Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 79d84f3af0ef9c85fe758633643a63768e166c44248690c3de7d65225adb97e4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^