Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1c521722bb46c5970432286054266a30b15791a74f8e2191a050030cfb8d9e46:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^