Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bf03b7096abd3a1d5e0b3ae424d76c3236116e9f9f9f52655ab1e4e826493ac8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^