Add market data backfilling

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>
2023-09-09 17:48:49 +03:00
parent 548a8e42d5
commit e26d2b95e7
72 changed files with 1847 additions and 1044 deletions
--- a/backend/.dockerignore
+++ b/backend/.dockerignore
@@ -12,3 +12,4 @@ target/
 .env*
 Dockerfile
 .dockerignore
+support/
--- a/.sqlx/query-073ee42ebcc5a5dffd34abaf3e1f4ce3a9318721bed46666cd4cd74542bc24ba.json
+++ b/.sqlx/query-073ee42ebcc5a5dffd34abaf3e1f4ce3a9318721bed46666cd4cd74542bc24ba.json
@@ -0,0 +1,71 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "SELECT * FROM bars WHERE asset_symbol = $1 AND timestamp > $2 ORDER BY timestamp ASC",
+  "describe": {
+    "columns": [
+      {
+        "ordinal": 0,
+        "name": "timestamp",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 1,
+        "name": "asset_symbol",
+        "type_info": "Text"
+      },
+      {
+        "ordinal": 2,
+        "name": "open",
+        "type_info": "Float8"
+      },
+      {
+        "ordinal": 3,
+        "name": "high",
+        "type_info": "Float8"
+      },
+      {
+        "ordinal": 4,
+        "name": "low",
+        "type_info": "Float8"
+      },
+      {
+        "ordinal": 5,
+        "name": "close",
+        "type_info": "Float8"
+      },
+      {
+        "ordinal": 6,
+        "name": "volume",
+        "type_info": "Float8"
+      },
+      {
+        "ordinal": 7,
+        "name": "num_trades",
+        "type_info": "Int8"
+      },
+      {
+        "ordinal": 8,
+        "name": "volume_weighted",
+        "type_info": "Float8"
+      }
+    ],
+    "parameters": {
+      "Left": [
+        "Text",
+        "Timestamptz"
+      ]
+    },
+    "nullable": [
+      false,
+      false,
+      true,
+      true,
+      true,
+      true,
+      false,
+      false,
+      false
+    ]
+  },
+  "hash": "073ee42ebcc5a5dffd34abaf3e1f4ce3a9318721bed46666cd4cd74542bc24ba"
+}
--- a/.sqlx/query-08656bb2e5424ab67014cc40c6cdcbf852e3e30364c3ea23269f29a331f807be.json
+++ b/.sqlx/query-08656bb2e5424ab67014cc40c6cdcbf852e3e30364c3ea23269f29a331f807be.json
@@ -0,0 +1,22 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "INSERT INTO bars_filled (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)\n        ON CONFLICT (timestamp, asset_symbol) DO NOTHING",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Left": [
+        "Timestamptz",
+        "Text",
+        "Float8",
+        "Float8",
+        "Float8",
+        "Float8",
+        "Float8",
+        "Int8",
+        "Float8"
+      ]
+    },
+    "nullable": []
+  },
+  "hash": "08656bb2e5424ab67014cc40c6cdcbf852e3e30364c3ea23269f29a331f807be"
+}
--- a/.sqlx/query-26f7ea563429e395d270cfae4993059aa8ddab93e52c95761de2de022af91ad8.json
+++ b/.sqlx/query-26f7ea563429e395d270cfae4993059aa8ddab93e52c95761de2de022af91ad8.json
@@ -0,0 +1,78 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "INSERT INTO bars_filled (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)\n        ON CONFLICT (timestamp, asset_symbol) DO UPDATE SET open = $3, high = $4, low = $5, close = $6, volume = $7, num_trades = $8, volume_weighted = $9\n        RETURNING timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted",
+  "describe": {
+    "columns": [
+      {
+        "ordinal": 0,
+        "name": "timestamp",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 1,
+        "name": "asset_symbol",
+        "type_info": "Text"
+      },
+      {
+        "ordinal": 2,
+        "name": "open",
+        "type_info": "Float8"
+      },
+      {
+        "ordinal": 3,
+        "name": "high",
+        "type_info": "Float8"
+      },
+      {
+        "ordinal": 4,
+        "name": "low",
+        "type_info": "Float8"
+      },
+      {
+        "ordinal": 5,
+        "name": "close",
+        "type_info": "Float8"
+      },
+      {
+        "ordinal": 6,
+        "name": "volume",
+        "type_info": "Float8"
+      },
+      {
+        "ordinal": 7,
+        "name": "num_trades",
+        "type_info": "Int8"
+      },
+      {
+        "ordinal": 8,
+        "name": "volume_weighted",
+        "type_info": "Float8"
+      }
+    ],
+    "parameters": {
+      "Left": [
+        "Timestamptz",
+        "Text",
+        "Float8",
+        "Float8",
+        "Float8",
+        "Float8",
+        "Float8",
+        "Int8",
+        "Float8"
+      ]
+    },
+    "nullable": [
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ]
+  },
+  "hash": "26f7ea563429e395d270cfae4993059aa8ddab93e52c95761de2de022af91ad8"
+}
--- a/backend/.sqlx/query-987795db0b392cb0a44effbd2307eae7f3eaa3147ac5b5e616471ea293cb6469.json
+++ b/backend/.sqlx/query-987795db0b392cb0a44effbd2307eae7f3eaa3147ac5b5e616471ea293cb6469.json
@@ -1,6 +1,6 @@
 {
  "db_name": "PostgreSQL",
-  "query": "INSERT INTO assets (symbol, class, exchange, trading, date_added) VALUES ($1, $2::CLASS, $3::EXCHANGE, $4, $5)\n        RETURNING symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, date_added",
+  "query": "INSERT INTO assets (symbol, class, exchange, trading, timestamp_added, timestamp_first, timestamp_last) VALUES ($1, $2::CLASS, $3::EXCHANGE, $4, $5, $6, $7)\n        RETURNING symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, timestamp_added, timestamp_first, timestamp_last",
  "describe": {
    "columns": [
      {
@@ -51,7 +51,17 @@
      },
      {
        "ordinal": 4,
-        "name": "date_added",
+        "name": "timestamp_added",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 5,
+        "name": "timestamp_first",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 6,
+        "name": "timestamp_last",
        "type_info": "Timestamptz"
      }
    ],
@@ -87,6 +97,8 @@
          }
        },
        "Bool",
+        "Timestamptz",
+        "Timestamptz",
        "Timestamptz"
      ]
    },
@@ -95,8 +107,10 @@
      false,
      false,
      false,
+      false,
+      false,
      false
    ]
  },
-  "hash": "987795db0b392cb0a44effbd2307eae7f3eaa3147ac5b5e616471ea293cb6469"
+  "hash": "503ed46c4f7f8bb7d418a101ed80712731ae3449ac49d1f278ca4a4b8a2c9497"
 }
--- a/backend/.sqlx/query-b940befc2fbef48069c41f18485a2b6b3e523ee3106af735235701a5a151a29f.json
+++ b/backend/.sqlx/query-b940befc2fbef48069c41f18485a2b6b3e523ee3106af735235701a5a151a29f.json
@@ -1,6 +1,6 @@
 {
  "db_name": "PostgreSQL",
-  "query": "INSERT INTO bars (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted)\n        SELECT * FROM UNNEST($1::timestamptz[], $2::text[], $3::float8[], $4::float8[], $5::float8[], $6::float8[], $7::float8[], $8::int8[], $9::float8[])\n        RETURNING timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted",
+  "query": "SELECT * FROM bars_filled WHERE timestamp < $1 AND asset_symbol = $2 ORDER BY timestamp DESC LIMIT 1",
  "describe": {
    "columns": [
      {
@@ -51,15 +51,8 @@
    ],
    "parameters": {
      "Left": [
-        "TimestamptzArray",
-        "TextArray",
-        "Float8Array",
-        "Float8Array",
-        "Float8Array",
-        "Float8Array",
-        "Float8Array",
-        "Int8Array",
-        "Float8Array"
+        "Timestamptz",
+        "Text"
      ]
    },
    "nullable": [
@@ -74,5 +67,5 @@
      false
    ]
  },
-  "hash": "b940befc2fbef48069c41f18485a2b6b3e523ee3106af735235701a5a151a29f"
+  "hash": "615dcbdc8f624ee990566b21f61b495fb273194a8278435cf4ed84028a55dbc0"
 }
--- a/backend/.sqlx/query-515943b639b1a5cf24a9bbc1274aa36045ebe6a2d19d925bc490f606ff01b440.json
+++ b/backend/.sqlx/query-515943b639b1a5cf24a9bbc1274aa36045ebe6a2d19d925bc490f606ff01b440.json
@@ -1,6 +1,6 @@
 {
  "db_name": "PostgreSQL",
-  "query": "DELETE FROM assets WHERE symbol = $1\n        RETURNING symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, date_added",
+  "query": "DELETE FROM assets WHERE symbol = $1\n        RETURNING symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, timestamp_added, timestamp_first, timestamp_last",
  "describe": {
    "columns": [
      {
@@ -51,7 +51,17 @@
      },
      {
        "ordinal": 4,
-        "name": "date_added",
+        "name": "timestamp_added",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 5,
+        "name": "timestamp_first",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 6,
+        "name": "timestamp_last",
        "type_info": "Timestamptz"
      }
    ],
@@ -65,8 +75,10 @@
      false,
      false,
      false,
+      false,
+      false,
      false
    ]
  },
-  "hash": "515943b639b1a5cf24a9bbc1274aa36045ebe6a2d19d925bc490f606ff01b440"
+  "hash": "742fef7dab68fe792675866c57394b9515cedf85d4b7432142a859638772aaf7"
 }
--- a/backend/.sqlx/query-2fdf66c1563d95b36a3f23783cf6106a243e8433e9844359b0dfd77ba5f892fa.json
+++ b/backend/.sqlx/query-2fdf66c1563d95b36a3f23783cf6106a243e8433e9844359b0dfd77ba5f892fa.json
@@ -1,6 +1,6 @@
 {
  "db_name": "PostgreSQL",
-  "query": "SELECT symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, date_added FROM assets WHERE symbol = $1",
+  "query": "SELECT symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, timestamp_added, timestamp_first, timestamp_last FROM assets WHERE symbol = $1",
  "describe": {
    "columns": [
      {
@@ -51,7 +51,17 @@
      },
      {
        "ordinal": 4,
-        "name": "date_added",
+        "name": "timestamp_added",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 5,
+        "name": "timestamp_first",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 6,
+        "name": "timestamp_last",
        "type_info": "Timestamptz"
      }
    ],
@@ -65,8 +75,10 @@
      false,
      false,
      false,
+      false,
+      false,
      false
    ]
  },
-  "hash": "2fdf66c1563d95b36a3f23783cf6106a243e8433e9844359b0dfd77ba5f892fa"
+  "hash": "7adf5172b6a3c8641f2a9fee848715642e95b6d0a2982792c6ee6853d33c6c5a"
 }
--- a/backend/.sqlx/query-cc23c11a827e26e7c68a35c7ae5044071e3750f6d9ddee8cdc2e29f3f207e2f2.json
+++ b/backend/.sqlx/query-cc23c11a827e26e7c68a35c7ae5044071e3750f6d9ddee8cdc2e29f3f207e2f2.json
@@ -1,6 +1,6 @@
 {
  "db_name": "PostgreSQL",
-  "query": "UPDATE assets SET trading = $1 WHERE symbol = $2\n        RETURNING symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, date_added",
+  "query": "UPDATE assets SET trading = $1 WHERE symbol = $2\n        RETURNING symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, timestamp_added, timestamp_first, timestamp_last",
  "describe": {
    "columns": [
      {
@@ -51,7 +51,17 @@
      },
      {
        "ordinal": 4,
-        "name": "date_added",
+        "name": "timestamp_added",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 5,
+        "name": "timestamp_first",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 6,
+        "name": "timestamp_last",
        "type_info": "Timestamptz"
      }
    ],
@@ -66,8 +76,10 @@
      false,
      false,
      false,
+      false,
+      false,
      false
    ]
  },
-  "hash": "cc23c11a827e26e7c68a35c7ae5044071e3750f6d9ddee8cdc2e29f3f207e2f2"
+  "hash": "8e8173b6e769fe9299a33a6e62a1554ca40f35d2c87f3acf67c0d284c693cc8b"
 }
--- a/backend/.sqlx/query-d1e9b79a4bb2651b4dde42770576a2776f5881039c8f17c04747770a5bf97214.json
+++ b/backend/.sqlx/query-d1e9b79a4bb2651b4dde42770576a2776f5881039c8f17c04747770a5bf97214.json
@@ -1,6 +1,6 @@
 {
  "db_name": "PostgreSQL",
-  "query": "SELECT symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, date_added FROM assets WHERE class = $1::CLASS",
+  "query": "SELECT symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, timestamp_added, timestamp_first, timestamp_last FROM assets WHERE class = $1::CLASS",
  "describe": {
    "columns": [
      {
@@ -51,7 +51,17 @@
      },
      {
        "ordinal": 4,
-        "name": "date_added",
+        "name": "timestamp_added",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 5,
+        "name": "timestamp_first",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 6,
+        "name": "timestamp_last",
        "type_info": "Timestamptz"
      }
    ],
@@ -75,8 +85,10 @@
      false,
      false,
      false,
+      false,
+      false,
      false
    ]
  },
-  "hash": "d1e9b79a4bb2651b4dde42770576a2776f5881039c8f17c04747770a5bf97214"
+  "hash": "9d1121766d12528f51b3352d2fe857e73ae69df9152ece55a8569698a5b13f8b"
 }
--- a/backend/.sqlx/query-48ceef0501f26b4ce3232791b0764f20fa74d7e5f8c67305cfe5cff41ba6527f.json
+++ b/backend/.sqlx/query-48ceef0501f26b4ce3232791b0764f20fa74d7e5f8c67305cfe5cff41ba6527f.json
@@ -1,6 +1,6 @@
 {
  "db_name": "PostgreSQL",
-  "query": "SELECT symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, date_added FROM assets",
+  "query": "SELECT symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, timestamp_added, timestamp_first, timestamp_last FROM assets",
  "describe": {
    "columns": [
      {
@@ -51,7 +51,17 @@
      },
      {
        "ordinal": 4,
-        "name": "date_added",
+        "name": "timestamp_added",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 5,
+        "name": "timestamp_first",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 6,
+        "name": "timestamp_last",
        "type_info": "Timestamptz"
      }
    ],
@@ -63,8 +73,10 @@
      false,
      false,
      false,
+      false,
+      false,
      false
    ]
  },
-  "hash": "48ceef0501f26b4ce3232791b0764f20fa74d7e5f8c67305cfe5cff41ba6527f"
+  "hash": "cb8a317dff39b7624abc7e78d6a8a16634fe25ac2d8ef86084fe5b554e7ce832"
 }
--- a/.sqlx/query-e594f833a1e3435039c6e28e2c6b163c3beb6709fbefd8039b9b82f343d5a6c2.json
+++ b/.sqlx/query-e594f833a1e3435039c6e28e2c6b163c3beb6709fbefd8039b9b82f343d5a6c2.json
@@ -0,0 +1,22 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "INSERT INTO bars (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)\n        ON CONFLICT (timestamp, asset_symbol) DO NOTHING",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Left": [
+        "Timestamptz",
+        "Text",
+        "Float8",
+        "Float8",
+        "Float8",
+        "Float8",
+        "Float8",
+        "Int8",
+        "Float8"
+      ]
+    },
+    "nullable": []
+  },
+  "hash": "e594f833a1e3435039c6e28e2c6b163c3beb6709fbefd8039b9b82f343d5a6c2"
+}
--- a/.sqlx/query-e7d8b69f3f4eede80c1ce1451e301ac5ca7ccfc1414fc39b28f66beff87e328e.json
+++ b/.sqlx/query-e7d8b69f3f4eede80c1ce1451e301ac5ca7ccfc1414fc39b28f66beff87e328e.json
@@ -0,0 +1,85 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "UPDATE assets SET timestamp_last = $1 WHERE symbol = $2\n        RETURNING symbol, class as \"class: Class\", exchange as \"exchange: Exchange\", trading, timestamp_added, timestamp_first, timestamp_last",
+  "describe": {
+    "columns": [
+      {
+        "ordinal": 0,
+        "name": "symbol",
+        "type_info": "Text"
+      },
+      {
+        "ordinal": 1,
+        "name": "class: Class",
+        "type_info": {
+          "Custom": {
+            "name": "class",
+            "kind": {
+              "Enum": [
+                "us_equity",
+                "crypto"
+              ]
+            }
+          }
+        }
+      },
+      {
+        "ordinal": 2,
+        "name": "exchange: Exchange",
+        "type_info": {
+          "Custom": {
+            "name": "exchange",
+            "kind": {
+              "Enum": [
+                "AMEX",
+                "ARCA",
+                "BATS",
+                "NASDAQ",
+                "NYSE",
+                "NYSEARCA",
+                "OTC",
+                "CRYPTO"
+              ]
+            }
+          }
+        }
+      },
+      {
+        "ordinal": 3,
+        "name": "trading",
+        "type_info": "Bool"
+      },
+      {
+        "ordinal": 4,
+        "name": "timestamp_added",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 5,
+        "name": "timestamp_first",
+        "type_info": "Timestamptz"
+      },
+      {
+        "ordinal": 6,
+        "name": "timestamp_last",
+        "type_info": "Timestamptz"
+      }
+    ],
+    "parameters": {
+      "Left": [
+        "Timestamptz",
+        "Text"
+      ]
+    },
+    "nullable": [
+      false,
+      false,
+      false,
+      false,
+      false,
+      false,
+      false
+    ]
+  },
+  "hash": "e7d8b69f3f4eede80c1ce1451e301ac5ca7ccfc1414fc39b28f66beff87e328e"
+}
--- a/backend/.sqlx/query-ece42c3a72569b95f1b0d77faffe71bf99e5d92a7ee1e5c13090706afde9147c.json
+++ b/backend/.sqlx/query-ece42c3a72569b95f1b0d77faffe71bf99e5d92a7ee1e5c13090706afde9147c.json
@@ -65,10 +65,10 @@
    "nullable": [
      false,
      false,
-      false,
-      false,
-      false,
-      false,
+      true,
+      true,
+      true,
+      true,
      false,
      false,
      false
--- a/backend/Cargo.lock
+++ b/backend/Cargo.lock
@@ -70,7 +70,7 @@ checksum = "bc00ceb34980c03614e35a3a4e218276a0a824e911d07651cd0d858a51e8c0f0"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]

