[Merged by Bors] - Add --light-client-server flag and state cache utils #3714
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This was referenced Nov 11, 2022
pawanjay176
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Nov 11, 2022
| /// be kept to an absolute minimum, because holding the snapshot cache lock has the ability | ||
| /// to delay block import. | ||
| /// | ||
| /// If there is no appropriate state in the snapshot cache then one will be loaded from disk. |
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Just wondering, we prune away old finalized states right? If we do, then this function would return None for most of the old states, so we can't compute the old light client updates.
From the spec
Full nodes SHOULD provide the best derivable LightClientUpdate (according to is_better_update) for each sync committee period covering any epochs in range [max(ALTAIR_FORK_EPOCH, current_epoch - MIN_EPOCHS_FOR_BLOCK_REQUESTS), current_epoch]
Does tree states allow us to have old finalized states too somehow? :o
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Yeah this is a problem. I started a discussion about it on the R&D server: https://discord.com/channels/595666850260713488/595701319793377299/1040461376126197890
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So we just maintain a cache of LightClientUpdates forward from where we are synced instead of trying to fetch historic updates? Makes sense to me. Feel free to merge this :)
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bors r+ |
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## Issue Addressed Part of #3651. ## Proposed Changes Add a flag for enabling the light client server, which should be checked before gossip/RPC traffic is processed (e.g. #3693, #3711). The flag is available at runtime from `beacon_chain.config.enable_light_client_server`. Additionally, a new method `BeaconChain::with_mutable_state_for_block` is added which I envisage being used for computing light client updates. Unfortunately its performance will be quite poor on average because it will only run quickly with access to the tree hash cache. Each slot the tree hash cache is only available for a brief window of time between the head block being processed and the state advance at 9s in the slot. When the state advance happens the cache is moved and mutated to get ready for the next slot, which makes it no longer useful for merkle proofs related to the head block. Rather than spend more time trying to optimise this I think we should continue prototyping with this code, and I'll make sure `tree-states` is ready to ship before we enable the light client server in prod (cf. #3206). ## Additional Info I also fixed a bug in the implementation of `BeaconState::compute_merkle_proof` whereby the tree hash cache was moved with `.take()` but never put back with `.restore()`.
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## Proposed Changes Now that the Gnosis merge is scheduled, all users should have upgraded beyond Lighthouse v3.0.0. Accordingly we can delete schema migrations for versions prior to v3.0.0. ## Additional Info I also deleted the state cache stuff I added in #3714 as it turned out to be useless for the light client proofs due to the one-slot offset.
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## Proposed Changes Now that the Gnosis merge is scheduled, all users should have upgraded beyond Lighthouse v3.0.0. Accordingly we can delete schema migrations for versions prior to v3.0.0. ## Additional Info I also deleted the state cache stuff I added in #3714 as it turned out to be useless for the light client proofs due to the one-slot offset.
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## Proposed Changes Now that the Gnosis merge is scheduled, all users should have upgraded beyond Lighthouse v3.0.0. Accordingly we can delete schema migrations for versions prior to v3.0.0. ## Additional Info I also deleted the state cache stuff I added in #3714 as it turned out to be useless for the light client proofs due to the one-slot offset.
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## Issue Addressed Part of sigp#3651. ## Proposed Changes Add a flag for enabling the light client server, which should be checked before gossip/RPC traffic is processed (e.g. sigp#3693, sigp#3711). The flag is available at runtime from `beacon_chain.config.enable_light_client_server`. Additionally, a new method `BeaconChain::with_mutable_state_for_block` is added which I envisage being used for computing light client updates. Unfortunately its performance will be quite poor on average because it will only run quickly with access to the tree hash cache. Each slot the tree hash cache is only available for a brief window of time between the head block being processed and the state advance at 9s in the slot. When the state advance happens the cache is moved and mutated to get ready for the next slot, which makes it no longer useful for merkle proofs related to the head block. Rather than spend more time trying to optimise this I think we should continue prototyping with this code, and I'll make sure `tree-states` is ready to ship before we enable the light client server in prod (cf. sigp#3206). ## Additional Info I also fixed a bug in the implementation of `BeaconState::compute_merkle_proof` whereby the tree hash cache was moved with `.take()` but never put back with `.restore()`.
