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42e0aa43d1
* persistency: per-job SQLite-backed storage layer (singleton, brokered)
Adds a backend-neutral CRUD library at waku/persistency/, plus the
nim-brokers dependency swap that enables it.
Architecture (ports-and-adapters):
* Persistency: process-wide singleton, one root directory.
* Job: one tenant, one DB file, one worker thread, one BrokerContext.
* Backend: SQLite via waku/common/databases/db_sqlite. Uniform schema
kv(category BLOB, key BLOB, payload BLOB) PRIMARY KEY (category, key)
WITHOUT ROWID, WAL mode.
* Writes are fire-and-forget via EventBroker(mt) PersistEvent.
* Reads are async via five RequestBroker(mt) shapes (KvGet, KvExists,
KvScan, KvCount, KvDelete). Reads return Result[T, PersistencyError].
* One storage thread per job; tenants isolated by BrokerContext.
Public surface (waku/persistency/persistency.nim):
Persistency.instance(rootDir) / Persistency.instance() / Persistency.reset()
p.openJob(id) / p.closeJob(id) / p.dropJob(id) / p.close()
p.job(id) / p[id] / p.hasJob(id)
Writes (Job form & string-id form, fire-and-forget):
persist / persistPut / persistDelete / persistEncoded
Reads (Job form & string-id form, async Result):
get / exists / scan / scanPrefix / count / deleteAcked
Key & payload encoding (keys.nim, payload.nim):
* encodePart family + variadic key(...) / payload(...) macros +
single-value toKey / toPayload.
* Primitives: string and openArray[byte] are 2-byte BE length + bytes;
int{8..64} are sign-flipped 8-byte BE; uint{16..64} are 8-byte BE;
bool/byte/char are 1 byte; enums are int64(ord(v)).
* Generic encodePart[T: tuple | object] recurses through fields() so
any composite Nim type is encodable without ceremony.
* Stable across Nim/C compiler upgrades: no sizeof, no memcpy, no
cast on pointers, no host-endianness dependency.
* `rawKey(bytes)` + `persistPut(..., openArray[byte])` let callers
bypass the built-in encoder with their own format (CBOR, protobuf...).
Lifecycle:
* Persistency.new is private; Persistency.instance is the only public
constructor. Same rootDir is idempotent; conflicting rootDir is
peInvalidArgument. Persistency.reset for test/restart paths.
* openJob opens-or-creates the per-job SQLite file; an existing file
is reused with its data preserved.
* Teardown integration: Persistency.instance registers a Teardown
MultiRequestBroker provider that closes all jobs and clears the
singleton slot when Waku.stop() issues Teardown.request.
Internal layering:
types.nim pure value types (Key, KeyRange, KvRow, TxOp,
PersistencyError)
keys.nim encodePart primitives + key(...) macro
payload.nim toPayload + payload(...) macro
schema.nim CREATE TABLE + connection pragmas + user_version
backend_sqlite.nim KvBackend, applyOps (single source of write SQL),
getOne/existsOne/deleteOne, scanRange (asc/desc,
half-open ranges, open-ended stop), countRange
backend_comm.nim EventBroker(mt) PersistEvent + 5 RequestBroker(mt)
declarations; encodeErr/decodeErr boundary helpers
backend_thread.nim startStorageThread / stopStorageThread (shared
allocShared0 arg, cstring dbPath, atomic
ready/shutdown flags); per-thread provider
registration
persistency.nim Persistency + Job types, singleton state, public
facade
../requests/lifecycle_requests.nim
Teardown MultiRequestBroker
Tests (69 cases, all passing):
test_keys.nim sort-order invariants (length-prefix strings,
sign-flipped ints, composite tuples, prefix
range)
test_backend.nim round-trip / replace / delete-return-value /
batched atomicity / asc-desc-half-open-open-
ended scans / category isolation / batch
txDelete
test_lifecycle.nim open-or-create rootDir / non-dir collision /
reopen across sessions / idempotent openJob /
two-tenant parallel isolation / closeJob joins
worker / dropJob removes file / acked delete
test_facade.nim put-then-get / atomic batch / scanPrefix
asc/desc / deleteAcked hit-miss /
fire-and-forget delete / two-tenant facade
isolation
test_encoding.nim tuple/named-tuple/object keys, embedded Key,
enum encoding, field-major composite sort,
payload struct encoding, end-to-end struct
round-trip through SQLite
test_string_lookup.nim peJobNotFound semantics / hasJob / subscript /
persistPut+get via id / reads short-circuit /
writes drop+warn / persistEncoded via id /
scan parity Job-ref vs id
test_singleton.nim idempotent same-rootDir / different-rootDir
rejection / no-arg instance lifecycle / reset
retargets / reset idempotence / Teardown.request
end-to-end
Prerequisite delivered in the same series: replace the in-tree broker
implementation with the external nim-brokers package; update all
broker call-sites (waku_filter_v2, waku_relay, waku_rln_relay,
delivery_service, peer_manager, requests/*, factory/*, api tests, etc.)
to the new package API; chat2 made to compile again.
