Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 18368cd193aaac667b5327e14f5ff9a09e2b16cbdec425cfa672c4160e127cc6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^