Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 081523ef8f5c622d1f94524b976df477712e0c9b264c36ba52a3d68d5968da7c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^