Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fdbf452d21cbbf3ac98f0df95b797a030e6f3a29ff2d98c189377173baeed826:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^