Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 86a8532ea845d48f65f658508164eae06a821f37b4cc2493d6772df0ab73350a:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^