Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> adac7930b8985270cee825a91fa95750fde40463eea30479d68a2fadabe8542d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^