Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4addebeb332c94cdf6cb8a93280a45b686f7fb912ea75cbb34f023d8b1360ffd:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^