Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fc7c8067d5210f34069a53eeab9238a96bb13e553764d9f7be3f71e33eae5edf:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^