rfc9162-tiles

Crate docs. The module documentation includes a tested example that appends one record to a MemoryStore and checks the inclusion proof.

Stores and the log

Item	Role
`TileStore`	`get`, `put`, `create_new`, `delete`, `rename`, `list`
`PosixStore`	a directory; writes are temp file, fsync, rename
`MemoryStore`	in-process files; clones share the map
`PackStore`	one append-only file; `open`, `open_shared`, `open_read`, `compact`
`Writer`	appends entries and publishes checkpoints
`Reader`	reads entries, proofs and keys at one tree size
`TreeState`	size and root written at `.state/treeState`
`Layout`	tile widths for a tree size
`Error`	I/O, corrupt bytes, format, lock, entry length, range, signature

index::no_keys is a key function that returns no extra keys. index::identity is SHA-256(entry).

Item	Role
`Checkpoint`	origin, size, root, extensions
`Note`	checkpoint text plus signature lines
`Signer`	Ed25519 log key; `from_pem` reads PKCS#8
`Verifier`	public key and the `name+id+base64` line
`checkpoint::verify`	checks log signatures against trusted keys
`Cosigner`	witness key
`verify_cosignatures`	checks cosignature/v1 lines

The tiles how-to uses these types. Tiles and checkpoints explain the layout and the note.