Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9659b28ecfd23eb0d80c79b912a2db6350bc652d6867ae289026a4fc2d2694a1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^