feat(db): 新增交易流水表 (transactions) 并锁定极致金融精度

src/db/schema.ts

@@ -1,4 +1,4 @@
-import { pgTable, uuid, varchar, timestamp, pgEnum } from "drizzle-orm/pg-core";
+import { pgTable, uuid, varchar, timestamp, pgEnum, numeric } from "drizzle-orm/pg-core";
 
 export const users = pgTable("users", {
   id: uuid("id").primaryKey().defaultRandom(),
@@ -23,3 +23,31 @@ export const assets = pgTable("assets", {
   createdAt: timestamp("created_at", { withTimezone: true, mode: "date" })
     .defaultNow(),
 });
+
+export const transactionTypeEnum = pgEnum("transaction_type_enum", [
+  "BUY",
+  "SELL",
+  "DIVIDEND",
+  "AIRDROP",
+  "FEE",
+]);
+
+export const transactions = pgTable("transactions", {
+  id: uuid("id").primaryKey(),
+  assetId: uuid("asset_id")
+    .notNull()
+    .references(() => assets.id),
+  txType: transactionTypeEnum("tx_type").notNull(),
+  quantity: numeric("quantity", { precision: 36, scale: 18 }).notNull(),
+  price: numeric("price", { precision: 36, scale: 18 }).notNull(),
+  fee: numeric("fee", { precision: 36, scale: 18 })
+    .notNull()
+    .default("0"),
+  txCurrency: varchar("tx_currency", { length: 10 }).notNull(),
+  exchangeRate: numeric("exchange_rate", { precision: 20, scale: 8 })
+    .notNull()
+    .default("1"),
+  executedAt: timestamp("executed_at", { withTimezone: true }).notNull(),
+  createdAt: timestamp("created_at", { withTimezone: true, mode: "date" })
+    .defaultNow(),
+});