[feature] Federate local account deletion (#431)

* add account delete to API

* model account delete request

* add AccountDeleteLocal

* federate local account deletes

* add DeleteLocal

* update transport (controller) to allow shortcuts

* delete logic + testing

* update swagger docs

* more tests + fixes

docs/api/swagger.yaml

@@ -1798,7 +1798,7 @@ info:
     name: AGPL3
     url: https://www.gnu.org/licenses/agpl-3.0.en.html
   title: GoToSocial
-  version: 0.0.1
+  version: REPLACE_ME
 paths:
   /.well-known/nodeinfo:
     get:
@@ -2191,6 +2191,31 @@ paths:
       summary: Unfollow account with id.
       tags:
       - accounts
+  /api/v1/accounts/delete:
+    post:
+      consumes:
+      - multipart/form-data
+      operationId: accountDelete
+      parameters:
+      - description: Password of the account user, for confirmation.
+        in: formData
+        name: password
+        required: true
+        type: string
+      responses:
+        "202":
+          description: The account deletion has been accepted and the account will
+            be deleted.
+        "400":
+          description: bad request
+        "401":
+          description: unauthorized
+      security:
+      - OAuth2 Bearer:
+        - write:accounts
+      summary: Delete your account.
+      tags:
+      - accounts
   /api/v1/accounts/relationships:
     get:
       operationId: accountRelationships
@@ -2341,6 +2366,8 @@ paths:
           description: bad request
         "403":
           description: forbidden
+        "409":
+          description: conflict -- domain/shortcode combo for emoji already exists
       security:
       - OAuth2 Bearer:
         - admin

internal/api/client/account/account.go

@@ -71,6 +71,8 @@ const (
 	BlockPath = BasePathWithID + "/block"
 	// UnblockPath is for removing a block of an account
 	UnblockPath = BasePathWithID + "/unblock"
+	// DeleteAccountPath is for deleting one's account via the API
+	DeleteAccountPath = BasePath + "/delete"
 )
 
 // Module implements the ClientAPIModule interface for account-related actions
@@ -90,6 +92,9 @@ func (m *Module) Route(r router.Router) error {
 	// create account
 	r.AttachHandler(http.MethodPost, BasePath, m.AccountCreatePOSTHandler)
 
+	// delete account
+	r.AttachHandler(http.MethodPost, DeleteAccountPath, m.AccountDeletePOSTHandler)
+
 	// get account
 	r.AttachHandler(http.MethodGet, BasePathWithID, m.muxHandler)
 

internal/api/client/account/account_test.go

@@ -19,7 +19,6 @@ import (
 	"github.com/superseriousbusiness/gotosocial/internal/media"
 	"github.com/superseriousbusiness/gotosocial/internal/oauth"
 	"github.com/superseriousbusiness/gotosocial/internal/processing"
-	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
 	"github.com/superseriousbusiness/gotosocial/testrig"
 )
 
@@ -27,7 +26,6 @@ type AccountStandardTestSuite struct {
 	// standard suite interfaces
 	suite.Suite
 	db           db.DB
-	tc           typeutils.TypeConverter
 	storage      *kv.KVStore
 	mediaManager media.Manager
 	federator    federation.Federator

internal/api/client/account/accountdelete.go

@@ -0,0 +1,90 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"net/http"
+
+	"github.com/sirupsen/logrus"
+
+	"github.com/gin-gonic/gin"
+	"github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// AccountDeletePOSTHandler swagger:operation POST /api/v1/accounts/delete accountDelete
+//
+// Delete your account.
+//
+// ---
+// tags:
+// - accounts
+//
+// consumes:
+// - multipart/form-data
+//
+// parameters:
+// - name: password
+//   in: formData
+//   description: Password of the account user, for confirmation.
+//   type: string
+//   required: true
+//
+// security:
+// - OAuth2 Bearer:
+//   - write:accounts
+//
+// responses:
+//   '202':
+//     description: "The account deletion has been accepted and the account will be deleted."
+//   '400':
+//      description: bad request
+//   '401':
+//      description: unauthorized
+func (m *Module) AccountDeletePOSTHandler(c *gin.Context) {
+	l := logrus.WithField("func", "AccountDeletePOSTHandler")
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		l.Debugf("couldn't auth: %s", err)
+		c.JSON(http.StatusUnauthorized, gin.H{"error": err.Error()})
+		return
+	}
+	l.Tracef("retrieved account %+v", authed.Account.ID)
+
+	form := &model.AccountDeleteRequest{}
+	if err := c.ShouldBind(&form); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	if form.Password == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no password provided in account delete request"})
+		return
+	}
+
+	form.DeleteOriginID = authed.Account.ID
+
+	if errWithCode := m.processor.AccountDeleteLocal(c.Request.Context(), authed, form); errWithCode != nil {
+		l.Debugf("could not delete account: %s", errWithCode.Error())
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	c.JSON(http.StatusAccepted, gin.H{"message": "accepted"})
+}

