Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e6b84f343699f937b1915b4b51bf91e61359b242592ff66553c91c517c6169b5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^