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fix(trie): use direct Merkle value for database keys #2725

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merged 2 commits into from
Sep 22, 2022

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qdm12
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@qdm12 qdm12 commented Aug 4, 2022

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The problem is as follows in this example.

For a node A encoding to {1, 2}, its database key is {0, 0, 0, ..., 1, 2}. Another node B with > 32B encoding could (unlikely but still) hash to the same value {0, 0, 0, ..., 1, 2} as for A and that would conflict in the database.

The solution is to NOT force the database key to be 32B always, and to keep it plainly as the Merkle value of the node (32B or less). This should also occupy less space in the database eventually.

  • Storage KV database node key has now the length of the Merkle value and is no longer forced to 32B
  • Renaming XXXHashesSet to XXXMerkleValues since it's not just hashes
  • Renaming deletedKeys to deletedMerkleValueToBlockNumber in dot/state
  • Renaming methods XXXNodeHashes to XXXMerkleValues

Tests

go test -tags integration github.com/ChainSafe/gossamer

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@timwu20

@qdm12 qdm12 marked this pull request as ready for review August 4, 2022 15:14
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codecov bot commented Aug 4, 2022

Codecov Report

Merging #2725 (c304159) into development (9dc11e4) will decrease coverage by 0.10%.
The diff coverage is 50.00%.

Additional details and impacted files
@@               Coverage Diff               @@
##           development    #2725      +/-   ##
===============================================
- Coverage        63.45%   63.34%   -0.11%     
===============================================
  Files              217      217              
  Lines            27059    27058       -1     
===============================================
- Hits             17170    17141      -29     
- Misses            8327     8352      +25     
- Partials          1562     1565       +3     

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lgtm!

@qdm12 qdm12 force-pushed the qdm12/trie/fix-updateGeneration branch 2 times, most recently from c2c85f5 to 6609855 Compare August 11, 2022 14:19
lib/trie/trie.go Outdated
deletedHashes[deletedHash] = struct{}{}
deletedMerkleValueBytes := currentNode.MerkleValue
if len(deletedMerkleValueBytes) > 0 {
deletedMerkleValueString := string(deletedMerkleValueBytes)
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nit deletedMerkleValue instead, string feels redundant

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Good point, renamed to deletedMerkleValue as suggested

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It's enforced that the node value <= 32B yes? Seems like but just wanted to double check

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lgtm

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qdm12 commented Sep 22, 2022

It's enforced that the node value <= 32B yes? Seems like but just wanted to double check

The Merkle value is <= 32B (node scale encoding if it is smaller than 32B, otherwise the 32B blake2b hash digest of the node scale encoding)

@qdm12 qdm12 force-pushed the qdm12/trie/fix-updateGeneration branch from f388cfa to 328c6c3 Compare September 22, 2022 12:17
@qdm12 qdm12 force-pushed the qdm12/trie/fix-updateGeneration branch from 328c6c3 to c304159 Compare September 22, 2022 12:51
@qdm12 qdm12 merged commit 1a3c3ae into development Sep 22, 2022
@qdm12 qdm12 deleted the qdm12/trie/fix-updateGeneration branch September 22, 2022 13:15
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timwu20 commented Sep 22, 2022

Just looked at this. Great work!

rrtti pushed a commit to polkadot-fellows/seeding that referenced this pull request Sep 29, 2022
I am Quentin Mc Gaw, a software engineer working the Go Polkadot host **Gossamer**.
I have been working full time on Gossamer since October 2021, mostly on the state trie and storage.
I have also made a [few minor pull requests](https://github.com/w3f/polkadot-spec/pulls?q=is%3Apr+is%3Aclosed+author%3Aqdm12) to the Polkadot specification repository.

I am requesting to join the Fellowship at rank 1.

