Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9864e4653c8076c774c8a05e68b6d232f7ad14915af5d99b367505b87b9ca9fd:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^