 [[package]]
@@ -137,26 +137,6 @@ dependencies = [
 "tower-service",
 ]

-[[package]]
-name = "backend"
-version = "0.1.0"
-dependencies = [
- "axum",
- "dotenv",
- "futures-util",
- "governor",
- "http",
- "log",
- "log4rs",
- "reqwest",
- "serde",
- "serde_json",
- "sqlx",
- "time 0.3.28",
- "tokio",
- "tokio-tungstenite",
-]
-
 [[package]]
 name = "backtrace"
 version = "0.3.69"
@@ -222,9 +202,9 @@ checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"

 [[package]]
 name = "bytes"
-version = "1.4.0"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be"
+checksum = "a2bd12c1caf447e69cd4528f47f94d203fd2582878ecb9e9465484c4148a8223"

 [[package]]
 name = "cc"
@@ -243,15 +223,14 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"

 [[package]]
 name = "chrono"
-version = "0.4.28"
+version = "0.4.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95ed24df0632f708f5f6d8082675bef2596f7084dee3dd55f632290bf35bfe0f"
+checksum = "defd4e7873dbddba6c7c91e199c7fcb946abc4a6a4ac3195400bcfb01b5de877"
 dependencies = [
 "android-tzdata",
 "iana-time-zone",
 "js-sys",
 "num-traits",
- "time 0.1.45",
 "wasm-bindgen",
 "windows-targets",
 ]
@@ -479,6 +458,12 @@ version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6999dc1837253364c2ebb0704ba97994bd874e8f195d665c50b7548f6ea92764"

+[[package]]
+name = "finl_unicode"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8fcfdc7a0362c9f4444381a9e697c79d435fe65b52a37466fc2c1184cee9edc6"
+
 [[package]]
 name = "flume"
 version = "0.10.14"
@@ -588,7 +573,7 @@ checksum = "89ca545a94061b6365f2c7355b4b32bd20df3ff95f02da9329b34ccc3bd6ee72"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]

 [[package]]
@@ -645,7 +630,7 @@ checksum = "be4136b2a15dd319360be1c07d9933517ccf0be8f16bf62a3bee4f0d618df427"
 dependencies = [
 "cfg-if",
 "libc",
- "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasi",
 ]

 [[package]]
@@ -902,9 +887,9 @@ checksum = "28b29a3cd74f0f4598934efe3aeba42bae0eb4680554128851ebbecb02af14e6"

 [[package]]
 name = "itertools"
-version = "0.10.5"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
+checksum = "b1c173a5686ce8bfa551b3563d0c2170bf24ca44da99c7ca4bfdab5418c3fe57"
 dependencies = [
 "either",
 ]
@@ -1045,9 +1030,9 @@ dependencies = [

 [[package]]
 name = "memchr"
-version = "2.6.2"
+version = "2.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5486aed0026218e61b8a01d5fbd5a0a134649abb71a0e53b7bc088529dced86e"
+checksum = "8f232d6ef707e1956a43342693d2a31e72989554d58299d7a88738cc95b0d35c"

 [[package]]
 name = "mime"
@@ -1077,7 +1062,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "927a765cd3fc26206e66b296465fa9d3e5ab003e651c1b3c060e7956d96b19d2"
 dependencies = [
 "libc",
- "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasi",
 "windows-sys",
 ]

@@ -1181,9 +1166,9 @@ dependencies = [

 [[package]]
 name = "object"
-version = "0.32.0"
+version = "0.32.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77ac5bbd07aea88c60a577a1ce218075ffd59208b2d7ca97adf9bfc5aeb21ebe"
+checksum = "9cf5f9dd3933bd50a9e1f149ec995f39ae2c496d31fd772c1fd45ebc27e902b0"
 dependencies = [
 "memchr",
 ]
@@ -1217,7 +1202,7 @@ checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]

 [[package]]
@@ -1228,9 +1213,9 @@ checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"

 [[package]]
 name = "openssl-sys"
-version = "0.9.92"
+version = "0.9.93"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db7e971c2c2bba161b2d2fdf37080177eff520b3bc044787c7f1f5f9e78d869b"
+checksum = "db4d56a4c0478783083cfafcc42493dd4a981d41669da64b4572a2a089b51b1d"
 dependencies = [
 "cc",
 "libc",
@@ -1308,7 +1293,7 @@ checksum = "4359fd9c9171ec6e8c62926d6faaf553a8dc3f64e1507e76da7911b4f6a04405"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]

 [[package]]
@@ -1365,6 +1350,27 @@ dependencies = [
 "unicode-ident",
 ]

+[[package]]
+name = "qrust"
+version = "0.1.0"
+dependencies = [
+ "axum",
+ "dotenv",
+ "futures-util",
+ "governor",
+ "http",
+ "indexmap 2.0.0",
+ "log",
+ "log4rs",
+ "reqwest",
+ "serde",
+ "serde_json",
+ "sqlx",
+ "time",
+ "tokio",
+ "tokio-tungstenite",
+]
+
 [[package]]
 name = "quanta"
 version = "0.11.1"
@@ -1376,7 +1382,7 @@ dependencies = [
 "mach2",
 "once_cell",
 "raw-cpuid",
- "wasi 0.11.0+wasi-snapshot-preview1",
+ "wasi",
 "web-sys",
 "winapi",
 ]
@@ -1514,9 +1520,9 @@ checksum = "d626bb9dae77e28219937af045c257c28bfd3f69333c512553507f5f9798cb76"

 [[package]]
 name = "rustix"
-version = "0.38.10"
+version = "0.38.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed6248e1caa625eb708e266e06159f135e8c26f2bb7ceb72dc4b2766d0340964"
+checksum = "c0c3dde1fc030af041adc40e79c0e7fbcf431dd24870053d187d7c66e4b87453"
 dependencies = [
 "bitflags 2.4.0",
 "errno",
@@ -1602,7 +1608,7 @@ checksum = "4eca7ac642d82aa35b60049a6eccb4be6be75e599bd2e9adb5f875a737654af2"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]

 [[package]]
@@ -1744,9 +1750,9 @@ dependencies = [

 [[package]]
 name = "sqlformat"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c12bc9199d1db8234678b7051747c07f517cdcf019262d1847b94ec8b1aee3e"
+checksum = "6b7b278788e7be4d0d29c0f39497a0eef3fba6bbc8e70d8bf7fde46edeaa9e85"
 dependencies = [
 "itertools",
 "nom",
@@ -1800,7 +1806,7 @@ dependencies = [
 "smallvec",
 "sqlformat",
 "thiserror",
- "time 0.3.28",
+ "time",
 "tokio",
 "tokio-stream",
 "tracing",
@@ -1885,7 +1891,7 @@ dependencies = [
 "sqlx-core",
 "stringprep",
 "thiserror",
- "time 0.3.28",
+ "time",
 "tracing",
 "uuid",
 "whoami",
@@ -1926,7 +1932,7 @@ dependencies = [
 "sqlx-core",
 "stringprep",
 "thiserror",
- "time 0.3.28",
+ "time",
 "tracing",
 "uuid",
 "whoami",
@@ -1950,7 +1956,7 @@ dependencies = [
 "percent-encoding",
 "serde",
 "sqlx-core",
- "time 0.3.28",
+ "time",
 "tracing",
 "url",
 "uuid",
@@ -1958,10 +1964,11 @@ dependencies = [

 [[package]]
 name = "stringprep"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db3737bde7edce97102e0e2b15365bf7a20bfdb5f60f4f9e8d7004258a51a8da"
+checksum = "bb41d74e231a107a1b4ee36bd1214b11285b77768d2e3824aedafa988fd36ee6"
 dependencies = [
+ "finl_unicode",
 "unicode-bidi",
 "unicode-normalization",
 ]
@@ -1985,9 +1992,9 @@ dependencies = [

 [[package]]
 name = "syn"
-version = "2.0.29"
+version = "2.0.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c324c494eba9d92503e6f1ef2e6df781e78f6a7705a0202d9801b198807d518a"
+checksum = "718fa2415bcb8d8bd775917a1bf12a7931b6dfa890753378538118181e0cb398"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -2015,22 +2022,22 @@ dependencies = [

 [[package]]
 name = "thiserror"
-version = "1.0.47"
+version = "1.0.48"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97a802ec30afc17eee47b2855fc72e0c4cd62be9b4efe6591edde0ec5bd68d8f"
+checksum = "9d6d7a740b8a666a7e828dd00da9c0dc290dff53154ea77ac109281de90589b7"
 dependencies = [
 "thiserror-impl",
 ]

 [[package]]
 name = "thiserror-impl"
-version = "1.0.47"
+version = "1.0.48"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6bb623b56e39ab7dcd4b1b98bb6c8f8d907ed255b18de254088016b27a8ee19b"
+checksum = "49922ecae66cc8a249b77e68d1d0623c1b2c514f0060c27cdc68bd62a1219d35"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]

 [[package]]
@@ -2044,17 +2051,6 @@ dependencies = [
 "winapi",
 ]

-[[package]]
-name = "time"
-version = "0.1.45"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b797afad3f312d1c66a56d11d0316f916356d11bd158fbc6ca6389ff6bf805a"
-dependencies = [
- "libc",
- "wasi 0.10.0+wasi-snapshot-preview1",
- "winapi",
-]
-
 [[package]]
 name = "time"
 version = "0.3.28"
@@ -2123,7 +2119,7 @@ checksum = "630bdcf245f78637c13ec01ffae6187cca34625e8c63150d424b59e55af2675e"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]

 [[package]]
@@ -2224,7 +2220,7 @@ checksum = "5f4f31f56159e98206da9efd823404b79b6ef3143b4a7ab76e67b1751b25a4ab"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 ]

 [[package]]
@@ -2363,12 +2359,6 @@ dependencies = [
 "try-lock",
 ]

-[[package]]
-name = "wasi"
-version = "0.10.0+wasi-snapshot-preview1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
-
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
@@ -2396,7 +2386,7 @@ dependencies = [
 "once_cell",
 "proc-macro2",
 "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 "wasm-bindgen-shared",
 ]

@@ -2430,7 +2420,7 @@ checksum = "54681b18a46765f095758388f2d0cf16eb8d4169b639ab575a8f5693af210c7b"
 dependencies = [
 "proc-macro2",
 "quote",
- "syn 2.0.29",
+ "syn 2.0.31",
 "wasm-bindgen-backend",
 "wasm-bindgen-shared",
 ]
--- a/backend/Cargo.toml
+++ b/backend/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-name    = "backend"
+name    = "qrust"
 version = "0.1.0"
 edition = "2021"

@@ -42,3 +42,4 @@ tokio-tungstenite = { version = "0.20.0", features = [
 ] }
 http = "0.2.9"
 governor = "0.6.0"
+indexmap = "2.0.0"
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -13,11 +13,11 @@ RUN rm -rf src
 COPY . .
 RUN cargo build --release

-FROM alpine AS backend
+FROM alpine AS qrust

 WORKDIR /usr/src/qrust

-COPY --from=builder /usr/src/qrust/target/release/backend .
+COPY --from=builder /usr/src/qrust/target/release/qrust .
 COPY log4rs.yaml .

