Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bce7d8273453e72308fce05669d07963c01e9f20575a394068075f9d79399fc8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^