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feat(da): sign blob submissions and broadcast over consensus gRPC - #3483
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Add a BlobSubmitter seam to the DA client so blob submission can be routed somewhere other than celestia-node's JSON-RPC blob.Submit, e.g. to sign PayForBlobs locally. Reads keep using the JSON-RPC client. - da.Config.Submitter; nil keeps the existing blob.Submit path. - block.WithSubmitter and a variadic NewDAClient(..., opts ...DAClientOption), so existing callers compile unchanged. - pkg/cmd.StartNode accepts DA client options for apps that cannot be imported by the root module. The error-to-status mapping applies to both paths.
Configuration for signing PayForBlobs locally and broadcasting them over consensus gRPC (grpc_address, grpc_auth_token, grpc_tls, network, keyring dir/backend/key, worker_accounts, passphrase_file). Config only; it adds no dependencies to the root module and is disabled by default. When enabled, validation requires grpc_address, network and key_name, restricts keyring_backend to file or test, and rejects da.signing_addresses (which would inject a signer_address the local signer does not use). grpc_auth_token falls back to da.auth_token since one da-proxy token covers both endpoints.
…r_accounts The chain-id comes from the consensus gRPC endpoint, so network is not needed. Parallel worker accounts write new keys into the operator keyring and move funds at startup, and ev-node submits sequentially anyway.
celestia-app v10 reports oversized blobs as "too large" and a dropped transaction as "eviction poll timeout". Neither matched the sentinels the status switch looked for, so both ended up as StatusError.
…client Adds a block.BlobSubmitter that signs PayForBlobs from a local keyring and broadcasts them over consensus gRPC with x-token auth, for DA endpoints that cannot sign such as da-proxy. Built on celestia-app pkg/user only; no celestia-node dependency. The replace to ../.. is temporary until root is tagged.
The submitter is built only for aggregator and promotable nodes.
Runs celestia-app v10.4.0 and celestia-node v0.34.3, funds a test keyring key, starts testapp with tx_signer and asserts blobs are included and the signer paid fees.
celestia-app rejects txs over its max size with "transaction size exceeds maximum allowed limit", which matched no sentinel, so batch halving never engaged.
…startup SetupTxClient starts a queue worker that runs until its context is cancelled, so Close now cancels it. ConfigFromNode rejects signer_address in da.submit_options, reads the passphrase only for the file backend, and resolves an empty keyring_dir to the node home.
A failed query returned zero, so the fee assertion passed vacuously.
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| Check name | Status | Explanation | Resolution |
|---|---|---|---|
| Docstring Coverage |  |
Docstring coverage is 42.31% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 26 functions across 16 files. (1 skipped:… | Write docstrings for the functions missing them to satisfy the coverage threshold. |
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Check name Status Explanation Title check The title clearly and concisely describes the main change: signing blob submissions and broadcasting them over consensus gRPC. Description check The description includes the required Overview section and provides clear context, implementation details, behavior, limitations, and testing information. Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request.
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Docstring coverage is 42.31% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 26 functions across 16 files. (1 skipped: 1 unsupported.)
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Write docstrings for the functions missing them to satisfy the coverage threshold.
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Additional details and impacted files@@ Coverage Diff @@
## main #3483 +/- ##
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- Coverage 69.53% 69.31% -0.22%
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Files 121 122 +1
Lines 12037 12216 +179
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+ Hits 8370 8468 +98
- Misses 3667 3748 +81
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damiannolan
marked this pull request as ready for review
October 15, 2026 12:50
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Actionable comments posted: 3
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Inline comments:
Review comments at @apps/evm/cmd/run.go:
- Line 64: Update the signer condition in the `nodeConfig.DA.TxSigner.Enabled`
check to include nodes running the force-inclusion server, so the DA client used
for force-inclusion submissions has a signer; alternatively, reject this
configuration during startup.
