Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 32a0b46b11cf780f62fc21485ce6ef32a9c8d7408482caef82076f16b279a3b4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^