> For the complete documentation index, see [llms.txt](https://rootwood.gitbook.io/rootwood-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://rootwood.gitbook.io/rootwood-docs/amber-economics.md).

# Amber economics

### Amber economics

> Amber is tree resin that trapped and preserved value across ages — the fitting emblem for a collection named after wood.

The creator's yield is **layered like resin**, from three independent sources:

1. **Mint revenue** — all the ETH from selling Rootlings, minus only the depth the creator voluntarily seeds into the pool.
2. **Team allocation** — the 15% ROOT bag (149,850), theirs from launch.
3. **Trading fee** — a **1%** cut of every buy and every sell on the curve, forever.

And a crucial property: **the NFT has no ETH redemption.** There is no mechanism that pays mint ETH back out to holders. Once the creator earns it, it's earned. The pool's ETH comes from *token buyers*, not from the mint — so the two never cross, and the creator's primary revenue is never clawed back by someone exiting.

***

### The bonding curve

Here's the subtle part, and the reason this design is safe.

**65% of ROOT is handed out for free** — the swap bucket (50%) and the team bag (15%). A naïve linear "sell-curve" backed only by the 35% pool would go **insolvent** the instant those free holders sold into it: there simply wouldn't be enough ETH to honor the sells.

Rootwood sidesteps this entirely by using a **constant-product pool** — the same `x·y = k` invariant that powers Uniswap:

```
 price
   │                                        ╭─
   │                                    ╭───╯
   │                              ╭────╯
   │                       ╭─────╯
   │              ╭───●────╯   ← spot price
   │        ╭────╯    (a buy climbs the curve;
   │   ╭───╯          a sell slides back down it)
   └───┴──────────────────────────────────────▶  ROOT traded against the pool
```

Properties that fall out of this for free:

* **Always solvent.** The pool can always quote a sale. It just moves the price — it can never be drained to zero and left unable to pay.
* **Exactly backed.** The ETH held by the pool always backs the token side precisely; the accounting is checked to the wei.
* **Creator keeps their ETH.** Every wei of mint revenue is the creator's, except the depth they chose to seed.

> Verified by a solvency fuzz test *and* confirmed live on testnet: even after the team dumps its entire bag into the pool, all 999 holders can still swap their NFTs for tokens.


---

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