Add notification platform setup guides to README

Made-with: Cursor

README.md

@@ -144,7 +144,82 @@ To receive alerts via Telegram, you need to create a bot and get your chat ID.
 
 ---
 
-*Guides for Discord, Slack, and Email coming soon.*
+### Discord
+
+To receive alerts in a Discord channel, you need to create a webhook.
+
+#### 1. Create a Discord Webhook
+
+1. Open **Discord** and navigate to the server where you want to receive alerts.
+2. Go to the channel you want alerts posted in (or create a new one, e.g. `#koin-alerts`).
+3. Click the **gear icon** next to the channel name to open **Channel Settings**.
+4. Go to **Integrations** > **Webhooks**.
+5. Click **New Webhook**.
+6. Give it a name (e.g. `Koin Ping`) and click **Copy Webhook URL**.
+
+   The URL will look like: `https://discord.com/api/webhooks/123456789/AbCdEfGhIjKl...`
+
+#### 2. Save in Koin Ping
+
+1. Go to the **Alerts** page in Koin Ping.
+2. In the **Notification Settings** panel, find the **Discord** section.
+3. Paste your **Webhook URL** into the field.
+4. Click **Save Settings**.
+5. Click **Test All Channels** to verify — you should see a test message appear in your Discord channel.
+
+---
+
+### Slack
+
+To receive alerts in a Slack channel, you need to create an Incoming Webhook.
+
+#### 1. Create a Slack App with Incoming Webhooks
+
+1. Go to [https://api.slack.com/apps](https://api.slack.com/apps) and click **Create New App**.
+2. Choose **From scratch**, give it a name (e.g. `Koin Ping`), and select your workspace.
+3. In the app settings, go to **Incoming Webhooks** in the left sidebar.
+4. Toggle **Activate Incoming Webhooks** to **On**.
+5. Click **Add New Webhook to Workspace**.
+6. Select the channel where you want alerts posted (e.g. `#koin-alerts`) and click **Allow**.
+7. Copy the **Webhook URL** — it will start with `https://hooks.slack.com/services/...`
+
+#### 2. Save in Koin Ping
+
+1. Go to the **Alerts** page in Koin Ping.
+2. In the **Notification Settings** panel, find the **Slack** section.
+3. Paste your **Webhook URL** into the field.
+4. Click **Save Settings**.
+5. Click **Test All Channels** to verify — you should see a test message appear in your Slack channel.
+
+---
+
+### Email
+
+Koin Ping sends email alerts and digests via [Resend](https://resend.com). To enable email notifications, the application owner must configure a Resend account and verified sending domain.
+
+#### For Application Owners (Deployment Setup)
+
+1. Create an account at [resend.com](https://resend.com).
+2. Go to [resend.com/domains](https://resend.com/domains) and add your sending domain.
+3. Add the DNS records Resend provides (SPF, DKIM, etc.) to your domain's DNS settings.
+4. Once verified, create an API key at [resend.com/api-keys](https://resend.com/api-keys).
+5. Set the following in your `.env` file:
+
+   ```
+   RESEND_API_KEY=re_your_api_key_here
+   EMAIL_FROM=Your App <alerts@yourdomain.com>
+   ```
+
+6. Restart the API server and poller to pick up the changes.
+
+#### For Users
+
+1. Go to the **Alerts** page in Koin Ping.
+2. In the **Notification Settings** panel, find the **Email** section.
+3. Enter the email address where you want to receive alerts.
+4. Click **Save Settings**.
+5. Click **Verify Email** to receive a confirmation message.
+6. Click **Test All Channels** to verify — you should receive a test alert at your email address.
 
 ## License
 

backend-go/internal/database/postgres.go

@@ -1,3 +1,4 @@
+// Package database manages PostgreSQL connection pools.
 package database
 
 import (
@@ -10,21 +11,21 @@ import (
 )
 
 const (
-
+	// maxConnIdleSeconds is the maximum idle time for a connection.
 	maxConnIdleSeconds = 30
-
+	// maxConnLifetimeMinutes is the maximum lifetime for a connection.
 	maxConnLifetimeMinutes = 5
-
+	// connectTimeoutSeconds is the timeout for initial connection.
 	connectTimeoutSeconds = 10
-
+	// maxConns is the maximum number of connections in the pool.
 	maxConns = 20
-
+	// minConns is the minimum number of connections in the pool.
 	minConns = 2
 )
 
 var pool *pgxpool.Pool //nolint:gochecknoglobals
 
-// establishPostgreSQL connection pool using the given DSN.
+// Connect establishes a PostgreSQL connection pool using the given DSN.
 func Connect(dsn string) (*pgxpool.Pool, error) {
 	cfg, err := pgxpool.ParseConfig(dsn)
 	if err != nil {
@@ -56,10 +57,12 @@ func Connect(dsn string) (*pgxpool.Pool, error) {
 	return p, nil
 }
 
+// Pool returns the global connection pool.
 func Pool() *pgxpool.Pool {
 	return pool
 }
 
+// Close closes the global connection pool.
 func Close() {
 	if pool != nil {
 		pool.Close()

backend-go/internal/domain/types.go

@@ -1,7 +1,9 @@
+// Package domain defines core domain types shared across the application.
 package domain
 
 import "time"
 
