Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e41cda799cbf6df3f20c4daf53375980187316c058fe39094404e262319a8ad3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^