Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 254bdb0bac34a0335c5c01946b5316f6cbc0478c188fae712a0743ffc7594322:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^