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## Proposed Changes Now that the Gnosis merge is scheduled, all users should have upgraded beyond Lighthouse v3.0.0. Accordingly we can delete schema migrations for versions prior to v3.0.0. ## Additional Info I also deleted the state cache stuff I added in sigp#3714 as it turned out to be useless for the light client proofs due to the one-slot offset.
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Squashed commit of the following: commit ad08d07 Author: Paul Hauner <[email protected]> Date: Mon Dec 5 16:51:06 2022 +1100 Remove crits for late block commit 8e85d62 Author: Paul Hauner <[email protected]> Date: Mon Dec 5 16:48:43 2022 +1100 Downgrade log for payload reveal failure commit 84392d6 Author: Michael Sproul <[email protected]> Date: Fri Dec 2 00:07:43 2022 +0000 Delete DB schema migrations for v11 and earlier (sigp#3761) ## Proposed Changes Now that the Gnosis merge is scheduled, all users should have upgraded beyond Lighthouse v3.0.0. Accordingly we can delete schema migrations for versions prior to v3.0.0. ## Additional Info I also deleted the state cache stuff I added in sigp#3714 as it turned out to be useless for the light client proofs due to the one-slot offset. commit 18c9be5 Author: Mac L <[email protected]> Date: Thu Dec 1 06:03:53 2022 +0000 Add API endpoint to count statuses of all validators (sigp#3756) ## Issue Addressed sigp#3724 ## Proposed Changes Adds an endpoint to quickly count the number of occurances of each status in the validator set. ## Usage ```bash curl -X GET "http://localhost:5052/lighthouse/ui/validator_count" -H "accept: application/json" | jq ``` ```json { "data": { "active_ongoing":479508, "active_exiting":0, "active_slashed":0, "pending_initialized":28, "pending_queued":0, "withdrawal_possible":933, "withdrawal_done":0, "exited_unslashed":0, "exited_slashed":3 } } ``` commit 2211504 Author: Michael Sproul <[email protected]> Date: Wed Nov 30 05:22:58 2022 +0000 Prioritise important parts of block processing (sigp#3696) ## Issue Addressed Closes sigp#2327 ## Proposed Changes This is an extension of some ideas I implemented while working on `tree-states`: - Cache the indexed attestations from blocks in the `ConsensusContext`. Previously we were re-computing them 3-4 times over. - Clean up `import_block` by splitting each part into `import_block_XXX`. - Move some stuff off hot paths, specifically: - Relocate non-essential tasks that were running between receiving the payload verification status and priming the early attester cache. These tasks are moved after the cache priming: - Attestation observation - Validator monitor updates - Slasher updates - Updating the shuffling cache - Fork choice attestation observation now happens at the end of block verification in parallel with payload verification (this seems to save 5-10ms). - Payload verification now happens _before_ advancing the pre-state and writing it to disk! States were previously being written eagerly and adding ~20-30ms in front of verifying the execution payload. State catchup also sometimes takes ~500ms if we get a cache miss and need to rebuild the tree hash cache. The remaining task that's taking substantial time (~20ms) is importing the block to fork choice. I _think_ this is because of pull-tips, and we should be able to optimise it out with a clever total active balance cache in the state (which would be computed in parallel with payload verification). I've decided to leave that for future work though. For now it can be observed via the new `beacon_block_processing_post_exec_pre_attestable_seconds` metric. Co-authored-by: Michael Sproul <[email protected]> commit b4f4c0d Author: Divma <[email protected]> Date: Wed Nov 30 03:21:35 2022 +0000 Ipv6 bootnodes (sigp#3752) ## Issue Addressed our bootnodes as of now support only ipv4. this makes it so that they support ipv6 ## Proposed Changes - Adds code necessary to update the bootnodes to run on dual stack nodes and therefore contact and store ipv6 nodes. - Adds some metrics about connectivity type of stored peers. It might have been nice to see some metrics over the sessions but that feels out of scope right now. ## Additional Info - some code quality improvements sneaked in since the changes seemed small - I think it depends on the OS, but enabling mapped addresses on an ipv6 node without dual stack support enabled could fail silently, making these nodes effectively ipv6 only. In the future I'll probably change this to use two