Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 36707cd55b9705632bb3c3c6b8887375d907792a63243f3e4d5d8e6b429414b0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^