+// Address represents a tracked Ethereum address.
 type Address struct {
 	ID        int       `json:"id"`
 	UserID    string    `json:"user_id"`    //nolint:tagliatelle
@@ -10,10 +12,13 @@ type Address struct {
 	CreatedAt time.Time `json:"created_at"` //nolint:tagliatelle
 }
 
+// AlertType identifies the kind of alert rule.
 type AlertType string
 
+// String implements fmt.Stringer.
 func (a AlertType) String() string { return string(a) }
 
+// Alert type constants define the supported alert triggers.
 const (
 	AlertIncomingTx    AlertType = "incoming_tx"
 	AlertOutgoingTx    AlertType = "outgoing_tx"
@@ -21,6 +26,7 @@ const (
 	AlertBalanceBelow  AlertType = "balance_below"
 )
 
+// ValidAlertTypes lists all alert types accepted by the API.
 var ValidAlertTypes = []AlertType{ //nolint:gochecknoglobals
 	AlertIncomingTx,
 	AlertOutgoingTx,
@@ -56,6 +62,7 @@ func IsThresholdRequired(t AlertType) bool {
 	return false
 }
 
+// AlertRule represents a user-defined alert rule for an address.
 type AlertRule struct {
 	ID        int       `json:"id"`
 	AddressID int       `json:"address_id"` //nolint:tagliatelle
@@ -65,6 +72,7 @@ type AlertRule struct {
 	CreatedAt time.Time `json:"created_at"` //nolint:tagliatelle
 }
 
+// AlertEvent represents a fired alert event stored for history.
 type AlertEvent struct {
 	ID           int       `json:"id"`
 	AlertRuleID  int       `json:"alert_rule_id"`   //nolint:tagliatelle
@@ -74,6 +82,7 @@ type AlertEvent struct {
 	Timestamp    time.Time `json:"timestamp"`
 }
 
+// AddressCheckpoint tracks the last block checked for an address.
 type AddressCheckpoint struct {
 	AddressID        int       `json:"address_id"`         //nolint:tagliatelle
 	LastCheckedBlock int       `json:"last_checked_block"` //nolint:tagliatelle
@@ -112,16 +121,19 @@ type NormalizedTx struct {
 	BlockTimestamp int64   `json:"block_timestamp"` //nolint:tagliatelle
 }
 
+// Direction indicates whether a transaction is incoming or outgoing.
 type Direction string
 
 // String implements fmt.Stringer.
 func (d Direction) String() string { return string(d) }
 
+// Direction constants indicate the flow of a transaction relative to a watched address.
 const (
 	DirectionIncoming Direction = "incoming"
 	DirectionOutgoing Direction = "outgoing"
 )
 
+// ObservedTx is a NormalizedTx enriched with address and direction context.
 type ObservedTx struct {
 	NormalizedTx
 	AddressID int       `json:"address_id"` //nolint:tagliatelle

backend-go/internal/firebase/admin.go

@@ -1,3 +1,4 @@
+// Package firebase provides Firebase authentication integration.
 package firebase
 
 import (
@@ -16,6 +17,7 @@ var ( //nolint:gochecknoglobals
 	errInit    error        //nolint:gochecknoglobals
 )
 
+// Init initializes the Firebase app and auth client using the given project ID.
 func Init(projectID string) error {
 	once.Do(func() {
 		ctx := context.Background()
@@ -46,6 +48,7 @@ func Init(projectID string) error {
 	return errInit
 }
 
+// Auth returns the initialized Firebase auth client.
 func Auth() *auth.Client {
 	return authClient
 }

backend-go/internal/handlers/address.go

@@ -15,14 +15,17 @@ import (
 
 var ethAddressRe = regexp.MustCompile(`^0x[a-fA-F0-9]{40}$`)
 
+// AddressHandler handles HTTP requests for address management.
 type AddressHandler struct {
 	addresses *models.AddressModel
 }
 
+// NewAddressHandler creates a new AddressHandler.
 func NewAddressHandler(addresses *models.AddressModel) *AddressHandler {
 	return &AddressHandler{addresses: addresses}
 }
 
+// Create handles POST requests to add a new tracked address.
 func (h *AddressHandler) Create(w http.ResponseWriter, r *http.Request) {
 	userID := middleware.GetUserID(r.Context())
 
@@ -89,7 +92,7 @@ func (h *AddressHandler) List(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, addresses)
 }
 
-//  handles PATCH requests to update an address label.
+// UpdateLabel handles PATCH requests to update an address label.
 func (h *AddressHandler) UpdateLabel(w http.ResponseWriter, r *http.Request) {
 	userID := middleware.GetUserID(r.Context())
 	addressID, ok := parseIntParam(r.PathValue("addressId"))

backend-go/internal/handlers/alert_rule.go

@@ -14,17 +14,21 @@ import (
 	"github.com/kjannette/koin-ping/backend-go/internal/models"
 )
 
+// errThresholdFormat is returned when the threshold JSON cannot be decoded.
 var errThresholdFormat = errors.New("unsupported threshold format")
 
+// AlertRuleHandler handles HTTP requests for alert rule management.
 type AlertRuleHandler struct {
 	alertRules *models.AlertRuleModel
 	addresses  *models.AddressModel
 }
 
+// NewAlertRuleHandler creates a new AlertRuleHandler.
 func NewAlertRuleHandler(alertRules *models.AlertRuleModel, addresses *models.AddressModel) *AlertRuleHandler {
 	return &AlertRuleHandler{alertRules: alertRules, addresses: addresses}
 }
 
