Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a3750854e339d3b14be25a2f3cd871414378e2e5cffee0c86b0734332fd98373:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^