 EXPOSE 7878
--- a/backend/.sqlx/query-8d268f6532ab7fbad0b31286d3c2e0981687c4e0ff48ccc538cf06b3bd616c60.json
+++ b/backend/.sqlx/query-8d268f6532ab7fbad0b31286d3c2e0981687c4e0ff48ccc538cf06b3bd616c60.json
@@ -1,36 +0,0 @@
-{
-  "db_name": "PostgreSQL",
-  "query": "INSERT INTO calendar (date, open, close)\n        SELECT * FROM UNNEST($1::date[], $2::time[], $3::time[])\n        RETURNING date, open, close",
-  "describe": {
-    "columns": [
-      {
-        "ordinal": 0,
-        "name": "date",
-        "type_info": "Date"
-      },
-      {
-        "ordinal": 1,
-        "name": "open",
-        "type_info": "Time"
-      },
-      {
-        "ordinal": 2,
-        "name": "close",
-        "type_info": "Time"
-      }
-    ],
-    "parameters": {
-      "Left": [
-        "DateArray",
-        "TimeArray",
-        "TimeArray"
-      ]
-    },
-    "nullable": [
-      false,
-      false,
-      false
-    ]
-  },
-  "hash": "8d268f6532ab7fbad0b31286d3c2e0981687c4e0ff48ccc538cf06b3bd616c60"
-}
--- a/backend/.sqlx/query-b3fbaff539723326ac5599b9ef25ded2148c9e46409975b7bf0b76f7ba0552e8.json
+++ b/backend/.sqlx/query-b3fbaff539723326ac5599b9ef25ded2148c9e46409975b7bf0b76f7ba0552e8.json
@@ -1,32 +0,0 @@
-{
-  "db_name": "PostgreSQL",
-  "query": "DELETE FROM calendar RETURNING date, open, close",
-  "describe": {
-    "columns": [
-      {
-        "ordinal": 0,
-        "name": "date",
-        "type_info": "Date"
-      },
-      {
-        "ordinal": 1,
-        "name": "open",
-        "type_info": "Time"
-      },
-      {
-        "ordinal": 2,
-        "name": "close",
-        "type_info": "Time"
-      }
-    ],
-    "parameters": {
-      "Left": []
-    },
-    "nullable": [
-      false,
-      false,
-      false
-    ]
-  },
-  "hash": "b3fbaff539723326ac5599b9ef25ded2148c9e46409975b7bf0b76f7ba0552e8"
-}
--- a/backend/docker-compose.yml
+++ b/backend/docker-compose.yml
@@ -1,9 +0,0 @@
-services:
-  backend:
-    build:
-      context: .
-      dockerfile: Dockerfile
-    hostname: backend
-    restart: unless-stopped
-    ports:
-      - 7878:7878
--- a/backend/src/config.rs
+++ b/backend/src/config.rs
@@ -1,45 +0,0 @@
-use governor::{DefaultDirectRateLimiter, Quota, RateLimiter};
-use http::HeaderMap;
-use reqwest::Client;
-use sqlx::{postgres::PgPoolOptions, PgPool};
-use std::{env, sync::Arc};
-
-pub struct AppConfig {
-    pub alpaca_api_key: String,
-    pub alpaca_api_secret: String,
-    pub alpaca_client: Client,
-    pub alpaca_rate_limit: DefaultDirectRateLimiter,
-    pub postgres_pool: PgPool,
-}
-
-const NUM_CLIENTS: usize = 10;
-
-impl AppConfig {
-    pub async fn from_env() -> Result<Self, Box<dyn std::error::Error>> {
-        let alpaca_api_key = env::var("ALPACA_API_KEY")?;
-        let alpaca_api_secret = env::var("ALPACA_API_SECRET")?;
-        let alpaca_rate_limit = env::var("ALPACA_RATE_LIMIT")?;
-
-        Ok(AppConfig {
-            alpaca_api_key: alpaca_api_key.clone(),
-            alpaca_api_secret: alpaca_api_secret.clone(),
-            alpaca_client: Client::builder()
-                .default_headers({
-                    let mut headers = HeaderMap::new();
-                    headers.insert("APCA-API-KEY-ID", alpaca_api_key.parse()?);
-                    headers.insert("APCA-API-SECRET-KEY", alpaca_api_secret.parse()?);
-                    headers
-                })
-                .build()?,
-            alpaca_rate_limit: RateLimiter::direct(Quota::per_minute(alpaca_rate_limit.parse()?)),
-            postgres_pool: PgPoolOptions::new()
-                .max_connections(NUM_CLIENTS as u32)
-                .connect(&env::var("DATABASE_URL")?)
-                .await?,
-        })
-    }
-
-    pub async fn arc_from_env() -> Result<Arc<Self>, Box<dyn std::error::Error>> {
-        Ok(Arc::new(AppConfig::from_env().await?))
-    }
-}
--- a/backend/src/data/calendar.rs
+++ b/backend/src/data/calendar.rs
@@ -1,41 +0,0 @@
-use crate::{
-    config::AppConfig,
-    database,
-    types::{api, CalendarDate},
-};
-use log::info;
-use std::{error::Error, sync::Arc, time::Duration};
-use tokio::time::interval;
-
-const ALPACA_CALENDAR_API_URL: &str = "https://api.alpaca.markets/v2/calendar";
-const REFRESH_INTERVAL: Duration = Duration::from_secs(60 * 60 * 3);
-const EARLIEST_DATE: &str = "1970-01-01";
-const LATEST_DATE: &str = "2029-12-31";
-
-pub async fn run(app_config: Arc<AppConfig>) -> Result<(), Box<dyn Error + Send + Sync>> {
-    let mut interval = interval(REFRESH_INTERVAL);
-
-    loop {
-        interval.tick().await;
-
-        info!("Refreshing calendar...");
-
-        app_config.alpaca_rate_limit.until_ready().await;
-        let calendar_dates = app_config
-            .alpaca_client
-            .get(ALPACA_CALENDAR_API_URL)
-            .query(&[("start", EARLIEST_DATE), ("end", LATEST_DATE)])
-            .send()
-            .await?
-            .json::<Vec<api::incoming::CalendarDate>>()
-            .await?
-            .iter()
-            .map(CalendarDate::from)
-            .collect::<Vec<CalendarDate>>();
-
-        database::calendar::reset_calendar_dates(&app_config.postgres_pool, &calendar_dates)
-            .await?;
-
-        info!("Refreshed calendar.");
-    }
-}
--- a/backend/src/data/live.rs
+++ b/backend/src/data/live.rs
@@ -1,163 +0,0 @@
-use crate::{
-    config::AppConfig,
-    database::{assets::get_assets_with_class, bars::add_bar},
-    types::{
-        websocket::{
-            incoming::{IncomingMessage, SuccessMessage, SuccessMessageType},
-            outgoing::{AuthMessage, OutgoingMessage, SubscribeMessage},
-        },
-        AssetBroadcastMessage, Bar, Class,
-    },
-};
-use core::panic;
-use futures_util::{
-    stream::{SplitSink, SplitStream},
-    SinkExt, StreamExt,
-};
-use log::{debug, error, info, warn};
-use serde_json::{from_str, to_string};
-use std::{error::Error, sync::Arc};
-use tokio::{
-    net::TcpStream,
-    spawn,
-    sync::{broadcast::Receiver, RwLock},
-};
-use tokio_tungstenite::{connect_async, tungstenite::Message, MaybeTlsStream, WebSocketStream};
-
-const ALPACA_STOCK_WEBSOCKET_URL: &str = "wss://stream.data.alpaca.markets/v2/iex";
-const ALPACA_CRYPTO_WEBSOCKET_URL: &str = "wss://stream.data.alpaca.markets/v1beta3/crypto/us";
-
-pub async fn run(
-    class: Class,
-    app_config: Arc<AppConfig>,
-    asset_broadcast_receiver: Receiver<AssetBroadcastMessage>,
-) -> Result<(), Box<dyn Error + Send + Sync>> {
-    let websocket_url = match class {
-        Class::UsEquity => ALPACA_STOCK_WEBSOCKET_URL,
-        Class::Crypto => ALPACA_CRYPTO_WEBSOCKET_URL,
-    };
-
-    let (stream, _) = connect_async(websocket_url).await?;
-    let (mut sink, mut stream) = stream.split();
-
-    match stream.next().await {
-        Some(Ok(Message::Text(data)))
-            if from_str::<Vec<IncomingMessage>>(&data)?.get(0)
-                == Some(&IncomingMessage::Success(SuccessMessage {
-                    msg: SuccessMessageType::Connected,
-                })) => {}
-        _ => panic!(),
-    }
-
-    sink.send(Message::Text(to_string(&OutgoingMessage::Auth(
-        AuthMessage::new(
-            app_config.alpaca_api_key.clone(),
-            app_config.alpaca_api_secret.clone(),
-        ),
-    ))?))
-    .await?;
-
-    match stream.next().await {
-        Some(Ok(Message::Text(data)))
-            if from_str::<Vec<IncomingMessage>>(&data)?.get(0)
-                == Some(&IncomingMessage::Success(SuccessMessage {
-                    msg: SuccessMessageType::Authenticated,
-                })) => {}
-        _ => panic!(),
-    }
-
-    let symbols = get_assets_with_class(&app_config.postgres_pool, &class)
-        .await?
-        .into_iter()
-        .map(|asset| asset.symbol)
-        .collect::<Vec<String>>();
-
-    if !symbols.is_empty() {
-        sink.send(Message::Text(to_string(&OutgoingMessage::Subscribe(
-            SubscribeMessage::from_vec(symbols),
-        ))?))
-        .await?;
-    }
-
-    let sink = Arc::new(RwLock::new(sink));
-
-    info!("Running live data thread for {:?}.", class);
-
-    spawn(broadcast_handler(
-        class,
-        sink.clone(),
-        asset_broadcast_receiver,
-    ));
-
-    websocket_handler(app_config, class, sink, stream).await?;
-
-    unreachable!()
-}
-
-pub async fn websocket_handler(
-    app_config: Arc<AppConfig>,
-    class: Class,
-    sink: Arc<RwLock<SplitSink<WebSocketStream<MaybeTlsStream<TcpStream>>, Message>>>,
-    mut stream: SplitStream<WebSocketStream<MaybeTlsStream<TcpStream>>>,
-) -> Result<(), Box<dyn Error + Send + Sync>> {
-    loop {
-        match stream.next().await {
-            Some(Ok(Message::Text(data))) => match from_str::<Vec<IncomingMessage>>(&data) {
-                Ok(parsed_data) => {
-                    for message in parsed_data {
-                        match message {
-                            IncomingMessage::Subscription(subscription_message) => {
-                                info!(
-                                    "Current {:?} subscriptions: {:?}",
-                                    class, subscription_message.bars
-                                );
-                            }
-                            IncomingMessage::Bars(bar_message)
-                            | IncomingMessage::UpdatedBars(bar_message) => {
-                                debug!("Incoming bar: {:?}", bar_message);
-                                add_bar(&app_config.postgres_pool, &Bar::from(bar_message)).await?;
-                            }
-                            message => {
-                                warn!("Unhandled incoming message: {:?}", message);
-                            }
-                        }
-                    }
-                }
-                Err(e) => {
-                    warn!("Unparsed incoming message: {:?}: {}", data, e);
-                }
-            },
-            Some(Ok(Message::Ping(_))) => sink.write().await.send(Message::Pong(vec![])).await?,
-            Some(unknown) => error!("Unknown incoming message: {:?}", unknown),
-            None => panic!(),
-        }
-    }
-}
-
-pub async fn broadcast_handler(
-    class: Class,
-    sink: Arc<RwLock<SplitSink<WebSocketStream<MaybeTlsStream<TcpStream>>, Message>>>,
-    mut asset_broadcast_receiver: Receiver<AssetBroadcastMessage>,
-) -> Result<(), Box<dyn Error + Send + Sync>> {
-    loop {
-        match asset_broadcast_receiver.recv().await? {
-            AssetBroadcastMessage::Added(asset) if asset.class == class => {
-                sink.write()
-                    .await
-                    .send(Message::Text(serde_json::to_string(
-                        &OutgoingMessage::Subscribe(SubscribeMessage::new(asset.symbol)),
-                    )?))
-                    .await?;
-            }
-            AssetBroadcastMessage::Deleted(asset) if asset.class == class => {
-                sink.write()
-                    .await
-                    .send(Message::Text(serde_json::to_string(
-                        &OutgoingMessage::Unsubscribe(SubscribeMessage::new(asset.symbol)),
-                    )?))
-                    .await?;
-            }
-            _ => {}
-        }
-    }
-}
--- a/backend/src/data/mod.rs
+++ b/backend/src/data/mod.rs
@@ -1,2 +0,0 @@
-pub mod calendar;
-pub mod live;
--- a/backend/src/database/assets.rs
+++ b/backend/src/database/assets.rs
@@ -1,87 +0,0 @@
-use crate::types::{Asset, Class, Exchange};
-use sqlx::{query_as, PgPool};
-use std::error::Error;
-
-pub async fn get_assets(
-    postgres_pool: &PgPool,
-) -> Result<Vec<Asset>, Box<dyn Error + Send + Sync>> {
-    query_as!(
-        Asset,
-        r#"SELECT symbol, class as "class: Class", exchange as "exchange: Exchange", trading, date_added FROM assets"#
-    )
-    .fetch_all(postgres_pool)
-    .await
-    .map_err(|e| e.into())
-}
-
-pub async fn get_assets_with_class(
-    postgres_pool: &PgPool,
-    class: &Class,
-) -> Result<Vec<Asset>, Box<dyn Error + Send + Sync>> {
-    query_as!(
-        Asset,
-        r#"SELECT symbol, class as "class: Class", exchange as "exchange: Exchange", trading, date_added FROM assets WHERE class = $1::CLASS"#, &class as &Class
-    )
-    .fetch_all(postgres_pool)
-    .await
-    .map_err(|e| e.into())
-}
-
-pub async fn get_asset(
-    postgres_pool: &PgPool,
-    symbol: &str,
-) -> Result<Option<Asset>, Box<dyn Error + Send + Sync>> {
-    query_as!(
-        Asset,
-        r#"SELECT symbol, class as "class: Class", exchange as "exchange: Exchange", trading, date_added FROM assets WHERE symbol = $1"#, symbol
-    )
-    .fetch_optional(postgres_pool)
-    .await
-    .map_err(|e| e.into())
-}
-
-pub async fn add_asset(
-    postgres_pool: &PgPool,
-    asset: &Asset,
-) -> Result<Asset, Box<dyn Error + Send + Sync>> {
-    query_as!(
-        Asset,
-        r#"INSERT INTO assets (symbol, class, exchange, trading, date_added) VALUES ($1, $2::CLASS, $3::EXCHANGE, $4, $5)
-        RETURNING symbol, class as "class: Class", exchange as "exchange: Exchange", trading, date_added"#,
-        asset.symbol, asset.class as Class, asset.exchange as Exchange, asset.trading, asset.date_added
-    )
-    .fetch_one(postgres_pool)
-    .await
-    .map_err(|e| e.into())
-}
-
-pub async fn update_asset_trading(
-    postgres_pool: &PgPool,
-    symbol: &str,
-    trading: &bool,
-) -> Result<Option<Asset>, Box<dyn Error + Send + Sync>> {
-    query_as!(
-        Asset,
-        r#"UPDATE assets SET trading = $1 WHERE symbol = $2
-        RETURNING symbol, class as "class: Class", exchange as "exchange: Exchange", trading, date_added"#,
-        trading, symbol
-    )
-    .fetch_optional(postgres_pool)
-    .await
-    .map_err(|e| e.into())
-}
-
-pub async fn delete_asset(
-    postgres_pool: &PgPool,
-    symbol: &str,
-) -> Result<Option<Asset>, Box<dyn Error + Send + Sync>> {
-    Ok(query_as!(
-        Asset,
-        r#"DELETE FROM assets WHERE symbol = $1
-        RETURNING symbol, class as "class: Class", exchange as "exchange: Exchange", trading, date_added"#,
-        symbol
-    )
-    .fetch_optional(postgres_pool)
-    .await
-    .unwrap())
-}
--- a/backend/src/database/bars.rs
+++ b/backend/src/database/bars.rs
@@ -1,58 +0,0 @@
-use crate::types::Bar;
-use sqlx::{query_as, PgPool};
-use std::error::Error;
-
-pub async fn add_bar(
-    postgres_pool: &PgPool,
-    bar: &Bar,
-) -> Result<Bar, Box<dyn Error + Send + Sync>> {
-    query_as!(
-        Bar,
-        r#"INSERT INTO bars (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
-        ON CONFLICT (timestamp, asset_symbol) DO UPDATE SET open = $3, high = $4, low = $5, close = $6, volume = $7, num_trades = $8, volume_weighted = $9
-        RETURNING timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted"#,
-        bar.timestamp, bar.asset_symbol, bar.open, bar.high, bar.low, bar.close, bar.volume, bar.num_trades, bar.volume_weighted
-    )
-    .fetch_one(postgres_pool)
-    .await
-    .map_err(|e| e.into())
-}
-
-#[allow(dead_code)]
-pub async fn add_bars(
-    postgres_pool: &PgPool,
-    bars: &Vec<Bar>,
-) -> Result<Vec<Bar>, Box<dyn Error + Send + Sync>> {
-    let mut timestamps = Vec::with_capacity(bars.len());
-    let mut asset_symbols = Vec::with_capacity(bars.len());
-    let mut opens = Vec::with_capacity(bars.len());
-    let mut highs = Vec::with_capacity(bars.len());
-    let mut lows = Vec::with_capacity(bars.len());
-    let mut closes = Vec::with_capacity(bars.len());
-    let mut volumes = Vec::with_capacity(bars.len());
-    let mut num_trades = Vec::with_capacity(bars.len());
-    let mut volumes_weighted = Vec::with_capacity(bars.len());
-
-    for bar in bars {
-        timestamps.push(bar.timestamp);
-        asset_symbols.push(bar.asset_symbol.clone());
-        opens.push(bar.open);
-        highs.push(bar.high);
-        lows.push(bar.low);
-        closes.push(bar.close);
-        volumes.push(bar.volume);
-        num_trades.push(bar.num_trades);
-        volumes_weighted.push(bar.volume_weighted);
-    }
-
-    query_as!(
-        Bar,
-        r#"INSERT INTO bars (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted)
-        SELECT * FROM UNNEST($1::timestamptz[], $2::text[], $3::float8[], $4::float8[], $5::float8[], $6::float8[], $7::float8[], $8::int8[], $9::float8[])
-        RETURNING timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted"#,
-        &timestamps, &asset_symbols, &opens, &highs, &lows, &closes, &volumes, &num_trades, &volumes_weighted
-    )
-    .fetch_all(postgres_pool)
-    .await
-    .map_err(|e| e.into())
-}
--- a/backend/src/database/calendar.rs
+++ b/backend/src/database/calendar.rs
@@ -1,54 +0,0 @@
-use crate::types::CalendarDate;
-use sqlx::{query_as, PgPool};
-use std::error::Error;
-
-pub async fn add_calendar_dates(
-    postgres_pool: &PgPool,
-    calendar_dates: &Vec<CalendarDate>,
-) -> Result<Vec<CalendarDate>, Box<dyn Error + Send + Sync>> {
-    let mut dates = Vec::with_capacity(calendar_dates.len());
-    let mut opens = Vec::with_capacity(calendar_dates.len());
-    let mut closes = Vec::with_capacity(calendar_dates.len());
-
-    for calendar_date in calendar_dates {
-        dates.push(calendar_date.date);
-        opens.push(calendar_date.open);
-        closes.push(calendar_date.close);
-    }
-
-    query_as!(
-        CalendarDate,
-        r#"INSERT INTO calendar (date, open, close)
-        SELECT * FROM UNNEST($1::date[], $2::time[], $3::time[])
-        RETURNING date, open, close"#,
-        &dates,
-        &opens,
-        &closes
-    )
-    .fetch_all(postgres_pool)
-    .await
-    .map_err(|e| e.into())
-}
-
-pub async fn delete_all_calendar_dates(
-    postgres_pool: &PgPool,
-) -> Result<Vec<CalendarDate>, Box<dyn Error + Send + Sync>> {
-    query_as!(
-        CalendarDate,
-        "DELETE FROM calendar RETURNING date, open, close"
-    )
-    .fetch_all(postgres_pool)
-    .await
-    .map_err(|e| e.into())
-}
-
-pub async fn reset_calendar_dates(
-    postgres_pool: &PgPool,
-    calendar_dates: &Vec<CalendarDate>,
-) -> Result<Vec<CalendarDate>, Box<dyn Error + Send + Sync>> {
-    let transaction = postgres_pool.begin().await?;
-    delete_all_calendar_dates(postgres_pool).await?;
-    let calendar_dates = add_calendar_dates(postgres_pool, calendar_dates).await;
-    transaction.commit().await?;
-    calendar_dates
-}
--- a/backend/src/main.rs
+++ b/backend/src/main.rs
@@ -1,46 +0,0 @@
-mod config;
-mod data;
-mod database;
-mod routes;
-mod types;
-
-use config::AppConfig;
-use dotenv::dotenv;
-use std::error::Error;
-use tokio::{spawn, sync::broadcast};
-use types::{AssetBroadcastMessage, Class};
-
-#[tokio::main]
-async fn main() -> Result<(), Box<dyn Error + Send + Sync>> {
-    dotenv().ok();
-    log4rs::init_file("log4rs.yaml", Default::default()).unwrap();
-    let app_config = AppConfig::arc_from_env().await.unwrap();
-    let mut threads = Vec::new();
-
-    threads.push(spawn(data::calendar::run(app_config.clone())));
-
-    let (asset_broadcast_sender, _) = broadcast::channel::<AssetBroadcastMessage>(100);
-
-    threads.push(spawn(data::live::run(
-        Class::UsEquity,
-        app_config.clone(),
-        asset_broadcast_sender.subscribe(),
-    )));
-
-    threads.push(spawn(data::live::run(
-        Class::Crypto,
-        app_config.clone(),
-        asset_broadcast_sender.subscribe(),
-    )));
-
-    threads.push(spawn(routes::run(
-        app_config.clone(),
-        asset_broadcast_sender,
-    )));
-
-    for thread in threads {
-        thread.await??;
-    }
-
-    unreachable!()
-}
--- a/backend/src/routes/assets.rs
+++ b/backend/src/routes/assets.rs
@@ -1,141 +0,0 @@
-use crate::config::AppConfig;
-use crate::database;
-use crate::database::assets::update_asset_trading;
-use crate::types::api;
-use crate::types::{Asset, AssetBroadcastMessage, Status};
-use axum::{extract::Path, http::StatusCode, Extension, Json};
-use log::info;
-use serde::Deserialize;
-use std::sync::Arc;
-use tokio::sync::broadcast::Sender;
-
-const ALPACA_ASSET_API_URL: &str = "https://api.alpaca.markets/v2/assets";
-
-pub async fn get_assets(
-    Extension(app_config): Extension<Arc<AppConfig>>,
-) -> Result<(StatusCode, Json<Vec<Asset>>), StatusCode> {
-    let assets = database::assets::get_assets(&app_config.postgres_pool)
-        .await
-        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
-
-    Ok((StatusCode::OK, Json(assets)))
-}
-
-pub async fn get_asset(
-    Extension(app_config): Extension<Arc<AppConfig>>,
-    Path(symbol): Path<String>,
-) -> Result<(StatusCode, Json<Asset>), StatusCode> {
-    let asset = database::assets::get_asset(&app_config.postgres_pool, &symbol)
-        .await
-        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
-
-    match asset {
-        Some(asset) => Ok((StatusCode::OK, Json(asset))),
-        None => Err(StatusCode::NOT_FOUND),
-    }
-}
-
-#[derive(Deserialize)]
-pub struct AddAssetRequest {
-    symbol: String,
-    trading: Option<bool>,
-}
-
-pub async fn add_asset(
-    Extension(app_config): Extension<Arc<AppConfig>>,
-    Extension(asset_broadcast_sender): Extension<Sender<AssetBroadcastMessage>>,
-    Json(request): Json<AddAssetRequest>,
-) -> Result<(StatusCode, Json<Asset>), StatusCode> {
-    if database::assets::get_asset(&app_config.postgres_pool, &request.symbol)
-        .await
-        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?
-        .is_some()
-    {
-        return Err(StatusCode::CONFLICT);
-    }
-
-    app_config.alpaca_rate_limit.until_ready().await;
-    let asset = app_config
-        .alpaca_client
-        .get(&format!("{}/{}", ALPACA_ASSET_API_URL, request.symbol))
-        .send()
-        .await
-        .map_err(|e| match e.status() {
-            Some(StatusCode::NOT_FOUND) => StatusCode::NOT_FOUND,
-            Some(StatusCode::FORBIDDEN) => panic!(),
-            _ => StatusCode::INTERNAL_SERVER_ERROR,
-        })?;
-
-    let asset = asset.json::<api::incoming::Asset>().await.unwrap();
-
-    if asset.status != Status::Active || !asset.tradable || !asset.fractionable {
-        return Err(StatusCode::FORBIDDEN);
-    }
-
-    let mut asset = Asset::from(asset);
-    if let Some(trading) = request.trading {
-        asset.trading = trading;
-    }
-
-    database::assets::add_asset(&app_config.postgres_pool, &asset)
-        .await
-        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
-
-    asset_broadcast_sender
-        .send(AssetBroadcastMessage::Added(asset.clone()))
-        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
-
-    info!("Added asset {}.", asset.symbol);
-    Ok((StatusCode::CREATED, Json(asset)))
-}
-
-#[allow(dead_code)]
-#[derive(Deserialize)]
-pub struct UpdateAssetRequest {
-    trading: bool,
-}
-
-pub async fn update_asset(
-    Extension(app_config): Extension<Arc<AppConfig>>,
-    Extension(asset_broadcast_sender): Extension<Sender<AssetBroadcastMessage>>,
-    Path(symbol): Path<String>,
-    Json(request): Json<UpdateAssetRequest>,
-) -> Result<(StatusCode, Json<Asset>), StatusCode> {
-    let asset = update_asset_trading(&app_config.postgres_pool, &symbol, &request.trading)
-        .await
-        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
-
-    match asset {
-        Some(asset) => {
-            asset_broadcast_sender
-                .send(AssetBroadcastMessage::Updated(asset.clone()))
-                .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
-
-            info!("Updated asset {}.", symbol);
-            Ok((StatusCode::OK, Json(asset)))
-        }
-        None => Err(StatusCode::NOT_FOUND),
-    }
-}
-
-pub async fn delete_asset(
-    Extension(app_config): Extension<Arc<AppConfig>>,
-    Extension(asset_broadcast_sender): Extension<Sender<AssetBroadcastMessage>>,
-    Path(symbol): Path<String>,
-) -> Result<StatusCode, StatusCode> {
-    let asset = database::assets::delete_asset(&app_config.postgres_pool, &symbol)
-        .await
-        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
-
-    match asset {
-        Some(asset) => {
-            asset_broadcast_sender
-                .send(AssetBroadcastMessage::Deleted(asset.clone()))
-                .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
-
-            info!("Deleted asset {}.", symbol);
-            Ok(StatusCode::NO_CONTENT)
-        }
-        None => Err(StatusCode::NOT_FOUND),
-    }
-}
--- a/backend/src/routes/mod.rs
+++ b/backend/src/routes/mod.rs
@@ -1,30 +0,0 @@
-use crate::{config::AppConfig, types::AssetBroadcastMessage};
-use axum::{
-    routing::{delete, get, post},
-    Extension, Router, Server,
-};
-use log::info;
-use std::{net::SocketAddr, sync::Arc};
-use tokio::sync::broadcast::Sender;
-
-pub mod assets;
-
-pub async fn run(
-    app_config: Arc<AppConfig>,
-    asset_broadcast_sender: Sender<AssetBroadcastMessage>,
-) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
-    let app = Router::new()
-        .route("/assets", get(assets::get_assets))
-        .route("/assets/:symbol", get(assets::get_asset))
-        .route("/assets", post(assets::add_asset))
-        .route("/assets/:symbol", post(assets::update_asset))
-        .route("/assets/:symbol", delete(assets::delete_asset))
-        .layer(Extension(app_config))
-        .layer(Extension(asset_broadcast_sender));
-
-    let addr = SocketAddr::from(([0, 0, 0, 0], 7878));
-    info!("Listening on {}...", addr);
-    Server::bind(&addr).serve(app.into_make_service()).await?;
-
-    unreachable!()
-}
--- a/backend/src/types/api/incoming/mod.rs
+++ b/backend/src/types/api/incoming/mod.rs
@@ -1,5 +0,0 @@
-pub mod asset;
-pub mod calendar;
-
-pub use asset::*;
-pub use calendar::*;
--- a/backend/src/types/api/outgoing/mod.rs
+++ b/backend/src/types/api/outgoing/mod.rs
--- a/backend/src/types/asset.rs
+++ b/backend/src/types/asset.rs
@@ -1,33 +0,0 @@
-use super::{api, class::Class, exchange::Exchange};
-use serde::{Deserialize, Serialize};
-use sqlx::FromRow;
-use time::OffsetDateTime;
-
-#[derive(Clone, Debug, PartialEq, FromRow, Serialize, Deserialize)]
-pub struct Asset {
-    pub symbol: String,
-    pub class: Class,
-    pub exchange: Exchange,
-    pub trading: bool,
-    pub date_added: OffsetDateTime,
-}
-
-impl From<api::incoming::Asset> for Asset {
-    fn from(asset: api::incoming::Asset) -> Self {
-        Self {
-            symbol: asset.symbol,
-            class: asset.class,
-            exchange: asset.exchange,
-            trading: asset.tradable,
-            date_added: OffsetDateTime::now_utc(),
-        }
-    }
-}
-
-#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
-pub enum AssetBroadcastMessage {
-    Added(Asset),
-    Updated(Asset),
-    Deleted(Asset),
-    Reset(Asset),
-}
--- a/backend/src/types/bar.rs
+++ b/backend/src/types/bar.rs
@@ -1,33 +0,0 @@
-use super::websocket;
-use serde::{Deserialize, Serialize};
-use sqlx::FromRow;
-use time::OffsetDateTime;
-
-#[derive(Clone, Debug, PartialEq, FromRow, Serialize, Deserialize)]
-pub struct Bar {
-    pub timestamp: OffsetDateTime,
-    pub asset_symbol: String,
-    pub open: f64,
-    pub high: f64,
-    pub low: f64,
-    pub close: f64,
-    pub volume: f64,
-    pub num_trades: i64,
-    pub volume_weighted: f64,
-}
-
-impl From<websocket::incoming::BarMessage> for Bar {
-    fn from(bar_message: websocket::incoming::BarMessage) -> Self {
-        Self {
-            timestamp: bar_message.timestamp,
-            asset_symbol: bar_message.symbol,
-            open: bar_message.open,
-            high: bar_message.high,
-            low: bar_message.low,
-            close: bar_message.close,
-            volume: bar_message.volume,
-            num_trades: bar_message.num_trades,
-            volume_weighted: bar_message.volume_weighted,
-        }
-    }
-}
--- a/backend/src/types/calendar.rs
+++ b/backend/src/types/calendar.rs
@@ -1,18 +0,0 @@
-use super::api;
-use time::{Date, Time};
-
-pub struct CalendarDate {
-    pub date: Date,
-    pub open: Time,
-    pub close: Time,
-}
-
-impl From<&api::incoming::CalendarDate> for CalendarDate {
-    fn from(calendar: &api::incoming::CalendarDate) -> Self {
-        Self {
-            date: calendar.date,
-            open: calendar.open,
-            close: calendar.close,
-        }
-    }
-}
--- a/backend/src/types/mod.rs
+++ b/backend/src/types/mod.rs
@@ -1,15 +0,0 @@
-pub mod api;
-pub mod asset;
-pub mod bar;
-pub mod calendar;
-pub mod class;
-pub mod exchange;
-pub mod status;
-pub mod websocket;
-
-pub use asset::*;
-pub use bar::*;
-pub use calendar::*;
-pub use class::*;
-pub use exchange::*;
-pub use status::*;
--- a/backend/src/types/websocket/incoming/success.rs
+++ b/backend/src/types/websocket/incoming/success.rs
@@ -1,14 +0,0 @@
-use serde::Deserialize;
-
-#[derive(Debug, PartialEq, Deserialize)]
-pub enum SuccessMessageType {
-    #[serde(rename = "connected")]
-    Connected,
-    #[serde(rename = "authenticated")]
-    Authenticated,
-}
-
-#[derive(Debug, PartialEq, Deserialize)]
-pub struct SuccessMessage {
-    pub msg: SuccessMessageType,
-}
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -4,10 +4,14 @@ services:
      file: support/timescaledb/docker-compose.yml
      service: timescaledb

