Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 68077396d36623eb3afd743ed0e3f8aa778edc300c20564cf601506b94e95048:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^