Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dc03979bec0881f8b27de42985a73b09a1caf49305d565b2233e99d1577e2f2c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^