Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8b4bdbb8066515a137662d534a1e8a1a1e6e9d74409a9246a632d2a2caf4c722:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^