Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a070b3546004fb3b0e4fc19253943249de450fd237219efba120757e0f1f5beb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^