+// Create handles POST requests to create a new alert rule for an address.
 func (h *AlertRuleHandler) Create(w http.ResponseWriter, r *http.Request) {
 	userID := middleware.GetUserID(r.Context())
 	addressID, ok := parseIntParam(r.PathValue("addressId"))

frontend/src/App.jsx

@@ -3,7 +3,6 @@ import { useAuth } from "./contexts/AuthContext";
 import Navbar from "./components/Navbar";
 import Login from "./pages/Login";
 import Signup from "./pages/Signup";
-import Onboarding from "./pages/Onboarding";
 import Addresses from "./pages/Addresses";
 import Alerts from "./pages/Alerts";
 import AlertHistory from "./pages/AlertHistory";
@@ -16,7 +15,6 @@ export default function App() {
             <Routes>
                 <Route path="/login" element={<Login />} />
                 <Route path="/signup" element={<Signup />} />
-                <Route path="/onboarding" element={<Onboarding />} />
                 <Route path="*" element={<Navigate to="/login" />} />
             </Routes>
         );
@@ -30,7 +28,6 @@ export default function App() {
                 <Route path="/addresses" element={<Addresses />} />
                 <Route path="/alerts" element={<Alerts />} />
                 <Route path="/history" element={<AlertHistory />} />
-                <Route path="/onboarding" element={<Onboarding />} />
                 <Route path="*" element={<Navigate to="/addresses" />} />
             </Routes>
         </div>

