Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f38ced06b4a5d12abc7aec1b60457b8bbe411dc5a2065a9933bbb5629eab8748:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^