Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 171b35f23a0bf951a5a7a884e73573c58c0e534da9219a710f18a938f33b1a3a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^