Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3ac3c5866447bf14a69f27a7bbc663795fda2f7439c28c9f848f5ce799b2c29f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^