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libpure-link.a holds them; pure-serve and the M5 harness link it instead
of naming its source files.
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A rows field's JSON value is an array of objects naming the record's
fields (numbers, strings; a field left out takes its default). The
connection thread encodes them as the list's stored form, which may be
longer than the JSON, grows the request's input by that much
(pure_runtime_grow: charged to the payload budget as admission charges an
input, 503 payload_budget when it does not fit) and places them after the
body, so the owner still applies a message it need not parse. A message
whose only variable field is rows takes a body that is not JSON as those
rows in their stored form: a bulk insert without JSON. An API's answer
(--reply) gives rows the same way. A delivered batch holds no rows.
server_rows loads 30,000 stock rows in one JSON request (some 250,000
rows a second, against 6,500 with a request a row) and 20,000 more as
bytes, refuses a load with a key already there whole (409 exists), then
checks 400 random orders against a model (294 applied, 106 refused with
none of their rows applied), texts with escapes and Korean, a walk that
removes, and a restart that keeps every state and no rows.
The format's document (008) describes walks, rows fields and lists of
rows, and OUTER_ROW.
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A sealed request cost three X25519 operations (about 0.5 ms), so sealed
sends drained at half the plain rate. A wire now keeps one HPKE context,
encapsulated at its first seal, and seals each request as the context's
next number (a failed seal or a restart starts a new session); the
header carries the session's encapsulated key and the number, so a
receiver opens a session once per connection thread (16 remembered, the
least used replaced) and each seal by its number, also after it restarts,
unasked. A sender with a key of its own seals in HPKE auth mode and names
that key in the header; a receiver started with --sender NAME=KEY takes
deliveries only from the senders it names, each sealed with its key
(403 sender otherwise). The body is now the ciphertext and its tag.
Sealed sends, sender authenticated, drain at 461-464k a second against
462-470k plain and 207-234k sealed a request at a time (Raspberry Pi 5).
The check adds: a wire's requests share one session numbered from 0; a
changed number or sender key does not open; a receiver restarted naming
its sender opens the same session again; another node claiming that
sender's name with its own key is refused and applies nothing.
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Linking OpenSSL cost every pure-serve 2.3 MiB of resident memory, 0.66
MiB of it the process's own (relocated data), though most servers never
reach an https receiver or seal a send. The code that uses OpenSSL (TLS
to https receivers, sealing) is now built as pure-crypto.so beside
pure-serve and exports one table; pure-serve maps it the first time a
wire to an https URL opens or a key is read or a seal wired
(serve/crypto.c), and a missing library is reported at startup. What
needs no OpenSSL, a key's hex and the suite this CPU seals with, stays in
pure-serve.
An idle server: RSS 4,496 -> 2,320 kB, PSS 1,639 -> 881 kB, private
dirty 1,296 -> 864 kB. A static OpenSSL was measured too and is worse
(RSS 3.8 MiB, but 2.3 MiB private: all of its tables relocated). The
checks, https webhooks and sealed sends included, pass unchanged.
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--seal OUTPUT=KEY seals each request's body whole to the receiving node's
public key with HPKE (RFC 9180, base mode: X25519, HKDF-SHA256, AES-128-GCM
where the CPU has AES, else ChaCha20-Poly1305), bound to the request's
source, first number and count; X-Pure-Seal names the suite. A receiver's
--key is a raw 32-byte file, made 0600 when missing, held in OpenSSL's
secure heap; it opens the body where it lies (400 seal when it does not
open) and zeroes the plain text when the request's ticket goes.
--sealed-only refuses unsealed deliveries (403 unsealed).
The check puts a recording relay between two apps: every order applies
once, no body shows an item or a field name, a flipped bit is refused, a
replayed request applies nothing twice, and a seal to another key does not
open. Its hosts choose their own ports (--port 0). Sealed sends drain at
233-235k a second against 469-470k plain (Raspberry Pi 5): three X25519
operations a request, 164 us each. The plain request path measured the
same as before.
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A batch went out as a write for its head, then a bracket or comma and the
send for each of its sends: two writes a send. Now the head and the whole
body are built in one buffer and written once. A receiver stopped while
20,000 sends piled up drained them at 91k sends a second before and at
470k after (three rounds each, Raspberry Pi 5). Writing the head apart
from the body measured the same (468k), so the gain is the body's; one
buffer is kept as the simpler of the two, and a lone send now leaves in
one segment instead of two.
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The app model, the tree store and the HTTP host lived in
prototypes/connections among the earlier document runtime, the store was
known only by its format's name, and Vega compiled six Pure sources by path.
Now, as the README's principle has it:
core/ runtime, flow and the app model (module*.c), with what the core
asks of storage (state.h, store.h)
store/ the tree store (PURETRE3, PUREREC1)
serve/ pure-serve: HTTP host, outbound delivery, JSON in place
cli/ pure-run, pure-edit-module
A top-level make builds libpure.a (app model and store, for hosts to link)
and the hosts; make check runs the store's and the app model's tests. The
earlier runtime still builds from prototypes/connections against core/ and
store/ (check, check-tree and check-core pass). Design 009 records the rule:
parts by role behind libraries; git repositories split by coupling, so the
store stays here while its contract moves with the core, and Vega stays apart.
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