Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f09ede103d517c30eca3dc178c1475cda753b43da3f0b47ab297fc62602f0aa4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^