Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bf809a727f565dbe8990da462481f868452fbb9cab3bff3eaacfec86cd419759:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^