Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 35a078f7a67892f3e10089c1964ac07134e375bea7c9321543635b90528c4575:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^