Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 891bf38ca85bdda7df45ff112c331014c788bc16f4dee61102f1cf5cd2e2d1be:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^