Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 42ed6c1a7a43928c827becd7b5acd217a5d5f05caf2c2c006751ff9fc1c84815:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^