-  backend:
-    extends:
-      file: backend/docker-compose.yml
-      service: backend
+  qrust:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    hostname: qrust
+    restart: unless-stopped
+    ports:
+      - 7878:7878
    depends_on:
      - timescaledb
    env_file:
--- a/backend/log4rs.yaml
+++ b/backend/log4rs.yaml
--- a/src/config.rs
+++ b/src/config.rs
@@ -0,0 +1,73 @@
+use crate::types::Source;
+use governor::{DefaultDirectRateLimiter, Quota, RateLimiter};
+use http::HeaderMap;
+use reqwest::Client;
+use sqlx::{postgres::PgPoolOptions, PgPool};
+use std::{env, num::NonZeroU32, sync::Arc};
+use time::{format_description::FormatItem, macros::format_description};
+use tokio::time::Duration;
+
+pub const ALPACA_ASSET_API_URL: &str = "https://api.alpaca.markets/v2/assets";
+pub const ALPACA_STOCK_DATA_URL: &str = "https://data.alpaca.markets/v2/stocks/bars";
+pub const ALPACA_CRYPTO_DATA_URL: &str = "https://data.alpaca.markets/v1beta3/crypto/us/bars";
+pub const ALPACA_STOCK_WEBSOCKET_URL: &str = "wss://stream.data.alpaca.markets/v2";
+pub const ALPACA_CRYPTO_WEBSOCKET_URL: &str = "wss://stream.data.alpaca.markets/v1beta3/crypto/us";
+pub const ALPACA_TIMESTAMP_FORMAT: &[FormatItem] =
+    format_description!("[year]-[month]-[day]T[hour]:[minute]:[second]Z");
+
+const NUM_CLIENTS: u32 = 10;
+
+pub struct Config {
+    pub alpaca_api_key: String,
+    pub alpaca_api_secret: String,
+    pub alpaca_client: Client,
+    pub alpaca_rate_limit: DefaultDirectRateLimiter,
+    pub alpaca_historical_offset: Duration,
+    pub alpaca_source: Source,
+    pub postgres_pool: PgPool,
+}
+
+impl Config {
+    pub async fn from_env() -> Self {
+        let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set.");
+        let alpaca_api_key = env::var("ALPACA_API_KEY").expect("ALPACA_API_KEY must be set.");
+        let alpaca_api_secret =
+            env::var("ALPACA_API_SECRET").expect("ALPACA_API_SECRET must be set.");
+        let alpaca_source: Source = env::var("ALPACA_SOURCE")
+            .expect("ALPACA_SOURCE must be set.")
+            .parse()
+            .expect("ALPACA_SOURCE must be a either 'iex' or 'sip'.");
+
+        Self {
+            alpaca_api_key: alpaca_api_key.clone(),
+            alpaca_api_secret: alpaca_api_secret.clone(),
+            alpaca_client: Client::builder()
+                .default_headers({
+                    let mut headers = HeaderMap::new();
+                    headers.insert("APCA-API-KEY-ID", alpaca_api_key.parse().unwrap());
+                    headers.insert("APCA-API-SECRET-KEY", alpaca_api_secret.parse().unwrap());
+                    headers
+                })
+                .build()
+                .unwrap(),
+            alpaca_rate_limit: RateLimiter::direct(Quota::per_minute(match alpaca_source {
+                Source::Iex => NonZeroU32::new(200).unwrap(),
+                Source::Sip => NonZeroU32::new(1000).unwrap(),
+            })),
+            alpaca_historical_offset: Duration::from_secs(match alpaca_source {
+                Source::Iex => 900,
+                Source::Sip => 0,
+            }),
+            alpaca_source,
+            postgres_pool: PgPoolOptions::new()
+                .max_connections(NUM_CLIENTS)
+                .connect(&database_url)
+                .await
+                .unwrap(),
+        }
+    }
+
+    pub async fn arc_from_env() -> Arc<Self> {
+        Arc::new(Self::from_env().await)
+    }
+}
--- a/src/data/historical.rs
+++ b/src/data/historical.rs
@@ -0,0 +1,143 @@
+use crate::{
+    config::{Config, ALPACA_CRYPTO_DATA_URL, ALPACA_STOCK_DATA_URL, ALPACA_TIMESTAMP_FORMAT},
+    database,
+    time::{next_minute, ONE_MINUTE},
+    types::{api::incoming, Asset, Bar, Class},
+};
+use http::StatusCode;
+use indexmap::IndexMap;
+use log::{error, info};
+use std::{collections::HashMap, sync::Arc};
+use time::OffsetDateTime;
+use tokio::{sync::RwLock, task::spawn_blocking, time::sleep};
+
+pub async fn backfill(
+    app_config: Arc<Config>,
+    asset: Asset,
+    backfilled: Arc<RwLock<HashMap<String, bool>>>,
+) {
+    info!("Backfilling historical data for {}...", asset.symbol);
+
+    let task_run_offsetdatetime = next_minute() + app_config.alpaca_historical_offset;
+    let fetch_from = asset.timestamp_last + ONE_MINUTE;
+    let fetch_until = task_run_offsetdatetime - app_config.alpaca_historical_offset - ONE_MINUTE;
+    if fetch_from > fetch_until {
+        return;
+    }
+
+    let mut current_time = fetch_from;
+    let asset_clone = asset.clone();
+
+    let mut bars = spawn_blocking(move || {
+        let mut bars = IndexMap::new();
+        while current_time <= fetch_until {
+            bars.insert(
+                current_time,
+                Bar::empty(current_time, asset_clone.symbol.clone()),
+            );
+            current_time += ONE_MINUTE;
+        }
+        bars
+    })
+    .await
+    .unwrap();
+
+    let wait_duration = task_run_offsetdatetime - OffsetDateTime::now_utc();
+    if wait_duration.is_positive() {
+        sleep(wait_duration.unsigned_abs()).await;
+    }
+
+    let mut next_page_token = None;
+    loop {
+        let request = app_config
+            .alpaca_client
+            .get(match asset.class {
+                Class::UsEquity => ALPACA_STOCK_DATA_URL,
+                Class::Crypto => ALPACA_CRYPTO_DATA_URL,
+            })
+            .query(&[
+                ("symbols", &asset.symbol),
+                ("timeframe", &String::from("1Min")),
+                (
+                    "start",
+                    &fetch_from
+                        .format(ALPACA_TIMESTAMP_FORMAT)
+                        .unwrap()
+                        .to_string(),
+                ),
+                (
+                    "end",
+                    &fetch_until
+                        .format(ALPACA_TIMESTAMP_FORMAT)
+                        .unwrap()
+                        .to_string(),
+                ),
+                ("limit", &String::from("10000")),
+                ("page_token", &next_page_token.clone().unwrap_or_default()),
+            ]);
+
+        app_config.alpaca_rate_limit.until_ready().await;
+        let response = request.send().await.unwrap();
+        let mut response = if response.status() == StatusCode::OK {
+            response.json::<incoming::bar::Message>().await.unwrap()
+        } else {
+            error!(
+                "Failed to backfill historical data for {} from {} to {}: {}",
+                asset.symbol,
+                fetch_from,
+                fetch_until,
+                response.text().await.unwrap()
+            );
+            break;
+        };
+
+        for bar in response.bars.remove(&asset.symbol).unwrap().unwrap() {
+            bars.insert(bar.timestamp, Bar::from((bar, asset.symbol.clone())));
+        }
+
+        if response.next_page_token.is_none() {
+            break;
+        }
+        next_page_token = response.next_page_token;
+    }
+
+    let bars = bars.into_values().collect::<Vec<Bar>>();
+
+    let transaction = app_config.postgres_pool.begin().await.unwrap();
+    database::bars::upsert_batch(&app_config.postgres_pool, &bars).await;
+    database::bars_filled::upsert_batch(&app_config.postgres_pool, &bars).await;
+    database::assets::update_timestamp_last_where_symbol(
+        &app_config.postgres_pool,
+        &asset.symbol,
+        &fetch_until,
+    )
+    .await;
+    backfill_recent_nulls(&app_config, &asset, &fetch_until, &backfilled).await;
+    transaction.commit().await.unwrap();
+
+    info!("Backfilled historical data for {}.", asset.symbol);
+}
+
+#[allow(clippy::significant_drop_tightening)]
+async fn backfill_recent_nulls(
+    app_config: &Arc<Config>,
+    asset: &Asset,
+    from: &OffsetDateTime,
+    backfilled: &Arc<RwLock<HashMap<String, bool>>>,
+) {
+    let mut backfilled = backfilled.write().await;
+    let bars = database::bars::select_where_symbol_where_timestamp_larger_than(
+        &app_config.postgres_pool,
+        &asset.symbol,
+        from,
+    )
+    .await;
+    database::bars_filled::upsert_batch(&app_config.postgres_pool, &bars).await;
+    database::assets::update_timestamp_last_where_symbol(
+        &app_config.postgres_pool,
+        &asset.symbol,
+        &bars.last().unwrap().timestamp,
+    )
+    .await;
+    backfilled.insert(asset.symbol.clone(), true);
+}
--- a/src/data/live.rs
+++ b/src/data/live.rs
@@ -0,0 +1,313 @@
+use crate::{
+    config::{Config, ALPACA_CRYPTO_WEBSOCKET_URL, ALPACA_STOCK_WEBSOCKET_URL},
+    data::historical::backfill,
+    database,
+    time::{duration_until, last_minute, next_30s, ONE_MINUTE, THIRTY_SECONDS},
+    types::{
+        asset,
+        websocket::{incoming, outgoing},
+        Bar, BroadcastMessage, Class,
+    },
+};
+use core::panic;
+use futures_util::{
+    stream::{SplitSink, SplitStream},
+    SinkExt, StreamExt,
+};
+use log::{error, info, warn};
+use serde_json::{from_str, to_string};
+use std::{
+    collections::{HashMap, HashSet},
+    sync::Arc,
+    time::Instant,
+};
+use tokio::{
+    net::TcpStream,
+    spawn,
+    sync::{
+        broadcast::{Receiver, Sender},
+        RwLock,
+    },
+    time::interval_at,
+};
+use tokio_tungstenite::{connect_async, tungstenite::Message, MaybeTlsStream, WebSocketStream};
+
+pub async fn run(
+    app_config: Arc<Config>,
+    class: Class,
+    asset_broadcast_sender: Sender<BroadcastMessage>,
+) {
+    info!("Running live data threads for {:?}.", class);
+
+    let websocket_url = match class {
+        Class::UsEquity => format!(
+            "{}/{}",
+            ALPACA_STOCK_WEBSOCKET_URL, app_config.alpaca_source
+        ),
+        Class::Crypto => ALPACA_CRYPTO_WEBSOCKET_URL.to_string(),
+    };
+
+    let (stream, _) = connect_async(websocket_url).await.unwrap();
+    let (mut sink, mut stream) = stream.split();
+    authenticate_websocket(&app_config, &mut stream, &mut sink).await;
+    let sink = Arc::new(RwLock::new(sink));
+
+    let backfilled = Arc::new(RwLock::new(HashMap::new()));
+
+    spawn(websocket_broadcast_handler(
+        class,
+        sink.clone(),
+        asset_broadcast_sender.subscribe(),
+    ));
+
+    database::assets::select_where_class(&app_config.postgres_pool, class)
+        .await
+        .into_iter()
+        .for_each(|asset| {
+            asset_broadcast_sender
+                .send(BroadcastMessage::Asset(asset::BroadcastMessage::Added(
+                    asset,
+                )))
+                .unwrap();
+        });
+
+    spawn(null_handler(app_config.clone(), backfilled.clone()));
+    websocket_message_handler(app_config, class, stream, sink, backfilled).await;
+
+    unreachable!()
+}
+
+async fn authenticate_websocket(
+    app_config: &Arc<Config>,
+    stream: &mut SplitStream<WebSocketStream<MaybeTlsStream<TcpStream>>>,
+    sink: &mut SplitSink<WebSocketStream<MaybeTlsStream<TcpStream>>, Message>,
+) {
+    match stream.next().await {
+        Some(Ok(Message::Text(data)))
+            if from_str::<Vec<incoming::Message>>(&data).unwrap().get(0)
+                == Some(&incoming::Message::Success(incoming::success::Message {
+                    msg: incoming::success::MessageType::Connected,
+                })) => {}
+        _ => panic!(),
+    }
+
+    sink.send(Message::Text(
+        to_string(&outgoing::Message::Auth(outgoing::auth::Message::new(
+            app_config.alpaca_api_key.clone(),
+            app_config.alpaca_api_secret.clone(),
+        )))
+        .unwrap(),
+    ))
+    .await
+    .unwrap();
+
+    match stream.next().await {
+        Some(Ok(Message::Text(data)))
+            if from_str::<Vec<incoming::Message>>(&data).unwrap().get(0)
+                == Some(&incoming::Message::Success(incoming::success::Message {
+                    msg: incoming::success::MessageType::Authenticated,
+                })) => {}
+        _ => panic!(),
+    };
+}
+
+async fn websocket_broadcast_handler(
+    class: Class,
+    sink: Arc<RwLock<SplitSink<WebSocketStream<MaybeTlsStream<TcpStream>>, Message>>>,
+    mut asset_broadcast_receiver: Receiver<BroadcastMessage>,
+) {
+    loop {
+        match asset_broadcast_receiver.recv().await.unwrap() {
+            BroadcastMessage::Asset(asset::BroadcastMessage::Added(asset))
+                if asset.class == class =>
+            {
+                sink.write()
+                    .await
+                    .send(Message::Text(
+                        serde_json::to_string(&outgoing::Message::Subscribe(
+                            outgoing::subscribe::Message::new(asset.clone().symbol),
+                        ))
+                        .unwrap(),
+                    ))
+                    .await
+                    .unwrap();
+            }
+            BroadcastMessage::Asset(asset::BroadcastMessage::Deleted(asset))
+                if asset.class == class =>
+            {
+                sink.write()
+                    .await
+                    .send(Message::Text(
+                        serde_json::to_string(&outgoing::Message::Unsubscribe(
+                            outgoing::subscribe::Message::new(asset.clone().symbol),
+                        ))
+                        .unwrap(),
+                    ))
+                    .await
+                    .unwrap();
+            }
+            BroadcastMessage::Asset(_) => {}
+        }
+    }
+}
+
+async fn websocket_message_handler(
+    app_config: Arc<Config>,
+    class: Class,
+    mut stream: SplitStream<WebSocketStream<MaybeTlsStream<TcpStream>>>,
+    sink: Arc<RwLock<SplitSink<WebSocketStream<MaybeTlsStream<TcpStream>>, Message>>>,
+    backfilled: Arc<RwLock<HashMap<String, bool>>>,
+) {
+    loop {
+        match stream.next().await {
+            Some(Ok(Message::Text(data))) => {
+                let parsed_data = from_str::<Vec<incoming::Message>>(&data);
+                if let Err(e) = &parsed_data {
+                    warn!("Unparsed incoming message: {:?}: {}", data, e);
+                }
+
+                for message in parsed_data.unwrap_or_default() {
+                    handle_message(&app_config, class, message, &backfilled).await;
+                }
+            }
+            Some(Ok(Message::Ping(_))) => sink
+                .write()
+                .await
+                .send(Message::Pong(vec![]))
+                .await
+                .unwrap(),
+            Some(unknown) => error!("Unknown incoming message: {:?}", unknown),
+            None => panic!(),
+        }
+    }
+}
+
+async fn handle_message(
+    app_config: &Arc<Config>,
+    class: Class,
+    message: incoming::Message,
+    backfilled: &Arc<RwLock<HashMap<String, bool>>>,
+) {
+    match message {
+        incoming::Message::Subscription(subscription_message) => {
+            let old_assets = backfilled
+                .read()
+                .await
+                .keys()
+                .cloned()
+                .collect::<HashSet<_>>();
+            let new_assets = subscription_message
+                .bars
+                .into_iter()
+                .collect::<HashSet<_>>();
+
+            let added_assets = new_assets.difference(&old_assets).collect::<HashSet<_>>();
+            let deleted_assets = old_assets.difference(&new_assets).collect::<HashSet<_>>();
+
+            for asset_symbol in &added_assets {
+                let asset =
+                    database::assets::select_where_symbol(&app_config.postgres_pool, asset_symbol)
+                        .await
+                        .unwrap();
+
+                backfilled.write().await.insert(asset.symbol.clone(), false);
+                spawn(backfill(
+                    app_config.clone(),
+                    asset.clone(),
+                    backfilled.clone(),
+                ));
+            }
+
+            for asset_symbol in &deleted_assets {
+                backfilled.write().await.remove(*asset_symbol);
+            }
+
+            info!(
+                "Subscription update for {:?}: {:?} added, {:?} deleted.",
+                class, added_assets, deleted_assets
+            );
+        }
+        incoming::Message::Bars(bar_message) => {
+            let bar = Bar::from(bar_message);
+            info!("Incoming bar for {}: {}", bar.asset_symbol, bar.timestamp);
+
+            let transaction = app_config.postgres_pool.begin().await.unwrap();
+            database::bars::upsert(&app_config.postgres_pool, &bar).await;
+            if *backfilled.read().await.get(&bar.asset_symbol).unwrap() {
+                database::bars_filled::upsert(&app_config.postgres_pool, &bar).await;
+            }
+            transaction.commit().await.unwrap();
+        }
+        incoming::Message::UpdatedBars(bar_message) => {
+            let bar = Bar::from(bar_message);
+            info!("Incoming bar for {}: {}", bar.asset_symbol, bar.timestamp);
+
+            let transaction = app_config.postgres_pool.begin().await.unwrap();
+            database::bars::upsert(&app_config.postgres_pool, &bar).await;
+            if *backfilled.read().await.get(&bar.asset_symbol).unwrap() {
+                database::bars_filled::upsert(&app_config.postgres_pool, &bar).await;
+                database::assets::update_timestamp_last_where_symbol(
+                    &app_config.postgres_pool,
+                    &bar.asset_symbol,
+                    &bar.timestamp,
+                )
+                .await;
+            }
+            transaction.commit().await.unwrap();
+        }
+        incoming::Message::Success(_) => {}
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum NullHandlerState {
+    Bars,
+    UpdatedBars,
+}
+
+#[allow(clippy::significant_drop_in_scrutinee)]
+async fn null_handler(app_config: Arc<Config>, backfilled: Arc<RwLock<HashMap<String, bool>>>) {
+    let next_30s = next_30s();
+    let mut state = if next_30s.unix_timestamp() % 30 == 0 {
+        NullHandlerState::Bars
+    } else {
+        NullHandlerState::UpdatedBars
+    };
+    let mut interval = interval_at(
+        (Instant::now() + duration_until(next_30s)).into(),
+        THIRTY_SECONDS,
+    );
+
+    loop {
+        interval.tick().await;
+        let timestamp = last_minute() - ONE_MINUTE;
+
+        let backfilled = backfilled.read().await;
+        for asset_symbol in backfilled.keys().cloned() {
+            let bar = Bar::empty(timestamp, asset_symbol);
+
+            let transaction = app_config.postgres_pool.begin().await.unwrap();
+
+            database::bars::insert_or_skip(&app_config.postgres_pool, &bar).await;
+            if *backfilled.get(&bar.asset_symbol).unwrap() {
+                database::bars_filled::insert_or_skip(&app_config.postgres_pool, &bar).await;
+
+                if state == NullHandlerState::UpdatedBars {
+                    database::assets::update_timestamp_last_where_symbol(
+                        &app_config.postgres_pool,
+                        &bar.asset_symbol,
+                        &bar.timestamp,
+                    )
+                    .await;
+                }
+            }
+
+            transaction.commit().await.unwrap();
+        }
+
+        state = match state {
+            NullHandlerState::Bars => NullHandlerState::UpdatedBars,
+            NullHandlerState::UpdatedBars => NullHandlerState::Bars,
+        };
+    }
+}
--- a/src/data/mod.rs
+++ b/src/data/mod.rs
@@ -0,0 +1,2 @@
+pub mod historical;
+pub mod live;
--- a/src/database/assets.rs
+++ b/src/database/assets.rs
@@ -0,0 +1,92 @@
+use crate::types::{Asset, Class, Exchange};
+use sqlx::{query_as, PgPool};
+use std::convert::Into;
+use time::OffsetDateTime;
+
+pub async fn select(postgres_pool: &PgPool) -> Vec<Asset> {
+    query_as!(
+        Asset,
+        r#"SELECT symbol, class as "class: Class", exchange as "exchange: Exchange", trading, timestamp_added, timestamp_first, timestamp_last FROM assets"#
+    )
+    .fetch_all(postgres_pool)
+    .await
+    .unwrap()
+}
+
+pub async fn select_where_class(postgres_pool: &PgPool, class: Class) -> Vec<Asset> {
+    query_as!(
+        Asset,
+        r#"SELECT symbol, class as "class: Class", exchange as "exchange: Exchange", trading, timestamp_added, timestamp_first, timestamp_last FROM assets WHERE class = $1::CLASS"#,
