Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> db038976e02b12e0d30741f86afe792b41fc9506a52244ce8bc6f6f6df4d059b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^