Type type;
    private final String token;

    private static final Map<String, LogicalType> LOOKUP_BY_TOKEN;
    static {
      Map<String, LogicalType> map = new HashMap<>();
      for (LogicalType logicalType : values()) {
        map.put(logicalType.token, logicalType);
      }
      LOOKUP_BY_TOKEN = Collections.unmodifiableMap(map);
  }

  /**
   * Creates a {@link Schema} for Decimal logical type.
   * @param precision precision for decimal number
   * @return A {@link Schema} with the decimal logical type.
   */
  public static Schema decimalOf(int precision) {
    return new Schema(Type.BYTES, LogicalType.DECIMAL, null, null, null, null, null, null, null, precision, 0);
  }

  /**
   * Creates a {@link Schema} for Decimal logical type.
   * @param precision precision for decimal number
   * @param scale scale for the decimal number
   * @return A {@link Schema} with the decimal logical type.
   */
  public static Schema decimalOf(int precision, int scale) {
    return new Schema(Type.BYTES, LogicalType.DECIMAL, null, null, null, null, null, null, null, precision, scale);
  }


  /**
   * Returns precision of decimal schema.
   * @return
   */
  public int getPrecision() {
    return precision;
  }

  /**
   * Returns scale of decimal schema.
   */
  public int getScale() {
    return scale;
  }
}

// get decimal type as java BigDecimal
@Nullable
public BigDecimal getDecimal(String fieldName) {
  // convert decimal bytes to java BigDecimal based on precision and scale provided in the field schema
}

// set decimal type as java BigDecimal
public Builder setDecimal(String fieldName, @Nullable BigDecimal decimal) {
  
}

Schema schema = Schema.recordOf("x", Schema.nullableOf(Schema.decimalOf(2,2));
BigInteger bigInteger = new BigInteger("111");
// big decimal representing 1.11
BigDecimal decimal = new BigDecimal(bigInteger, 2);
StructuredRecord record = StructuredRecord.builder(schema).setDecimal("x", decimal).build();