frontend/src/pages/Onboarding.jsx

@@ -1,834 +0,0 @@
-/**
- * Onboarding Wizard
- *
- * 5-step guided flow: Create Account → Add Wallet → Alert Rules → Notifications → Done
- */
-
-import { useState, useEffect } from "react";
-import { useNavigate } from "react-router-dom";
-import { useAuth } from "../contexts/AuthContext";
-import { createAddress, getAddresses } from "../api/addresses";
-import { createAlert } from "../api/alerts";
-import {
-    updateNotificationConfig,
-    testNotificationChannels,
-} from "../api/notificationConfig";
-
-const STEPS = [
-    "Create Account",
-    "Add Wallet",
-    "Alert Rules",
-    "Notifications",
-    "Done",
-];
-
-const inputStyle = {
-    width: "100%",
-    padding: "0.5rem",
-    fontSize: "1rem",
-    backgroundColor: "#2a2a2a",
-    border: "1px solid #444",
-    borderRadius: "4px",
-    color: "white",
-    boxSizing: "border-box",
-};
-
-const labelStyle = {
-    display: "block",
-    marginBottom: "0.4rem",
-    color: "#ccc",
-    fontSize: "0.9rem",
-};
-
-export default function Onboarding() {
-    const { currentUser, signup } = useAuth();
-    const navigate = useNavigate();
-
-    const [step, setStep] = useState(1);
-    const [loading, setLoading] = useState(false);
-    const [error, setError] = useState("");
-    const [skipWarning, setSkipWarning] = useState("");
-    const [testResults, setTestResults] = useState(null);
-    const [testLoading, setTestLoading] = useState(false);
-
-    // Wizard state
-    const [data, setData] = useState({
-        email: "",
-        password: "",
-        confirmPassword: "",
-        walletAddress: "",
-        walletLabel: "",
-        createdAddressId: null,
-        alertIncomingTx: false,
-        alertOutgoingTx: false,
-        alertLargeTransfer: false,
-        largeTransferThreshold: "",
-        alertBalanceBelow: false,
-        balanceBelowThreshold: "",
-        discordWebhookUrl: "",
-        slackWebhookUrl: "",
-        notificationEmail: "",
-        // summary
-        alertsCreated: [],
-        notificationConfigured: false,
-    });
-
-    function set(field, value) {
-        setData((prev) => ({ ...prev, [field]: value }));
-    }
-
-    // On mount: if already fully onboarded, redirect away
-    useEffect(() => {
-        if (!currentUser) return;
-        getAddresses()
-            .then((addresses) => {
-                if (addresses.length > 0) {
-                    navigate("/addresses", { replace: true });
-                }
-            })
-            .catch(() => {}); // ignore errors (e.g. mid-signup)
-    }, [currentUser, navigate]);
-
-    // ── Step handlers ─────────────────────────────────────────────────────────
-
-    async function handleStep1() {
-        setError("");
-        if (!data.email || !data.password || !data.confirmPassword) {
-            setError("Please fill in all fields");
-            return;
-        }
-        if (data.password !== data.confirmPassword) {
-            setError("Passwords do not match");
-            return;
-        }
-        if (data.password.length < 6) {
-            setError("Password must be at least 6 characters");
-            return;
-        }
-        // If user already exists (browser-close-mid-wizard), skip signup
-        if (!currentUser) {
-            try {
-                setLoading(true);
-                await signup(data.email, data.password);
-            } catch (err) {
-                if (err.code === "auth/email-already-in-use") {
-                    setError("Email already in use. Try logging in instead.");
-                } else if (err.code === "auth/invalid-email") {
-                    setError("Invalid email address");
-                } else if (err.code === "auth/weak-password") {
-                    setError("Password is too weak");
-                } else {
-                    setError("Failed to create account: " + err.message);
-                }
-                setLoading(false);
-                return;
-            } finally {
-                setLoading(false);
-            }
-        }
-        setStep(2);
-    }
-
-    async function handleStep2() {
-        setError("");
-        if (!data.walletAddress) {
-            setError("Please enter a wallet address");
-            return;
-        }
-        if (!/^0x[0-9a-fA-F]{40}$/.test(data.walletAddress)) {
-            setError("Invalid ETH address (must be 0x followed by 40 hex characters)");
-            return;
-        }
-        try {
-            setLoading(true);
-            const created = await createAddress({
-                address: data.walletAddress,
-                label: data.walletLabel || undefined,
-            });
-            set("createdAddressId", created.id);
-            setStep(3);
-        } catch (err) {
-            setError(err.message);
-        } finally {
-            setLoading(false);
-        }
-    }
-
-    async function handleStep3() {
-        setError("");
-        const rules = [];
-        if (data.alertIncomingTx) rules.push({ type: "incoming_tx" });
-        if (data.alertOutgoingTx) rules.push({ type: "outgoing_tx" });
-        if (data.alertLargeTransfer) {
-            if (!data.largeTransferThreshold) {
-                setError("Please enter a threshold for large transfers");
-                return;
-            }
-            rules.push({ type: "large_transfer", threshold: data.largeTransferThreshold });
-        }
-        if (data.alertBalanceBelow) {
-            if (!data.balanceBelowThreshold) {
-                setError("Please enter a threshold for balance below");
-                return;
-            }
-            rules.push({ type: "balance_below", threshold: data.balanceBelowThreshold });
-        }
-
-        if (rules.length === 0) {
-            setStep(4);
-            return;
-        }
-
-        try {
-            setLoading(true);
-            const created = [];
-            for (const rule of rules) {
-                const result = await createAlert(data.createdAddressId, rule);
-                created.push(result);
-            }
-            set("alertsCreated", created);
-            setStep(4);
-        } catch (err) {
-            setError(err.message);
-        } finally {
-            setLoading(false);
-        }
-    }
-
-    async function handleStep4() {
-        setError("");
-        const hasAny =
-            data.discordWebhookUrl || data.slackWebhookUrl || data.notificationEmail;
-        if (!hasAny) {
-            setStep(5);
-            return;
-        }
-        try {
-            setLoading(true);
-            await updateNotificationConfig({
-                notification_enabled: true,
-                discord_webhook_url: data.discordWebhookUrl || undefined,
-                slack_webhook_url: data.slackWebhookUrl || undefined,
-                email: data.notificationEmail || undefined,
-            });
-            set("notificationConfigured", true);
-            setStep(5);
-        } catch (err) {
-            setError(err.message);
-        } finally {
-            setLoading(false);
-        }
-    }
-
-    async function handleTestChannels() {
-        setTestLoading(true);
-        setTestResults(null);
-        try {
-            const results = await testNotificationChannels();
-            setTestResults(results);
-        } catch (err) {
-            setTestResults({ error: err.message });
-        } finally {
-            setTestLoading(false);
-        }
-    }
-
-    // ── Progress bar ──────────────────────────────────────────────────────────
-
-    function ProgressBar() {
-        return (
-            <div
-                style={{
-                    display: "flex",
-                    alignItems: "center",
-                    justifyContent: "center",
-                    marginBottom: "2rem",
-                }}
-            >
-                {STEPS.map((label, i) => {
-                    const stepNum = i + 1;
-                    const done = step > stepNum;
