Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> adc648ff9c52b33beae90865c7d6738808be2bd2e29e4c6d69a5e8f4973b3f8c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^