Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 448682c3ae7859b0d1fa4b3398149cf4fa3bab9232b90e3e7d81fc8d110549ad:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^