fix(provider): adaptive HTTP polling for local/Anvil endpoints#114
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Drop the HTTP fallback poll interval from 1s to 100ms when ETH_RPC_URL points at 127.0.0.1 / localhost / host.docker.internal / [::1]. Mainnet RPC stays at 1s. Override via AETHER_HTTP_POLL_MS for tests. On the historical replay e2e script this closes the last catch-rate gap vs the aether-replay oracle: block 24643151 now captures the post-CoW AAVE arb at +17,920 ETH gross (bundle arb-24643154-1-5-1), detection throughput rises from 988 to 4,600 cycles and shadow bundles from 68 to 1,459 in the same ~10s replay window. 3 unit tests cover the heuristic, env-var override, and remote URL default. No behaviour change for mainnet HTTP fallback.
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Summary
ETH_RPC_URLpoints at127.0.0.1/localhost/host.docker.internal/[::1]. Mainnet HTTP fallback stays at 1 s.AETHER_HTTP_POLL_MSenv var for explicit override (tests, tuning).aether-replayoracle: at 1 s cadence the detector batches an entire Anvil-replayed block into a single scrape and misses short-lived intra-block arbs.Why
Anvil replays a full historical block in hundreds of ms. The pre-existing 1 s
connect_httpcadence collapsed all intra-block state transitions into one batched scrape, so on block24643151the pipeline caught the post-CoW AAVE arb at +11.87 ETH instead of the tx-1 peak +17,044 ETH thataether-replaycaptures. Real mainnet RPC (12 s/block) is unaffected — the heuristic only kicks in for local hosts.Files Changed
crates/grpc-server/src/provider.rsresolve_http_poll_interval()+is_local_rpc()helpers;connect_http()calls them; 3 new unit testsAcceptance criteria
127.0.0.1,localhost,host.docker.internal,[::1]) poll at 100 msAETHER_HTTP_POLL_MSenv var overrides both heuristic and default; unparseable values fall through to defaultconnect_httppolling loop unchanged structurallyTest plan
cargo build --release -p aether-grpc-servercargo clippy -p aether-grpc-server --all-targets --release -- -D warningscargo test -p aether-grpc-server --release— 23 provider unit tests + 3 ws-subscription integration tests passis_local_rpcmatrix, default routing, env-var override, unparseable env-var fallback./scripts/historical_replay_e2e.sh --block 24643151and confirm tx-1 AAVE arb captured at full +17 k ETH gross (parity withaether-replay --block 24643151 --sim-on-chain)Refs #107 (Fix 6).