## Main contributions

### Gossamer

- Fix memory leaks
  - Trie encoding buffer pools usage fixed [#2009](ChainSafe/gossamer#2009)
  - Fix state map of tries memory leak [#2286](ChainSafe/gossamer#2286)
  - Fix sync benchmark [#2234](ChainSafe/gossamer#2234)
- Trie proof fixes ([#2604](ChainSafe/gossamer#2604), [#2661](ChainSafe/gossamer#2661))
- Fix end to end tests orchestration ([#2470](ChainSafe/gossamer#2470), [#2452](ChainSafe/gossamer#2452), [#2385](ChainSafe/gossamer#2385), [#2370](ChainSafe/gossamer#2370))
- State trie statistics ([#2378](ChainSafe/gossamer#2378), [#2310](ChainSafe/gossamer#2310), [#2272](ChainSafe/gossamer#2272))
- State trie fixes and improvements
  - Only deep copy nodes when mutation is certain [#2352](ChainSafe/gossamer#2352) and [#2223](ChainSafe/gossamer#2223)
  - Only deep copy necessary fields of a node [#2384](ChainSafe/gossamer#2384)
  - Use Merkle values for database keys instead of always hash [#2725](ChainSafe/gossamer#2725)
  - Opportunistic parallel Merkle value commputing [#2081](ChainSafe/gossamer#2081)
- Grandpa capped number of tracked messages ([#2490](ChainSafe/gossamer#2490), [#2485](ChainSafe/gossamer#2485))
- Add pprof HTTP service for profiling [#1991](ChainSafe/gossamer#1991)

Ongoing work:

- State trie lazy loading and caching
- State trie v1 support ([#2736](ChainSafe/gossamer#2736), [#2747](ChainSafe/gossamer#2747), [#2687](ChainSafe/gossamer#2687), [#2686](ChainSafe/gossamer#2686), [#2685](ChainSafe/gossamer#2685), [#2673](ChainSafe/gossamer#2673), [#2611](ChainSafe/gossamer#2611), [#2530](ChainSafe/gossamer#2530))

### Polkadot specification

➡️ [Pull requests from qdm12](https://github.com/w3f/polkadot-spec/pulls?q=is%3Apr+is%3Aclosed+author%3Aqdm12)
github-actions bot pushed a commit that referenced this pull request Nov 23, 2022
# [0.7.0](v0.6.0...v0.7.0) (2022-11-23)

