Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7db75f0d91b978cde2b0544d2c820b2eaa820fa71784be3c6903b5b581b47153:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^