internal/api/client/account/accountdelete_test.go

@@ -0,0 +1,101 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account_test
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/api/client/account"
+	"github.com/superseriousbusiness/gotosocial/testrig"
+)
+
+type AccountDeleteTestSuite struct {
+	AccountStandardTestSuite
+}
+
+func (suite *AccountDeleteTestSuite) TestAccountDeletePOSTHandler() {
+	// set up the request
+	// we're deleting zork
+	requestBody, w, err := testrig.CreateMultipartFormData(
+		"", "",
+		map[string]string{
+			"password": "password",
+		})
+	if err != nil {
+		panic(err)
+	}
+	bodyBytes := requestBody.Bytes()
+	recorder := httptest.NewRecorder()
+	ctx := suite.newContext(recorder, http.MethodPost, bodyBytes, account.DeleteAccountPath, w.FormDataContentType())
+
+	// call the handler
+	suite.accountModule.AccountDeletePOSTHandler(ctx)
+
+	// 1. we should have Accepted because our request was valid
+	suite.Equal(http.StatusAccepted, recorder.Code)
+}
+
+func (suite *AccountDeleteTestSuite) TestAccountDeletePOSTHandlerWrongPassword() {
+	// set up the request
+	// we're deleting zork
+	requestBody, w, err := testrig.CreateMultipartFormData(
+		"", "",
+		map[string]string{
+			"password": "aaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+		})
+	if err != nil {
+		panic(err)
+	}
+	bodyBytes := requestBody.Bytes()
+	recorder := httptest.NewRecorder()
+	ctx := suite.newContext(recorder, http.MethodPost, bodyBytes, account.DeleteAccountPath, w.FormDataContentType())
+
+	// call the handler
+	suite.accountModule.AccountDeletePOSTHandler(ctx)
+
+	// 1. we should have Forbidden because we supplied the wrong password
+	suite.Equal(http.StatusForbidden, recorder.Code)
+}
+
+func (suite *AccountDeleteTestSuite) TestAccountDeletePOSTHandlerNoPassword() {
+	// set up the request
+	// we're deleting zork
+	requestBody, w, err := testrig.CreateMultipartFormData(
+		"", "",
+		map[string]string{})
+	if err != nil {
+		panic(err)
+	}
+	bodyBytes := requestBody.Bytes()
+	recorder := httptest.NewRecorder()
+	ctx := suite.newContext(recorder, http.MethodPost, bodyBytes, account.DeleteAccountPath, w.FormDataContentType())
+
+	// call the handler
+	suite.accountModule.AccountDeletePOSTHandler(ctx)
+
+	// 1. we should have StatusBadRequest because our request was invalid
+	suite.Equal(http.StatusBadRequest, recorder.Code)
+}
+
+func TestAccountDeleteTestSuite(t *testing.T) {
+	suite.Run(t, new(AccountDeleteTestSuite))
+}

internal/api/model/account.go

@@ -187,3 +187,14 @@ type AccountFollowRequest struct {
 	// Notify when this account posts.
 	Notify *bool `form:"notify" json:"notify" xml:"notify"`
 }
+
+// AccountDeleteRequest models a request to delete an account.
+//
+// swagger:ignore
+type AccountDeleteRequest struct {
+	// Password of the account's user, for confirmation.
+	Password string `form:"password" json:"password" xml:"password"`
+	// The origin of the delete account request.
+	// Can be the ID of the account owner, or the ID of an admin account.
+	DeleteOriginID string `form:"-" json:"-" xml:"-"`
+}

internal/api/s2s/user/userget_test.go

@@ -25,13 +25,15 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"testing"
+	"time"
 
 	"github.com/gin-gonic/gin"
-	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/suite"
 	"github.com/superseriousbusiness/activity/streams"
 	"github.com/superseriousbusiness/activity/streams/vocab"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
 	"github.com/superseriousbusiness/gotosocial/internal/api/s2s/user"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
 	"github.com/superseriousbusiness/gotosocial/testrig"
 )
 
