feat: add native indexer mode by skylar-simoncelli · Pull Request #2051 · midnightntwrk/midnight-node

skylar-simoncelli · 2026-08-19T15:44:46Z

Summary

add an optional --indexer node mode that starts and supervises the native indexer worker
port the complete indexer source tree directly into midnight-node, with no submodule and no separately released or deployed indexer component
ship the worker in the same midnight-node image and preserve the existing GraphQL API, SQL schema, configuration, metrics, and indexer behavior
keep the worker on its proven independent Cargo dependency graph so the node consensus dependency graph remains unchanged
keep indexer failure non-fatal to the node and restart the worker after unexpected exits
make --indexer imply archive retention for both historical state and block bodies
fix the in-memory pub-sub panicking on the first indexed c2m-bridge event (bug also present upstream)
speed up chain indexing 4.4x (8.3 -> 36.8 blocks/s measured on devnet): prefetch blocks concurrently with indexing, fetch several catch-up blocks at once (fetch_concurrency), fetch system parameters with the block instead of per-block on the sequential path, and make gc cadence configurable (gc_block_interval)
add per-phase Prometheus histograms to the chain indexer so replay cost is attributable in production

Architecture

The externally visible primitive is midnight-node --indexer: one node image, one deployment, and one node-managed lifecycle. Internally, the node supervises a sibling midnight-indexer worker built from the source now owned by this repository.

The worker is compiled separately with indexer/Cargo.toml and its checked-in lockfile. This is intentional: the original Ledger 8 indexer depends on older Base Crypto, Serialize, Storage, and transient-crypto revisions. Linking those crates into the Ledger 9 node process allows root Cargo patches to rewrite the historical verifier graph. The process boundary preserves the exact dependency closure used by the current standalone indexer without changing node consensus dependencies.

This is source and release consolidation, not an external runtime dependency. The standalone midnight-indexer repository and deployment can be retired once parity, replay, and performance validation are complete.

The indexer performs historical runtime-state queries in addition to reading block bodies. --indexer therefore forces both state and block archive modes. An existing database created with pruned state must be rebuilt because pruned historical trie state cannot be recovered in place.

Performance

Measured on devnet (683k blocks) against a fully synced colocated archive node, 4/8 CPU 10/14 GiB pod, one variable changed per deployment:

Configuration	Chain indexing rate	Full devnet replay
Ported indexer, unmodified	8.3 blocks/s	~23 h
+ concurrent fetch/process pipelining	9.8 blocks/s	~19 h
+ `fetch_concurrency` 8	12.2 blocks/s	~16 h
+ system parameters fetched with the block	36.8 blocks/s	~5.2 h
+ `gc_block_interval` 16	71.9 blocks/s	~2.6 h
+ `fetch_concurrency` 32	111.2 blocks/s	1 h 42 m measured end to end

A fresh from-genesis replay of the full devnet chain (685,016 blocks) on the final build completed in 1 h 42 m with zero worker exits, indexing the chain's c2m-bridge event and re-detecting the D-parameter change at exactly the same block as the dedicated indexer. Remaining per-block cost at 111 blocks/s is dominated by the ledger SQLite FULL-fsync persist (5.7 ms). Steady-state GraphQL block queries measure p50 1.50 ms / p99 2.09 ms against the embedded service versus p50 3.45 ms / p99 4.70 ms against the dedicated internal service from the same in-cluster client. ledger-db.sqlite reaches ~32 GB for devnet; disk sizing must budget for it. The SPO indexer's historical epoch catch-up is separately ~148x faster after rewriting a Cardano db-sync query whose generic plan scanned 1.6M rows to return one.

Validation

Devnet validation completed so far:

node runs at devnet chain head with the ported indexer replaying the full history; zero worker or container restarts across sustained multi-hour segments after the archive-pruning and bridge-event fixes
byte-exact GraphQL parity with the deployed dedicated devnet indexer at multiple heights for blocks (including author), and for the systemParameters projection including the D-parameter change history
systemParameters_getAriadneParameters responses match validator-01 byte-for-byte at multiple epochs
per-phase histograms (indexer_*_duration_seconds) expose fetch/convert/ledger/persist/system-parameters/storage/publish timings

