SimpleDEX: fix 'Order Book' tag → 'AMM' and 24h volume showing null

[paulgnz]

Protocol

SimpleDEX — https://defillama.com/protocol/simpledex

Issues

1. Incorrect tag: "Order Book" should be "AMM"

The protocol is tagged as "Order Book" but SimpleDEX is a constant-product AMM (x*y=k), not an order book. Should be tagged as "AMM".

2. 24h volume/fees showing as null

The dimension adapter was merged in #6031 (Mar 1) and the summary endpoint is live and returning data:

GET https://indexer.protonnz.com/api/defillama/summary
{
  "dailyVolume": 48349,
  "dailyFees": 189,
  "dailyUserFees": 189,
  "dailyRevenue": 73,
  "dailySupplySideRevenue": 115,
  ...
}

But total24h on the API returns null:

GET https://api.llama.fi/summary/dexs/simpledex
{ "total24h": null, "totalAllTime": 47412 }

The adapter tested successfully during PR review (llamabutler confirmed $18K daily volume). May need a cache refresh or backfill trigger.

References

• TVL adapter: add simple dex (refactor) #18182 (merged Feb 27)
• Dimension adapter: Add SimpleDEX DEX adapter (XPR Network) dimension-adapters#6031 (merged Mar 1)

[Almost21]

The 24h metric is currently working correctly on the live API:
https://api.llama.fi/summary/dexs/simpledex

total24h is returning a valid value.

Opening a separate PR to update the tag from Order Book → AMM.