Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2970414245628447fd582b043e84d2bdd0610f7db0fb72e68aefa2dc9b6e39cc:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^