Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> adfb17c4866669980e51a28c8c75b37ba458db8673bb1befb22b2ed056716569:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^