Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 81301853b9c8decbe1e631bebc2ab861aa215097c9047e443c68d73c3f893a6c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^