Review comments at @da/celestia/submitter.go:
- Line 135: Add bounded deadlines to the startup gRPC queries in New and to the
queries inside SetupTxClient so unresponsive endpoints cannot stall setup
indefinitely. Keep each short-lived setup deadline separate from the transaction
worker’s lifetime context.
- Line 276: Update the branch around DefaultEstimateGas so max_gas_price alone
does not set a fixed gas limit when Gas is unset; preserve the transaction
client’s dynamic gas estimation while still applying the price cap through
SetGasLimitAndGasPrice. Ensure the resulting gas limit is valid for simulated
transactions on each supported network.
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⛔ Files ignored due to path filters: 4
apps/evm/go.sumis excluded by!**/*.sumapps/testapp/go.sumis excluded by!**/*.sumda/celestia/go.sumis excluded by!**/*.sumtest/docker-e2e/go.sumis excluded by!**/*.sum
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CHANGELOG.mdapps/evm/cmd/run.goapps/evm/go.modapps/testapp/Dockerfileapps/testapp/cmd/run.goapps/testapp/go.modblock/internal/da/client.goblock/internal/da/client_test.goblock/public.goblock/public_test.goda/celestia/doc.goda/celestia/go.modda/celestia/submitter.goda/celestia/submitter_test.godocs/adr/adr-008-mempool-optimint-light-client.mddocs/guides/da-layers/celestia.mddocs/guides/da/celestia-da.mddocs/learn/config.mdgo.work.examplemlc_config.jsonpkg/cmd/run_node.gopkg/config/config.gopkg/config/config_test.gopkg/config/defaults.gotest/docker-e2e/docker_test.gotest/docker-e2e/go.modtest/docker-e2e/signed_submit_test.go
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Run the evm binary on ev-reth with da.tx_signer and a passphrase-protected file keyring, send transactions, and check the blocks carrying them reach DA paid by ev-node's key. Shared DA setup moves into helpers used by the testapp test too. The test is evm-tagged, so it gets its own just recipe and CI job like the other evm docker tests.
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The force inclusion server submits to DA from any node role, but the signer was only attached on aggregator and promotable nodes. A full node with da.tx_signer enabled and the server running fell back to node-side blob.Submit, which fails behind endpoints that cannot sign.
The account and balance queries in New ran on the node's command context with no deadline, so an endpoint that accepted connections but never answered hung startup. Give each a 30s timeout. SetupTxClient keeps the long-lived context because it also scopes the tx queue worker.
chatton
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Oct 20, 2026
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LGTM I think the forced inclusion issue is already addressed and that's the only one I would fix beforehand.
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Overview
Lets ev-node submit blobs through DA endpoints that cannot sign, such as da-proxy. With
da.tx_signer.enabled, the node signs eachPayForBlobswith a key from a local cosmos keyring and broadcasts it over Celestia consensus gRPC. Reads still go through celestia-node JSON-RPC atda.address. Off by default.block.WithSubmitterinjects aBlobSubmitterinto the DA client. Existing callers are unaffected and the root module gains no dependencies.da/celestiaimplements it on celestia-app'spkg/userTxClient, with no celestia-node dependency. It is a separate module because celestia-app's replace directives do not propagate. Onlytestappandevmimport it, for aggregator and promotable nodes.da.submit_optionssetssigner_address.The DA client's status mapping now also matches the errors celestia-app v10 returns ("too large", "size exceeds maximum allowed limit", "eviction poll timeout"). Previously these mapped to
StatusError, so batch halving and not-included retries never kicked in. This also affects the default JSON-RPC path.Testing
Unit tests, plus docker e2e
TestDockerSuite/TestSignedBlobSubmissionagainst celestia-app v10.4.0 and celestia-node v0.34.3, which checks that blobs are included and paid for by ev-node's key. Not covered: a TLS gRPC endpoint.da/celestiaand the apps usereplace github.com/evstack/ev-node => ../..until root is tagged.Summary by CodeRabbit