Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 28e11328d681f7d35dd290ccbf62be39999d5e6e2e13d360db477af1a50292b7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^