Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 06c58010f5594e52b05bdba7e7ab54312225647d36ab3b635bbeda73e18eaf96:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^