### Bug Fixes

* **chain:** update ed25519 addresses in dev/gssmr genesis files ([#2225](#2225)) ([5f47d8b](5f47d8b))
* **ci:** caching of Go caches ([#2451](#2451)) ([ce3c10c](ce3c10c))
* **ci:** codecov.yml configuration ([#2698](#2698)) ([d4fc383](d4fc383))
* **ci:** comment skip code for required workflows ([#2312](#2312)) ([45dce9b](45dce9b))
* **ci:** copyright workflow to exit if different files ([#2487](#2487)) ([89c32ae](89c32ae))
* **ci:** deepsource toml configuration ([#2744](#2744)) ([86a70de](86a70de))
* **ci:** embed v0.9.20 runtime, update test suite, and ci workflows ([#2543](#2543)) ([0fff418](0fff418)), closes [#2419](#2419) [#2561](#2561) [#2572](#2572) [#2581](#2581) [#2671](#2671)
* **ci:** fix staging Dockerfile ([#2474](#2474)) ([ae04b80](ae04b80))
* **ci:** mocks checking fixes ([#2274](#2274)) ([d1308e0](d1308e0))
* **ci:** run devnet module unit tests ([#2756](#2756)) ([f635c59](f635c59))
* **ci:** run golangci-lint on integration tests ([#2275](#2275)) ([3ae3401](3ae3401))
* **cmd:** allow --genesis flag to be passed to base command ([#2427](#2427)) ([7f5b5aa](7f5b5aa))
* **cmd:** avoid nil pointer dereference ([#2578](#2578)) ([f2cdfea](f2cdfea))
* **config:** temporary fix for pprof enabled setting precedence ([#2786](#2786)) ([d4d6262](d4d6262))
* **core:** fix txn pool for latest runtime ([#2809](#2809)) ([1551e66](1551e66))
* **deps:** upgrade chaindb to remove badger logs ([#2738](#2738)) ([e0c5706](e0c5706))
* **devnet:** Fix build workflow for devnet ([#2125](#2125)) ([0375fc2](0375fc2))
* **Dockerfile:** remove script entrypoint ([#2707](#2707)) ([abd161b](abd161b))
* **dot/core:** `RuntimeInstance` interface `Version` signature ([#2783](#2783)) ([7d66ec0](7d66ec0))
* **dot/core:** fix the race condition in TrieState ([#2499](#2499)) ([804069c](804069c)), closes [#2402](#2402)
* **dot/digest:** BABE NextEpochData and NextConfigData should be set on finalization ([#2339](#2339)) ([e991cc8](e991cc8))
* **dot/digest:** verify if next epoch already contains some definition ([#2472](#2472)) ([a2ac6c2](a2ac6c2))
* **dot/netwok:** check for duplicate message earlier ([#2435](#2435)) ([d62503f](d62503f))
* **dot/network:** change BlockRequestMessage number from uint64 to uint32 ([8105cd4](8105cd4))
* **dot/network:** close notifications streams ([#2093](#2093)) ([de6e7c9](de6e7c9)), closes [#2046](#2046)
* **dot/network:** fixing errMissingHandshakeMutex ([#2303](#2303)) ([eb07a53](eb07a53))
* **dot/network:** memory improvement for network buffers ([#2233](#2233)) ([fd9b70d](fd9b70d))
* **dot/network:** public IP address logging ([#2140](#2140)) ([9e21587](9e21587))
* **dot/network:** re-add nil mutex check for disconnected peer ([#2408](#2408)) ([9b39bd1](9b39bd1))
* **dot/network:** remove `defer cancel()` inside loop ([#2248](#2248)) ([9e360a5](9e360a5))
* **dot/network:** resize bytes slice buffer if needed ([#2291](#2291)) ([8db8b2a](8db8b2a))
* **dot/peerset:** fix sending on closed channel race condition when dropping peer ([#2573](#2573)) ([2fa5d8a](2fa5d8a))
* **dot/peerset:** remove race conditions from `peerset` package ([#2267](#2267)) ([df09d45](df09d45))
* **dot/rpc/modules:** grandpa.proveFinality update parameters, fix bug ([#2576](#2576)) ([e7749cf](e7749cf))
* **dot/rpc/modules:** rpc.state.queryStorage fixed ([#2565](#2565)) ([1ec0d47](1ec0d47))
