Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 25910bbe07307bd7a1bf2eb00b3050b5395a65bc5ac68192883b4e654609c8ff:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^