Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7f54c1967661ffded10cab4e67573221f6d79af62d01b467a7e0b5d14f5c670f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^