Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2b607201475aeabcc4c1efbf0a95eb3348b9bcc483a3ef3f394a148c781e7851:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^