Three things the tier-1 case matrix needed (quantus/extension#7).
**Storage keys and values (#4).** `storage_target` resolves a pallet and item to
`twox128(prefix) ‖ twox128(item)` plus each map key hashed by the hasher the
entry declares, and reports the value type and the entry's default.
`decode_storage_value` reads the result. Nothing here knows that `System::Account`
is a `Blake2_128Concat` map over an `AccountId32`; the hashers, both types and
the default all come out of the metadata.
The `Default` versus `Optional` distinction is carried deliberately. A `Default`
entry that the node returns nothing for means the declared default — an account
nobody has funded reads as a zero balance — where an `Optional` one means
nothing. A wallet that conflated them would report a failure for an account that
simply has no money in it.
**A call nests inside a call.** A multi-field variant with named fields only
accepted a positional array, so `Utility.batch_all` — whose `Vec<RuntimeCall>`
holds calls spelled exactly like top-level ones — could not be encoded at all. It
now takes the same object form at any depth.
**Every integer renders as a decimal string**, whatever its width, and that is
now stated rather than incidental. A u128 balance does not survive a JSON number
(12 decimal places puts ordinary amounts past 2^53) and `scale_value` widens
every unsigned integer to u128, so the width is not available to switch on.
Emitting a number when it happens to fit and a string when it does not would make
a consumer handle both shapes for the same field depending on the value.
All of it proven against Heisenberg: an ML-DSA-65 account funded by a `batch_all`
whose payload crossed the 256-byte BLAKE2b threshold, then signing and being
included itself.
Closes#4. Refs #3
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012uDUodEcRbBwNRi3UCmw8f
rob thijssen
e6ff57a334
