Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 63ee513d0bc6cd0083efe00e346d82cbd19ef1a04d9304173516e803ea2c0f1e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^