Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 44f4bdf3bd4fd023d6278fcae86dcd912b3491b8048c6082029c4047e6be0fda:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^