Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 234452b27366710b018b6a76f95e3dfafb20cc61bfd7b4a0ffeb275b70f88217:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^