Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4fa0bb3084eb1294a1cc7f19171da763d36950373bdc6524a7fad6200aeda313:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^