Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 341e9754e837b833b85cc935a61c00b5ecc79853ae153258dc5c3bf5ef8e76e7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^