Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fa135f26e53347f1795bd2ccd7c6f6a6c0b926c32d1f42a53f858f10ee1216d6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^