Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 147e3f52dca62517cc6176186f39081c1d2bca517e4d62e3d692703db0b9a8b1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^