Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> eb91caee1f85851b098dda54f86c4add5c2e57ea88e291c6d2c19ab36759884a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^