Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a69e27b762f66de8499079f8e2a01b192ae83e0781cda4209cef21f224f94b8d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^