Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 894d1222b24cee9c10f9830b4caeb9cd3dd159dfae30cf57e62d2abde5ce5293:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^