Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 88967c908b27a56ce93e1cc5cf6c0d4fbacbaaa9f4e133361829139a333e3093:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^