* **dot/rpc:** include unsafe flags to be considered by RPC layer ([#2483](#2483)) ([3822257](3822257))
* **dot/state/epoch, lib/babe:** enable block production through epochs without rely on finalization ([#2593](#2593)) ([a0a1804](a0a1804))
* **dot/state:** actually prune finalized tries from memory ([#2196](#2196)) ([e4bc375](e4bc375))
* **dot/state:** change map of tries implementation to have working garbage collection ([#2206](#2206)) ([fada46b](fada46b))
* **dot/state:** inject mutex protected tries to states ([#2287](#2287)) ([67a9bbb](67a9bbb))
* **dot/subscription:** check websocket message from untrusted data ([#2527](#2527)) ([1f20d98](1f20d98))
* **dot/subscription:** unsafe type casting from untrusted input ([#2529](#2529)) ([1015733](1015733))
* **dot/sync, dot/rpc:** implement HighestBlock ([#2195](#2195)) ([f8d8657](f8d8657))
* **dot/sync:** cleanup logs; don't log case where we fail to get parent while processing ([#2188](#2188)) ([cb360ab](cb360ab))
* **dot/sync:** fix "block with unknown header is ready" error ([#2191](#2191)) ([483466f](483466f))
* **dot/sync:** fix `Test_lockQueue_threadSafety` ([#2605](#2605)) ([223cfbb](223cfbb))
* **dot/sync:** Fix flaky tests `Test_chainSync_logSyncSpeed` and `Test_chainSync_start` ([#2610](#2610)) ([7e1014b](7e1014b))
* **dot/sync:** Gossip `BlockAnnounceMessage` only after  successfully imported ([#2885](#2885)) ([69031a6](69031a6))
* **dot/sync:** remove block announcement in `bootstrap` sync mode ([#2906](#2906)) ([2b4c257](2b4c257))
* **dot/sync:** remove max size limit from ascending block requests ([#2256](#2256)) ([e287d7e](e287d7e))
* **dot/sync:** sync benchmark ([#2234](#2234)) ([2f3aef8](2f3aef8))
* **dot/telemetry:** telemetry hashes to be in the hexadecimal format ([#2194](#2194)) ([9b48106](9b48106))
* **dot:** database close error checks ([#2948](#2948)) ([bdb0eea](bdb0eea))
* **dot:** no error logged for init check ([#2502](#2502)) ([2971325](2971325))
* ensure we convert the `uint` type ([#2626](#2626)) ([792e53f](792e53f))
* fix logger mutex locking in `.New` method ([#2114](#2114)) ([e7207ed](e7207ed))
* **internal/log:** log level `DoNotChange` ([#2672](#2672)) ([0008b59](0008b59))
* **levels-logged:** Fix log levels logging at start ([#2236](#2236)) ([a90a6e0](a90a6e0))
* **lib/babe:** check if authority index is in the `authorities` range ([#2601](#2601)) ([1072888](1072888))
* **lib/babe:** ensure the slot time is correct before build a block ([#2648](#2648)) ([78c03b6](78c03b6))
* **lib/babe:** epoch context error wrapping ([#2484](#2484)) ([c053dea](c053dea))
* **lib/babe:** Unrestricted Loop When Building Blocks (GSR-19) ([#2632](#2632)) ([139ad89](139ad89))
* **lib/blocktree:** reimplement `BestBlockHash` to take into account primary blocks in fork choice rule ([#2254](#2254)) ([1a368e2](1a368e2))
* **lib/grandpa:** avoid spamming round messages ([#2688](#2688)) ([b0042b8](b0042b8))
* **lib/grandpa:** capped number of tracked commit messages ([#2490](#2490)) ([47c23e6](47c23e6))
* **lib/grandpa:** capped number of tracked vote messages ([#2485](#2485)) ([d2ee47e](d2ee47e)), closes [#1531](#1531)
* **lib/grandpa:** check equivocatory votes count ([#2497](#2497)) ([014629d](014629d)), closes [#2401](#2401)
* **lib/grandpa:** Duplicate votes is GRANDPA are counted as equivocatory votes (GSR-11) ([#2624](#2624)) ([422e7b3](422e7b3))