Note: SDS adapter (Phase 5 of the design) is deferred -- nim-sds is
still developed side-by-side and the persistency layer is intentionally
SDS-agnostic.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
* persistency: pin nim-brokers by URL+commit (workaround for stale registry)
The bare `brokers >= 2.0.1` form cannot resolve on machines where the
local nimble SAT solver enumerates only the registry-recorded 0.1.0 for
brokers. The nim-lang/packages entry for `brokers` carries no per-tag
metadata (only the URL), so until that registry entry is refreshed the
SAT solver clamps the available-versions list to 0.1.0 and rejects the
>= 2.0.1 constraint -- even though pkgs2 and pkgcache both have v2.0.1
cloned locally.
Pinning by URL+commit bypasses the registry path entirely. Inline
comment in waku.nimble documents the situation and the path back to
the bare form once nim-lang/packages is updated.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
* persistency: nph format pass
Run `nph` on all 57 Nim files touched by this PR. Pure formatting:
17 files re-styled, no semantic change. Suite still 69/69.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
* Fix build, add local-storage-path config, lazy init of Persistency from Waku start
* fix: fix nix deps
* fixes for nix build, regenerate deps
* reverting accidental dependency changes
* Fixing deps
* Apply suggestions from code review
Co-authored-by: Ivan FB <128452529+Ivansete-status@users.noreply.github.com>
* persistency tests: migrate to suite / asyncTest / await
Match the in-tree test convention (procSuite -> suite, sync test +
waitFor -> asyncTest + await):
- procSuite "X": -> suite "X":
- For tests doing async work: test -> asyncTest, waitFor -> await.
- Poll helpers (proc waitFor(t: Job, ...) in test_lifecycle.nim,
proc waitUntilExists(...) in test_facade.nim and
test_string_lookup.nim) -> Future[bool] {.async.}, internal
`waitFor X` -> `await X`, internal `sleep(N)` ->
`await sleepAsync(chronos.milliseconds(N))`.
- Renamed test_lifecycle.nim's helper proc from `waitFor(t: Job, ...)`
-> `pollExists(t: Job, ...)`; the previous name shadowed
chronos.waitFor in the chronos macro expansion.
- `chronos.milliseconds(N)` explicitly qualified because `std/times`
also exports `milliseconds` (returning TimeInterval, not Duration).
- `check await x` -> `let okN = await x; check okN` to dodge chronos's
"yield in expr not lowered" with await-as-macro-argument.
- `(await x).foo()` -> `let awN = await x; ... awN.foo() ...` for the
same reason.
waku/persistency/persistency.nim: nph also pulled the proc signatures
across multiple lines; restored explicit `Future[void] {.async.}`
return types after the colon (an intermediate nph pass had elided them).
Suite: 71 / 71 OK against the new async write surface.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
* use idiomatic valueOr instead of ifs
* Reworked persistency shutdown, remove not necessary teardown mechanism
* Use const for DefaultStoragePath
* format to follow coding guidelines - no use of result and explicit returns - no functional change
---------
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
Co-authored-by: Ivan FB <128452529+Ivansete-status@users.noreply.github.com>
Examples
Compile
Make all examples.
make example2
Waku API
Uses the simplified Waku API to create and start a node, you need an RPC endpoint for Linea Sepolia for RLN:
./build/waku_api --ethRpcEndpoint=https://linea-sepolia.infura.io/v3/<your key>
If you can't be bothered but still want to see some action, just run the binary and it will use a non-RLN network:
./build/waku_api
## publisher/subscriber
Within examples/ you can find a publisher and a subscriber. The first one publishes messages to the default pubsub topic on a given content topic, and the second one runs forever listening to that pubsub topic and printing the content it receives.
Some notes:
- These examples are meant to work even if you are behind a firewall and you can't be discovered by discv5.
- You only need to provide a reachable bootstrap peer (see our fleets)
- The examples are meant to work out of the box.
- Note that both services wait for some time until a given minimum amount of connections are reached. This is to ensure messages are gossiped.
Run:
Wait until the subscriber is ready.
./build/subscriber
And run a publisher
./build/publisher
See how the subscriber received the messages published by the publisher. Feel free to experiment from different machines in different locations.
resource-restricted publisher/subscriber (lightpush/filter)
To illustrate publishing and receiving messages on a resource-restricted client,
examples/v2 also provides a lightpush_publisher and a filter_subscriber.
The lightpush_publisher continually publishes messages via a lightpush service node
to the default pubsub topic on a given content topic.
The filter_subscriber subscribes via a filter service node
to the same pubsub and content topic.
It runs forever, maintaining this subscription
and printing the content it receives.
Run Start the filter subscriber.
./build/filter_subscriber
And run a lightpush publisher
./build/lightpush_publisher
See how the filter subscriber receives messages published by the lightpush publisher.
Neither the publisher nor the subscriber participates in relay,
but instead make use of service nodes to save resources.
Feel free to experiment from different machines in different locations.