Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 11367aa7ff735222538bbd94d53f19bb55f4ac5bfb788c13e57e8927964c9d29:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^