Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c6d537b82d929592d57c0a79a56d6bba91b66a7a15a334d9bef9efbce3128699:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^