Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 18af8cf26dbaa78a2828577a81aad15e3d95bc1f7d45122985495518e832a643:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^