Altar

Altar is one vault and one hybrid token. Every decision below follows from something measured on Robinhood Chain, and the ones that matter are the ones that could not have gone the other way.

i · The mechanism
ii · The ramp, and why the two sides differ

A buy opens at 25% and a sell at 49%. Both fall in a straight line to 1% over 300 seconds, and past that a trade is an ordinary trade in both directions, for good.

The clock starts at the first trade, never at pool creation. A ramp started at deployment burns down against an empty pool, and the first real buyer arrives to find the resting rate already waiting: the window would exist only on paper.

The two sides are not the same number on purpose. In the first minutes the only person who can sell is somebody who bought seconds earlier at a price nobody else could get. Charging that exit what an entry costs would price the two as if they were the same act.

Nothing about either rate is settable. Both endpoints and the window are constants in the bytecode, and there is no owner function that touches them.

iii · What cannot happen

There is no sell path. No sell, no withdraw, no rescue that reaches NVDA or SPCX, and no owner function that moves them. The single exit is sacrifice, and it pays the caller their own share and nobody else's. The test asks the contract for eight such selectors and asserts that none of them answers.

The route is pinned. The router, both pool fee tiers and all four token addresses are constants. Nothing about the swap comes from the caller, because a settable spender with free calldata is a back door however small the cap around it looks.

The slippage bound is measured, not passed in. It is computed from each pool's own stored price. A caller-supplied minimum of zero is an invitation to a sandwich, and these are sums worth sandwiching.

iv · Why these two names

Measured on 1 September, the USDG in each tokenised stock's deepest pool:

NameUSDG in poolVerdict
NVDA3,429,152admitted · 70%
SPCX683,099admitted · 30%
AAPL83,216too thin
MSFT73,863too thin
AMZN63,212too thin
GOOGL32,934too thin
AMD10,297too thin
META7,499too thin
SPY·no USDG pool at all

A factor of 457 between the deepest and the thinnest. The bridge the whole design rests on is WETH against USDG at the hundredth-of-a-percent tier, which holds nearly five million dollars.

v · Honestly