@@ -80,24 +82,101 @@ func (suite *UserGetTestSuite) TestGetUser() {
 	result := recorder.Result()
 	defer result.Body.Close()
 	b, err := ioutil.ReadAll(result.Body)
-	assert.NoError(suite.T(), err)
+	suite.NoError(err)
 
 	// should be a Person
 	m := make(map[string]interface{})
 	err = json.Unmarshal(b, &m)
-	assert.NoError(suite.T(), err)
+	suite.NoError(err)
 
 	t, err := streams.ToType(context.Background(), m)
-	assert.NoError(suite.T(), err)
+	suite.NoError(err)
 
 	person, ok := t.(vocab.ActivityStreamsPerson)
-	assert.True(suite.T(), ok)
+	suite.True(ok)
 
 	// convert person to account
 	// since this account is already known, we should get a pretty full model of it from the conversion
 	a, err := suite.tc.ASRepresentationToAccount(context.Background(), person, false)
-	assert.NoError(suite.T(), err)
-	assert.EqualValues(suite.T(), targetAccount.Username, a.Username)
+	suite.NoError(err)
+	suite.EqualValues(targetAccount.Username, a.Username)
+}
+
+// TestGetUserPublicKeyDeleted checks whether the public key of a deleted account can still be dereferenced.
+// This is needed by remote instances for authenticating delete requests and stuff like that.
+func (suite *UserGetTestSuite) TestGetUserPublicKeyDeleted() {
+	targetAccount := suite.testAccounts["local_account_1"]
+
+	// first delete the account, as though zork had deleted himself
+	authed := &oauth.Auth{
+		Application: suite.testApplications["local_account_1"],
+		User:        suite.testUsers["local_account_1"],
+		Account:     suite.testAccounts["local_account_1"],
+	}
+	suite.processor.AccountDeleteLocal(context.Background(), authed, &apimodel.AccountDeleteRequest{
+		Password:       "password",
+		DeleteOriginID: targetAccount.ID,
+	})
+
+	// now wait just a sec for it to go through....
+	time.Sleep(1 * time.Second)
+
+	// the dereference we're gonna use
+	derefRequests := testrig.NewTestDereferenceRequests(suite.testAccounts)
+	signedRequest := derefRequests["foss_satan_dereference_zork_public_key"]
+
+	tc := testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil), suite.db)
+	federator := testrig.NewTestFederator(suite.db, tc, suite.storage, suite.mediaManager)
+	emailSender := testrig.NewEmailSender("../../../../web/template/", nil)
+	processor := testrig.NewTestProcessor(suite.db, suite.storage, federator, emailSender, suite.mediaManager)
+	userModule := user.New(processor).(*user.Module)
+
+	// setup request
+	recorder := httptest.NewRecorder()
+	ctx, _ := gin.CreateTestContext(recorder)
+	ctx.Request = httptest.NewRequest(http.MethodGet, targetAccount.PublicKeyURI, nil) // the endpoint we're hitting
+	ctx.Request.Header.Set("accept", "application/activity+json")
+	ctx.Request.Header.Set("Signature", signedRequest.SignatureHeader)
+	ctx.Request.Header.Set("Date", signedRequest.DateHeader)
+
+	// we need to pass the context through signature check first to set appropriate values on it
+	suite.securityModule.SignatureCheck(ctx)
+
+	// normally the router would populate these params from the path values,
+	// but because we're calling the function directly, we need to set them manually.
+	ctx.Params = gin.Params{
+		gin.Param{
+			Key:   user.UsernameKey,
+			Value: targetAccount.Username,
+		},
+	}
+
+	// trigger the function being tested
+	userModule.UsersGETHandler(ctx)
+
+	// check response
+	suite.EqualValues(http.StatusOK, recorder.Code)
+
+	result := recorder.Result()
+	defer result.Body.Close()
+	b, err := ioutil.ReadAll(result.Body)
+	suite.NoError(err)
+
+	// should be a Person
+	m := make(map[string]interface{})
+	err = json.Unmarshal(b, &m)
+	suite.NoError(err)
+
+	t, err := streams.ToType(context.Background(), m)
+	suite.NoError(err)
+
+	person, ok := t.(vocab.ActivityStreamsPerson)
+	suite.True(ok)
+
+	// convert person to account
+	a, err := suite.tc.ASRepresentationToAccount(context.Background(), person, false)
+	suite.NoError(err)
+	suite.EqualValues(targetAccount.Username, a.Username)
 }
 
 func TestUserGetTestSuite(t *testing.T) {

internal/processing/account.go

@@ -30,6 +30,10 @@ func (p *processor) AccountCreate(ctx context.Context, authed *oauth.Auth, form
 	return p.accountProcessor.Create(ctx, authed.Token, authed.Application, form)
 }
 
