Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8f999b93d7d57563059412ec1373b692699701a06e5c16b3c560a5595b81f458:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^