Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 81f978bb5433915fb9812981f18e62a12451b6da6a51e1589c900f08c051cf33:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^