Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 276a4e2681d72c685ec4ca24650c60ef77ed1af1a15b1941050851de2a770b1f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^