{"action":"created","comment":{"url":"https://api.github.com/repos/aeternity/elixir-research/pulls/comments/165446202","pull_request_review_id":93387778,"id":165446202,"diff_hunk":"@@ -7,50 +7,124 @@ defmodule Aecore.Persistence.Worker do\n   use GenServer\n \n   alias Aecore.Chain.BlockValidation\n+  alias Aecore.Keys.Worker, as: Keys\n \n   require Logger\n \n+  @latest_block_key \"latest_block\"\n+\n   def start_link(_args) do\n     GenServer.start_link(__MODULE__, %{}, name: __MODULE__)\n   end\n \n   ## Client side\n \n-  @spec write_block_by_hash(Block.t()) :: :ok | {:error, reason :: term()}\n-  def write_block_by_hash(%{header: header} = block) do\n+  @spec add_block_by_hash(Block.t()) :: :ok | {:error, reason :: term()}\n+  def add_block_by_hash(%{header: header} = block) do\n     hash = BlockValidation.block_header_hash(header)\n-    GenServer.call(__MODULE__, {:write_block_by_hash, {hash, block}})\n+    GenServer.call(__MODULE__, {:add_block_by_hash, {hash, block}})\n+  end\n+  def add_block_by_hash(_block), do: {:error, \"bad block structure\"}\n+\n+  @spec get_block_by_hash(String.t()) ::\n+  {:ok, block :: Block.t()} | :not_found | {:error, reason :: term()}\n+  def get_block_by_hash(hash) when is_binary(hash) do\n+    GenServer.call(__MODULE__, {:get_block_by_hash, hash})\n+  end\n+  def get_block_by_hash(_hash), do: {:error, \"bad hash value\"}\n+\n+  @spec get_all_blocks() ::\n+  {:ok, map()} | :not_found | {:error, reason :: term()}\n+  def get_all_blocks() do\n+    GenServer.call(__MODULE__, :get_all_blocks)\n+  end\n+\n+  @spec get_latest_block_height_and_hash() ::\n+  {:ok, map()} | :not_found | {:error, reason :: term()}\n+  def get_latest_block_height_and_hash() do\n+    GenServer.call(__MODULE__, :get_latest_block_height_and_hash)\n+  end\n+\n+  @spec add_account_chain_state(account :: binary(), chain_state :: map()) ::\n+  :ok | {:error, reason :: term()}\n+  def add_account_chain_state(account, data) do\n+    GenServer.call(__MODULE__, {:add_account_chain_state, {account, data}})\n   end\n-  def write_block_by_hash(_block), do: {:error, \"bad block structure\"}\n \n-  @spec read_block_by_hash(String.t()) ::\n-  {:ok, block :: map()} | :not_found | {:error, reason :: term()}\n-  def read_block_by_hash(hash) when is_binary(hash) do\n-    GenServer.call(__MODULE__, {:read_block_by_hash, hash})\n+  @spec get_account_chain_state(account :: binary()) ::\n+  {:ok, chain_state :: map()} | :not_found | {:error, reason :: term()}\n+  def get_account_chain_state(account) do\n+    GenServer.call(__MODULE__, {:get_account_chain_state, account})\n+  end\n+\n+  @spec get_all_accounts_chain_states() ::\n+  {:ok, chain_state :: map()} | :not_found | {:error, reason :: term()}\n+  def get_all_accounts_chain_states() do\n+    GenServer.call(__MODULE__, :get_all_accounts_chain_states)\n   end\n-  def read_block_by_hash(_hash), do: {:error, \"bad hash value\"}\n \n   ## Server side\n \n   def init(_) do\n-    ## We are creating `blocks_by_hash` family for the blocks\n-    ## https://github.com/facebook/rocksdb/wiki/Column-Families\n-    {:ok, db, %{\"blocks_by_hash\" => blocks_family}} =\n+    ## We are ensuring that families for the blocks and chain state\n+    ## are created. More about them - https://github.com/facebook/rocksdb/wiki/Column-Families\n+    {:ok, db, %{\"blocks_family\"       => blocks_family,\n+                \"latest_block_family\" => latest_block_family,\n+                \"chain_state_family\"  => chain_state_family}} =\n       Rox.open(persistence_path(),\n-        [create_if_missing: true, auto_create_column_families: true], [\"blocks_by_hash\"])\n-    {:ok, %{db: db, blocks_family: blocks_family}}\n+        [create_if_missing: true, auto_create_column_families: true],\n+        [\"blocks_family\", \"latest_block_family\", \"chain_state_family\"])\n+    {:ok, %{db: db,\n+            blocks_family: blocks_family,\n+            latest_block_family: latest_block_family,\n+            chain_state_family: chain_state_family}}\n   end\n \n-  def handle_call({:write_block_by_hash, {hash, block}}, _from,\n-    %{db: _db, blocks_family: blocks_family} = state) do\n-    {:reply, Rox.put(blocks_family, hash, block), state}\n+  def handle_call({:add_block_by_hash, {hash, block}}, _from,\n+    %{db: _db, latest_block_family: latest_block_family,\n+      blocks_family: blocks_family} = state) do\n+    :ok = Rox.put(latest_block_family, @latest_block_key,","path":"apps/aecore/lib/aecore/persistence/worker.ex","position":97,"original_position":97,"commit_id":"959d8351580576b0322d63c5e7d9f647df8e8d78","original_commit_id":"959d8351580576b0322d63c5e7d9f647df8e8d78","user":{"login":"meivantodorov","id":12221083,"avatar_url":"https://avatars2.githubusercontent.com/u/12221083?v=4","gravatar_id":"","url":"https://api.github.com/users/meivantodorov","html_url":"https://github.com/meivantodorov","followers_url":"https://api.github.com/users/meivantodorov/followers","following_url":"https://api.github.com/users/meivantodorov/following{/other_user}","gists_url":"https://api.github.com/users/meivantodorov/gists{/gist_id}","starred_url":"https://api.github.com/users/meivantodorov/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/meivantodorov/subscriptions","organizations_url":"https://api.github.com/users/meivantodorov/orgs","repos_url":"https://api.github.com/users/meivantodorov/repos","events_url":"https://api.github.com/users/meivantodorov/events{/privacy}","received_events_url":"https://api.github.com/users/meivantodorov/received_events","type":"User","site_admin":false},"body":"Thank you, for your comment. I will consider this.","created_at":"2018-02-01T18:29:46Z","updated_at":"2018-02-01T18:29:46Z","html_url":"https://github.com/aeternity/elixir-research/pull/188#discussion_r165446202","pull_request_url":"https://api.github.com/repos/aeternity/elixir-research/pulls/188","author_association":"CONTRIBUTOR","_links":{"self":{"href":"https://api.github.com/repos/aeternity/elixir-research/pulls/comments/165446202"},"html":{"href":"https://github.com/aeternity/elixir-research/pull/188#discussion_r165446202"},"pull_request":{"href":"https://api.github.com/repos/aeternity/elixir-research/pulls/188"}},"in_reply_to_id":165399485},"pull_request":{"url":"https://api.github.com/repos/aeternity/elixir-research/pulls/188","id":162629682,"html_url":"https://github.com/aeternity/elixir-research/pull/188","diff_url":"https://github.com/aeternity/elixir-research/pull/188.diff","patch_url":"https://github.com/aeternity/elixir-research/pull/188.patch","issue_url":"https://api.github.com/repos/aeternity/elixir-research/issues/188","number":188,"state":"open","locked":false,"title":"[GH-#143] Chain state persistence to disk using rocksdb","user":{"login":"meivantodorov","id":12221083,"avatar_url":"https://avatars2.githubusercontent.com/u/12221083?v=4","gravatar_id":"","url":"https://api.github.com/users/meivantodorov","html_url":"https://github.com/meivantodorov","followers_url":"https://api.github.com/users/meivantodorov/followers","following_url":"https://api.github.com/users/meivantodorov/following{/other_user}","gists_url":"https://api.github.com/users/meivantodorov/gists{/gist_id}","starred_url":"https://api.github.com/users/meivantodorov/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/meivantodorov/subscriptions","organizations_url":"https://api.github.com/users/meivantodorov/orgs","repos_url":"https://api.github.com/users/meivantodorov/repos","events_url":"https://api.github.com/users/meivantodorov/events{/privacy}","received_events_url":"https://api.github.com/users/meivantodorov/received_events","type":"User","site_admin":false},"body":"### What this PR does: \r\n- Write to disk each account state on `RockDB`separately in order to write on chunks instead of writing\r\nthe whole chain state every time.\r\n- Write to disk block info in order to get easily `top_hash` and `top_height` on start-up stage.\r\n- Retrieving all blocks as map.\r\n- Retrieving all accounts states as map.\r\n- Loading previous persisted states on start-up.