sockets, which should fail loudly commit 3534c85 Author: GeemoCandama <[email protected]> Date: Tue Nov 29 08:19:27 2022 +0000 Optimize finalized chain sync by skipping newPayload messages (sigp#3738) ## Issue Addressed sigp#3704 ## Proposed Changes Adds is_syncing_finalized: bool parameter for block verification functions. Sets the payload_verification_status to Optimistic if is_syncing_finalized is true. Uses SyncState in NetworkGlobals in BeaconProcessor to retrieve the syncing status. ## Additional Info I could implement FinalizedSignatureVerifiedBlock if you think it would be nicer. commit a2969ba Author: Paul Hauner <[email protected]> Date: Tue Nov 29 05:51:42 2022 +0000 Improve debugging experience for builder proposals (sigp#3725) ## Issue Addressed NA ## Proposed Changes This PR sets out to improve the logging/metrics experience when interacting with the builder. Namely, it: - Adds/changes metrics (see "Metrics Changes" section). - Adds new logs which show the duration of requests to the builder/local EL. - Refactors existing logs for consistency and so that the `parent_hash` is include in all relevant logs (we can grep for this field when trying to trace the flow of block production). Additionally, when I was implementing this PR I noticed that we skip some verification of the builder payload in the scenario where the builder return `Ok` but the local EL returns with `Err`. Namely, we were skipping the bid signature and other values like parent hash and prev randao. In this PR I've changed it so we *always* check these values and reject the bid if they're incorrect. With these changes, we'll sometimes choose to skip a proposal rather than propose something invalid -- that's the only side-effect to the changes that I can see. ## Metrics Changes - Changed: `execution_layer_request_times`: - `method = "get_blinded_payload_local"`: time taken to get a payload from a local EE. - `method = "get_blinded_payload_builder"`: time taken to get a blinded payload from a builder. - `method = "post_blinded_payload_builder"`: time taken to get a builder to reveal a payload they've previously supplied us. - `execution_layer_get_payload_outcome` - `outcome = "success"`: we successfully produced a payload from a builder or local EE. - `outcome = "failure"`: we were unable to get a payload from a builder or local EE. - New: `execution_layer_builder_reveal_payload_outcome` - `outcome = "success"`: a builder revealed a payload from a signed, blinded block. - `outcome = "failure"`: the builder did not reveal the payload. - New: `execution_layer_get_payload_source` - `type = "builder"`: we used a payload from a builder to produce a block. - `type = "local"`: we used a payload from a local EE to produce a block. - New: `execution_layer_get_payload_builder_rejections` has a `reason` field to describe why we rejected a payload from a builder. - New: `execution_layer_payload_bids` tracks the bid (in gwei) from the builder or local EE (local EE not yet supported, waiting on EEs to expose the value). Can only record values that fit inside an i64 (roughly 9 million ETH). ## Additional Info NA commit 99ec9d9 Author: kevinbogner <[email protected]> Date: Mon Nov 28 10:05:43 2022 +0000 Add Run a Node guide (sigp#3681) ## Issue Addressed Related to sigp#3672 ## Proposed Changes - Added a guide to run a node. Mainly, copy and paste from 'Merge Migration' and 'Checkpoint Sync'. - Ranked it high in ToC: - Introduction - Installation - Run a Node - Become a Validator ... - Hid 'Merge Migration' in ToC. ## Additional Info - Should I add/rephrase/delete something? - Now there is some redundancy: - 'Run a node' and 'Checkpoint Sync' contain similar information. - Same for 'Run a node' and 'Become a Validator'. Co-authored-by: kevinbogner <[email protected]> Co-authored-by: Michael Sproul <[email protected]> commit 2779017 Author: Age Manning <[email protected]> Date: Mon Nov 28 07:36:52 2022 +0000 Gossipsub fast message id change (sigp#3755) For improved consistency, this mixes in the topic into our fast message id for more consistent tracking of messages across topics. commit c881b80 Author: Mac L <[email protected]> Date: Mon Nov 28 00:22:53 2022 +0000 Add CLI flag for gui requirements (sigp#3731) ## Issue Addressed sigp#3723 ## Proposed Changes Adds a new CLI flag `--gui` which enables all the various flags required for the gui to function properly. Currently enables the `--http` and `--validator-monitor-auto` flags. commit 969ff24 Author: Mac L <[email protected]> Date: Fri