Set up default currency accounts automatically (#72)

backend/product/auth/flow/service.go

@@ -31,8 +31,13 @@ type SignupFacts interface {
 	Ready(context.Context, bson.ObjectID) error
 }
 
+type CurrencyAccounts interface {
+	Ensure(context.Context, *customer.Account) error
+}
+
 type Service struct {
 	Facts         SignupFacts
+	Wallet        CurrencyAccounts
 	Accounts      account.DB
 	Customers     accountservice.AccountService
 	Tokens        verification.DB
@@ -110,6 +115,11 @@ func (s *Service) Signup(ctx context.Context, a *customer.Account, ip, key strin
 			return nil, err
 		}
 	}
+	if s.Wallet != nil {
+		if err := s.Wallet.Ensure(ctx, a); err != nil {
+			return nil, err
+		}
+	}
 	if raw != "" {
 		u, _ := url.Parse(s.ActivationURL)
 		q := u.Query()
@@ -148,6 +158,11 @@ func (s *Service) ResendActivation(ctx context.Context, email, ip, key string) e
 			return err
 		}
 	}
+	if s.Wallet != nil {
+		if err := s.Wallet.Ensure(ctx, a); err != nil {
+			return err
+		}
+	}
 	_, err = s.sendActivation(ctx, a, key)
 	return err
 }

backend/product/auth/http/v1/public/verification_integration_test.go

@@ -75,6 +75,17 @@ func (m *capturedMail) Send(_ context.Context, r notifications.Message) error {
 	}
 	return nil
 }
+
+type signupWallet struct {
+	customers []bson.ObjectID
+	err       error
+}
+
+func (s *signupWallet) Ensure(_ context.Context, a *customer.Account) error {
+	s.customers = append(s.customers, a.ID)
+	return s.err
+}
+
 func TestSignupActivationAndLoginEmailFlow(t *testing.T) {
 	ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
 	defer cancel()
@@ -102,6 +113,8 @@ func TestSignupActivationAndLoginEmailFlow(t *testing.T) {
 	require.NoError(t, err)
 	provider := &signupProvider{fail: true}
 	service.Facts = &identity.Service{Store: bindings, Provider: provider, Logger: zap.NewNop()}
+	wallet := &signupWallet{err: merrors.ServiceUnavailable("account setup temporarily unavailable")}
+	service.Wallet = wallet
 	// Keep the real verification/customer stores and capture only session writes.
 	sessions := &testRefreshTokenDB{client: &session.Client{ClientID: "web"}}
 	records, err := factorstore.Open(zap.NewNop(), factory)
@@ -133,6 +146,14 @@ func TestSignupActivationAndLoginEmailFlow(t *testing.T) {
 	signup["name"] = "Changed retry name"
 	provider.fail = false
 	w = post("signup", signup)
+	require.Equal(t, 503, w.Code, w.Body.String())
+	require.Empty(t, mail.messages)
+	require.Len(t, wallet.customers, 1)
+	w = post("verification/send", map[string]string{"email": "user@example.com", "idempotencyKey": "wallet-retry"})
+	require.Equal(t, 503, w.Code, w.Body.String())
+	require.Empty(t, mail.messages)
+	wallet.err = nil
+	w = post("signup", signup)
 	require.Equal(t, 202, w.Code, w.Body.String())
 	require.Equal(t, 1, provider.registrations)
 	require.Equal(t, "Customer", provider.last.FullName)
@@ -149,6 +170,7 @@ func TestSignupActivationAndLoginEmailFlow(t *testing.T) {
 	require.NoError(t, err)
 	require.False(t, a.IsActive())
 	require.Equal(t, a.ID.Hex(), provider.last.CustomerRef)
+	require.Equal(t, []bson.ObjectID{a.ID, a.ID, a.ID}, wallet.customers)
 	require.NoError(t, service.Facts.Ready(ctx, a.ID))
 	login := map[string]any{"login": map[string]string{"login": "user@example.com", "password": " correct password "}, "clientId": "web", "deviceId": "browser"}
 	require.Equal(t, 403, post("login", login).Code)