Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c1cffad3bcd55b7328d649f40b3dec9665a7bf42a33193c19e8ab2b32a799124:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^