Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7130bb92e984178c3c8b568f0f719a33d43dcbe33b57bca620ffed16c8ece950:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^