Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d2f0f57d430334c04d21f3211d67235f8ce60265ba00701a793c95d76386e2ad:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^