Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a94055c1ea8495c57799b7cf58fcf52ca266aab3622041cad3e3a3df80aaba93:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^