+        class as Class
+    )
+    .fetch_all(postgres_pool)
+    .await
+    .unwrap()
+}
+
+pub async fn select_where_symbol(postgres_pool: &PgPool, symbol: &str) -> Option<Asset> {
+    query_as!(
+        Asset,
+        r#"SELECT symbol, class as "class: Class", exchange as "exchange: Exchange", trading, timestamp_added, timestamp_first, timestamp_last FROM assets WHERE symbol = $1"#,
+        symbol
+    )
+    .fetch_optional(postgres_pool)
+    .await
+    .unwrap()
+}
+
+pub async fn insert(postgres_pool: &PgPool, asset: &Asset) -> Asset {
+    query_as!(
+        Asset,
+        r#"INSERT INTO assets (symbol, class, exchange, trading, timestamp_added, timestamp_first, timestamp_last) VALUES ($1, $2::CLASS, $3::EXCHANGE, $4, $5, $6, $7)
+        RETURNING symbol, class as "class: Class", exchange as "exchange: Exchange", trading, timestamp_added, timestamp_first, timestamp_last"#,
+        asset.symbol, asset.class as Class, asset.exchange as Exchange, asset.trading, asset.timestamp_added, asset.timestamp_first, asset.timestamp_last
+    )
+    .fetch_one(postgres_pool)
+    .await
+    .unwrap()
+}
+
+pub async fn update_trading_where_symbol(
+    postgres_pool: &PgPool,
+    symbol: &str,
+    trading: &bool,
+) -> Option<Asset> {
+    query_as!(
+        Asset,
+        r#"UPDATE assets SET trading = $1 WHERE symbol = $2
+        RETURNING symbol, class as "class: Class", exchange as "exchange: Exchange", trading, timestamp_added, timestamp_first, timestamp_last"#,
+        trading, symbol
+    )
+    .fetch_optional(postgres_pool)
+    .await
+    .unwrap()
+}
+
+pub async fn update_timestamp_last_where_symbol(
+    postgres_pool: &PgPool,
+    symbol: &str,
+    timestamp_last: &OffsetDateTime,
+) -> Option<Asset> {
+    query_as!(
+        Asset,
+        r#"UPDATE assets SET timestamp_last = $1 WHERE symbol = $2
+        RETURNING symbol, class as "class: Class", exchange as "exchange: Exchange", trading, timestamp_added, timestamp_first, timestamp_last"#,
+        timestamp_last, symbol
+    )
+    .fetch_optional(postgres_pool)
+    .await
+    .unwrap()
+}
+
+pub async fn delete_where_symbol(postgres_pool: &PgPool, symbol: &str) -> Option<Asset> {
+    query_as!(
+        Asset,
+        r#"DELETE FROM assets WHERE symbol = $1
+        RETURNING symbol, class as "class: Class", exchange as "exchange: Exchange", trading, timestamp_added, timestamp_first, timestamp_last"#,
+        symbol
+    )
+    .fetch_optional(postgres_pool)
+    .await
+    .unwrap()
+}
--- a/src/database/bars.rs
+++ b/src/database/bars.rs
@@ -0,0 +1,89 @@
+use crate::types::Bar;
+use sqlx::{query_as, PgPool, Postgres};
+use std::convert::Into;
+use time::OffsetDateTime;
+
+pub async fn upsert(postgres_pool: &PgPool, bar: &Bar) -> Bar {
+    query_as!(
+        Bar,
+        r#"INSERT INTO bars (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
+        ON CONFLICT (timestamp, asset_symbol) DO UPDATE SET open = $3, high = $4, low = $5, close = $6, volume = $7, num_trades = $8, volume_weighted = $9
+        RETURNING timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted"#,
+        bar.timestamp, bar.asset_symbol, bar.open, bar.high, bar.low, bar.close, bar.volume, bar.num_trades, bar.volume_weighted
+    )
+    .fetch_one(postgres_pool)
+    .await
+    .unwrap()
+}
+
+pub async fn insert_or_skip(postgres_pool: &PgPool, bar: &Bar) {
+    query_as!(
+        Bar,
+        r#"INSERT INTO bars (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
+        ON CONFLICT (timestamp, asset_symbol) DO NOTHING"#,
+        bar.timestamp, bar.asset_symbol, bar.open, bar.high, bar.low, bar.close, bar.volume, bar.num_trades, bar.volume_weighted
+    )
+    .execute(postgres_pool)
+    .await
+    .unwrap();
+}
+
+pub async fn upsert_batch(postgres_pool: &PgPool, bars: &[Bar]) -> Vec<Bar> {
+    let mut timestamp = Vec::with_capacity(bars.len());
+    let mut asset_symbol = Vec::with_capacity(bars.len());
+    let mut open = Vec::with_capacity(bars.len());
+    let mut high = Vec::with_capacity(bars.len());
+    let mut low = Vec::with_capacity(bars.len());
+    let mut close = Vec::with_capacity(bars.len());
+    let mut volume = Vec::with_capacity(bars.len());
+    let mut num_trades = Vec::with_capacity(bars.len());
+    let mut volume_weighted = Vec::with_capacity(bars.len());
+
+    for bar in bars {
+        timestamp.push(bar.timestamp);
+        asset_symbol.push(bar.asset_symbol.clone());
+        open.push(bar.open);
+        high.push(bar.high);
+        low.push(bar.low);
+        close.push(bar.close);
+        volume.push(bar.volume);
+        num_trades.push(bar.num_trades);
+        volume_weighted.push(bar.volume_weighted);
+    }
+
+    // No type-safety here because of NULLABLE bulk insert
+    query_as::<Postgres, Bar>(
+        r#"INSERT INTO bars (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted)
+        SELECT * FROM UNNEST($1::timestamptz[], $2::text[], $3::float8[], $4::float8[], $5::float8[], $6::float8[], $7::float8[], $8::int8[], $9::float8[])
+        ON CONFLICT (timestamp, asset_symbol) DO UPDATE SET open = EXCLUDED.open, high = EXCLUDED.high, low = EXCLUDED.low, close = EXCLUDED.close, volume = EXCLUDED.volume, num_trades = EXCLUDED.num_trades, volume_weighted = EXCLUDED.volume_weighted
+        RETURNING timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted"#,
+    )
+    .bind(timestamp)
+    .bind(asset_symbol)
+    .bind(open)
+    .bind(high)
+    .bind(low)
+    .bind(close)
+    .bind(volume)
+    .bind(num_trades)
+    .bind(volume_weighted)
+    .fetch_all(postgres_pool)
+    .await
+    .unwrap()
+}
+
+pub async fn select_where_symbol_where_timestamp_larger_than(
+    postgres_pool: &PgPool,
+    symbol: &str,
+    timestamp: &OffsetDateTime,
+) -> Vec<Bar> {
+    query_as!(
+        Bar,
+        r#"SELECT * FROM bars WHERE asset_symbol = $1 AND timestamp > $2 ORDER BY timestamp ASC"#,
+        symbol,
+        timestamp
+    )
+    .fetch_all(postgres_pool)
+    .await
+    .unwrap()
+}
--- a/src/database/bars_filled.rs
+++ b/src/database/bars_filled.rs
@@ -0,0 +1,133 @@
+use crate::types::Bar;
+use sqlx::{query_as, PgPool, Postgres};
+use std::convert::Into;
+
+pub async fn upsert(postgres_pool: &PgPool, bar: &Bar) -> Bar {
+    let mut bar = bar.clone();
+
+    if bar.open.is_none() || bar.high.is_none() || bar.low.is_none() || bar.close.is_none() {
+        let filled_bar = query_as!(
+            Bar,
+            r#"SELECT * FROM bars_filled WHERE timestamp < $1 AND asset_symbol = $2 ORDER BY timestamp DESC LIMIT 1"#,
+            bar.timestamp,
+            bar.asset_symbol
+        )
+        .fetch_one(postgres_pool)
+        .await
+        .unwrap();
+        bar.merge_empty(&filled_bar);
+    }
+
+    query_as!(
+        Bar,
+        r#"INSERT INTO bars_filled (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
+        ON CONFLICT (timestamp, asset_symbol) DO UPDATE SET open = $3, high = $4, low = $5, close = $6, volume = $7, num_trades = $8, volume_weighted = $9
+        RETURNING timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted"#,
+        bar.timestamp, bar.asset_symbol, bar.open, bar.high, bar.low, bar.close, bar.volume, bar.num_trades, bar.volume_weighted
+    )
+    .fetch_one(postgres_pool)
+    .await
+    .unwrap()
+}
+
+pub async fn insert_or_skip(postgres_pool: &PgPool, bar: &Bar) {
+    let mut bar = bar.clone();
+
+    if bar.open.is_none() || bar.high.is_none() || bar.low.is_none() || bar.close.is_none() {
+        let filled_bar = query_as!(
+            Bar,
+            r#"SELECT * FROM bars_filled WHERE timestamp < $1 AND asset_symbol = $2 ORDER BY timestamp DESC LIMIT 1"#,
+            bar.timestamp,
+            bar.asset_symbol
+        )
+        .fetch_one(postgres_pool)
+        .await
+        .unwrap();
+        bar.merge_empty(&filled_bar);
+    }
+
+    query_as!(
+        Bar,
+        r#"INSERT INTO bars_filled (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
+        ON CONFLICT (timestamp, asset_symbol) DO NOTHING"#,
+        bar.timestamp, bar.asset_symbol, bar.open, bar.high, bar.low, bar.close, bar.volume, bar.num_trades, bar.volume_weighted
+    )
+    .execute(postgres_pool)
+    .await
+    .unwrap();
+}
+
+pub async fn upsert_batch(postgres_pool: &PgPool, bars: &[Bar]) -> Vec<Bar> {
+    let mut bars = bars.to_vec();
+
+    if bars.is_empty() {
+        return bars;
+    }
+
+    if bars[0].open.is_none()
+        || bars[0].high.is_none()
+        || bars[0].low.is_none()
+        || bars[0].close.is_none()
+    {
+        let filled_bar = &query_as!(
+            Bar,
+            r#"SELECT * FROM bars_filled WHERE timestamp < $1 AND asset_symbol = $2 ORDER BY timestamp DESC LIMIT 1"#,
+            bars[0].timestamp,
+            bars[0].asset_symbol
+        )
+        .fetch_one(postgres_pool)
+        .await
+        .unwrap();
+        bars[0].merge_empty(filled_bar);
+    }
+
+    let mut timestamp = Vec::with_capacity(bars.len());
+    let mut asset_symbol = Vec::with_capacity(bars.len());
+    let mut open = Vec::with_capacity(bars.len());
+    let mut high = Vec::with_capacity(bars.len());
+    let mut low = Vec::with_capacity(bars.len());
+    let mut close = Vec::with_capacity(bars.len());
+    let mut volume = Vec::with_capacity(bars.len());
+    let mut num_trades = Vec::with_capacity(bars.len());
+    let mut volume_weighted = Vec::with_capacity(bars.len());
+
+    let mut last_filled_bar = bars[0].clone();
+
+    for mut bar in bars {
+        if bar.open.is_none() || bar.high.is_none() || bar.low.is_none() || bar.close.is_none() {
+            bar.merge_empty(&last_filled_bar);
+        } else {
+            last_filled_bar = bar.clone();
+        }
+
+        timestamp.push(bar.timestamp);
+        asset_symbol.push(bar.asset_symbol.clone());
+        open.push(bar.open);
+        high.push(bar.high);
+        low.push(bar.low);
+        close.push(bar.close);
+        volume.push(bar.volume);
+        num_trades.push(bar.num_trades);
+        volume_weighted.push(bar.volume_weighted);
+    }
+
+    // No type-safety here because of NULLABLE bulk insert
+    query_as::<Postgres, Bar>(
+        r#"INSERT INTO bars_filled (timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted)
+        SELECT * FROM UNNEST($1::timestamptz[], $2::text[], $3::float8[], $4::float8[], $5::float8[], $6::float8[], $7::float8[], $8::int8[], $9::float8[])
+        ON CONFLICT (timestamp, asset_symbol) DO UPDATE SET open = EXCLUDED.open, high = EXCLUDED.high, low = EXCLUDED.low, close = EXCLUDED.close, volume = EXCLUDED.volume, num_trades = EXCLUDED.num_trades, volume_weighted = EXCLUDED.volume_weighted
+        RETURNING timestamp, asset_symbol, open, high, low, close, volume, num_trades, volume_weighted"#,
+    )
+    .bind(timestamp)
+    .bind(asset_symbol)
+    .bind(open)
+    .bind(high)
+    .bind(low)
+    .bind(close)
+    .bind(volume)
+    .bind(num_trades)
+    .bind(volume_weighted)
+    .fetch_all(postgres_pool)
+    .await
+    .unwrap()
+}
--- a/backend/src/database/mod.rs
+++ b/backend/src/database/mod.rs
@@ -1,3 +1,3 @@
 pub mod assets;
 pub mod bars;
-pub mod calendar;
+pub mod bars_filled;
--- a/src/main.rs
+++ b/src/main.rs
@@ -0,0 +1,49 @@
+#![warn(clippy::all, clippy::pedantic, clippy::nursery)]
+#![allow(clippy::missing_docs_in_private_items)]
+
+mod config;
+mod data;
+mod database;
+mod routes;
+mod time;
+mod types;
+
+use config::Config;
+use dotenv::dotenv;
+use log4rs::config::Deserializers;
+use sqlx::error::BoxDynError;
+use tokio::{spawn, sync::broadcast};
+use types::{BroadcastMessage, Class};
+
+#[tokio::main]
+async fn main() -> Result<(), BoxDynError> {
+    dotenv().ok();
+    log4rs::init_file("log4rs.yaml", Deserializers::default())?;
+    let app_config = Config::arc_from_env().await;
+    let mut threads = Vec::new();
+
+    let (asset_broadcast_sender, _) = broadcast::channel::<BroadcastMessage>(100);
+
+    threads.push(spawn(data::live::run(
+        app_config.clone(),
+        Class::UsEquity,
+        asset_broadcast_sender.clone(),
+    )));
+
+    threads.push(spawn(data::live::run(
+        app_config.clone(),
+        Class::Crypto,
+        asset_broadcast_sender.clone(),
+    )));
+
+    threads.push(spawn(routes::run(
+        app_config.clone(),
+        asset_broadcast_sender,
+    )));
+
+    for thread in threads {
+        thread.await?;
+    }
+
+    unreachable!()
+}
--- a/src/routes/assets.rs
+++ b/src/routes/assets.rs
@@ -0,0 +1,171 @@
+use crate::config::{
+    Config, ALPACA_ASSET_API_URL, ALPACA_CRYPTO_DATA_URL, ALPACA_STOCK_DATA_URL,
+    ALPACA_TIMESTAMP_FORMAT,
+};
+use crate::database;
+use crate::types::Class;
+use crate::types::{api::incoming, asset, Asset, BroadcastMessage, Status};
+use axum::{extract::Path, http::StatusCode, Extension, Json};
+use log::info;
+use serde::Deserialize;
+use std::sync::Arc;
+use time::OffsetDateTime;
+use tokio::sync::broadcast::Sender;
+
+pub async fn get_all(
+    Extension(app_config): Extension<Arc<Config>>,
+) -> Result<(StatusCode, Json<Vec<Asset>>), StatusCode> {
+    let assets = database::assets::select(&app_config.postgres_pool).await;
+    Ok((StatusCode::OK, Json(assets)))
+}
+
+pub async fn get(
+    Extension(app_config): Extension<Arc<Config>>,
+    Path(symbol): Path<String>,
+) -> Result<(StatusCode, Json<Asset>), StatusCode> {
+    let asset = database::assets::select_where_symbol(&app_config.postgres_pool, &symbol).await;
+    asset.map_or(Err(StatusCode::NOT_FOUND), |asset| {
+        Ok((StatusCode::OK, Json(asset)))
+    })
+}
+
+#[derive(Deserialize)]
+pub struct AddAssetRequest {
+    symbol: String,
+    trading: Option<bool>,
+}
+
+pub async fn add(
+    Extension(app_config): Extension<Arc<Config>>,
+    Extension(asset_broadcast_sender): Extension<Sender<BroadcastMessage>>,
+    Json(request): Json<AddAssetRequest>,
+) -> Result<(StatusCode, Json<Asset>), StatusCode> {
+    if database::assets::select_where_symbol(&app_config.postgres_pool, &request.symbol)
+        .await
+        .is_some()
+    {
+        return Err(StatusCode::CONFLICT);
+    }
+
+    app_config.alpaca_rate_limit.until_ready().await;
+    let asset = app_config
+        .alpaca_client
+        .get(&format!("{}/{}", ALPACA_ASSET_API_URL, request.symbol))
+        .send()
+        .await
+        .map_err(|e| match e.status() {
+            Some(StatusCode::NOT_FOUND) => StatusCode::NOT_FOUND,
+            _ => panic!(),
+        })?;
+
+    let asset = asset.json::<incoming::Asset>().await.unwrap();
+
+    if asset.status != Status::Active || !asset.tradable || !asset.fractionable {
+        return Err(StatusCode::FORBIDDEN);
+    }
+
+    let mut earliest_bar_request = app_config
+        .alpaca_client
+        .get(match asset.class {
+            Class::UsEquity => ALPACA_STOCK_DATA_URL,
+            Class::Crypto => ALPACA_CRYPTO_DATA_URL,
+        })
+        .query(&[
+            ("symbols", &asset.symbol),
+            ("timeframe", &String::from("1Min")),
+            (
+                "start",
+                &OffsetDateTime::UNIX_EPOCH
+                    .format(ALPACA_TIMESTAMP_FORMAT)
+                    .unwrap(),
+            ),
+            ("limit", &String::from("1")),
+        ]);
+
+    if asset.class == Class::UsEquity {
+        earliest_bar_request =
+            earliest_bar_request.query(&[("feed", &app_config.alpaca_source.to_string())]);
+    }
+
+    let earliest_bar = earliest_bar_request
+        .send()
+        .await
+        .unwrap()
+        .json::<incoming::bar::Message>()
+        .await
+        .unwrap();
+
+    let earliest_bar = earliest_bar
+        .bars
+        .get(&asset.symbol)
+        .ok_or(StatusCode::NOT_FOUND)?
+        .as_ref()
+        .ok_or(StatusCode::NOT_FOUND)?
+        .first()
+        .ok_or(StatusCode::NOT_FOUND)?;
+
+    let asset = Asset::from((
+        asset,
+        request.trading.unwrap_or(false),
+        earliest_bar.timestamp,
+    ));
+
+    database::assets::insert(&app_config.postgres_pool, &asset).await;
+
+    asset_broadcast_sender
+        .send(BroadcastMessage::Asset(asset::BroadcastMessage::Added(
+            asset.clone(),
+        )))
+        .unwrap();
+
+    info!("Added asset {}.", asset.symbol);
+    Ok((StatusCode::CREATED, Json(asset)))
+}
+
+#[allow(dead_code)]
+#[derive(Deserialize)]
+pub struct UpdateAssetRequest {
+    trading: bool,
+}
+
+pub async fn update(
+    Extension(app_config): Extension<Arc<Config>>,
+    Extension(asset_broadcast_sender): Extension<Sender<BroadcastMessage>>,
+    Path(symbol): Path<String>,
+    Json(request): Json<UpdateAssetRequest>,
+) -> Result<(StatusCode, Json<Asset>), StatusCode> {
+    let asset = database::assets::update_trading_where_symbol(
+        &app_config.postgres_pool,
+        &symbol,
+        &request.trading,
+    )
+    .await;
+
+    asset.map_or(Err(StatusCode::NOT_FOUND), |asset| {
+        asset_broadcast_sender
+            .send(BroadcastMessage::Asset(asset::BroadcastMessage::Updated(
+                asset.clone(),
+            )))
+            .unwrap();
+        info!("Updated asset {}.", symbol);
+        Ok((StatusCode::OK, Json(asset)))
+    })
+}
+
+pub async fn delete(
+    Extension(app_config): Extension<Arc<Config>>,
+    Extension(asset_broadcast_sender): Extension<Sender<BroadcastMessage>>,
+    Path(symbol): Path<String>,
+) -> Result<StatusCode, StatusCode> {
+    let asset = database::assets::delete_where_symbol(&app_config.postgres_pool, &symbol).await;
+
+    asset.map_or(Err(StatusCode::NOT_FOUND), |asset| {
+        asset_broadcast_sender
+            .send(BroadcastMessage::Asset(asset::BroadcastMessage::Deleted(
+                asset,
+            )))
+            .unwrap();
+        info!("Deleted asset {}.", symbol);
+        Ok(StatusCode::NO_CONTENT)
+    })
+}
--- a/src/routes/mod.rs
+++ b/src/routes/mod.rs
@@ -0,0 +1,30 @@
+use crate::{config::Config, types::BroadcastMessage};
+use axum::{
+    routing::{delete, get, post},
+    Extension, Router, Server,
+};
+use log::info;
+use std::{net::SocketAddr, sync::Arc};
+use tokio::sync::broadcast::Sender;
+
+pub mod assets;
+
+pub async fn run(app_config: Arc<Config>, asset_broadcast_sender: Sender<BroadcastMessage>) {
+    let app = Router::new()
+        .route("/assets", get(assets::get_all))
+        .route("/assets/:symbol", get(assets::get))
+        .route("/assets", post(assets::add))
+        .route("/assets/:symbol", post(assets::update))
+        .route("/assets/:symbol", delete(assets::delete))
+        .layer(Extension(app_config))
+        .layer(Extension(asset_broadcast_sender));
+
+    let addr = SocketAddr::from(([0, 0, 0, 0], 7878));
+    info!("Listening on {}.", addr);
+    Server::bind(&addr)
+        .serve(app.into_make_service())
+        .await
+        .unwrap();
+
+    unreachable!()
+}
--- a/src/time.rs
+++ b/src/time.rs
@@ -0,0 +1,34 @@
+use std::time::Duration;
+use time::OffsetDateTime;
+
+pub const THIRTY_SECONDS: Duration = Duration::from_secs(30);
+pub const ONE_MINUTE: Duration = Duration::from_secs(60);
+
+pub fn last_minute() -> OffsetDateTime {
+    let now_timestamp = OffsetDateTime::now_utc().unix_timestamp();
+    OffsetDateTime::from_unix_timestamp(now_timestamp - now_timestamp % 60).unwrap()
+}
+
+pub fn next_minute() -> OffsetDateTime {
+    last_minute() + ONE_MINUTE
+}
+
+pub fn last_30s() -> OffsetDateTime {
+    let now_timestamp = OffsetDateTime::now_utc().unix_timestamp();
+    OffsetDateTime::from_unix_timestamp(now_timestamp - now_timestamp % 30).unwrap()
+}
+
+pub fn next_30s() -> OffsetDateTime {
+    last_30s() + THIRTY_SECONDS
+}
+
+pub fn duration_until(time: OffsetDateTime) -> Duration {
+    let now = OffsetDateTime::now_utc();
+    let duration = time - now;
+
+    if duration.is_positive() {
+        duration.unsigned_abs()
+    } else {
+        Duration::default()
+    }
+}
--- a/backend/src/types/api/incoming/asset.rs
+++ b/backend/src/types/api/incoming/asset.rs
@@ -1,3 +1,5 @@
+#![allow(clippy::struct_excessive_bools)]
+
 use crate::types::{Class, Exchange, Status};
 use serde::Deserialize;

