Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9b1bc40ec295b61e98954c155ddc65f53779125ff28d973471f0bfffa2a13b1f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^