Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b9808850eab8ce98c5afa04b315a3a6653f49e499086226fa9ce70c6a5e01f4e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^