-                    const active = step === stepNum;
-                    return (
-                        <div
-                            key={label}
-                            style={{ display: "flex", alignItems: "center" }}
-                        >
-                            {i > 0 && (
-                                <div
-                                    style={{
-                                        width: "40px",
-                                        height: "2px",
-                                        backgroundColor: done || active ? "#0066cc" : "#444",
-                                        margin: "0 4px",
-                                    }}
-                                />
-                            )}
-                            <div style={{ textAlign: "center" }}>
-                                <div
-                                    style={{
-                                        width: "32px",
-                                        height: "32px",
-                                        borderRadius: "50%",
-                                        backgroundColor:
-                                            done ? "#0066cc" : active ? "#0066cc" : "#333",
-                                        border: active ? "2px solid #4499ff" : "2px solid transparent",
-                                        display: "flex",
-                                        alignItems: "center",
-                                        justifyContent: "center",
-                                        fontWeight: "bold",
-                                        fontSize: "0.85rem",
-                                        color: "white",
-                                        margin: "0 auto 4px",
-                                    }}
-                                >
-                                    {done ? "✓" : stepNum}
-                                </div>
-                                <div
-                                    style={{
-                                        fontSize: "0.7rem",
-                                        color: active ? "white" : "#888",
-                                        whiteSpace: "nowrap",
-                                    }}
-                                >
-                                    {label}
-                                </div>
-                            </div>
-                        </div>
-                    );
-                })}
-            </div>
-        );
-    }
-
-    // ── Step content ──────────────────────────────────────────────────────────
-
-    function Step1() {
-        return (
-            <>
-                <h2 style={{ marginBottom: "1.5rem" }}>Create your account</h2>
-                <div style={{ marginBottom: "1rem" }}>
-                    <label style={labelStyle}>Email</label>
-                    <input
-                        type="email"
-                        value={data.email}
-                        onChange={(e) => set("email", e.target.value)}
-                        disabled={loading}
-                        style={inputStyle}
-                        placeholder="you@example.com"
-                    />
-                </div>
-                <div style={{ marginBottom: "1rem" }}>
-                    <label style={labelStyle}>Password</label>
-                    <input
-                        type="password"
-                        value={data.password}
-                        onChange={(e) => set("password", e.target.value)}
-                        disabled={loading}
-                        style={inputStyle}
-                        placeholder="At least 6 characters"
-                    />
-                </div>
-                <div style={{ marginBottom: "1.5rem" }}>
-                    <label style={labelStyle}>Confirm Password</label>
-                    <input
-                        type="password"
-                        value={data.confirmPassword}
-                        onChange={(e) => set("confirmPassword", e.target.value)}
-                        disabled={loading}
-                        style={inputStyle}
-                        placeholder="Repeat your password"
-                    />
-                </div>
-            </>
-        );
-    }
-
-    function Step2() {
-        return (
-            <>
-                <h2 style={{ marginBottom: "0.5rem" }}>Add a wallet address</h2>
-                <p style={{ color: "#aaa", marginBottom: "1.5rem", fontSize: "0.9rem" }}>
-                    Enter the Ethereum address you want to monitor.
-                </p>
-                <div style={{ marginBottom: "1rem" }}>
-                    <label style={labelStyle}>ETH Address</label>
-                    <input
-                        type="text"
-                        value={data.walletAddress}
-                        onChange={(e) => set("walletAddress", e.target.value)}
-                        disabled={loading}
-                        style={inputStyle}
-                        placeholder="0x..."
-                    />
-                </div>
-                <div style={{ marginBottom: "1.5rem" }}>
-                    <label style={labelStyle}>Label (optional)</label>
-                    <input
-                        type="text"
-                        value={data.walletLabel}
-                        onChange={(e) => set("walletLabel", e.target.value)}
-                        disabled={loading}
-                        style={inputStyle}
-                        placeholder="e.g. My main wallet"
-                    />
-                </div>
-            </>
-        );
-    }
-
-    function Step3() {
-        return (
-            <>
-                <h2 style={{ marginBottom: "0.5rem" }}>Configure alert rules</h2>
-                <p style={{ color: "#aaa", marginBottom: "1.5rem", fontSize: "0.9rem" }}>
-                    Choose which events trigger notifications. You can change these later.
-                </p>
-
-                <CheckboxRow
-                    checked={data.alertIncomingTx}
-                    onChange={(v) => set("alertIncomingTx", v)}
-                    label="Incoming transaction"
-                />
-                <CheckboxRow
-                    checked={data.alertOutgoingTx}
-                    onChange={(v) => set("alertOutgoingTx", v)}
-                    label="Outgoing transaction"
-                />
-                <CheckboxRow
-                    checked={data.alertLargeTransfer}
-                    onChange={(v) => set("alertLargeTransfer", v)}
-                    label="Large transfer"
-                >
-                    {data.alertLargeTransfer && (
-                        <div style={{ marginTop: "0.5rem", marginLeft: "1.75rem" }}>
-                            <input
-                                type="number"
-                                value={data.largeTransferThreshold}
-                                onChange={(e) => set("largeTransferThreshold", e.target.value)}
-                                style={{ ...inputStyle, width: "160px" }}
-                                placeholder="Threshold (ETH)"
-                                min="0"
-                                step="0.01"
-                            />
-                        </div>
-                    )}
-                </CheckboxRow>
-                <CheckboxRow
-                    checked={data.alertBalanceBelow}
-                    onChange={(v) => set("alertBalanceBelow", v)}
-                    label="Balance below"
-                >
-                    {data.alertBalanceBelow && (
-                        <div style={{ marginTop: "0.5rem", marginLeft: "1.75rem" }}>
-                            <input
-                                type="number"
-                                value={data.balanceBelowThreshold}
-                                onChange={(e) => set("balanceBelowThreshold", e.target.value)}
