Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 03b8e7d6f4f594f900f509368c664b1f27abc1d5f8e7430e2387b88e58f0efe0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^