Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8dc704c9843c46ba5dbea000854ffc1621fdccad5a7eebe1143770d9d84104e1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^