[thedavidmeister]

Problem

1. IRaindexV6.clear3's implementation (raindex.deploy) feeds bobSignedContext to alice's calculate eval and aliceSignedContext to bob's, while quote2/takeOrders4 route signed context to the order it belongs to. Per the ruling on clear3 cross-wires alice/bob signed context vs its interface docs; next version must fix it with a loud break raindex.deploy#2850, V6 keeps the shipped behaviour and the fix lands in the next interface version with a loud break.
2. Ruling (2026-10-25): V7 also carries EIP-712 SignedContextV2 (feat: IInterpreterCallerV5 with EIP-712 SignedContextV2; drop V1 LibContext and rain-lib-hash rainlang.interface#134). SignedContextV1 is a bare-keccak signature with no domain.

Fix

• New stable IRaindexV7 (+ IRaindexV7OrderTaker, IRaindexV7ArbOrderTaker); V6 family moves to deprecated/v6/.
• clear4 replaces clear3, documented as routing aliceSignedContext to alice's own eval and bobSignedContext to bob's.
• Every signed context is SignedContextV2 from IInterpreterCallerV5; IRaindexV7 is IERC3156FlashLender, IInterpreterCallerV5.
• Structs carrying signed context are re-versioned in IRaindexV7.sol: TaskV3, TakeOrderConfigV5, TakeOrdersConfigV6, QuoteV3 (fields unchanged except signedContext).
• Every function/event whose ABI changes takes the next version: entask3, deposit5, withdraw5, quote3, addOrder5, removeOrder4, takeOrders5, TakeOrderV4, arb6. onTakeOrders2 and all other events are unchanged.
• rainlang-interface 0.2.14 from the Soldeer registry (sol-v0.2.14 = f665f7fcbeade38f525853c94d61570080e07621, the #134 merge); deprecated files follow IInterpreterCallerV4's move to deprecated/v3/.

Why this is correct

clear4 keeps clear's calldata shape, so a new name is what makes callers built for V6's swapped routing revert at dispatch instead of silently flipping. The SignedContextV2 change alters every struct that carries signed context, so those structs and every entrypoint taking them get new versions per the repo's versioned-naming convention: no V7 name shares a selector with a V6 one of different meaning.

Downstream migration

• Offchain signers sign EIP-712 typed data (eth_signTypedData_v4) for SignedContextV2(address signer,bytes32[] context) under a domain of their choosing, and send domainSeparator with the context.
• Expressions: signed-context data columns shift right by one (a domain separators column sits after the signers column); expressions must pin each signer's domain from that column.
• Callers move to the renamed entrypoints and V3/V5/V6 structs above.

Evidence

Head d7e43ba: registry 0.2.14 src/ is byte-identical to rainlang.interface at f665f7f; forge build OK; commit hooks (rainix static) passed. Previous head cee2eff: forge fmt --check, forge lint -D warnings, pre-commit run --all-files and CI all passed. The repo has no tests.

QA

• Discriminating tests: n/a - interface-only repo with no executable code; routing, domain column and EIP-712 signing are tested in Route each clear4 signed context to its own order raindex.deploy#2920.
• Mutations applied: n/a - no executable lines; mutation pass lives in raindex.deploy.
• Oracle: ruling on clear3 cross-wires alice/bob signed context vs its interface docs; next version must fix it with a loud break raindex.deploy#2850; IInterpreterCallerV5/LibContext.buildV2 at the #134 merge.
• Category check: every SignedContextV1 in IRaindexV7 and the structs it uses is replaced; deprecated interfaces keep V1.

Blocked

Keep draft with rainlanguage/raindex.deploy#2920. rainlang-interface 0.2.14 has published and is pinned from the registry.

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Commits

Reviewing files that changed from the base of the PR and between b8b5872 and 7107727.

Files ignored due to path filters: 1

• soldeer.lock is excluded by !**/*.lock

Files selected for processing: 12

• CLAUDE.md
• foundry.toml
• remappings.txt
• src/interface/IRaindexV7.sol
• src/interface/IRaindexV7ArbOrderTaker.sol
• src/interface/IRaindexV7OrderTaker.sol
• src/interface/deprecated/v1/IOrderBookV1.sol
• src/interface/deprecated/v2/IOrderBookV2.sol
• src/interface/deprecated/v3/IOrderBookV3.sol
• src/interface/deprecated/v4/IOrderBookV4.sol
• src/interface/deprecated/v5/IOrderBookV5.sol
• src/interface/deprecated/v6/IRaindexV6.sol

Walkthrough

The pull request adds the IRaindexV7 order-book interface and its taker callback interfaces. It updates CLAUDE.md to identify V7 as current and corrects two import paths in the deprecated V6 interface.

Changes

V7 Interfaces

Layer / File(s)	Summary
V7 order-book and taker interfaces src/interface/IRaindexV7.sol, src/interface/IRaindexV7OrderTaker.sol, src/interface/IRaindexV7ArbOrderTaker.sol	Adds IRaindexV7 declarations for vault operations, order lifecycle, quoting, taking, clearing, flash lending, and interpreter tasks. Adds the onTakeOrders2 callback and the payable arb5 entry point.
Version references and V6 imports CLAUDE.md, src/interface/deprecated/v6/IRaindexV6.sol	Updates the documentation’s current and deprecated interface versions and naming example. Corrects the flash-lender and order-book type import paths in IRaindexV6.sol.

Priority: Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Feature

Possibly related PRs

• rainlanguage/raindex.interface#77: Updates dependencies that provide types imported by the V7 interface and moved V6 interface.
• rainlanguage/raindex.interface#78: Updates the V6 unsupported-token warning and documents related token behavior in the V7 interface.

Merge Risk: Minimal · up to b8b58

This change adds the V7 interfaces and moves the V6 ones under deprecated/. It has no runtime effect and has no merge-blocking issues. The only follow-up is a small CLAUDE.md note saying that import-only edits are allowed when a deprecated interface is relocated.

Pre-merge checks: 5

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly describes the key behavioral change in IRaindexV7: clear4 routes each order's signed context to the corresponding evaluation. It is specific, concise, and directly related to the…
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
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.

Full details: Title check

Explanation

The title clearly describes the key behavioral change in IRaindexV7: clear4 routes each order's signed context to the corresponding evaluation. It is specific, concise, and directly related to the pull request objectives.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (5 skipped: 5 unsupported.)

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Actionable comments posted: 1

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• 🪄 Fix comments: Fix CodeRabbit comments on this PR

Prompt to fix review comments

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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @src/interface/deprecated/v6/IRaindexV6.sol:
- Line 5: Update the interface organization guidance associated with IRaindexV6
to state that relocating a stable interface into deprecated/v<N>/ permits only
the relative import updates required by the new location, while preserving its
declarations and behavior.

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Commits

Reviewing files that changed from the base of the PR and between 2955fce and b8b5872.

Files selected for processing: 7

• CLAUDE.md
• src/interface/IRaindexV7.sol
• src/interface/IRaindexV7ArbOrderTaker.sol
• src/interface/IRaindexV7OrderTaker.sol
• src/interface/deprecated/v6/IRaindexV6.sol
• src/interface/deprecated/v6/IRaindexV6ArbOrderTaker.sol
• src/interface/deprecated/v6/IRaindexV6OrderTaker.sol

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[thedavidmeister]

Consumer: rainlanguage/raindex.deploy#2920 (draft, pinned to this PR's head b8b5872 via soldeer git dep).

[linear]

RAI-3859

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