Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c6b4d2ca70f25870f1ce1e52ba360f2754ecfa0063961101363f40fff0da3155:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^