Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ec7a44f396a78e2e046a506979a0494372553e2b9070f3d6e7452b0fa0608bb3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^