Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0ddb67527bc54732479f186b2999b2a303e28af3aea49f542ef462ee146afb73:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^