Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1888a8174a1f67150660b8d6a5d20f3065f974d67b5fd082f05b7aab497bc881:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^