Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c5809b33ce5e50b85500a4f4e4c09b530e41632784008bd642991f24555521ba:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^