+func (p *processor) AccountDeleteLocal(ctx context.Context, authed *oauth.Auth, form *apimodel.AccountDeleteRequest) gtserror.WithCode {
+	return p.accountProcessor.DeleteLocal(ctx, authed.Account, form)
+}
+
 func (p *processor) AccountGet(ctx context.Context, authed *oauth.Auth, targetAccountID string) (*apimodel.Account, error) {
 	return p.accountProcessor.Get(ctx, authed.Account, targetAccountID)
 }

internal/processing/account/account.go

@@ -42,7 +42,10 @@ type Processor interface {
 	Create(ctx context.Context, applicationToken oauth2.TokenInfo, application *gtsmodel.Application, form *apimodel.AccountCreateRequest) (*apimodel.Token, error)
 	// Delete deletes an account, and all of that account's statuses, media, follows, notifications, etc etc etc.
 	// The origin passed here should be either the ID of the account doing the delete (can be itself), or the ID of a domain block.
-	Delete(ctx context.Context, account *gtsmodel.Account, origin string) error
+	Delete(ctx context.Context, account *gtsmodel.Account, origin string) gtserror.WithCode
+	// DeleteLocal is like delete, but specifically for deletion of local accounts rather than federated ones.
+	// Unlike Delete, it will propagate the deletion out across the federating API to other instances.
+	DeleteLocal(ctx context.Context, account *gtsmodel.Account, form *apimodel.AccountDeleteRequest) gtserror.WithCode
 	// Get processes the given request for account information.
 	Get(ctx context.Context, requestingAccount *gtsmodel.Account, targetAccountID string) (*apimodel.Account, error)
 	// Update processes the update of an account with the given form

internal/processing/account/delete.go

@@ -20,13 +20,17 @@ package account
 
 import (
 	"context"
+	"errors"
 	"time"
 
 	"github.com/sirupsen/logrus"
 	"github.com/superseriousbusiness/gotosocial/internal/ap"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 	"github.com/superseriousbusiness/gotosocial/internal/messages"
+	"golang.org/x/crypto/bcrypt"
 )
 
 // Delete handles the complete deletion of an account.
@@ -50,7 +54,7 @@ import (
 // 16. Delete account's user
 // 17. Delete account's timeline
 // 18. Delete account itself
-func (p *processor) Delete(ctx context.Context, account *gtsmodel.Account, origin string) error {
+func (p *processor) Delete(ctx context.Context, account *gtsmodel.Account, origin string) gtserror.WithCode {
 	fields := logrus.Fields{
 		"func":     "Delete",
 		"username": account.Username,
@@ -256,7 +260,7 @@ selectStatusesLoop:
 	// 16. Delete account's user
 	l.Debug("deleting account user")
 	if err := p.db.DeleteWhere(ctx, []db.Where{{Key: "account_id", Value: account.ID}}, &gtsmodel.User{}); err != nil {
-		return err
+		return gtserror.NewErrorInternalError(err)
 	}
 
 	// 17. Delete account's timeline
@@ -282,9 +286,52 @@ selectStatusesLoop:
 
 	account, err := p.db.UpdateAccount(ctx, account)
 	if err != nil {
-		return err
+		return gtserror.NewErrorInternalError(err)
 	}
 
 	l.Infof("deleted account with username %s from domain %s", account.Username, account.Domain)
 	return nil
 }
+
+func (p *processor) DeleteLocal(ctx context.Context, account *gtsmodel.Account, form *apimodel.AccountDeleteRequest) gtserror.WithCode {
+	fromClientAPIMessage := messages.FromClientAPI{
+		APObjectType:   ap.ActorPerson,
+		APActivityType: ap.ActivityDelete,
+		TargetAccount:  account,
+	}
+
+	if form.DeleteOriginID == account.ID {
+		// the account owner themself has requested deletion via the API, get their user from the db
+		user := &gtsmodel.User{}
+		if err := p.db.GetWhere(ctx, []db.Where{{Key: "account_id", Value: account.ID}}, user); err != nil {
+			return gtserror.NewErrorInternalError(err)
+		}
+
+		// now check that the password they supplied is correct
+		// make sure a password is actually set and bail if not
+		if user.EncryptedPassword == "" {
+			return gtserror.NewErrorForbidden(errors.New("user password was not set"))
+		}
+
+		// compare the provided password with the encrypted one from the db, bail if they don't match
+		if err := bcrypt.CompareHashAndPassword([]byte(user.EncryptedPassword), []byte(form.Password)); err != nil {
+			return gtserror.NewErrorForbidden(errors.New("invalid password"))
+		}
+
+		fromClientAPIMessage.OriginAccount = account
+	} else {
+		// the delete has been requested by some other account, grab it;
+		// if we've reached this point we know it has permission already
+		requestingAccount, err := p.db.GetAccountByID(ctx, form.DeleteOriginID)
+		if err != nil {
+			return gtserror.NewErrorInternalError(err)
+		}
+
+		fromClientAPIMessage.OriginAccount = requestingAccount
+	}
+
+	// put the delete in the processor queue to handle the rest of it asynchronously
+	p.fromClientAPI <- fromClientAPIMessage
+
+	return nil
+}

