Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2cd97eafea7ac14e7933ce8a8bcc734d20bb275d7b53b6620913ecfb083f8e4d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^