LightningLotto/back_end/src/database/schema.sql

-- Lightning Lottery Database Schema
-- PostgreSQL 14+

-- Create UUID extension if not exists
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

-- Lotteries table
CREATE TABLE IF NOT EXISTS lotteries (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    name TEXT NOT NULL,
    status TEXT NOT NULL CHECK (status IN ('active', 'paused', 'finished')),
    ticket_price_sats BIGINT NOT NULL,
    fee_percent INTEGER NOT NULL CHECK (fee_percent >= 0 AND fee_percent <= 100),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Jackpot Cycles table
CREATE TABLE IF NOT EXISTS jackpot_cycles (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    lottery_id UUID NOT NULL REFERENCES lotteries(id),
    cycle_type TEXT NOT NULL CHECK (cycle_type IN ('hourly', 'daily', 'weekly', 'monthly')),
    sequence_number INTEGER NOT NULL,
    scheduled_at TIMESTAMPTZ NOT NULL,
    sales_open_at TIMESTAMPTZ NOT NULL,
    sales_close_at TIMESTAMPTZ NOT NULL,
    status TEXT NOT NULL CHECK (status IN ('scheduled', 'sales_open', 'drawing', 'completed', 'cancelled')),
    pot_total_sats BIGINT NOT NULL DEFAULT 0,
    pot_after_fee_sats BIGINT,
    winning_ticket_id UUID,
    winning_lightning_address TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Users table (optional for Nostr)
CREATE TABLE IF NOT EXISTS users (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    nostr_pubkey TEXT UNIQUE NOT NULL,
    display_name TEXT,
    lightning_address TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Ticket Purchases table
CREATE TABLE IF NOT EXISTS ticket_purchases (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    lottery_id UUID NOT NULL REFERENCES lotteries(id),
    cycle_id UUID NOT NULL REFERENCES jackpot_cycles(id),
    user_id UUID REFERENCES users(id),
    nostr_pubkey TEXT,
    lightning_address TEXT NOT NULL,
    buyer_name TEXT NOT NULL DEFAULT 'Anon',
    number_of_tickets INTEGER NOT NULL,
    ticket_price_sats BIGINT NOT NULL,
    amount_sats BIGINT NOT NULL,
    lnbits_invoice_id TEXT NOT NULL,
    lnbits_payment_hash TEXT NOT NULL,
    invoice_status TEXT NOT NULL CHECK (invoice_status IN ('pending', 'paid', 'expired', 'cancelled')),
    ticket_issue_status TEXT NOT NULL CHECK (ticket_issue_status IN ('not_issued', 'issued')),
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Tickets table
CREATE TABLE IF NOT EXISTS tickets (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    lottery_id UUID NOT NULL REFERENCES lotteries(id),
    cycle_id UUID NOT NULL REFERENCES jackpot_cycles(id),
    ticket_purchase_id UUID NOT NULL REFERENCES ticket_purchases(id),
    user_id UUID REFERENCES users(id),
    lightning_address TEXT NOT NULL,
    serial_number BIGINT NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Payouts table
CREATE TABLE IF NOT EXISTS payouts (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    lottery_id UUID NOT NULL REFERENCES lotteries(id),
    cycle_id UUID NOT NULL REFERENCES jackpot_cycles(id),
    ticket_id UUID NOT NULL REFERENCES tickets(id),
    user_id UUID REFERENCES users(id),
    lightning_address TEXT NOT NULL,
    amount_sats BIGINT NOT NULL,
    status TEXT NOT NULL CHECK (status IN ('pending', 'paid', 'failed')),
    lnbits_payment_id TEXT,
    error_message TEXT,
    retry_count INTEGER NOT NULL DEFAULT 0,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Draw logs table (for audit and transparency)
CREATE TABLE IF NOT EXISTS draw_logs (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    cycle_id UUID NOT NULL REFERENCES jackpot_cycles(id),
    number_of_tickets INTEGER NOT NULL,
    pot_total_sats BIGINT NOT NULL,
    fee_percent INTEGER NOT NULL,
    pot_after_fee_sats BIGINT NOT NULL,
    winner_ticket_id UUID,
    winner_lightning_address TEXT,
    rng_source TEXT NOT NULL,
    selected_index INTEGER,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

-- Indexes for performance
CREATE INDEX IF NOT EXISTS idx_cycles_status_time ON jackpot_cycles(status, scheduled_at);
CREATE INDEX IF NOT EXISTS idx_ticketpurchase_paymenthash ON ticket_purchases(lnbits_payment_hash);
CREATE INDEX IF NOT EXISTS idx_ticketpurchase_cycle ON ticket_purchases(cycle_id);
CREATE INDEX IF NOT EXISTS idx_tickets_cycle ON tickets(cycle_id);
CREATE INDEX IF NOT EXISTS idx_tickets_purchase ON tickets(ticket_purchase_id);
CREATE INDEX IF NOT EXISTS idx_payouts_ticket ON payouts(ticket_id);
CREATE INDEX IF NOT EXISTS idx_payouts_status ON payouts(status);
CREATE INDEX IF NOT EXISTS idx_users_pubkey ON users(nostr_pubkey);

-- Add foreign key constraint for winning ticket (after tickets table exists)
ALTER TABLE jackpot_cycles ADD CONSTRAINT fk_winning_ticket 
    FOREIGN KEY (winning_ticket_id) REFERENCES tickets(id) ON DELETE SET NULL;

ALTER TABLE ticket_purchases 
    ADD COLUMN IF NOT EXISTS buyer_name TEXT NOT NULL DEFAULT 'Anon';

-- Insert default lottery
INSERT INTO lotteries (name, status, ticket_price_sats, fee_percent)
VALUES ('Main Lightning Jackpot', 'active', 1000, 5)
ON CONFLICT DO NOTHING;