\r\n\r\nCloses #143 \r\n\r\n","created_at":"2018-01-12T13:25:24Z","updated_at":"2018-02-01T18:29:46Z","closed_at":null,"merged_at":null,"merge_commit_sha":"3324081a38b521827f62854da3f7fca1f437fa25","assignee":null,"assignees":[],"requested_reviewers":[{"login":"nedelcho-delchev-tues","id":5245055,"avatar_url":"https://avatars3.githubusercontent.com/u/5245055?v=4","gravatar_id":"","url":"https://api.github.com/users/nedelcho-delchev-tues","html_url":"https://github.com/nedelcho-delchev-tues","followers_url":"https://api.github.com/users/nedelcho-delchev-tues/followers","following_url":"https://api.github.com/users/nedelcho-delchev-tues/following{/other_user}","gists_url":"https://api.github.com/users/nedelcho-delchev-tues/gists{/gist_id}","starred_url":"https://api.github.com/users/nedelcho-delchev-tues/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nedelcho-delchev-tues/subscriptions","organizations_url":"https://api.github.com/users/nedelcho-delchev-tues/orgs","repos_url":"https://api.github.com/users/nedelcho-delchev-tues/repos","events_url":"https://api.github.com/users/nedelcho-delchev-tues/events{/privacy}","received_events_url":"https://api.github.com/users/nedelcho-delchev-tues/received_events","type":"User","site_admin":false},{"login":"d-velev","id":5573915,"avatar_url":"https://avatars1.githubusercontent.com/u/5573915?v=4","gravatar_id":"","url":"https://api.github.com/users/d-velev","html_url":"https://github.com/d-velev","followers_url":"https://api.github.com/users/d-velev/followers","following_url":"https://api.github.com/users/d-velev/following{/other_user}","gists_url":"https://api.github.com/users/d-velev/gists{/gist_id}","starred_url":"https://api.github.com/users/d-velev/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/d-velev/subscriptions","organizations_url":"https://api.github.com/users/d-velev/orgs","repos_url":"https://api.github.com/users/d-velev/repos","events_url":"https://api.github.com/users/d-velev/events{/privacy}","received_events_url":"https://api.github.com/users/d-velev/received_events","type":"User","site_admin":false}],"requested_teams":[],"milestone":null,"commits_url":"https://api.github.com/repos/aeternity/elixir-research/pulls/188/commits","review_comments_url":"https://api.github.com/repos/aeternity/elixir-research/pulls/188/comments","review_comment_url":"https://api.github.com/repos/aeternity/elixir-research/pulls/comments{/number}","comments_url":"https://api.github.com/repos/aeternity/elixir-research/issues/188/comments","statuses_url":"https://api.github.com/repos/aeternity/elixir-research/statuses/959d8351580576b0322d63c5e7d9f647df8e8d78","head":{"label":"aeternity:GH-143","ref":"GH-143","sha":"959d8351580576b0322d63c5e7d9f647df8e8d78","user":{"login":"aeternity","id":21989234,"avatar_url":"https://avatars1.githubusercontent.com/u/21989234?v=4","gravatar_id":"","url":"https://api.github.com/users/aeternity","html_url":"https://github.com/aeternity","followers_url":"https://api.github.com/users/aeternity/followers","following_url":"https://api.github.com/users/aeternity/following{/other_user}","gists_url":"https://api.github.com/users/aeternity/gists{/gist_id}","starred_url":"https://api.github.com/users/aeternity/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/aeternity/subscriptions","organizations_url":"https://api.github.com/users/aeternity/orgs","repos_url":"https://api.github.com/users/aeternity/repos","events_url":"https://api.github.com/users/aeternity/events{/privacy}","received_events_url":"https://api.github.com/users/aeternity/received_events","type":"Organization","site_admin":false},"repo":{"id":102751238,"name":"elixir-research","full_name":"aeternity/elixir-research","owner":{"login":"aeternity","id":21989234,"avatar_url":"https://avatars1.githubusercontent.com/u/21989234?v=4","gravatar_id":"","url":"https://api.github.com/users/aeternity","html_url":"https://github.com/aeternity","followers_url":"https://api.github.com/users/aeternity/followers","following_url":"https://api.github.com/users/aeternity/following{/other_user}","gists_url":"https://api.github.com/users/aeternity/gists{/gist_id}","starred_url":"https://api.github.com/users/aeternity/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/aeternity/subscriptions","organizations_url":"https://api.github.com/users/aeternity/orgs","repos_url":"https://api.github.com/users/aeternity/repos","events_url":"https://api.github.com/users/aeternity/events{/privacy}","received_events_url":"https://api.github.com/users/aeternity/received_events","type":"Organization","site_admin":false},"private":false,"html_url":"https://github.com/aeternity/elixir-research","description":"The 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