Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0bc2e42fa188654e4de0f2ec2771a6cd615894835dc3d3037acaa16527b14065:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^