* **lib/grandpa:** Storing Justification Allows Extra Bytes (GSR-13) ([#2618](#2618)) ([0fcde63](0fcde63))
* **lib/grandpa:** update grandpa protocol ID ([#2678](#2678)) ([3be75b2](3be75b2))
* **lib/grandpa:** various finality fixes, improves cross-client finality ([#2368](#2368)) ([c04d185](c04d185))
* **lib/grandpa:** verify equivocatory votes in grandpa justifications ([#2486](#2486)) ([368f8b6](368f8b6))
* **lib/runtime:** avoid caching version in runtime instance ([#2425](#2425)) ([7ab31f0](7ab31f0))
* **lib/runtime:** stub v0.9.17 host API functions ([#2420](#2420)) ([6a7b223](6a7b223))
* **lib/trie:** `handleDeletion` generation propagation ([24c303d](24c303d))
* **lib/trie:** `PopulateMerkleValues` functionality changes and fixes ([#2871](#2871)) ([7131290](7131290))
* **lib/trie:** Check for root in EncodeAndHash ([#2359](#2359)) ([087db89](087db89))
* **lib/trie:** Make sure writing and reading a trie to disk gives the same trie  and cover more store/load child trie related test cases ([#2302](#2302)) ([7cd4118](7cd4118))
* **lib/trie:** prepare trie nodes for mutation only when needed ([#2834](#2834)) ([26868df](26868df))
* **lib/trie:** remove map deletion at `loadProof` ([#2259](#2259)) ([fbd13d2](fbd13d2))
* **lint:** fix issues found by golangcilint 1.47.3 ([#2715](#2715)) ([5765e67](5765e67))
* **mocks:** add missing `//go:generate` for mocks ([#2273](#2273)) ([f4f7465](f4f7465))
* **pprof:** pprofserver flag changed to boolean ([#2205](#2205)) ([be00a69](be00a69))
* **staging:** revise datadog-agent start process ([#2935](#2935)) ([36ce37d](36ce37d))
* **state/epoch:** assign epoch 1 when block number is 0 ([#2592](#2592)) ([e5c8cf5](e5c8cf5))
* **state/grandpa:** track changes across forks ([#2519](#2519)) ([3ab76bc](3ab76bc))
* **tests:** `TestAuthorModule_HasSessionKeys_Integration` ([#2932](#2932)) ([8d809aa](8d809aa))
* **tests:** fix block body regex in `TestChainRPC` ([#2805](#2805)) ([b0680f8](b0680f8))
* **tests:** Fix RFC3339 regex for log unit tests ([9caea2a](9caea2a))
* **tests:** Fix wasmer flaky sorts ([#2643](#2643)) ([7eede9a](7eede9a))
* **tests:** handle node crash during waiting ([#2691](#2691)) ([843bd50](843bd50))
* **tests:** update block body regex in `TestChainRPC` ([#2674](#2674)) ([055e5c3](055e5c3))
* **trie:** decode inline child nodes ([#2369](#2369)) ([9efde47](9efde47))
* **trie:** descendants count for clear prefix ([#2606](#2606)) ([1826896](1826896))
* **trie:** disallow empty byte slice node values ([#2927](#2927)) ([d769d1c](d769d1c))
* **trie:** equality differentiate nil and empty storage values ([#2969](#2969)) ([72a08ec](72a08ec))
* **trie:** no in-memory caching of node encoding ([#2919](#2919)) ([856780b](856780b))
* **trie:** Panic when deleting nonexistent keys from trie (GSR-10) ([#2609](#2609)) ([7886318](7886318))
* **trie:** remove encoding buffers pool ([#2929](#2929)) ([f4074cc](f4074cc))
* **trie:** use cached Merkle values for root hash ([#2943](#2943)) ([ec2549a](ec2549a))
* **trie:** use direct Merkle value for database keys ([#2725](#2725)) ([1a3c3ae](1a3c3ae))
* upgrade auto-generated mocks ([#2910](#2910)) ([a2975a5](a2975a5))
* **wasmer:** error logs for signature verification ([#2752](#2752)) ([363c080](363c080))
* **wasmer:** fix flaky sort in `Test_ext_crypto_sr25519_public_keys_version_1` ([#2607](#2607)) ([c061b35](c061b35))

