Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5bee51f52234f676f4d9cf7a2275d0ab5d0f93d0f849abab302fe8aa577632ed:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^