Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8d22ab303923c91bcda114a12c9ac1db4ecc332dd955caab6440b254ffbc8624:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^