-                                style={{ ...inputStyle, width: "160px" }}
-                                placeholder="Threshold (ETH)"
-                                min="0"
-                                step="0.01"
-                            />
-                        </div>
-                    )}
-                </CheckboxRow>
-            </>
-        );
-    }
-
-    function Step4() {
-        return (
-            <>
-                <h2 style={{ marginBottom: "0.5rem" }}>Set up notifications</h2>
-                <p style={{ color: "#aaa", marginBottom: "1.5rem", fontSize: "0.9rem" }}>
-                    Add at least one channel so you receive alerts. All fields are optional.
-                </p>
-
-                <div style={{ marginBottom: "1.25rem" }}>
-                    <label style={labelStyle}>
-                        Discord Webhook URL{" "}
-                        <a
-                            href="https://support.discord.com/hc/en-us/articles/228383668"
-                            target="_blank"
-                            rel="noreferrer"
-                            style={{ color: "#4499ff", fontSize: "0.8rem" }}
-                        >
-                            (how to get one)
-                        </a>
-                    </label>
-                    <input
-                        type="url"
-                        value={data.discordWebhookUrl}
-                        onChange={(e) => set("discordWebhookUrl", e.target.value)}
-                        disabled={loading}
-                        style={inputStyle}
-                        placeholder="https://discord.com/api/webhooks/..."
-                    />
-                </div>
-
-                <div style={{ marginBottom: "1.25rem" }}>
-                    <label style={labelStyle}>
-                        Slack Webhook URL{" "}
-                        <a
-                            href="https://api.slack.com/messaging/webhooks"
-                            target="_blank"
-                            rel="noreferrer"
-                            style={{ color: "#4499ff", fontSize: "0.8rem" }}
-                        >
-                            (how to get one)
-                        </a>
-                    </label>
-                    <input
-                        type="url"
-                        value={data.slackWebhookUrl}
-                        onChange={(e) => set("slackWebhookUrl", e.target.value)}
-                        disabled={loading}
-                        style={inputStyle}
-                        placeholder="https://hooks.slack.com/services/..."
-                    />
-                </div>
-
-                <div style={{ marginBottom: "1.5rem" }}>
-                    <label style={labelStyle}>Email address for alerts</label>
-                    <input
-                        type="email"
-                        value={data.notificationEmail}
-                        onChange={(e) => set("notificationEmail", e.target.value)}
-                        disabled={loading}
-                        style={inputStyle}
-                        placeholder="you@example.com"
-                    />
-                </div>
-            </>
-        );
-    }
-
-    function Step5() {
-        const alertCount = data.alertsCreated.length;
-        const hasNotif = data.notificationConfigured;
-
-        return (
-            <>
-                <h2 style={{ marginBottom: "1rem" }}>You're all set!</h2>
-
-                <div
-                    style={{
-                        backgroundColor: "#1e2e1e",
-                        border: "1px solid #2d5a2d",
-                        borderRadius: "6px",
-                        padding: "1rem 1.25rem",
-                        marginBottom: "1.5rem",
-                    }}
-                >
-                    <p style={{ margin: "0 0 0.5rem", color: "#90ee90", fontWeight: "bold" }}>
-                        Summary
-                    </p>
-                    <ul style={{ margin: 0, paddingLeft: "1.25rem", color: "#ccc", lineHeight: "1.8" }}>
-                        <li>
-                            Wallet address added:{" "}
-                            <span style={{ color: "white", fontFamily: "monospace", fontSize: "0.85rem" }}>
-                                {data.walletAddress}
-                            </span>
-                            {data.walletLabel && ` (${data.walletLabel})`}
-                        </li>
-                        <li>
-                            Alert rules configured:{" "}
-                            <span style={{ color: "white" }}>
-                                {alertCount > 0 ? `${alertCount} rule${alertCount !== 1 ? "s" : ""}` : "None (skipped)"}
-                            </span>
-                        </li>
-                        <li>
-                            Notification channels:{" "}
-                            <span style={{ color: "white" }}>
-                                {hasNotif ? "Configured" : "Not set up (skipped)"}
-                            </span>
-                        </li>
-                    </ul>
-                </div>
-
-                {hasNotif && (
-                    <div style={{ marginBottom: "1.5rem" }}>
-                        <button
-                            onClick={handleTestChannels}
-                            disabled={testLoading}
-                            style={{
-                                padding: "0.6rem 1.25rem",
-                                backgroundColor: testLoading ? "#333" : "#1a4d80",
-                                color: "white",
-                                border: "1px solid #0066cc",
-                                borderRadius: "4px",
-                                cursor: testLoading ? "not-allowed" : "pointer",
-                                fontSize: "0.9rem",
-                            }}
-                        >
-                            {testLoading ? "Testing..." : "Test All Channels"}
-                        </button>
-
-                        {testResults && (
-                            <div style={{ marginTop: "0.75rem" }}>
-                                {testResults.error ? (
-                                    <p style={{ color: "#ff6666" }}>{testResults.error}</p>
-                                ) : (
-                                    <ul style={{ listStyle: "none", padding: 0, margin: 0 }}>
-                                        {Object.entries(testResults).map(([channel, result]) => (
-                                            <li
-                                                key={channel}
-                                                style={{
-                                                    color: result.success ? "#90ee90" : "#ff6666",
-                                                    fontSize: "0.9rem",
-                                                    marginBottom: "0.25rem",
-                                                }}
-                                            >
-                                                {result.success ? "✓" : "✗"} {channel}:{" "}
-                                                {result.message || (result.success ? "OK" : "Failed")}
-                                            </li>
-                                        ))}
-                                    </ul>
-                                )}
-                            </div>
-                        )}
-                    </div>
-                )}
-
-                <button
-                    onClick={() => navigate("/addresses")}
-                    style={{
-                        padding: "0.75rem 2rem",
-                        backgroundColor: "#0066cc",
-                        color: "white",
-                        border: "none",
-                        borderRadius: "4px",
-                        cursor: "pointer",
