Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 62fb80dc2c413eb25aa13e5a42d36826c13b315899ab1618ec011829c781f2d4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^