Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ebe11de1621d75c9abf2d1345f30537e61c635cc7105e15b94bb229e19d81f03:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^