Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> db9e2dd9ef68a696a777a36dffdbbf2c74fb7f767d09ef86744dcfca5aafa659:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^