Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 697991bd7773c71c2c9c48441f3949f2e5a7188733d288290e80cdf1ed7c1ce9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^