-                        fontSize: "1rem",
-                        fontWeight: "bold",
-                    }}
-                >
-                    Go to Dashboard →
-                </button>
-            </>
-        );
-    }
-
-    // ── Shared helpers ────────────────────────────────────────────────────────
-
-    function CheckboxRow({ checked, onChange, label, children }) {
-        return (
-            <div style={{ marginBottom: "1rem" }}>
-                <label
-                    style={{
-                        display: "flex",
-                        alignItems: "center",
-                        gap: "0.6rem",
-                        cursor: "pointer",
-                        color: "#ddd",
-                    }}
-                >
-                    <input
-                        type="checkbox"
-                        checked={checked}
-                        onChange={(e) => onChange(e.target.checked)}
-                        style={{ width: "16px", height: "16px", accentColor: "#0066cc" }}
-                    />
-                    {label}
-                </label>
-                {children}
-            </div>
-        );
-    }
-
-    // ── Footer navigation ─────────────────────────────────────────────────────
-
-    function Footer() {
-        if (step === 5) return null;
-
-        const canSkip = step === 3 || step === 4;
-        const canBack = step > 1;
-
-        async function handleNext() {
-            setSkipWarning("");
-            if (step === 1) await handleStep1();
-            else if (step === 2) await handleStep2();
-            else if (step === 3) await handleStep3();
-            else if (step === 4) await handleStep4();
-        }
-
-        function handleSkip() {
-            setError("");
-            setSkipWarning("");
-            setStep((s) => s + 1);
-        }
-
-        function handleBack() {
-            setError("");
-            setSkipWarning("");
-            setStep((s) => s - 1);
-        }
-
-        return (
-            <div
-                style={{
-                    display: "flex",
-                    justifyContent: "space-between",
-                    alignItems: "center",
-                    marginTop: "1.5rem",
-                    paddingTop: "1rem",
-                    borderTop: "1px solid #333",
-                }}
-            >
-                <div>
-                    {canBack && (
-                        <button
-                            onClick={handleBack}
-                            disabled={loading}
-                            style={{
-                                padding: "0.5rem 1rem",
-                                backgroundColor: "transparent",
-                                color: "#aaa",
-                                border: "1px solid #444",
-                                borderRadius: "4px",
-                                cursor: loading ? "not-allowed" : "pointer",
-                            }}
-                        >
-                            ← Back
-                        </button>
-                    )}
-                </div>
-
-                <div style={{ display: "flex", gap: "0.75rem" }}>
-                    {canSkip && (
-                        <button
-                            onClick={handleSkip}
-                            disabled={loading}
-                            style={{
-                                padding: "0.5rem 1rem",
-                                backgroundColor: "transparent",
-                                color: "#aaa",
-                                border: "1px solid #444",
-                                borderRadius: "4px",
-                                cursor: loading ? "not-allowed" : "pointer",
-                            }}
-                        >
-                            Skip for now
-                        </button>
-                    )}
-                    <button
-                        onClick={handleNext}
-                        disabled={loading}
-                        style={{
-                            padding: "0.5rem 1.25rem",
-                            backgroundColor: loading ? "#333" : "#0066cc",
-                            color: "white",
-                            border: "none",
-                            borderRadius: "4px",
-                            cursor: loading ? "not-allowed" : "pointer",
-                            fontWeight: "bold",
-                        }}
-                    >
-                        {loading ? "Please wait..." : step === 4 ? "Finish" : "Next →"}
-                    </button>
-                </div>
-            </div>
-        );
-    }
-
-    // ── Render ────────────────────────────────────────────────────────────────
-
-    const stepContent = {
-        1: <Step1 />,
-        2: <Step2 />,
-        3: <Step3 />,
-        4: <Step4 />,
-        5: <Step5 />,
-    };
-
-    return (
-        <div
-            style={{
-                minHeight: "100vh",
-                backgroundColor: "#1a1a1a",
-                display: "flex",
-                flexDirection: "column",
-                alignItems: "center",
-                justifyContent: "flex-start",
-                paddingTop: "3rem",
-                paddingBottom: "3rem",
-            }}
-        >
-            <div style={{ width: "100%", maxWidth: "540px", padding: "0 1rem" }}>
-                <h1
-                    style={{
-                        textAlign: "center",
-                        marginBottom: "2rem",
-                        color: "#0066cc",
-                        letterSpacing: "0.5px",
-                    }}
-                >
-                    Koin Ping
-                </h1>
-
-                <ProgressBar />
-
-                {error && (
-                    <div
-                        style={{
-                            padding: "0.75rem 1rem",
-                            marginBottom: "1rem",
-                            backgroundColor: "#3a1a1a",
-                            border: "1px solid #cc3333",
-                            borderRadius: "4px",
-                            color: "#ff6666",
-                            fontSize: "0.9rem",
-                        }}
-                    >
-                        {error}
-                    </div>
-                )}
-
-                {skipWarning && (
-                    <div
-                        style={{
-                            padding: "0.75rem 1rem",
-                            marginBottom: "1rem",
-                            backgroundColor: "#3a2e00",
-                            border: "1px solid #aa7700",
-                            borderRadius: "4px",
-                            color: "#ffcc44",
-                            fontSize: "0.9rem",
-                        }}
-                    >
-                        {skipWarning}
-                    </div>
-                )}
-
-                <div
-                    style={{
-                        backgroundColor: "#242424",
-                        border: "1px solid #333",
-                        borderRadius: "8px",
-                        padding: "2rem",
-                    }}
-                >
-                    {stepContent[step]}
-                    <Footer />
-                </div>
-
-                {step === 1 && (
-                    <p
-                        style={{
-                            textAlign: "center",
-                            marginTop: "1.25rem",
-                            color: "#888",
-                            fontSize: "0.9rem",
-                        }}
-                    >
-                        Already have an account?{" "}
-                        <a href="/login" style={{ color: "#0066cc" }}>
-                            Log in here
-                        </a>
-                    </p>
-                )}
-            </div>
-        </div>
-    );
-}

