Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> eb3e70f2d2c6f576565761d8ac5d00ceebe9caf6d5a65a5821775c147fc4779b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^