Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b5064415c68c5777b37d10db6606e9276a3695cea93fd521130f733231afa84c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^