Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 177a10851b3aaa3b6394ad0cb55d67b765ae540192100841793f814e235d9ae7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^