Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 745411ef3d7f529f21158e5be69d841017baefa04a66c56a818ad15f09a1f7dd:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^