Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e6a62ccc6be5a91fa49c57c7cd33c805ea232b558bedecbca92371ddec165217:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^