Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dea3a6ee600bc7a8bdc8bb284840b9b5699a36d2655cb610d22a61ed1c2190f0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^