sui-forking: startup and wire sui-data-store apis

[stefan-mysten]

Description

• Builds an object cache chain: in-memory -> filesystem -> GraphQL.
• Fetches the startup checkpoint payload from gRPC in sui-forking, not through generic sui-data-store checkpoint APIs.
• Derives the post-checkpoint SuiSystemState, including the end-of-epoch case.
• Prefetches explicit startup object IDs into the object chain.
• Starts the server and exposes health/status plus gRPC get_object.
• Stores startup checkpoint summary/contents and executed tx/effects/events in ForkingStore memory so the minimal runtime works.
• Adds a smoke test in setup.rs that boots from startup state, executes one impersonated transaction, creates a checkpoint, and verifies the updated state is readable.

Start the server with

sui-forking start --network testnet

Test plan

Adds new tests

cargo nextest run -p sui-forking
cargo nextest run -p sui-forking -- impersonated_execution_smoke_test_updates_in_memory_state

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Release notes

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• Protocol:
• Nodes (Validators and Full nodes):
• gRPC:
• JSON-RPC:
• GraphQL:
• CLI:
• Rust SDK:
• Indexing Framework:

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2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
multisig-toolkit	Ignored		Mar 20, 2026 7:24pm
sui-kiosk	Ignored		Mar 20, 2026 7:24pm