Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8f8332bd21b6621573257b638f6096b3055ffa667553e8576b89a7cb4f7e4b0e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^