diff --git a/src/database.ts b/src/database.ts
index 9fe7282..77ba048 100644
--- a/src/database.ts
+++ b/src/database.ts
@@ -1,5 +1,33 @@
 import Database from "better-sqlite3";
 
-export default function getDB() {
+function getDB() {
     return new Database('store.db', { verbose: console.log })
-}
\ No newline at end of file
+}
+
+function prepareDB(db: Database.Database) {
+    // setup tiers table
+    db.exec("CREATE TABLE IF NOT EXISTS tiers (tier INTEGER, enchantment INTEGER, PRIMARY KEY(tier, enchantment));");
+    db.exec(`INSERT OR IGNORE INTO tiers (tier, enchantment) VALUES (1,0), (2,0), (3,0),
+        (4,0), (4,1), (4,2), (4,3), (4,4),
+        (5,0), (5,1), (5,2), (5,3), (5,4),
+        (6,0), (6,1), (6,2), (6,3), (6,4),
+        (7,0), (7,1), (7,2), (7,3), (7,4),
+        (8,0), (8,1), (8,2), (8,3), (8,4)`
+    );
+
+    // setup item types table
+    db.exec("CREATE TABLE IF NOT EXISTS types (type TEXT PRIMARY KEY);");
+    db.exec("INSERT OR IGNORE INTO types (type) VALUES ('cloth'), ('leather'), ('bar'), ('block'), ('plank'), ('fee_crafting'), ('fee_market');");
+
+    // create transactions table
+    db.exec("CREATE TABLE IF NOT EXISTS transactions (id INTEGER PRIMARY KEY AUTOINCREMENT, timestamp INTEGER DEFAULT (unixepoch()), tier INTEGER, enchantment INTEGER, type TEXT, silver INT, CONSTRAINT fk_tier FOREIGN KEY (tier, enchantment) REFERENCES tiers(tier, enchantment), CONSTRAINT fk_type FOREIGN KEY (type) REFERENCES types(type));");
+}
+
+
+function insertTransaction(db: Database.Database, tier: number, enchantment: number, type: string, silver: number): boolean {
+    console.log("insertTransaction", tier, enchantment, type, silver);
+    return db.prepare("INSERT INTO transactions (tier, enchantment, type, silver) VALUES (?, ?, ?, ?);").run(tier, enchantment, type, silver).changes > 0;
+}
+
+
+export { getDB, prepareDB, insertTransaction };
\ No newline at end of file
diff --git a/src/main.ts b/src/main.ts
index 5490a78..c48c92e 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,10 +1,10 @@
 import express from 'express';
-import prepareDB from './prepare';
-import getDB from './database';
+import { getDB, insertTransaction, prepareDB } from './database';
 import { tiers, type, transaction } from './types';
 
 const app = express();
 
+
 app.get("/tiers", (_, res) => {
     const db = getDB();
     res.header("Access-Control-Allow-Origin", process.env.CORS_HEADER);
@@ -24,7 +24,44 @@ app.get("/transactions", (_, res) => {
     res.header("Access-Control-Allow-Origin", process.env.CORS_HEADER);
     res.send((db.prepare("SELECT * FROM transactions").all() as transaction[]));
     db.close();
-})
+});
+
+app.options("/transactions", (_, res) => {
+    res.header("Access-Control-Allow-Origin", process.env.CORS_HEADER);
+    res.header("Access-Control-Allow-Methods", "POST, GET, OPTIONS");
+    res.header("Access-Control-Allow-Headers", "Content-Type");
+    res.send();
+});
+
+app.post("/transactions", express.json(), (req, res) => {
+    res.header("Access-Control-Allow-Origin", process.env.CORS_HEADER);
+    console.log(req.body);
+    const { tier, enchantment, type, silver } = req.body;
+    if (typeof tier !== "number" || tier < 1 || tier > 8) {
+        res.status(400).send("tier invalid");
+        return;
+    }
+    if (typeof enchantment !== "number" || enchantment < 0 || enchantment > 4) {
+        res.status(400).send("enchantment invalid");
+        return;
+    }
+    if (typeof type !== "string") {
+        res.status(400).send("type invalid");
+        return;
+    }
+    if (typeof silver !== "number") {
+        res.status(400).send("cost invalid");
+        return;
+    }
+    const db = getDB();
+    if (insertTransaction(db, tier, enchantment, type, silver)) {
+        res.status(200).send("OK");
+        return;
+    } else {
+        res.status(500).send("Error");
+        return;
+    }
+});
 
 app.listen(2500, () => {
     const db = getDB();
diff --git a/src/prepare.ts b/src/prepare.ts
deleted file mode 100644
index 7c74838..0000000
--- a/src/prepare.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-import Database from "better-sqlite3";
-
-export default function prepareDB(db: Database.Database) {
-    // setup tiers table
-    db.exec("CREATE TABLE IF NOT EXISTS tiers (tier INTEGER, enchantment INTEGER, PRIMARY KEY(tier, enchantment));");
-    db.exec(`INSERT OR IGNORE INTO tiers (tier, enchantment) VALUES (1,0), (2,0), (3,0),
-        (4,0), (4,1), (4,2), (4,3), (4,4),
-        (5,0), (5,1), (5,2), (5,3), (5,4),
-        (6,0), (6,1), (6,2), (6,3), (6,4),
-        (7,0), (7,1), (7,2), (7,3), (7,4),
-        (8,0), (8,1), (8,2), (8,3), (8,4)`
-    );
-
-    // setup item types table
-    db.exec("CREATE TABLE IF NOT EXISTS types (type TEXT PRIMARY KEY);");
-    db.exec("INSERT OR IGNORE INTO types (type) VALUES ('cloth'), ('leather'), ('bar'), ('block'), ('plank'), ('fee_crafting'), ('fee_market');");
-
-    // create transactions table
-    db.exec("CREATE TABLE IF NOT EXISTS transactions (id INTEGER PRIMARY KEY AUTOINCREMENT, timestamp INTEGER DEFAULT (unixepoch()), tier INT, type TEXT, cost INT, CONSTRAINT fk_tier FOREIGN KEY (tier) REFERENCES tiers(tier), CONSTRAINT fk_type FOREIGN KEY (type) REFERENCES types(type));");
-}
\ No newline at end of file