Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6d752a0f964b8d6deefd54608f197e8b775f63db358d277bfdfb04799ee2b2d9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^