Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7cd711e8b0b94e727545033c3ee457d8be184a00a19e016f67f769f709490cdf:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^