internal/processing/account_test.go

@@ -0,0 +1,90 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package processing_test
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/activity/pub"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+type AccountTestSuite struct {
+	ProcessingStandardTestSuite
+}
+
+func (suite *AccountTestSuite) TestAccountDeleteLocal() {
+	ctx := context.Background()
+	deletingAccount := suite.testAccounts["local_account_1"]
+	followingAccount := suite.testAccounts["remote_account_1"]
+
+	// make the following account follow the deleting account so that a delete message will be sent to it via the federating API
+	follow := &gtsmodel.Follow{
+		ID:              "01FJ1S8DX3STJJ6CEYPMZ1M0R3",
+		CreatedAt:       time.Now(),
+		UpdatedAt:       time.Now(),
+		URI:             fmt.Sprintf("%s/follow/01FJ1S8DX3STJJ6CEYPMZ1M0R3", followingAccount.URI),
+		AccountID:       followingAccount.ID,
+		TargetAccountID: deletingAccount.ID,
+	}
+	err := suite.db.Put(ctx, follow)
+	suite.NoError(err)
+
+	errWithCode := suite.processor.AccountDeleteLocal(ctx, suite.testAutheds["local_account_1"], &apimodel.AccountDeleteRequest{
+		Password:       "password",
+		DeleteOriginID: deletingAccount.ID,
+	})
+	suite.NoError(errWithCode)
+	time.Sleep(1 * time.Second) // wait a sec for the delete to process
+
+	// the delete should be federated outwards to the following account's inbox
+	sent, ok := suite.sentHTTPRequests[followingAccount.InboxURI]
+	suite.True(ok)
+	delete := &struct {
+		Actor  string `json:"actor"`
+		ID     string `json:"id"`
+		Object string `json:"object"`
+		To     string `json:"to"`
+		CC     string `json:"cc"`
+		Type   string `json:"type"`
+	}{}
+	err = json.Unmarshal(sent, delete)
+	suite.NoError(err)
+
+	suite.Equal(deletingAccount.URI, delete.Actor)
+	suite.Equal(deletingAccount.URI, delete.Object)
+	suite.Equal(deletingAccount.FollowersURI, delete.To)
+	suite.Equal(pub.PublicActivityPubIRI, delete.CC)
+	suite.Equal("Delete", delete.Type)
+
+	// the deleted account should be deleted
+	dbAccount, err := suite.db.GetAccountByID(ctx, deletingAccount.ID)
+	suite.NoError(err)
+	suite.WithinDuration(dbAccount.SuspendedAt, time.Now(), 30*time.Second)
+}
+
+func TestAccountTestSuite(t *testing.T) {
+	suite.Run(t, &AccountTestSuite{})
+}

internal/processing/fromclientapi.go

@@ -24,6 +24,7 @@ import (
 	"fmt"
 	"net/url"
 
+	"github.com/superseriousbusiness/activity/pub"
 	"github.com/superseriousbusiness/activity/streams"
 	"github.com/superseriousbusiness/gotosocial/internal/ap"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
@@ -320,11 +321,69 @@ func (p *processor) processDeleteAccountFromClientAPI(ctx context.Context, clien
 		// origin is whichever account caused this message
 		origin = clientMsg.OriginAccount.ID
 	}
+
+	if err := p.federateAccountDelete(ctx, clientMsg.TargetAccount); err != nil {
+		return err
+	}
+
 	return p.accountProcessor.Delete(ctx, clientMsg.TargetAccount, origin)
 }
 
