Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5d3419e67eb1dc2f002f166519bdcc459868599371de6508c60eddaa93f0b006:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^