Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 795c25eb968c4da5601d63a85c8d5346462dc02f0e545e663e23cdbf00f97341:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^