Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b1c718dce7906a97734cfd47211225648c5beafc931e9af584cb2fdcda38be44:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^