Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> edb7e1eca3245ad5a2068174e4764785cfea325e919b2779752945f364f0a230:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^