Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 75bc7cec613b471b9193b2dd7d29eef4419dc3eff3171bcf0cb0e27f95b04e78:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^