Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 220da645e9dfa0846834e6c03b25490215b89b25c2cbed53a99f24df3eb51d28:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^