--- a/src/types/api/incoming/bar.rs
+++ b/src/types/api/incoming/bar.rs
@@ -0,0 +1,30 @@
+use serde::Deserialize;
+use std::collections::HashMap;
+use time::OffsetDateTime;
+
+#[derive(Debug, PartialEq, Deserialize)]
+pub struct Bar {
+    #[serde(rename = "t")]
+    #[serde(with = "time::serde::rfc3339")]
+    pub timestamp: OffsetDateTime,
+    #[serde(rename = "o")]
+    pub open: f64,
+    #[serde(rename = "h")]
+    pub high: f64,
+    #[serde(rename = "l")]
+    pub low: f64,
+    #[serde(rename = "c")]
+    pub close: f64,
+    #[serde(rename = "v")]
+    pub volume: f64,
+    #[serde(rename = "n")]
+    pub num_trades: i64,
+    #[serde(rename = "vw")]
+    pub volume_weighted: f64,
+}
+
+#[derive(Debug, PartialEq, Deserialize)]
+pub struct Message {
+    pub bars: HashMap<String, Option<Vec<Bar>>>,
+    pub next_page_token: Option<String>,
+}
--- a/backend/src/types/api/incoming/calendar.rs
+++ b/backend/src/types/api/incoming/calendar.rs
@@ -1,7 +1,7 @@
 use serde::{Deserialize, Deserializer};
 use time::{macros::format_description, Date, Time};

