Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d0e5bb5f00c9982d827bd9991670fcb0c8562d230ee3dd7381553c778cf55f63:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^