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chore(deps): patch cowprotocol to bleu/cow-rs main (post-alpha.3)#14

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brunota20 wants to merge 11 commits into
nullislabs:mainfrom
bleu:feat/cowprotocol-bleu-main-v2
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chore(deps): patch cowprotocol to bleu/cow-rs main (post-alpha.3)#14
brunota20 wants to merge 11 commits into
nullislabs:mainfrom
bleu:feat/cowprotocol-bleu-main-v2

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@brunota20

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Replaces #10. Rebased on top of the latest #9, which already inherits #8's lgahdl-requested fixes (keccak256 namespacing, Default impl, range-based list_keys). The three review comments on the original #10 are resolved automatically.

Draft, stacked on top of #8 + #9 - the diff includes those PRs' commits until they land.

cowprotocol v1.0.0-alpha.3 was cut from cowdao-grants/cow-rs PR #5 at commit 1742ffa. bleu/cow-rs main has 18 commits since, several of which are directly relevant to the cow-api backend in #8:

Commit Why it matters here
fix(composable): correct Proof width and add signature assemblers Affects the TWAP poll path the host will eventually drive through cow_twap_* host calls.
refactor(trading): fail fast on a zero from-address Closes the MEDIUM "wrong-target submission" review finding mfw78 left on PR #5.
feat(order_book): enforce QuoteRequest invariants, collapse boilerplate Hardens QuoteRequest.
feat(domain,order): add EIP-712 typed-data and message-hash helpers TWAP / EthFlow encoding.
feat(order-book): migrate trades to /api/v2 with pagination The trades endpoint shape changed in upstream.
fix(cowprotocol): gate DEFAULT_HTTP_TIMEOUT import to non-wasm Companion wasm fix.
refactor(composable): extract deployed() helper, split TWAP submodule The composable submodule layout moved.

How

Workspace-level [patch.crates-io] pinned to a specific bleu/cow-rs commit for determinism:

[patch.crates-io]
cowprotocol = { git = "https://github.com/bleu/cow-rs", rev = "c012404ffefc411bff543d2290e19ba7fbef2516" }

When the next alpha is published the patch line goes away in one commit.

Verified

  • cargo fmt --all --check clean.
  • RUSTFLAGS=-D warnings cargo clippy --all-targets clean.
  • cargo test -p nexum-engine - 41 passed.

brunota20 added 11 commits June 1, 2026 14:19
Adds the dependencies the 0.2 host backends need:

- cowprotocol (1.0.0-alpha) for the cow-api submission path
  (OrderBookApi, OrderCreation, OrderUid, Chain).
- alloy-provider / -rpc-client / -transport-ws / -primitives (1.5)
  for the chain JSON-RPC dispatch. The reqwest feature on
  alloy-provider engages connect_http; the pubsub/ws features back
  eth_subscribe-class methods.
- redb (2) for local-store. Same crate cowprotocol's own watch-tower
  picked, so the dep tree does not bifurcate when both are used in
  the same workspace.
- reqwest (0.12, rustls-tls) — direct, so the import survives any
  future cowprotocol feature rearrangement.
- tracing + tracing-subscriber (env-filter + fmt) — replaces the 0.1
  eprintln! debug log so the engine can drop into a structured log
  pipeline without re-instrumenting every host call.
- thiserror (2) — typed error enums in each backend.
- tempfile + wiremock as dev-deps for the host backend tests.

Adds engine.example.toml documenting the [engine] state_dir + per-
chain RPC URLs the chain backend reads at boot; data/ is now
ignored so a local run does not leave the redb file in tree.
Replaces the 0.2 Unsupported stubs with working backends. Each
capability lives in its own host submodule so the trait impls in
main.rs stay thin (dispatch + project the backend's typed error
onto HostError).

cow_api::submit_order
  - Parses the guest's bytes as JSON cowprotocol::OrderCreation.
  - Dispatches via cowprotocol::OrderBookApi::post_order.
  - Returns the assigned OrderUid as a 0x-prefixed hex string.

cow_api::request
  - REST passthrough. The base URL is whichever URL the pool's
    OrderBookApi client carries — so OrderBookApi::new_with_base_url
    overrides (staging, wiremock) flow through transparently.
  - Method/path validated host-side; orderbook 4xx/5xx bodies are
    surfaced verbatim so the guest can decode {errorType,description}.

chain::request
  - Raw JSON-RPC dispatch over an alloy DynProvider opened from
    engine.toml at boot. WebSocket URLs engage pubsub (eth_subscribe);
    HTTP URLs use the HTTP transport. Params are passed as
    serde_json::RawValue so alloy does not re-encode.
  - request-batch falls back to per-call dispatch (same shape as the
    earlier stub but now backed by real RPC).

local_store
  - redb file under engine_config.engine.state_dir.
  - Single shared table. Per-module namespacing is enforced
    host-side via [len:u8][module_name][raw_key] prefix on every
    key. list_keys strips the prefix before returning to the guest.

logging
  - Routes through tracing::event! tagged with module=<namespace>.
  - Engine boot installs an EnvFilter-based subscriber; RUST_LOG
    overrides the engine.toml log_level.

identity / remote-store / messaging / http stay at Unsupported per
the 0.2 roadmap (keystore / Swarm / Waku land in 0.3).

Tests (14, all green):
  - cow_orderbook: pool default chains, unknown-chain typing, REST
    GET passthrough, relative-path resolution, unknown-method
    rejection, submit_order round-trip — last three under wiremock
    so the full HTTP path is exercised without hitting api.cow.fi.
  - provider_pool: empty pool surfaces UnknownChain.
  - local_store: roundtrip, namespace isolation, delete, list_keys
    prefix-stripping, empty-namespace rejection.

End-to-end against modules/example: example.wasm loads under the
new wiring, logs init + on_event through the tracing pipeline.
…ed_crate_dependencies, drop redundant map_err)
…abs#8 fixes)

PR nullislabs#9 specific:
- main: warn + return when block/log streams end (WebSocket dropped)
- supervisor: simplify dispatch_block by extracting chain_id before move
- supervisor: temp_local_store returns (TempDir, LocalStore) instead of leaking
- README: correct engine.toml chain syntax to [chains.<id>] with rpc_url

Rebased from PR nullislabs#8:
- local_store_redb: table.range() instead of iter() for O(matching) keys
- provider_pool: dedupe method clone on the success path
- main: hex_encode writes into the pre-allocated buffer
- cow_orderbook: drop blank line nit
- manifest: collapse nested if and use ? operator (clippy)
- alloy_rpc_client / alloy_transport(_ws) imports as _ to satisfy
  unused_crate_dependencies.
@brunota20

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Superseded by a follow-up - that PR rebases this branch on top of the latest #9 (which now contains the manifest/host/main refactors). The single chore(deps) commit was cherry-picked unchanged onto the refactored base.

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