A dapp hands a wallet an `era` it encoded itself, as opaque bytes. There is no
way to render those as a variant without knowing the era algorithm, which is
exactly the kind of knowledge this crate refuses to hold — so they are accepted
as `Supplied::Raw`.
Not on trust, though. Raw bytes are decoded against the type the runtime
declares and re-encoded, and anything that does not come back identical is
refused: a short read, trailing bytes, a non-canonical compact. Appending them
unchecked would mean signing a payload whose shape nobody verified, and the only
report of that is `BadProof` from a node — which is also what a wrong key looks
like.
Also makes a single-field struct transparent whether or not its field is named,
so `CheckMetadataHash { mode }` takes `"Disabled"` the way `AccountId32([u8;32])`
takes its hex. Both wrappers are the runtime's choice, and the registry is what
says they are there.
Refs #3
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012uDUodEcRbBwNRi3UCmw8f
rob thijssen
f1c51661df
