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+name = "tokio"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8190d04c665ea9e6b6a0dc45523ade572c088d2e6566244c1122671dbf4ae3a"
+dependencies = [
+ "autocfg",
+ "bytes",
+ "libc",
+ "memchr",
+ "mio",
+ "num_cpus",
+ "once_cell",
+ "parking_lot",
+ "pin-project-lite",
+ "signal-hook-registry",
+ "tokio-macros",
+ "winapi",
+]
+
+[[package]]
+name = "tokio-macros"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "caf7b11a536f46a809a8a9f0bb4237020f70ecbf115b842360afb127ea2fda57"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tokio-native-tls"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7d995660bd2b7f8c1568414c1126076c13fbb725c40112dc0120b78eb9b717b"
+dependencies = [
+ "native-tls",
+ "tokio",
+]
+
+[[package]]
+name = "tokio-stream"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1981ad97df782ab506a1f43bf82c967326960d278acf3bf8279809648c3ff3ea"
+dependencies = [
+ "futures-core",
+ "pin-project-lite",
+ "tokio",
+]
+
+[[package]]
+name = "tokio-util"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebb7cb2f00c5ae8df755b252306272cd1790d39728363936e01827e11f0b017b"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "log",
+ "pin-project-lite",
+ "tokio",
+]
+
+[[package]]
+name = "tower-service"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "360dfd1d6d30e05fda32ace2c8c70e9c0a9da713275777f5a4dbb8a1893930c6"
+
+[[package]]
+name = "tracing"
+version = "0.1.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7d40a22fd029e33300d8d89a5cc8ffce18bb7c587662f54629e94c9de5487f3"
+dependencies = [
+ "cfg-if",
+ "pin-project-lite",
+ "tracing-attributes",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-attributes"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43f080ea7e4107844ef4766459426fa2d5c1ada2e47edba05dc7fa99d9629f47"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f50de3927f93d202783f4513cda820ab47ef17f624b03c096e86ef00c67e6b5f"
+dependencies = [
+ "lazy_static",
+]
+
+[[package]]
+name = "tracing-futures"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97d095ae15e245a057c8e8451bab9b3ee1e1f68e9ba2b4fbc18d0ac5237835f2"
+dependencies = [
+ "pin-project",
+ "tracing",
+]
+
+[[package]]
+name = "tracing-log"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e0f8c7178e13481ff6765bd169b33e8d554c5d2bbede5e32c356194be02b9b9"
+dependencies = [
+ "lazy_static",
+ "log",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-serde"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb65ea441fbb84f9f6748fd496cf7f63ec9af5bca94dd86456978d055e8eb28b"
+dependencies = [
+ "serde",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1fa8f0c8f4c594e4fc9debc1990deab13238077271ba84dd853d54902ee3401"
+dependencies = [
+ "ansi_term",
+ "chrono",
+ "lazy_static",
+ "matchers",
+ "regex",
+ "serde",
+ "serde_json",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
+ "tracing-serde",
+]
+
+[[package]]
+name = "transpose"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "643e21580bb0627c7bb09e5cedbb42c8705b19d012de593ed6b0309270b3cd1e"
+
+[[package]]
+name = "transpose"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3311ef71dea6a1fd6bf5bfc10ec5b4bef6174048f6b481dbc6ce915ff48c0a0"
+dependencies = [
+ "num-integer",
+ "strength_reduce",
+]
+
+[[package]]
+name = "try-lock"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59547bce71d9c38b83d9c0e92b6066c4253371f15005def0c30d9657f50c7642"
+
+[[package]]
+name = "typenum"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "373c8a200f9e67a0c95e62a4f52fbf80c23b4381c05a17845531982fa99e6b33"
+
+[[package]]
+name = "unicode-bidi"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
+dependencies = [
+ "matches",
+]
+
+[[package]]
+name = "unicode-normalization"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07fbfce1c8a97d547e8b5334978438d9d6ec8c20e38f56d4a4374d181493eaef"
+dependencies = [
+ "tinyvec",
+]
+
+[[package]]
+name = "unicode-segmentation"
+version = "1.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb0d2e7be6ae3a5fa87eed5fb451aff96f2573d2694942e40543ae0bbe19c796"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
+
+[[package]]
