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refactor(ethflow-watcher): observe + verify instead of submit (BLEU-855 redesign, COW-1076) #63

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refactor(ethflow-watcher): observe + verify instead of submit (BLEU-855 redesign, COW-1076) #63

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2 changes: 0 additions & 2 deletions modules/ethflow-watcher/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -13,8 +13,6 @@ shepherd-sdk = { path = "../../crates/shepherd-sdk" }
cowprotocol = { version = "1.0.0-alpha.3", default-features = false }
alloy-primitives = { version = "1.5", default-features = false, features = ["std"] }
alloy-sol-types = { version = "1.5", default-features = false, features = ["std"] }
serde_json = { version = "1", default-features = false, features = ["alloc"] }
thiserror = "2"
wit-bindgen = { version = "0.57", default-features = false, features = ["macros", "realloc"] }

[dev-dependencies]
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11 changes: 7 additions & 4 deletions modules/ethflow-watcher/src/lib.rs
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@@ -1,10 +1,13 @@
//! # ethflow-watcher (Shepherd module)
//!
//! Subscribes to `CoWSwapOnchainOrders.OrderPlacement` logs from the
//! CoWSwap EthFlow contracts and resubmits each placed order through
//! the orderbook API with `Signature::Eip1271`. The EthFlow contract
//! is the EIP-1271 verifier, so the `from` field on the resubmission
//! is the contract address (not the original native-token seller).
//! canonical CoWSwap EthFlow contracts and verifies the orderbook's
//! native indexer caught each placement via `GET /api/v1/orders/{uid}`.
//! See `strategy.rs` for the design rationale (COW-1076): the orderbook
//! backend indexes EthFlow `OrderPlacement` events server-side with
//! its own dual-validTo bookkeeping, so `POST /api/v1/orders` is
//! structurally the wrong endpoint for on-chain EthFlow orders. The
//! module observes and verifies, it does not submit.
//!
//! ## Module layout (BLEU-855)
//!
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