Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3a96684a6b9fba625d42c24d666f6b9bbcd75c92a488323b0cf3d2093af46646:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^