Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> be3b2e6c84aea8f071e97600bac3f19e4b300f972be6ac836432e2e71fa42653:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^