Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2256c19a3379839e6b8dbdd60722777ddb85e32a92ee94c4955710e4c1e535e9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^