frontend/src/pages/Signup.jsx

@@ -1,5 +1,188 @@
-import { Navigate } from "react-router-dom";
+/**
+ * Signup Page
+ *
+ * Allows new users to create an account with email and password
+ */
+
+import { useState } from "react";
+import { Link, useNavigate } from "react-router-dom";
+import { useAuth } from "../contexts/AuthContext";
 
 export default function Signup() {
-    return <Navigate to="/onboarding" replace />;
+    const [email, setEmail] = useState("");
+    const [password, setPassword] = useState("");
+    const [confirmPassword, setConfirmPassword] = useState("");
+    const [error, setError] = useState("");
+    const [loading, setLoading] = useState(false);
+
+    const { signup } = useAuth();
+    const navigate = useNavigate();
+
+    async function handleSubmit(e) {
+        e.preventDefault();
+
+        // Validation
+        if (!email || !password || !confirmPassword) {
+            setError("Please fill in all fields");
+            return;
+        }
+
+        if (password !== confirmPassword) {
+            setError("Passwords do not match");
+            return;
+        }
+
+        if (password.length < 6) {
+            setError("Password must be at least 6 characters");
+            return;
+        }
+
+        try {
+            setError("");
+            setLoading(true);
+            await signup(email, password);
+            navigate("/addresses"); // Auto-login and redirect
+        } catch (err) {
+            // Firebase-specific error messages
+            if (err.code === "auth/email-already-in-use") {
+                setError("Email already in use. Try logging in instead.");
+            } else if (err.code === "auth/invalid-email") {
+                setError("Invalid email address");
+            } else if (err.code === "auth/weak-password") {
+                setError("Password is too weak");
+            } else {
+                setError("Failed to create account: " + err.message);
+            }
+        } finally {
+            setLoading(false);
+        }
+    }
+
+    return (
+        <div
+            style={{
+                maxWidth: "400px",
+                margin: "4rem auto",
+                padding: "2rem",
+                border: "1px solid #333",
+                borderRadius: "8px",
+            }}
+        >
+            <h1 style={{ marginBottom: "2rem", textAlign: "center" }}>
+                Koin Ping - Sign Up
+            </h1>
+
+            {error && (
+                <div
+                    style={{
+                        padding: "0.75rem",
+                        marginBottom: "1rem",
+                        backgroundColor: "#ff000020",
+                        border: "1px solid #ff0000",
+                        borderRadius: "4px",
+                        color: "#ff6666",
+                    }}
+                >
+                    {error}
+                </div>
+            )}
+
+            <form onSubmit={handleSubmit}>
+                <div style={{ marginBottom: "1rem" }}>
+                    <label style={{ display: "block", marginBottom: "0.5rem" }}>
+                        Email
+                    </label>
+                    <input
+                        type="email"
+                        value={email}
+                        onChange={(e) => setEmail(e.target.value)}
+                        disabled={loading}
+                        style={{
+                            width: "100%",
+                            padding: "0.5rem",
+                            fontSize: "1rem",
+                            backgroundColor: "#242424",
+                            border: "1px solid #444",
+                            borderRadius: "4px",
+                            color: "white",
+                        }}
+                        required
+                    />
+                </div>
+
+                <div style={{ marginBottom: "1rem" }}>
+                    <label style={{ display: "block", marginBottom: "0.5rem" }}>
+                        Password
+                    </label>
+                    <input
+                        type="password"
+                        value={password}
+                        onChange={(e) => setPassword(e.target.value)}
+                        disabled={loading}
+                        style={{
+                            width: "100%",
+                            padding: "0.5rem",
+                            fontSize: "1rem",
+                            backgroundColor: "#242424",
+                            border: "1px solid #444",
+                            borderRadius: "4px",
+                            color: "white",
+                        }}
+                        required
+                    />
+                </div>
+
+                <div style={{ marginBottom: "1.5rem" }}>
+                    <label style={{ display: "block", marginBottom: "0.5rem" }}>
+                        Confirm Password
+                    </label>
+                    <input
+                        type="password"
+                        value={confirmPassword}
+                        onChange={(e) => setConfirmPassword(e.target.value)}
+                        disabled={loading}
+                        style={{
+                            width: "100%",
+                            padding: "0.5rem",
+                            fontSize: "1rem",
+                            backgroundColor: "#242424",
+                            border: "1px solid #444",
+                            borderRadius: "4px",
+                            color: "white",
+                        }}
+                        required
+                    />
+                </div>
+
+                <button
+                    type="submit"
+                    disabled={loading}
+                    style={{
+                        width: "100%",
+                        padding: "0.75rem",
+                        fontSize: "1rem",
+                        backgroundColor: loading ? "#333" : "#0066cc",
+                        color: "white",
+                        border: "none",
+                        borderRadius: "4px",
+                        cursor: loading ? "not-allowed" : "pointer",
+                    }}
+                >
+                    {loading ? "Creating account..." : "Sign Up"}
+                </button>
+            </form>
+
+            <div style={{ marginTop: "1.5rem", textAlign: "center" }}>
+                <p style={{ color: "#b3b3b3" }}>
+                    Already have an account?{" "}
+                    <Link
+                        to="/login"
+                        style={{ color: "#0066cc", textDecoration: "none" }}
+                    >
+                        Log in here
+                    </Link>
+                </p>
+            </div>
+        </div>
+    );
 }