Remaining validation

fresh full replay from genesis on the final image: 685,016 blocks in 1 h 42 m, zero worker exits, byte-exact parity spot checks across six heights, transactions, authors, and system-parameters history
steady-state GraphQL latency comparison against the dedicated deployment
loaded/concurrent GraphQL benchmark and subscription behavior under load
Wallet SDK correctness, initial-sync, and client-side performance comparison
resolve DCO for the pre-existing unsigned branch commit

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

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chatgpt-codex-connector · 2026-08-19T18:38:02Z

+		telemetry_config: telemetry::Config { tracing_config, metrics_config },
+	} = Config::load().context("load indexer configuration")?;
+
+	log::info!(application_config:?, infra_config:?; "starting embedded indexer");


Redact the Blockfrost credential from startup logs

Whenever --indexer is enabled, this info-level log formats the entire InfraConfig; its derived Debug output includes SpoNodeConfig.blockfrost_id, which is stored as a plain String until it is converted to SecretString later. This exposes the Blockfrost API credential to routine production logs, so log only non-sensitive fields or redact the credential before formatting the configuration.

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chatgpt-codex-connector · 2026-08-19T18:38:02Z

@@ -0,0 +1,10 @@
+#indexer #api


Move the change file into the node component

This node feature's change file is outside changes/node/added/, even though the release workflow packages and filters component notes under changes/node (.github/workflows/release-image.yml lines 473-476) and the archive workflow likewise processes only that directory. Consequently this feature will be omitted from the node release changelog; move the file into the node component directory.

AGENTS.md reference: AGENTS.md:L195-L201

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chatgpt-codex-connector · 2026-08-19T18:38:02Z

+				async move {
+					if let Err(error) = crate::indexer::run() {


Make the embedded runner cancellable during node shutdown

When shutdown is initiated by SIGINT or by another essential node task failing, rather than by SIGTERM, this synchronous run() call remains inside a single poll of the TaskManager's blocking future and cannot observe the TaskManager exit signal; the nested indexer runtime itself only installs SIGTERM handlers. The Substrate runner therefore waits its full 60-second runtime shutdown timeout before leaking the blocked task, making Ctrl-C and internal-failure shutdowns stall; propagate node cancellation into the nested runtime or otherwise ensure this call can return for every node shutdown path.

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Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

github-advanced-security

Opengrep OSS found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.

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+ARG RUST_VERSION
+FROM lukemathwalker/cargo-chef:0.1.77-rust-$RUST_VERSION-trixie AS chef
+WORKDIR /build
+
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS builder
+SHELL ["/bin/bash", "-c"]
+ARG PROFILE=release
+COPY --from=planner /build/recipe.json recipe.json
+RUN cargo chef cook --profile $PROFILE --recipe-path recipe.json
+COPY . .
+RUN cargo build -p chain-indexer --locked --features cloud --profile $PROFILE && \
+    mkdir -p /runtime/usr/local/bin && \
+    mv "./target/${PROFILE/dev/debug}/chain-indexer" /runtime/usr/local/bin && \
+    mv /build/chain-indexer/bin/entrypoint.sh /runtime/usr/local/bin && \
+    mkdir -p /runtime/opt/chain-indexer && \
+    mv /build/chain-indexer/config.yaml /runtime/opt/chain-indexer
+
+FROM debian:trixie-slim@sha256:f6e2cfac5cf956ea044b4bd75e6397b4372ad88fe00908045e9a0d21712ae3ba AS runtime
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends ca-certificates=20250419 && \
+    rm -rf /var/lib/apt/lists/*
+RUN useradd -u 10001 -d /nonexistent -s /usr/sbin/nologin -M -c "" appuser && \
+    passwd -l appuser && \
+    mkdir /var/run/chain-indexer && \
+    chown appuser:appuser /var/run/chain-indexer
+COPY --from=builder --chown=appuser:appuser /runtime /
+USER appuser
+WORKDIR /opt/chain-indexer
+ENTRYPOINT ["entrypoint.sh"]


