Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ab187ada29ca00982527c229ad5e7f8f2b666456c75d7a3a64304cf55d98be1f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^