Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 864fa1db494ea3c501dd385245d6e24f84d7ff4ba043814dbe977a1a709eb2ff:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^