Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 78bfdc6dff985d872b6a9d556a7539bd8bd085891d6b49776b5dd01489f5ad40:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^