Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 66125cae74fce3c08fd5ef43f4ad2b465efb22864bcad333e542961c13f6ae1c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^