Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e4386118a31aaa82fabe762bbe66bca60e1336226a137f53ed79c6190323e116:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^