Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5bf0a27f13b00d07577feb59dca9b4935f5361caecd1f3f92c83a1ed113d2caf:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^