Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> cc08a5d1a9286a0f399c27b2b8a0fae40ca547585d3f78ebcdedb363cf7d9649:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^