Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d4d7660b0f38cf33277a57d90ebb1d8da3e4184971feffa9549040beaef97a2d:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^