+name = "unicode_categories"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "39ec24b3121d976906ece63c9daad25b85969647682eee313cb5779fdd69e14e"
+
+[[package]]
+name = "url"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5909f2b0817350449ed73e8bcd81c8c3c8d9a7a5d8acba4b27db277f1868976e"
+dependencies = [
+ "form_urlencoded",
+ "idna",
+ "matches",
+ "percent-encoding",
+]
+
+[[package]]
+name = "vcpkg"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b00bca6106a5e23f3eee943593759b7fcddb00554332e856d990c893966879fb"
+
+[[package]]
+name = "version_check"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
+
+[[package]]
+name = "want"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1ce8a968cb1cd110d136ff8b819a556d6fb6d919363c61534f6860c7eb172ba0"
+dependencies = [
+ "log",
+ "try-lock",
+]
+
+[[package]]
+name = "wasi"
+version = "0.9.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
+
+[[package]]
+name = "wasi"
+version = "0.10.2+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
+
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.70"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55c0f7123de74f0dab9b7d00fd614e7b19349cd1e2f5252bbe9b1754b59433be"
+dependencies = [
+ "cfg-if",
+ "serde",
+ "serde_json",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.70"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7bc45447f0d4573f3d65720f636bbcc3dd6ce920ed704670118650bcd47764c7"
+dependencies = [
+ "bumpalo",
+ "lazy_static",
+ "log",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3de431a2910c86679c34283a33f66f4e4abd7e0aec27b6669060148872aadf94"
+dependencies = [
+ "cfg-if",
+ "js-sys",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.70"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b8853882eef39593ad4174dd26fc9865a64e84026d223f63bb2c42affcbba2c"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.70"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4133b5e7f2a531fa413b3a1695e925038a05a71cf67e87dafa295cb645a01385"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.70"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd4945e4943ae02d15c13962b38a5b1e81eadd4b71214eee75af64a4d6a4fd64"
+
+[[package]]
+name = "web-sys"
+version = "0.3.47"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c40dc691fc48003eba817c38da7113c15698142da971298003cac3ef175680b3"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "weezl"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4a32b378380f4e9869b22f0b5177c68a5519f03b3454fde0b291455ddbae266c"
+
+[[package]]
+name = "whoami"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a921c0ad578a51c0b6c0bbb9b95f0ed11e90d61da506139e48a946edd11ee1e"
+dependencies = [
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "winreg"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0120db82e8a1e0b9fb3345a539c478767c0048d842860994d96113d5b667bd69"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "wyz"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85e60b0d1b5f99db2556934e21937020776a5d31520bf169e851ac44e6420214"
diff --git a/fuzzysearch-ingest-e621/Cargo.toml b/fuzzysearch-ingest-e621/Cargo.toml
new file mode 100644
index 0000000..d780fa1
--- /dev/null
+++ b/fuzzysearch-ingest-e621/Cargo.toml
@@ -0,0 +1,29 @@
+[package]
+name = "e621-watcher"
+version = "0.1.0"
+authors = ["Syfaro <syfaro@huefox.com>"]
+edition = "2018"
+
+[dependencies]
+tokio = { version = "1", features = ["full"] }
+
+hyper = { version = "0.14", features = ["server"] }
+reqwest = { version = "0.11", features = ["json"] }
+
+serde = "1"
+serde_json = "1"
+
+sqlx = { version = "0.5", features = ["runtime-tokio-native-tls", "postgres", "macros", "json", "offline"] }
+
+image = "0.23"
+hamming = "0.1.3"
+img_hash = "3"
+sha2 = "0.9"
+
+tracing = "0.1"
+tracing-subscriber = "0.2"
+
+anyhow = "1"
+
+lazy_static = "1"
+prometheus = { version = "0.11", features = ["process"] }
diff --git a/fuzzysearch-ingest-e621/Dockerfile b/fuzzysearch-ingest-e621/Dockerfile
new file mode 100644
index 0000000..36ee434
--- /dev/null
+++ b/fuzzysearch-ingest-e621/Dockerfile
@@ -0,0 +1,14 @@
+FROM rust:1-slim AS builder
+WORKDIR /src
+ENV SQLX_OFFLINE=true
+RUN apt-get update -y && apt-get install -y libssl-dev pkg-config
+COPY . .
+RUN cargo install --root / --path .