+ARG RUST_VERSION
+FROM lukemathwalker/cargo-chef:0.1.77-rust-$RUST_VERSION-trixie AS chef
+WORKDIR /build
+
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS builder
+SHELL ["/bin/bash", "-c"]
+ARG PROFILE=release
+COPY --from=planner /build/recipe.json recipe.json
+RUN cargo chef cook --profile $PROFILE --recipe-path recipe.json
+COPY . .
+RUN cargo build -p indexer-api --locked --features cloud --profile $PROFILE && \
+    mkdir -p /runtime/usr/local/bin && \
+    mv "./target/${PROFILE/dev/debug}/indexer-api" /runtime/usr/local/bin && \
+    mv /build/indexer-api/bin/entrypoint.sh /runtime/usr/local/bin && \
+    mkdir -p /runtime/opt/indexer-api && \
+    mv /build/indexer-api/config.yaml /runtime/opt/indexer-api
+
+FROM debian:trixie-slim@sha256:f6e2cfac5cf956ea044b4bd75e6397b4372ad88fe00908045e9a0d21712ae3ba AS runtime
+RUN useradd -u 10001 -d /nonexistent -s /usr/sbin/nologin -M -c "" appuser && \
+    passwd -l appuser && \
+    mkdir /var/run/indexer-api && \
+    chown appuser:appuser /var/run/indexer-api
+COPY --from=builder --chown=appuser:appuser /runtime /
+USER appuser
+WORKDIR /opt/indexer-api
+ENTRYPOINT ["entrypoint.sh"]
+EXPOSE 8088


+ARG RUST_VERSION
+FROM lukemathwalker/cargo-chef:0.1.77-rust-$RUST_VERSION-trixie AS chef
+WORKDIR /build
+
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS builder
+SHELL ["/bin/bash", "-c"]
+ARG PROFILE=release
+COPY --from=planner /build/recipe.json recipe.json
+RUN cargo chef cook --profile $PROFILE --recipe-path recipe.json
+COPY . .
+RUN cargo build -p indexer-standalone --locked --features standalone --profile $PROFILE && \
+    mkdir -p /runtime/usr/local/bin && \
+    mv "./target/${PROFILE/dev/debug}/indexer-standalone" /runtime/usr/local/bin && \
+    mv /build/indexer-standalone/bin/entrypoint.sh /runtime/usr/local/bin && \
+    mkdir -p /runtime/opt/indexer-standalone && \
+    mv /build/indexer-standalone/config.yaml /runtime/opt/indexer-standalone
+
+FROM debian:trixie-slim@sha256:f6e2cfac5cf956ea044b4bd75e6397b4372ad88fe00908045e9a0d21712ae3ba AS runtime
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends ca-certificates=20250419 && \
+    rm -rf /var/lib/apt/lists/*
+RUN useradd -u 10001 -d /nonexistent -s /usr/sbin/nologin -M -c "" appuser && \
+    passwd -l appuser && \
+    mkdir /var/run/indexer-standalone && \
+    chown appuser:appuser /var/run/indexer-standalone && \
+    mkdir /data && \
+    chown appuser:appuser /data
+COPY --from=builder --chown=appuser:appuser /runtime /
+USER appuser
+WORKDIR /opt/indexer-standalone
+ENTRYPOINT ["entrypoint.sh"]
+EXPOSE 8088


+ARG RUST_VERSION
+FROM lukemathwalker/cargo-chef:0.1.77-rust-$RUST_VERSION-trixie AS chef
+WORKDIR /build
+
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS builder
+SHELL ["/bin/bash", "-c"]
+ARG PROFILE=release
+COPY --from=planner /build/recipe.json recipe.json
+RUN cargo chef cook --profile $PROFILE --recipe-path recipe.json
+COPY . .
+RUN cargo build -p indexer-tests --locked --profile $PROFILE && \
+    mkdir -p /runtime/usr/local/bin && \
+    mv "./target/${PROFILE/dev/debug}/indexer-tests" /runtime/usr/local/bin
+
+FROM debian:trixie-slim@sha256:66b37a5078a77098bfc80175fb5eb881a3196809242fd295b25502854e12cbec AS runtime
+RUN useradd -u 10001 -d /nonexistent -s /usr/sbin/nologin -M -c "" appuser && \
+    passwd -l appuser && \
+    mkdir /var/run/indexer-tests && \
+    chown appuser:appuser /var/run/indexer-tests
+COPY --from=builder --chown=appuser:appuser /runtime /
+USER appuser
+WORKDIR /opt/indexer-tests
+ENTRYPOINT ["indexer-tests"]


