Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a4d66fbd42d02ddc7f6a1520b2145afd7a0f231d6ed8c8995913adb3a04c6045:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^