+
+FROM debian:buster-slim
+EXPOSE 8080
+ENV METRICS_HOST=0.0.0.0:8080
+WORKDIR /app
+RUN apt-get update -y && apt-get install -y openssl ca-certificates && rm -rf /var/lib/apt/lists/*
+COPY --from=builder /bin/e621-watcher /bin/e621-watcher
+CMD ["/bin/e621-watcher"]
diff --git a/fuzzysearch-ingest-e621/sqlx-data.json b/fuzzysearch-ingest-e621/sqlx-data.json
new file mode 100644
index 0000000..65c5287
--- /dev/null
+++ b/fuzzysearch-ingest-e621/sqlx-data.json
@@ -0,0 +1,37 @@
+{
+  "db": "PostgreSQL",
+  "02b98e35cf7d650413c2730df732d7ae08119b11a5b2aaddcee08a7f06338924": {
+    "query": "SELECT max(id) max FROM e621",
+    "describe": {
+      "columns": [
+        {
+          "ordinal": 0,
+          "name": "max",
+          "type_info": "Int4"
+        }
+      ],
+      "parameters": {
+        "Left": []
+      },
+      "nullable": [
+        null
+      ]
+    }
+  },
+  "a054594f7844f32e5968a54c0dab59716149a10411fcb16184a9070a82bb287d": {
+    "query": "INSERT INTO e621\n            (id, data, hash, hash_error, sha256) VALUES\n            ($1, $2, $3, $4, $5)\n            ON CONFLICT (id) DO UPDATE SET\n                data = EXCLUDED.data,\n                hash = EXCLUDED.hash,\n                hash_error = EXCLUDED.hash_error,\n                sha256 = EXCLUDED.sha256",
+    "describe": {
+      "columns": [],
+      "parameters": {
+        "Left": [
+          "Int4",
+          "Jsonb",
+          "Int8",
+          "Text",
+          "Bytea"
+        ]
+      },
+      "nullable": []
+    }
+  }
+}
\ No newline at end of file
diff --git a/fuzzysearch-ingest-e621/src/main.rs b/fuzzysearch-ingest-e621/src/main.rs
new file mode 100644
index 0000000..0c93de6
--- /dev/null
+++ b/fuzzysearch-ingest-e621/src/main.rs
@@ -0,0 +1,354 @@
+use anyhow::Context;
+use lazy_static::lazy_static;
+use prometheus::{register_histogram, register_int_gauge, Histogram, IntGauge};
+use sqlx::Connection;
+
+static USER_AGENT: &str = "e621-watcher / FuzzySearch Ingester / Syfaro <syfaro@huefox.com>";
+
+lazy_static! {
+    static ref SUBMISSION_BACKLOG: IntGauge = register_int_gauge!(
+        "fuzzysearch_watcher_e621_submission_backlog",
+        "Number of submissions behind the latest ID"
+    )
+    .unwrap();
+    static ref INDEX_DURATION: Histogram = register_histogram!(
+        "fuzzysearch_watcher_e621_index_duration",
+        "Duration to load an index of submissions"
+    )
+    .unwrap();
+    static ref SUBMISSION_DURATION: Histogram = register_histogram!(
+        "fuzzysearch_watcher_e621_submission_duration",
+        "Duration to ingest a submission"
+    )
+    .unwrap();
+}
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    tracing_subscriber::fmt::init();
+
+    create_metrics_server().await;
+
+    let client = reqwest::ClientBuilder::default()
+        .user_agent(USER_AGENT)
+        .build()?;
+
+    let mut conn = sqlx::PgConnection::connect(&std::env::var("DATABASE_URL")?).await?;
+
+    let max_id: i32 = sqlx::query!("SELECT max(id) max FROM e621")
+        .fetch_one(&mut conn)
+        .await?
