Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> df3ca352c51991be74b5ff92e5fbf66fe59593268a2300f2ce5f8ce27a0976ef:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^