Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bc6f16e6ef4fe16948d4223decdd31b00f23488ebc23bea112f799d2d56f5fb6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^