Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f23651eaa551313d38f74afc2370fd5f74df6e312c28e9ac1264a49b9e67f6b3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^