Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 96b8a2a03c2b8d851d5ba2e87c680268fdee56d7fb0450d6df92b922444fbedc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^