Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 66031c3704f67d7206f7921a333c9cd02b1eb52e175153e8f6a05b1598b462eb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^