### Features

* **build:** add `github.com/breml/rootcerts` ([#2695](#2695)) ([c74a5b0](c74a5b0))
* **build:** binary built-in timezone data ([#2697](#2697)) ([fdd5bda](fdd5bda))
* **chain:** use always the raw genesis file ([#2775](#2775)) ([dd2fbc9](dd2fbc9))
* **ci:** update mockery from `2.10` to `2.14` ([#2642](#2642)) ([d2c42b8](d2c42b8))
* **cross-client:** create docker-compose.yml for local devnet  ([#2282](#2282)) ([8abbd87](8abbd87))
* detect chain directory dynamically ([#2292](#2292)) ([85c466c](85c466c))
* **devnet:** add substrate docker images to dockerfile  ([#2263](#2263)) ([b7b2a66](b7b2a66))
* **devnet:** continuous integration `gssmr` devnet on AWS ECS ([#2096](#2096)) ([d096d44](d096d44))
* **docker:** docker-compose.yml to run Gossamer, Prometheus and Grafana ([#2706](#2706)) ([c5dda51](c5dda51))
* **dot/network:** add mismatched genesis peer reporting ([#2265](#2265)) ([a1d7269](a1d7269))
* **dot/state:** `gossamer_storage_tries_cached_total` gauge metric ([#2272](#2272)) ([625cbcf](625cbcf))
* **e2e:** build Gossamer on any test run ([#2608](#2608)) ([f97e0ef](f97e0ef))
* **go:** upgrade Go from 1.17 to 1.18 ([#2379](#2379)) ([d85a1db](d85a1db))
* include nested varying data type on neighbor messages ([#2722](#2722)) ([426569a](426569a))
* **lib/babe:** implement secondary slot block production ([#2260](#2260)) ([fcb81a3](fcb81a3))
* **lib/runtime:** support Substrate WASM compression ([#2213](#2213)) ([fd60061](fd60061))
* **lib/trie:** atomic tracked merkle values ([#2876](#2876)) ([1c4174c](1c4174c))
* **lib/trie:** clear fields when node is dirty ([#2297](#2297)) ([1162828](1162828))
* **lib/trie:** only copy nodes when mutation is certain ([#2352](#2352)) ([86624cf](86624cf))
* **lib/trie:** opportunistic parallel hashing ([#2081](#2081)) ([790dfb5](790dfb5))
* **metrics:** replace metrics port with address (breaking change) ([#2382](#2382)) ([d2ec68d](d2ec68d))
* **pkg/scale:** add `Encoder` with `Encode` method ([#2741](#2741)) ([af5c63f](af5c63f))
* **pkg/scale:** add use of pkg/error Wrap for error handling ([#2708](#2708)) ([08c4281](08c4281))
* **pkg/scale:** encoding and decoding of maps in scale ([#2894](#2894)) ([405db51](405db51)), closes [#2796](#2796)
* **pkg/scale:** support for custom `VaryingDataType` types ([#2612](#2612)) ([914a747](914a747))
* remove uneeded runtime prefix logs ([#2110](#2110)) ([8bd05d1](8bd05d1))
* remove unused code ([#2677](#2677)) ([b3698d7](b3698d7))
* **scale:** add range checks to decodeUint function ([#2683](#2683)) ([ac700f8](ac700f8))
* **trie:** decode all inlined node variants ([#2611](#2611)) ([b09eb07](b09eb07))
* **trie:** export `LoadFromProof` ([#2455](#2455)) ([0b4f33d](0b4f33d))
* **trie:** faster header decoding ([#2649](#2649)) ([d9460e3](d9460e3))
* **trie:** finer deep copy of nodes ([#2384](#2384)) ([bd6d8e4](bd6d8e4))
* **trie:** tracking of number of descendant nodes for each node ([#2378](#2378)) ([dfcdd3c](dfcdd3c))
* **trie:** use scale encoder ([#2930](#2930)) ([e3dc108](e3dc108))
* **wasmer/crypto:** move sig verifier to crypto pkg ([#2057](#2057)) ([dc8bbef](dc8bbef))
* **wasmer:** Add `SetTestVersion` method to `Config` struct ([#2823](#2823)) ([e5c9336](e5c9336))
* **wasmer:** get and cache state version in instance context ([#2747](#2747)) ([3fd63db](3fd63db))
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