Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> db419ce1eb6ea6ce2828d1b4cce5067b00d07fa915419eea3a120c94eac41a00:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^