+        .max
+        .unwrap_or(0);
+
+    tracing::info!(max_id, "Found maximum ID in database");
+
+    let mut now;
+    let mut min_id = max_id;
+
+    let mut latest_id: Option<i32> = None;
+
+    loop {
+        now = std::time::Instant::now();
+
+        let lid = match latest_id {
+            Some(latest_id) => latest_id,
+            None => {
+                let _hist = INDEX_DURATION.start_timer();
+                let lid = get_latest_id(&client)
+                    .await
+                    .expect("Unable to get latest ID");
+                drop(_hist);
+
+                latest_id = Some(lid);
+
+                lid
+            }
+        };
+
+        let _hist = INDEX_DURATION.start_timer();
+        let page = load_page(&client, min_id).await?;
+        drop(_hist);
+
+        let posts = get_page_posts(&page)?;
+        let post_ids = get_post_ids(&posts);
+
+        tracing::trace!(?post_ids, "Collected posts");
+
+        min_id = match post_ids.iter().max() {
+            Some(id) => *id,
+            None => {
+                tracing::warn!("Found no new posts, sleeping");
+                tokio::time::sleep(std::time::Duration::from_secs(60 * 5)).await;
+                continue;
+            }
+        };
+
+        SUBMISSION_BACKLOG.set((lid - min_id).into());
+
+        let mut tx = conn.begin().await?;
+
+        for post in posts {
+            let _hist = SUBMISSION_DURATION.start_timer();
+            insert_submission(&mut tx, &client, post).await?;
+            drop(_hist);
+
+            SUBMISSION_BACKLOG.sub(1);
+        }
+
+        tx.commit().await?;
+
+        let elapsed = now.elapsed().as_millis() as u64;
+        if post_ids.contains(&lid) {
+            tracing::warn!(lid, "Page contained latest ID, sleeping");
+            tokio::time::sleep(std::time::Duration::from_secs(60 * 5)).await;
+
+            latest_id = None;
+        } else if elapsed < 1000 {
+            let delay = 1000 - elapsed;
+            tracing::warn!(delay, "Delaying before next request");
+            tokio::time::sleep(std::time::Duration::from_millis(delay)).await;
+        }
+    }
+}
+
+fn get_page_posts(page: &serde_json::Value) -> anyhow::Result<&Vec<serde_json::Value>> {
+    let page = match page {
+        serde_json::Value::Object(ref obj) => obj,
+        _ => return Err(anyhow::anyhow!("Top level object was not an object")),
+    };
+
+    let posts = page
+        .get("posts")
+        .context("Page did not contain posts object")?
+        .as_array()
+        .context("Posts was not an array")?;
+
+    Ok(posts)
+}
+
+fn get_post_ids(posts: &[serde_json::Value]) -> Vec<i32> {
+    let ids: Vec<i32> = posts
+        .iter()
+        .filter_map(|post| {
+            let post = match post {
+                serde_json::Value::Object(post) => post,
+                _ => return None,
+            };
+
+            let id = match post.get("id")? {
+                serde_json::Value::Number(num) => num.as_i64()? as i32,
+                _ => return None,
+            };
+
+            Some(id)
+        })
+        .collect();
+
+    ids
+}
+
+#[tracing::instrument(err, skip(client))]
+async fn get_latest_id(client: &reqwest::Client) -> anyhow::Result<i32> {
+    tracing::debug!("Looking up current highest ID");
+
+    let query = vec![("limit", "1")];
+
+    let page: serde_json::Value = client
+        .get("https://e621.net/posts.json")
+        .query(&query)
+        .send()
+        .await?
+        .json()
+        .await?;
+
+    let posts = get_page_posts(&page)?;
+
+    let id = get_post_ids(&posts)
+        .into_iter()
+        .max()
+        .context("Page had no IDs")?;
+
+    tracing::info!(id, "Found maximum ID");
+
+    Ok(id)
+}
+
+#[tracing::instrument(err, skip(client))]
+async fn load_page(client: &reqwest::Client, after_id: i32) -> anyhow::Result<serde_json::Value> {
+    tracing::debug!("Attempting to load page");
+
+    let query = vec![
+        ("limit", "320".to_string()),
+        ("page", format!("a{}", after_id)),
+    ];
+
+    let body = client
+        .get("https://e621.net/posts.json")
+        .query(&query)
+        .send()
+        .await?
+        .json()
+        .await?;
+
+    Ok(body)
+}
+
+type ImageData = (Option<i64>, Option<String>, Option<Vec<u8>>);
+
+#[tracing::instrument(err, skip(conn, client, post), fields(id))]
+async fn insert_submission(
+    conn: &mut sqlx::Transaction<'_, sqlx::Postgres>,
+    client: &reqwest::Client,
+    post: &serde_json::Value,
+) -> anyhow::Result<()> {
+    let id = post
+        .get("id")
+        .context("Post was missing ID")?
+        .as_i64()
+        .context("Post ID was not number")? as i32;
+
+    tracing::Span::current().record("id", &id);
+    tracing::debug!("Inserting submission");
+
+    tracing::trace!(?post, "Evaluating post");
+
+    let (hash, hash_error, sha256): ImageData = if let Some((url, ext)) = get_post_url_ext(&post) {
+        if url != "/images/deleted-preview.png" && (ext == "jpg" || ext == "png") {
+            load_image(&client, &url).await?
