Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dccd65fda1a886b0df909d41b502634d6bb28a2336e97a45d9deb38c7c57b5ae:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^