+ARG RUST_VERSION
+FROM lukemathwalker/cargo-chef:0.1.77-rust-$RUST_VERSION-trixie AS chef
+WORKDIR /build
+
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS builder
+SHELL ["/bin/bash", "-c"]
+ARG PROFILE=release
+COPY --from=planner /build/recipe.json recipe.json
+RUN cargo chef cook --profile $PROFILE --recipe-path recipe.json
+COPY . .
+RUN cargo build -p spo-indexer --locked --features cloud --profile $PROFILE && \
+    mkdir -p /runtime/usr/local/bin && \
+    mv "./target/${PROFILE/dev/debug}/spo-indexer" /runtime/usr/local/bin && \
+    mv /build/spo-indexer/bin/entrypoint.sh /runtime/usr/local/bin && \
+    mkdir -p /runtime/opt/spo-indexer && \
+    mv /build/spo-indexer/config.yaml /runtime/opt/spo-indexer
+
+FROM debian:trixie-slim@sha256:f6e2cfac5cf956ea044b4bd75e6397b4372ad88fe00908045e9a0d21712ae3ba AS runtime
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends ca-certificates=20250419 && \
+    rm -rf /var/lib/apt/lists/*
+RUN useradd -u 10001 -d /nonexistent -s /usr/sbin/nologin -M -c "" appuser && \
+    passwd -l appuser && \
+    mkdir /var/run/spo-indexer && \
+    chown appuser:appuser /var/run/spo-indexer
+COPY --from=builder --chown=appuser:appuser /runtime /
+USER appuser
+WORKDIR /opt/spo-indexer
+ENTRYPOINT ["entrypoint.sh"]


+ARG RUST_VERSION
+FROM lukemathwalker/cargo-chef:0.1.77-rust-$RUST_VERSION-trixie AS chef
+WORKDIR /build
+
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS builder
+SHELL ["/bin/bash", "-c"]
+ARG PROFILE=release
+COPY --from=planner /build/recipe.json recipe.json
+RUN cargo chef cook --profile $PROFILE --recipe-path recipe.json
+COPY . .
+RUN cargo build -p wallet-indexer --locked --features cloud --profile $PROFILE && \
+    mkdir -p /runtime/usr/local/bin && \
+    mv "./target/${PROFILE/dev/debug}/wallet-indexer" /runtime/usr/local/bin && \
+    mv /build/wallet-indexer/bin/entrypoint.sh /runtime/usr/local/bin && \
+    mkdir -p /runtime/opt/wallet-indexer && \
+    mv /build/wallet-indexer/config.yaml /runtime/opt/wallet-indexer
+
+FROM debian:trixie-slim@sha256:f6e2cfac5cf956ea044b4bd75e6397b4372ad88fe00908045e9a0d21712ae3ba AS runtime
+RUN useradd -u 10001 -d /nonexistent -s /usr/sbin/nologin -M -c "" appuser && \
+    passwd -l appuser && \
+    mkdir /var/run/wallet-indexer && \
+    chown appuser:appuser /var/run/wallet-indexer
+COPY --from=builder --chown=appuser:appuser /runtime /
+USER appuser
+WORKDIR /opt/wallet-indexer
+ENTRYPOINT ["entrypoint.sh"]


Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

github-advanced-security

gitleaks found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.

github-advanced-security

Checkov found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

The ported schema-v4.graphql lost its tab-indented blank lines and trailing newline, so the byte-exact schema check in the indexer test recipe failed. Restore the file to the generator's exact output. Assisted-by: Claude <noreply@anthropic.com> Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

The in-memory pub-sub had no channel for BridgeEventIndexed, so the standalone and native flavors panicked the chain-indexer task on the first indexed c2m-bridge event. The block was already saved, so the worker resumed past it on restart, but every bridge event cost a worker restart and subscription clients silently missed the event. Add the missing broadcast channel with publisher/subscriber arms and a drain task, plus a publish/subscribe regression test. Assisted-by: Claude <noreply@anthropic.com> Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

Phase timing on devnet attributed roughly half of the 125 ms per-block cycle to awaiting the next block from the node stream. The existing `.map(ready).buffered(blocks_buffer)` adapter cannot fetch ahead: stream combinators only run while the consumer polls them, so fetching and indexing were strictly serial. Run the block stream on its own task feeding a bounded channel sized by `blocks_buffer`, so block fetching overlaps block processing while preserving ordering and the existing gap/duplicate handling. Assisted-by: Claude <noreply@anthropic.com> Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

