Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9017bcbe36ef6a202d1b22148a72a0b3ec099fc54658b8085578d7fff616cc00:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^