Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5cc292365c035ac95969e05afc57e85ab63c99e5ffab20337892029a97b70a2e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^