+        } else {
+            tracing::debug!("Ignoring post as it is deleted or not a supported image format");
+
+            (None, None, None)
+        }
+    } else {
+        tracing::warn!("Post had missing URL or extension");
+
+        (None, None, None)
+    };
+
+    sqlx::query!(
+        "INSERT INTO e621
+            (id, data, hash, hash_error, sha256) VALUES
+            ($1, $2, $3, $4, $5)
+            ON CONFLICT (id) DO UPDATE SET
+                data = EXCLUDED.data,
+                hash = EXCLUDED.hash,
+                hash_error = EXCLUDED.hash_error,
+                sha256 = EXCLUDED.sha256",
+        id,
+        post,
+        hash,
+        hash_error,
+        sha256
+    )
+    .execute(conn)
+    .await?;
+
+    Ok(())
+}
+
+fn get_post_url_ext(post: &serde_json::Value) -> Option<(&str, &str)> {
+    let file = post.as_object()?.get("file")?.as_object()?;
+
+    let url = file.get("url")?.as_str()?;
+    let ext = file.get("ext")?.as_str()?;
+
+    Some((url, ext))
+}
+
+#[tracing::instrument(err, skip(client))]
+async fn load_image(client: &reqwest::Client, url: &str) -> anyhow::Result<ImageData> {
+    use sha2::{Digest, Sha256};
+    use std::convert::TryInto;
+
+    let bytes = client.get(url).send().await?.bytes().await?;
+
+    tracing::trace!(len = bytes.len(), "Got submission image bytes");
+
+    let mut hasher = Sha256::new();
+    hasher.update(&bytes);
+    let result = hasher.finalize().to_vec();
+
+    tracing::trace!(?result, "Calculated image SHA256");
+
+    let hasher = get_hasher();
+    let img = match image::load_from_memory(&bytes) {
+        Ok(img) => img,
+        Err(err) => {
+            tracing::error!(?err, "Unable to open image");
+            return Ok((None, Some(err.to_string()), Some(result)));
+        }
+    };
+
+    tracing::trace!("Opened image successfully");
+
+    let hash = hasher.hash_image(&img);
+    let hash: [u8; 8] = hash.as_bytes().try_into()?;
+    let hash = i64::from_be_bytes(hash);
+
+    tracing::trace!(?hash, "Calculated image hash");
+
+    Ok((Some(hash), None, Some(result)))
+}
+
+fn get_hasher() -> img_hash::Hasher<[u8; 8]> {
+    img_hash::HasherConfig::with_bytes_type::<[u8; 8]>()
+        .hash_alg(img_hash::HashAlg::Gradient)
+        .hash_size(8, 8)
+        .preproc_dct()
+        .to_hasher()
+}
+
+async fn provide_metrics(
+    _: hyper::Request<hyper::Body>,
+) -> Result<hyper::Response<hyper::Body>, std::convert::Infallible> {
+    use hyper::{Body, Response};
+    use prometheus::{Encoder, TextEncoder};
+
+    let mut buffer = Vec::new();
+    let encoder = TextEncoder::new();
+
+    let metric_families = prometheus::gather();
+    encoder.encode(&metric_families, &mut buffer).unwrap();
+
+    Ok(Response::new(Body::from(buffer)))
+}
+
+async fn create_metrics_server() {
+    use hyper::{
+        service::{make_service_fn, service_fn},
+        Server,
+    };
+    use std::convert::Infallible;
+    use std::net::SocketAddr;
+
+    let make_svc =
+        make_service_fn(|_conn| async { Ok::<_, Infallible>(service_fn(provide_metrics)) });
+
+    let addr: SocketAddr = std::env::var("METRICS_HOST")
+        .expect("Missing METRICS_HOST")
+        .parse()
+        .expect("Invalid METRICS_HOST");
+
+    let server = Server::bind(&addr).serve(make_svc);
+
+    tokio::spawn(async move { server.await.expect("Metrics server error") });
+}
+
+#[cfg(test)]
+mod tests {
+    #[tokio::test]
+    async fn test_get_latest_id() {
+        let client = reqwest::ClientBuilder::new()
+            .user_agent(super::USER_AGENT)
+            .build()
+            .unwrap();
+
+        let latest_id = super::get_latest_id(&client)
+            .await
+            .expect("No error should occur");
+
+        assert!(latest_id > 1_000_000, "Latest ID should be reasonably high");
+    }
+}