# yStats TVL, API, and APY Ideas
## Action Points
- **General API**
- **To Do:** Add Curve Compound Pool yVault to API
- **To Do:** Add v2 yVaults to API
- **yvWETH**
- 0x18c447b7Ad755379B8800F1Ef5165E8542946Afd
- Lend Yield Optimizer Strategy
- 0x520a45E22B1eB5D7bDe09A445e70708d2957B365
- **yvDAI**
- 0x1b048bA60b02f36a7b48754f4edf7E1d9729eBc9
- **TVL**
- **Done:** ~~Add issue to GitHub to add a new field to strategy contracts~~
- `isDelegated` or `includeInTVL`
- Boolean,
- `isActive`
- Boolean, to help identify active vs non-active strategies
- Issue here: https://github.com/iearn-finance/yearn-vaults/issues/113
- **To Do:** Update current API endpoint with TVL info, provide the data for anyone who needs it
- https://hackmd.io/A8KaWo4CS5qCip65AQpVmA?both
- This includes detailed instructions at the bottom (**Directions for API**) that should be very simple to convert to code for an API for anyone who's done this before—I just have zero experience
- **To Do:** Get this updated on DeFi Pulse, DeFi Llama, DeBank, CoinGecko and maybe even CMC
- Current DeFi Pulse Adapter
- https://github.com/ConcourseOpen/DeFi-Pulse-Adapters/blob/master/projects/yearn/index.js
- **To Do:** Updated TVL with info from v2 yVaults once people start depositing into them
- **APY**
- While APY is tracked by default in v2 vaults, still need to manually track this in v1
- **Problem:** Current API seems to use APR, not APY
- `apyLoanscan = ((1 + poolPct) * (1 + vaultPct) - 1) * 100`
- https://github.com/iearn-finance/yearn-api/blob/5c873d7dcadbc357f1e49391cf3722b0c6cda9ac/services/vaults/apy/save/handler.js#L217
- **Solution:** Instead, the following would be ideal
- Create two new `const`, `poolTrueAPY` and `vaultTrueAPY`
- `poolTrueAPY = ((1+poolPct/365)^365-1)`
- Realistically, the Curve pools are continually compounding, but 1 per day should be a fine approximation.
- `vaultTrueAPY = ((1+vaultPct/52)^52-1)`
- Again, vaults almost all compound more than once per week, but this should be a fine approximation.
- Ideally, we would set the number of periods to be equal to number of `harvest` calls per year, but we can do that later if we get bored and want to be really exact.
- `apyLoanscan = ((1 + poolTrueAPY) * (1 + vaultTrueAPY) - 1) * 100`
- I would also recommend replacing all usage of `poolApy` with `poolApr`, since this value is indeed tracking APR and not APY. The same goes for changing the name of `getApy` to `getApr`, and any other usage where APY is incorrectly used in place of APR.
- **Problem:** 3crv is missing from `pools`
- **Solution:** Add 3crv to list of `pools`
- https://github.com/iearn-finance/yearn-api/blob/5c873d7dcadbc357f1e49391cf3722b0c6cda9ac/services/vaults/apy/save/handler.js#L33
- Symbol: 3crv
- Contract: 0xbEbc44782C7dB0a1A60Cb6fe97d0b483032FF1C7
- APY in v2 yVaults
- APR is currently set to be reported at the strategy-level in v2 via the `estimatedAPR` field.
- PR waiting to merge by doggie to add 12- and 50-day EMAs of each strategy's annualied returns, as well as a debt-weighted sum of the Vault's overall annualized return utilizing the EMAs of all connected strategies.
- https://github.com/iearn-finance/yearn-vaults/pull/69