Nov 25 07:57:11 2022 +0000 Add CLI flag to opt in to world-readable log files (sigp#3747) ## Issue Addressed sigp#3732 ## Proposed Changes Add a CLI flag to allow users to opt out of the restrictive permissions of the log files. ## Additional Info This is not recommended for most users. The log files can contain sensitive information such as validator indices, public keys and API tokens (see sigp#2438). However some users using a multi-user setup may find this helpful if they understand the risks involved. commit e9bf7f7 Author: antondlr <[email protected]> Date: Fri Nov 25 07:57:10 2022 +0000 remove commas from comma-separated kv pairs (sigp#3737) ## Issue Addressed Logs are in comma separated kv list, but the values sometimes contain commas, which breaks parsing commit d5a2de7 Author: Giulio rebuffo <[email protected]> Date: Fri Nov 25 05:19:00 2022 +0000 Added LightClientBootstrap V1 (sigp#3711) ## Issue Addressed Partially addresses sigp#3651 ## Proposed Changes Adds server-side support for light_client_bootstrap_v1 topic ## Additional Info This PR, creates each time a bootstrap without using cache, I do not know how necessary a cache is in this case as this topic is not supposed to be called frequently and IMHO we can just prevent abuse by using the limiter, but let me know what you think or if there is any caveat to this, or if it is necessary only for the sake of good practice. Co-authored-by: Pawan Dhananjay <[email protected]>
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## Issue Addressed Part of sigp#3651. ## Proposed Changes Add a flag for enabling the light client server, which should be checked before gossip/RPC traffic is processed (e.g. sigp#3693, sigp#3711). The flag is available at runtime from `beacon_chain.config.enable_light_client_server`. Additionally, a new method `BeaconChain::with_mutable_state_for_block` is added which I envisage being used for computing light client updates. Unfortunately its performance will be quite poor on average because it will only run quickly with access to the tree hash cache. Each slot the tree hash cache is only available for a brief window of time between the head block being processed and the state advance at 9s in the slot. When the state advance happens the cache is moved and mutated to get ready for the next slot, which makes it no longer useful for merkle proofs related to the head block. Rather than spend more time trying to optimise this I think we should continue prototyping with this code, and I'll make sure `tree-states` is ready to ship before we enable the light client server in prod (cf. sigp#3206). ## Additional Info I also fixed a bug in the implementation of `BeaconState::compute_merkle_proof` whereby the tree hash cache was moved with `.take()` but never put back with `.restore()`.
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## Proposed Changes Now that the Gnosis merge is scheduled, all users should have upgraded beyond Lighthouse v3.0.0. Accordingly we can delete schema migrations for versions prior to v3.0.0. ## Additional Info I also deleted the state cache stuff I added in sigp#3714 as it turned out to be useless for the light client proofs due to the one-slot offset.
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Issue Addressed
Part of #3651.
Proposed Changes
Add a flag for enabling the light client server, which should be checked before gossip/RPC traffic is processed (e.g. #3693, #3711). The flag is available at runtime from
beacon_chain.config.enable_light_client_server.Additionally, a new method
BeaconChain::with_mutable_state_for_blockis added which I envisage being used for computing light client updates. Unfortunately its performance will be quite poor on average because it will only run quickly with access to the tree hash cache. Each slot the tree hash cache is only available for a brief window of time between the head block being processed and the state advance at 9s in the slot. When the state advance happens the cache is moved and mutated to get ready for the next slot, which makes it no longer useful for merkle proofs related to the head block. Rather than spend more time trying to optimise this I think we should continue prototyping with this code, and I'll make suretree-statesis ready to ship before we enable the light client server in prod (cf. #3206).Additional Info
I also fixed a bug in the implementation of
BeaconState::compute_merkle_proofwhereby the tree hash cache was moved with.take()but never put back with.restore().