Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dd2a713381e7c7415f58e0ec1b7331a970db09fd2a510c12fd5d3e3640266557:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^