Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> aa48f13a439b6e9d49b0f573ca0d1445f46d92ef9d8168032ec3f539dd2588ae:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^