postgresql & migrations

internal/repository/postgresql/migrations/000001_init.down.sql

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+drop table if exists alert;
+drop table if exists instrument;
+drop table if exists currency;
+drop table if exists users;

internal/repository/postgresql/migrations/000001_init.up.sql

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+create table if not exists users (
+  id uuid primary key not null default gen_random_uuid(),
+  telegram_id bigint not null UNIQUE
+);
+
+create table if not exists currency (
+  id serial primary key not null,
+  symbol text not null UNIQUE
+  -- decimals integer not null
+);
+
+create table if not exists instrument (
+  id uuid primary key not null default gen_random_uuid(),
+  base_currency_id integer references currency(id) not null,
+  quoted_currency_id integer references currency(id) not null,
+  CHECK (base_currency_id <> quoted_currency_id),
+  UNIQUE (base_currency_id, quoted_currency_id)
+);
+
+create table if not exists alert (
+  id uuid primary key not null default gen_random_uuid(),
+  instrument_id uuid references instrument(id) not null,
+  price text not null,
+  active bool not null default true
+);
+
+insert into currency(symbol) values ('USDT'), ('BTC'), ('ETH'), ('SOL');
+
+insert into instrument (base_currency_id, quoted_currency_id) values
+  ((select id from currency where symbol = 'BTC'), (select id from currency where symbol = 'USDT')),
+  ((select id from currency where symbol = 'ETH'), (select id from currency where symbol = 'USDT')),
+  ((select id from currency where symbol = 'SOL'), (select id from currency where symbol = 'USDT'));

internal/repository/postgresql/migrations/embed.go

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+package migrations
+
+import (
+	"embed"
+)
+
+//go:embed *.sql
+var Folder embed.FS