Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ede993dbee5d12d7ffed532557d1f992db1bb227348bd1452981b649157aea9f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^