From 0a35207dd73662df24d0ae9cb4a761f4be3b44ab Mon Sep 17 00:00:00 2001
From: Mononaut <github@monospace.live>
Date: Mon, 16 May 2022 17:39:51 +0000
Subject: [PATCH] Make rocksdb dependency optional

---
 client/src/components/TxViz.svelte |  2 +-
 server/README.md                   | 25 ++++++++++++++++++++++++-
 server/lib/server.ex               |  2 +-
 server/lib/spend_index.ex          | 12 ++++++------
 server/mix.exs                     |  2 +-
 5 files changed, 33 insertions(+), 10 deletions(-)

diff --git a/client/src/components/TxViz.svelte b/client/src/components/TxViz.svelte
index 636fc45..99b87cc 100644
--- a/client/src/components/TxViz.svelte
+++ b/client/src/components/TxViz.svelte
@@ -575,7 +575,7 @@
   {/if}
 
   {#if $loading}
-    <div class="loading-overlay" in:fade={{ delay: 500, duration: 500 }} out:fade={{ duration: 200 }}>
+    <div class="loading-overlay" in:fade={{ delay: 1000, duration: 500 }} out:fade={{ duration: 200 }}>
       <div class="loading-wrapper">
         <LoadingAnimation />
         <p class="loading-msg">loading</p>
diff --git a/server/README.md b/server/README.md
index 6719bcf..ab9751d 100644
--- a/server/README.md
+++ b/server/README.md
@@ -11,6 +11,30 @@
 
 #### Installation
 
+Set the `MIX_TARGET` environment variable to choose a build target (defaults to "personal")
+
+"personal" - tailored to low traffic personal deployments. resource-intensive features & dependencies disabled
+
+```shell
+export MIX_TARGET=personal
+```
+
+or
+
+"public" - tailored to high traffic, high performance public deployments.
+
+```shell
+export MIX_TARGET=public
+```
+
+✅❌
+
+| feature | "public" | "personal" |
+|---|---|---|
+| Spend index | ✅ | ❌ |
+
+
+
 ```shell
 mix do deps.get
 mix do deps.compile
@@ -27,7 +51,6 @@ The API server expects the following environment variables to be set:
 | LOG_LEVEL | Tailor logging verbosity. either "error", "info" (default) or "debug" |
 | RPC_POOLS | Number of connection pools for RPC requests to Bitcoin Core |
 | RPC_POOL_SIZE | Number of connections maintained per pool (RPC_POOLS x RPC_POOL_SIZE should be substantially lower than `rpcworkqueue` in bitcoin.conf) |
-| INDEXED | 'true' to build indexes required for certain features (see [INDEXES.md](https://github.com/bitfeed-project/block/master/server/INDEXES.md) for details). Omit this variable to disable indexing |
 | BITCOIN_HOST | Bitcoin node host address |
 | BITCOIN_ZMQ_RAWBLOCK_PORT | Bitcoin node ZMQ port for block events (to match `zmqpubrawblock` in bitcoin.conf) |
 | BITCOIN_ZMQ_RAWTX_PORT | Bitcoin node ZMQ port for transaction events (to match `zmqpubrawtx` in bitcoin.conf) |
diff --git a/server/lib/server.ex b/server/lib/server.ex
index 74db95c..e5fc49f 100644
--- a/server/lib/server.ex
+++ b/server/lib/server.ex
@@ -13,7 +13,7 @@ defmodule BitcoinStream.Server do
     { rpc_pool_size, "" } = Integer.parse(System.get_env("RPC_POOL_SIZE") || "16");
     log_level = System.get_env("LOG_LEVEL");
     btc_host = System.get_env("BITCOIN_HOST");
-    indexed = System.get_env("INDEXED")
+    indexed = Mix.target == "public";
 
     case log_level do
       "debug" ->
diff --git a/server/lib/spend_index.ex b/server/lib/spend_index.ex
index 0b49bab..632dd41 100644
--- a/server/lib/spend_index.ex
+++ b/server/lib/spend_index.ex
@@ -17,7 +17,7 @@ defmodule BitcoinStream.Index.Spend do
   @impl true
   def init([indexed]) do
     :ets.new(:spend_cache, [:set, :public, :named_table]);
-    if (indexed != nil) do
+    if (indexed) do
       {:ok, dbref} = :rocksdb.open(String.to_charlist("data/index/spend"), [create_if_missing: true]);
       Process.send_after(self(), :sync, 2000);
       {:ok, [dbref, indexed, false]}
@@ -28,14 +28,14 @@ defmodule BitcoinStream.Index.Spend do
 
   @impl true
   def terminate(_reason, [dbref, indexed, _done]) do
-    if (indexed != nil) do
+    if (indexed) do
       :rocksdb.close(dbref)
     end
   end
 
   @impl true
   def handle_info(:sync, [dbref, indexed, done]) do
-    if (indexed != nil) do
+    if (indexed) do
       case sync(dbref) do
         true ->
           {:noreply, [dbref, indexed, true]}
@@ -57,7 +57,7 @@ defmodule BitcoinStream.Index.Spend do
 
   @impl true
   def handle_call({:get_tx_spends, txid}, _from, [dbref, indexed, done]) do
-    case get_transaction_spends(dbref, txid, (indexed != nil)) do
+    case get_transaction_spends(dbref, txid, (indexed)) do
       {:ok, spends} ->
         {:reply, {:ok, spends}, [dbref, indexed, done]}
 
@@ -69,7 +69,7 @@ defmodule BitcoinStream.Index.Spend do
 
   @impl true
   def handle_cast(:new_block, [dbref, indexed, done]) do
-    if (indexed != nil and done) do
+    if (indexed and done) do
       case sync(dbref) do
         true ->
           {:noreply, [dbref, indexed, true]}
@@ -86,7 +86,7 @@ defmodule BitcoinStream.Index.Spend do
   @impl true
   def handle_cast({:block_disconnected, hash}, [dbref, indexed, done]) do
     Logger.info("block disconnected: #{hash}");
-    if (indexed != nil and done) do
+    if (indexed and done) do
       block_disconnected(dbref, hash)
     end
     {:noreply, [dbref, indexed, done]}
diff --git a/server/mix.exs b/server/mix.exs
index d89f64d..8150563 100644
--- a/server/mix.exs
+++ b/server/mix.exs
@@ -42,7 +42,7 @@ defmodule BitcoinStream.MixProject do
       {:corsica, "~> 1.0"},
       {:plug_cowboy, "~> 2.0"},
       {:jason, "~> 1.1"},
-      {:rocksdb, "~> 1.6"}
+      {:rocksdb, "~> 1.6", targets: :public}
     ]
   end
 end