[CRE-491] Move llo EVM-specific files to chainlink-evm

[pavel-raykov]

Supports smartcontractkit/chainlink#22586

[github-actions]

✅ API Diff Results - github.com/smartcontractkit/chainlink-evm

✅ Compatible Changes (3)

package github (1)

• com/smartcontractkit/chainlink-evm/pkg/llo/channeldefinitions — ➕ Added

pkg/llo (2)

• ChainScopedORM — ➕ Added

• NewChainScopedORM — ➕ Added

---

📄 View full apidiff report

[Copilot]

Pull request overview

This PR moves LLO (Low Latency Oracle) EVM-specific components into chainlink-evm to support downstream integration with the main chainlink repo (per linked PR). It introduces the channel definition cache implementation (static + on-chain), a chain-scoped ORM for persistence, accompanying tests, and updates module dependencies accordingly.

Changes:

• Add LLO channel definition cache implementation and factory (static JSON cache + on-chain event-driven cache).
• Add chain-scoped ORM for persisting/loading channel definitions, plus unit tests.
• Update go.mod/go.sum (and pkg/Makefile chainlink/v2 pin) to include required dependencies (notably chainlink-data-streams).

Reviewed changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
pkg/Makefile	Updates the pinned chainlink/v2 commit used by testdb preparation.
pkg/llo/orm.go	Adds chain-scoped ORM implementing channel definitions persistence/load/cleanup.
pkg/llo/orm_test.go	Adds DB-backed tests validating ORM behavior across chain selectors/addresses/donIDs.
pkg/llo/channeldefinitions/static_channel_definitions_cache.go	Adds a static (JSON-backed) channel definition cache implementation.
pkg/llo/channeldefinitions/onchain_channel_definition_cache.go	Adds on-chain log-driven channel definition cache, merge logic, persistence loop, and helpers.
pkg/llo/channeldefinitions/onchain_channel_definition_cache_test.go	Adds extensive unit tests for fetching, merging rules, persistence, and edge cases.
pkg/llo/channeldefinitions/channel_definition_cache_factory.go	Adds a factory that selects static vs on-chain cache based on plugin config.
pkg/llo/channeldefinitions/channel_definition_cache_factory_test.go	Adds tests for factory selection behavior.
go.mod	Bumps and adds dependencies required for moved LLO components (incl. chainlink-data-streams).
go.sum	Updates checksums for the dependency changes.
go.md	Updates dependency diagram to reflect new relationships (via chainlink-data-streams).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.