Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 088f1c2b52afb9a0a1c7e5198cfce441b9d95ea65e6538f38430e25d69f84e3f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^