Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a89902db0e48b4bdd26f5d6c435d1a7e6d55a1b7b8331e553d7d706a94182170:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^