Fetching one block takes about 11 sequential RPC awaits. During by-height catch-up these are independent across heights except for the authority cache, which is only needed to resolve block authors and is invalidated by NewSession events. Split make_block into make_raw_block, which fetches and assembles everything except the author and can run for several heights at once, and finish_block, which resolves the author against the sequential authority cache in block order. The catch-up path now drives make_raw_block through a bounded buffered stream (new node config fetch_concurrency, default 8) while author resolution and parent-hash verification stay sequential, so results are byte-identical to the serial implementation. Assisted-by: Claude:claude-fable-5 Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

Phase timing on devnet showed determine_system_parameters_change spending 48 ms per block: a redundant at-block client construction plus two runtime-API calls on the sequential indexing path, every block. Fetch the D-parameter and terms and conditions in make_raw_block instead, where the at-block client already exists and the lookups ride the concurrent block prefetch, and carry the values on the node block. Change detection compares the same values fetched at the same block state, so detected changes and their recorded blocks are identical. The Node trait loses fetch_system_parameters, which had no other callers. Assisted-by: Claude:claude-fable-5 Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

The system-parameters change removed the node parameter from index_block, but the genesis branch still fetches the genesis ledger state from the node. Restore the parameter. Assisted-by: Claude:claude-fable-5 Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

The per-block gc pass consistently consumes its full time budget while culling almost nothing during catch-up (2.6 nodes per 12 ms pass measured on devnet), costing about 11% of replay wall time. Add gc_block_interval (default 1, i.e. unchanged behavior) so deployments can amortize the pass over several blocks with the same per-pass budget. Assisted-by: Claude:claude-fable-5 Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

feat: embed indexer in dedicated node mode

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Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

skylar-simoncelli added skip-changes-check-jira bot:ai-assisted Authored or substantially edited by an AI agent labels Aug 19, 2026

docs: add embedded indexer change file

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skylar-simoncelli added 3 commits August 19, 2026 10:34

refactor: move embedded indexer ownership into node

aa4fd9e

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

ci: include indexer sources in node builds

f65759c

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

fix: keep node version aligned with runtime

918c258

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

skylar-simoncelli marked this pull request as ready for review August 19, 2026 18:35

skylar-simoncelli requested a review from a team as a code owner August 19, 2026 18:35

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fix: package embedded indexer configuration

c1d2f81

skylar-simoncelli marked this pull request as draft August 19, 2026 21:26

skylar-simoncelli added 7 commits August 19, 2026 16:39

fix: isolate embedded indexer runtime

1708ab5

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

fix: wait for node before starting embedded SPO indexer

86aa3b6

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

fix: supervise embedded indexer failures

51ec7e8

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

fix: initialize embedded indexer metrics once

2379af5

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

docs: describe embedded indexer supervision

16666aa

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

fix: preserve indexer metrics across retries

33829ee

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

refactor: port indexer source into node

a005226

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

skylar-simoncelli changed the title ~~feat: embed indexer in dedicated node mode~~ feat: add native indexer mode Aug 20, 2026

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skylar-simoncelli added 2 commits August 20, 2026 08:48

fix: isolate historical indexer verifier

debf518

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

chore: integrate ported indexer checks

25526c3

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

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skylar-simoncelli added 3 commits August 20, 2026 09:53

fix: isolate native indexer worker

b0d760a

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

refactor: use released indexer verifier crates

7fea280

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

chore: annotate indexer scan fixtures

56ed522

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

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chore: scope indexer fixture scans

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Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

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skylar-simoncelli added 3 commits August 20, 2026 10:36

chore: scope indexer QA scans

786f0f0

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

fix: retain archive state for native indexer

362fb4c

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

fix: avoid generic-plan Cardano history scan

f71324a

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

skylar-simoncelli force-pushed the skylar-embedded-indexer branch 2 times, most recently from 2f204ed to f71324a Compare August 20, 2026 18:26

skylar-simoncelli added 8 commits August 20, 2026 12:44

feat(indexer): expose block phase timings

9d719e2

Signed-off-by: Skylar Simoncelli <skylar@skylar.email>

skylar-simoncelli mentioned this pull request Aug 21, 2026

perf: 13x faster chain indexing, bridge-event fix for standalone midnightntwrk/midnight-indexer#1453

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skylar-simoncelli commented Aug 19, 2026 •

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