AUM0 v6: the law itself ages

Half of every new retirement dollar in America defaults into a target
date fund: heavy in stocks while the owner is young, sliding into bonds
as they age. The slide is called a glide path, and a committee manages
it for decades, for a fee, at Vanguard and Fidelity and everywhere else.

Here the committee is arithmetic.

setGlide()

A wallet carves its law once, with a beginning, an end, and two
allocations. From then on the target it is measured against moves by
itself, second by second, for forty years if asked.

Drift appears as the law walks away from the holdings, and the same
workers close it through the same walls as always.

accountOf answers with the law as it stands today, so every keeper,
board and desk serves an aging account without changing a line or
knowing the word pension.

The desk still crosses two wallets that want opposite sides, which
now has a name older than any of this: a young account is a buyer
of the market by law and an old one is a seller of it by law, so
the desk lets the young buy the market from the old, at the feed,
with no one in the middle.

On the live chain

One glide, carved at three ages, read at a single block:

at 25    market 9000 bps
at 45    market 5000 bps
at 64    market 1200 bps, the bond near half

A wallet one year from retirement crossed seven thousand dollars of the
market to a wallet signed today, at the feed, and the desk collected
$197.77 from the two careers. A mid-career account that slept for
twenty years was caught up through the real pools to within 14 bps of
where its law stands, in one transaction.

Unchanged

Your stocks never leave your wallet. The contract holds nothing.

Every fill is judged against the official feed, and a worker's pay
is docked dollar for dollar by whatever the fill cost the wallet.

No owner, no admin, no upgrade path. Zero fees, for forty years.

Live

Pension edition   0x4f08bdC9353060351f95207CD47D67D1cF6e5989
Chain             Hood Chain (id 4663)
Assets            USDG plus twenty six, stocks through treasuries
Web               https://aumzero.com

Seven unit tests on the glide, three more against the live chain.