Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bc85d2e5cb4db59e99df48016d4e82034b1121511c5e870007497240ad359309:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^