-#[derive(Debug, PartialEq, Deserialize)]
+#[derive(Debug, PartialEq, Eq, Deserialize)]
 pub struct CalendarDate {
    #[serde(deserialize_with = "deserialize_date")]
    pub date: Date,
--- a/src/types/api/incoming/mod.rs
+++ b/src/types/api/incoming/mod.rs
@@ -0,0 +1,7 @@
+pub mod asset;
+pub mod bar;
+pub mod calendar_date;
+
+pub use asset::Asset;
+pub use bar::Bar;
+pub use calendar_date::CalendarDate;
--- a/backend/src/types/websocket/mod.rs
+++ b/backend/src/types/websocket/mod.rs
@@ -1,2 +1 @@
 pub mod incoming;
-pub mod outgoing;
--- a/src/types/asset.rs
+++ b/src/types/asset.rs
@@ -0,0 +1,37 @@
+use super::{api::incoming, class::Class, exchange::Exchange};
+use serde::{Deserialize, Serialize};
+use sqlx::FromRow;
+use time::OffsetDateTime;
+
+#[derive(Clone, Debug, PartialEq, Eq, FromRow, Serialize, Deserialize, Hash)]
+pub struct Asset {
+    pub symbol: String,
+    pub class: Class,
+    pub exchange: Exchange,
+    pub trading: bool,
+    pub timestamp_added: OffsetDateTime,
+    pub timestamp_first: OffsetDateTime,
+    pub timestamp_last: OffsetDateTime,
+}
+
+impl From<(incoming::Asset, bool, OffsetDateTime)> for Asset {
+    fn from((asset, trading, timestamp_first): (incoming::Asset, bool, OffsetDateTime)) -> Self {
+        Self {
+            symbol: asset.symbol,
+            class: asset.class,
+            exchange: asset.exchange,
+            trading,
+            timestamp_added: OffsetDateTime::now_utc(),
+            timestamp_first,
+            timestamp_last: timestamp_first,
+        }
+    }
+}
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub enum BroadcastMessage {
+    Added(Asset),
+    Updated(Asset),
+    Deleted(Asset),
+    Reset(Asset),
+}
--- a/src/types/bar.rs
+++ b/src/types/bar.rs
@@ -0,0 +1,72 @@
+use super::{api, websocket};
+use serde::{Deserialize, Serialize};
+use sqlx::FromRow;
+use time::OffsetDateTime;
+
+#[derive(Clone, Debug, PartialEq, FromRow, Serialize, Deserialize)]
+pub struct Bar {
+    pub timestamp: OffsetDateTime,
+    pub asset_symbol: String,
+    pub open: Option<f64>,
+    pub high: Option<f64>,
+    pub low: Option<f64>,
+    pub close: Option<f64>,
+    pub volume: f64,
+    pub num_trades: i64,
+    pub volume_weighted: f64,
+}
+
+impl Bar {
+    pub const fn empty(timestamp: OffsetDateTime, asset_symbol: String) -> Self {
+        Self {
+            timestamp,
+            asset_symbol,
+            open: None,
+            high: None,
+            low: None,
+            close: None,
+            volume: 0.0,
+            num_trades: 0,
+            volume_weighted: 0.0,
+        }
+    }
+
+    pub fn merge_empty(&mut self, other: &Self) {
+        self.open = other.open;
+        self.high = other.high;
+        self.low = other.low;
+        self.close = other.close;
+    }
+}
+
+impl From<websocket::incoming::bar::Message> for Bar {
+    fn from(bar_message: websocket::incoming::bar::Message) -> Self {
+        Self {
+            timestamp: bar_message.timestamp,
+            asset_symbol: bar_message.symbol,
+            open: Some(bar_message.open),
+            high: Some(bar_message.high),
+            low: Some(bar_message.low),
+            close: Some(bar_message.close),
+            volume: bar_message.volume,
+            num_trades: bar_message.num_trades,
+            volume_weighted: bar_message.volume_weighted,
+        }
+    }
+}
+
+impl From<(api::incoming::Bar, String)> for Bar {
+    fn from((bar, asset_symbol): (api::incoming::Bar, String)) -> Self {
+        Self {
+            timestamp: bar.timestamp,
+            asset_symbol,
+            open: Some(bar.open),
+            high: Some(bar.high),
+            low: Some(bar.low),
+            close: Some(bar.close),
+            volume: bar.volume,
+            num_trades: bar.num_trades,
+            volume_weighted: bar.volume_weighted,
+        }
+    }
+}
--- a/backend/src/types/class.rs
+++ b/backend/src/types/class.rs
@@ -1,7 +1,7 @@
 use serde::{Deserialize, Serialize};
 use sqlx::Type;

