Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0ca8e796ba3a3302e0bce053d68123083d71a661d7445ba0e2ed08af8220b422:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^