Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 20fab49e24dcad8473b47bbcfca2e056c23c677248f795ae5c63ba040ef497af:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^