-#[derive(Clone, Copy, Debug, PartialEq, Serialize, Deserialize, Type)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize, Type, Hash)]
 pub enum Class {
    #[sqlx(rename = "us_equity")]
    #[serde(rename = "us_equity")]
--- a/backend/src/types/exchange.rs
+++ b/backend/src/types/exchange.rs
@@ -1,7 +1,7 @@
 use serde::{Deserialize, Serialize};
 use sqlx::Type;

-#[derive(Clone, Copy, Debug, PartialEq, Serialize, Deserialize, Type)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize, Type, Hash)]
 pub enum Exchange {
    #[sqlx(rename = "AMEX")]
    #[serde(rename = "AMEX")]
--- a/src/types/mod.rs
+++ b/src/types/mod.rs
@@ -0,0 +1,22 @@
+pub mod api;
+pub mod asset;
+pub mod bar;
+pub mod class;
+pub mod exchange;
+pub mod source;
+pub mod status;
+pub mod websocket;
+
+pub use asset::Asset;
+pub use bar::Bar;
+pub use class::Class;
+pub use exchange::Exchange;
+pub use source::Source;
+pub use status::Status;
+
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub enum BroadcastMessage {
+    Asset(asset::BroadcastMessage),
+}
--- a/src/types/source.rs
+++ b/src/types/source.rs
@@ -0,0 +1,31 @@
+use std::{
+    fmt::{Display, Formatter},
+    str::FromStr,
+};
+
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum Source {
+    Iex,
+    Sip,
+}
+
+impl FromStr for Source {
+    type Err = String;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        match s {
+            "iex" => Ok(Self::Iex),
+            "sip" => Ok(Self::Sip),
+            _ => Err(format!("Unknown source: {s}")),
+        }
+    }
+}
+
+impl Display for Source {
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), std::fmt::Error> {
+        match self {
+            Self::Iex => write!(f, "iex"),
+            Self::Sip => write!(f, "sip"),
+        }
+    }
+}
--- a/backend/src/types/status.rs
+++ b/backend/src/types/status.rs
@@ -1,7 +1,7 @@
 use serde::{Deserialize, Serialize};
 use sqlx::Type;

-#[derive(Clone, Copy, Debug, PartialEq, Serialize, Deserialize, Type)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize, Type)]
 pub enum Status {
    #[sqlx(rename = "active")]
    #[serde(rename = "active")]
--- a/backend/src/types/websocket/incoming/bar.rs
+++ b/backend/src/types/websocket/incoming/bar.rs
@@ -2,7 +2,7 @@ use serde::Deserialize;
 use time::OffsetDateTime;

 #[derive(Debug, PartialEq, Deserialize)]
-pub struct BarMessage {
+pub struct Message {
    #[serde(rename = "t")]
    #[serde(with = "time::serde::rfc3339")]
    pub timestamp: OffsetDateTime,
--- a/backend/src/types/websocket/incoming/mod.rs
+++ b/backend/src/types/websocket/incoming/mod.rs
@@ -2,21 +2,17 @@ pub mod bar;
 pub mod subscription;
 pub mod success;

-pub use bar::*;
-pub use subscription::*;
-pub use success::*;
-
 use serde::Deserialize;

 #[derive(Debug, Deserialize, PartialEq)]
 #[serde(tag = "T")]
-pub enum IncomingMessage {
+pub enum Message {
    #[serde(rename = "success")]
-    Success(SuccessMessage),
+    Success(success::Message),
    #[serde(rename = "subscription")]
-    Subscription(SubscriptionMessage),
+    Subscription(subscription::Message),
    #[serde(rename = "b")]
-    Bars(BarMessage),
+    Bars(bar::Message),
    #[serde(rename = "u")]
-    UpdatedBars(BarMessage),
+    UpdatedBars(bar::Message),
 }
--- a/backend/src/types/websocket/incoming/subscription.rs
+++ b/backend/src/types/websocket/incoming/subscription.rs
@@ -1,7 +1,7 @@
 use serde::Deserialize;

-#[derive(Debug, PartialEq, Deserialize)]
-pub struct SubscriptionMessage {
+#[derive(Debug, PartialEq, Eq, Deserialize)]
+pub struct Message {
    pub trades: Vec<String>,
    pub quotes: Vec<String>,
    pub bars: Vec<String>,
--- a/src/types/websocket/incoming/success.rs
+++ b/src/types/websocket/incoming/success.rs
@@ -0,0 +1,14 @@
+use serde::Deserialize;
+
+#[derive(Debug, PartialEq, Eq, Deserialize)]
+pub enum MessageType {
+    #[serde(rename = "connected")]
+    Connected,
+    #[serde(rename = "authenticated")]
+    Authenticated,
+}
+
+#[derive(Debug, PartialEq, Eq, Deserialize)]
+pub struct Message {
+    pub msg: MessageType,
+}
--- a/backend/src/types/api/mod.rs
+++ b/backend/src/types/api/mod.rs
--- a/backend/src/types/websocket/outgoing/auth.rs
+++ b/backend/src/types/websocket/outgoing/auth.rs
@@ -1,13 +1,13 @@
 use serde::Serialize;

 #[derive(Debug, Serialize)]
-pub struct AuthMessage {
+pub struct Message {
    key: String,
    secret: String,
 }

-impl AuthMessage {
-    pub fn new(key: String, secret: String) -> Self {
+impl Message {
+    pub const fn new(key: String, secret: String) -> Self {
        Self { key, secret }
    }
 }
--- a/backend/src/types/websocket/outgoing/mod.rs
+++ b/backend/src/types/websocket/outgoing/mod.rs
@@ -1,18 +1,15 @@
 pub mod auth;
 pub mod subscribe;

-pub use auth::*;
-pub use subscribe::*;
-
 use serde::Serialize;

 #[derive(Debug, Serialize)]
 #[serde(tag = "action")]
-pub enum OutgoingMessage {
+pub enum Message {
    #[serde(rename = "auth")]
-    Auth(AuthMessage),
+    Auth(auth::Message),
    #[serde(rename = "subscribe")]
-    Subscribe(SubscribeMessage),
+    Subscribe(subscribe::Message),
    #[serde(rename = "unsubscribe")]
-    Unsubscribe(SubscribeMessage),
+    Unsubscribe(subscribe::Message),
 }
--- a/backend/src/types/websocket/outgoing/subscribe.rs
+++ b/backend/src/types/websocket/outgoing/subscribe.rs
@@ -1,24 +1,17 @@
 use serde::Serialize;

 #[derive(Debug, Serialize)]
-pub struct SubscribeMessage {
+pub struct Message {
    bars: Vec<String>,
    #[serde(rename = "updatedBars")]
    updated_bars: Vec<String>,
 }

-impl SubscribeMessage {
+impl Message {
    pub fn new(symbol: String) -> Self {
        Self {
            bars: vec![symbol.clone()],
            updated_bars: vec![symbol],
        }
    }
-
-    pub fn from_vec(symbols: Vec<String>) -> Self {
-        Self {
-            bars: symbols.clone(),
-            updated_bars: symbols,
-        }
-    }
 }
--- a/support/timescaledb/999_init.sh
+++ b/support/timescaledb/999_init.sh
@@ -19,12 +19,29 @@ psql --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
        class CLASS NOT NULL,
        exchange EXCHANGE NOT NULL,
        trading BOOLEAN NOT NULL DEFAULT FALSE,
-        date_added TIMESTAMPTZ NOT NULL DEFAULT NOW()
+        timestamp_added TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+        timestamp_first TIMESTAMPTZ NOT NULL,
+        timestamp_last TIMESTAMPTZ NOT NULL
    );

    CREATE TABLE bars (
-        timestamp TIMESTAMPTZ NOT NULL,
-        asset_symbol TEXT NOT NULL REFERENCES assets(symbol) ON DELETE CASCADE ON UPDATE CASCADE,
+        timestamp TIMESTAMPTZ,
+        asset_symbol TEXT REFERENCES assets(symbol) ON DELETE CASCADE ON UPDATE CASCADE,
+        open DOUBLE PRECISION,
+        high DOUBLE PRECISION,
+        low DOUBLE PRECISION,
+        close DOUBLE PRECISION,
+        volume DOUBLE PRECISION NOT NULL,
+        num_trades BIGINT NOT NULL,
+        volume_weighted DOUBLE PRECISION NOT NULL,
+        PRIMARY KEY (asset_symbol, timestamp)
+    );
+
+    SELECT create_hypertable('bars', 'timestamp', 'asset_symbol', 15);
+
+    CREATE TABLE bars_filled (
+        timestamp TIMESTAMPTZ,
+        asset_symbol TEXT REFERENCES assets(symbol) ON DELETE CASCADE ON UPDATE CASCADE,
        open DOUBLE PRECISION NOT NULL,
        high DOUBLE PRECISION NOT NULL,
        low DOUBLE PRECISION NOT NULL,
@@ -35,27 +52,5 @@ psql --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
        PRIMARY KEY (asset_symbol, timestamp)
    );

-    SELECT create_hypertable('bars', 'timestamp', 'asset_symbol', 2);
-
-    CREATE TABLE calendar (
-        date DATE NOT NULL PRIMARY KEY,
-        open TIME NOT NULL,
-        close TIME NOT NULL
-    );
-
-    CREATE VIEW bars_missing AS
-        WITH time_series AS (
-            SELECT
-                asset_symbol,
-                generate_series(MIN(timestamp), NOW(), interval '1 minute')::TIMESTAMPTZ AS expected_time
-            FROM bars
-            GROUP BY asset_symbol
-        )
-        SELECT
-            ts.asset_symbol,
-            ts.expected_time AS missing_time
-        FROM time_series ts
-        LEFT JOIN bars b
-            ON ts.asset_symbol = b.asset_symbol AND ts.expected_time = b.timestamp
-        WHERE b.timestamp IS NULL;
+    SELECT create_hypertable('bars_filled', 'timestamp', 'asset_symbol', 15);
 EOSQL