Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d1d1b159f287794b644c0b855c8dc57b8b2a0b2efb699e175c77fcccb0ede0d5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^