Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0e658e7c4c22973cd337bfba51b2a4fc41b0585874a7ad116122a571f00f03b0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^