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Implement checkpoint sync (#2244)

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## Issue Addressed

Closes #1891
Closes #1784

## Proposed Changes

Implement checkpoint sync for Lighthouse, enabling it to start from a weak subjectivity checkpoint.

## Additional Info

- [x] Return unavailable status for out-of-range blocks requested by peers (#2561)
- [x] Implement sync daemon for fetching historical blocks (#2561)
- [x] Verify chain hashes (either in `historical_blocks.rs` or the calling module)
- [x] Consistency check for initial block + state
- [x] Fetch the initial state and block from a beacon node HTTP endpoint
- [x] Don't crash fetching beacon states by slot from the API
- [x] Background service for state reconstruction, triggered by CLI flag or API call.

Considered out of scope for this PR:

- Drop the requirement to provide the `--checkpoint-block` (this would require some pretty heavy refactoring of block verification)


Co-authored-by: Diva M <divma@protonmail.com>
This commit is contained in:
Michael Sproul
2021-09-22 00:37:28 +00:00
parent 280e4fe23d
commit 9667dc2f03
71 changed files with 4012 additions and 459 deletions
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2
beacon_node/client/Cargo.toml
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@@ -32,6 +32,8 @@ futures = "0.3.7"
reqwest = { version = "0.11.0", features = ["native-tls-vendored"] }
url = "2.1.1"
eth1 = { path = "../eth1" }
eth2 = { path = "../../common/eth2" }
sensitive_url = { path = "../../common/sensitive_url" }
genesis = { path = "../genesis" }
task_executor = { path = "../../common/task_executor" }
environment = { path = "../../lighthouse/environment" }