Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8379abab826c4c7b5de8a354f013c3560e929dabff4ef4fa095f9040964f9b90:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^