Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9ed27a754204527b46569ee86a8e0145a42d5f5c080da18c88d5f7abc14e842a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^