Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 26c6f747242bfef0c2200bef7c0b9cbad682fc3f7a091645c64fb34dfbfece51:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^