 // TODO: move all the below functions into federation.Federator
 
+func (p *processor) federateAccountDelete(ctx context.Context, account *gtsmodel.Account) error {
+	// do nothing if this isn't our account
+	if account.Domain != "" {
+		return nil
+	}
+
+	outboxIRI, err := url.Parse(account.OutboxURI)
+	if err != nil {
+		return fmt.Errorf("federateAccountDelete: error parsing outboxURI %s: %s", account.OutboxURI, err)
+	}
+
+	actorIRI, err := url.Parse(account.URI)
+	if err != nil {
+		return fmt.Errorf("federateAccountDelete: error parsing actorIRI %s: %s", account.URI, err)
+	}
+
+	followersIRI, err := url.Parse(account.FollowersURI)
+	if err != nil {
+		return fmt.Errorf("federateAccountDelete: error parsing followersIRI %s: %s", account.FollowersURI, err)
+	}
+
+	publicIRI, err := url.Parse(pub.PublicActivityPubIRI)
+	if err != nil {
+		return fmt.Errorf("federateAccountDelete: error parsing url %s: %s", pub.PublicActivityPubIRI, err)
+	}
+
+	// create a delete and set the appropriate actor on it
+	delete := streams.NewActivityStreamsDelete()
+
+	// set the actor for the delete; no matter who deleted it we should use the account owner for this
+	deleteActor := streams.NewActivityStreamsActorProperty()
+	deleteActor.AppendIRI(actorIRI)
+	delete.SetActivityStreamsActor(deleteActor)
+
+	// Set the account IRI as the 'object' property.
+	deleteObject := streams.NewActivityStreamsObjectProperty()
+	deleteObject.AppendIRI(actorIRI)
+	delete.SetActivityStreamsObject(deleteObject)
+
+	// send to followers...
+	deleteTo := streams.NewActivityStreamsToProperty()
+	deleteTo.AppendIRI(followersIRI)
+	delete.SetActivityStreamsTo(deleteTo)
+
+	// ... and CC to public
+	deleteCC := streams.NewActivityStreamsCcProperty()
+	deleteCC.AppendIRI(publicIRI)
+	delete.SetActivityStreamsCc(deleteCC)
+
+	_, err = p.federator.FederatingActor().Send(ctx, outboxIRI, delete)
+	return err
+}
+
 func (p *processor) federateStatus(ctx context.Context, status *gtsmodel.Status) error {
 	// do nothing if the status shouldn't be federated
 	if !status.Federated {

internal/processing/processor.go

@@ -73,6 +73,8 @@ type Processor interface {
 
 	// AccountCreate processes the given form for creating a new account, returning an oauth token for that account if successful.
 	AccountCreate(ctx context.Context, authed *oauth.Auth, form *apimodel.AccountCreateRequest) (*apimodel.Token, error)
+	// AccountDeleteLocal processes the delete of a LOCAL account using the given form.
+	AccountDeleteLocal(ctx context.Context, authed *oauth.Auth, form *apimodel.AccountDeleteRequest) gtserror.WithCode
 	// AccountGet processes the given request for account information.
 	AccountGet(ctx context.Context, authed *oauth.Auth, targetAccountID string) (*apimodel.Account, error)
 	// AccountUpdate processes the update of an account with the given form

internal/processing/processor_test.go

@@ -95,8 +95,8 @@ func (suite *ProcessingStandardTestSuite) SetupSuite() {
 }
 
 func (suite *ProcessingStandardTestSuite) SetupTest() {
-	testrig.InitTestLog()
 	testrig.InitTestConfig()
+	testrig.InitTestLog()
 
 	suite.db = testrig.NewTestDB()
 	suite.testActivities = testrig.NewTestActivities(suite.testAccounts)

testrig/testmodels.go

@@ -377,7 +377,7 @@ func NewTestAccounts() map[string]*gtsmodel.Account {
 			AlsoKnownAs:             "",
 			PrivateKey:              &rsa.PrivateKey{},
 			PublicKey:               &rsa.PublicKey{},
-			PublicKeyURI:            "http://localhost:8080/users/the_mighty_zork#main-key",
+			PublicKeyURI:            "http://localhost:8080/users/the_mighty_zork/main-key",
 			SensitizedAt:            time.Time{},
 			SilencedAt:              time.Time{},
 			SuspendedAt:             time.Time{},
@@ -1656,6 +1656,14 @@ func NewTestDereferenceRequests(accounts map[string]*gtsmodel.Account) map[strin
 		DateHeader:      date,
 	}
 
+	target = URLMustParse(accounts["local_account_1"].PublicKeyURI)
+	sig, digest, date = GetSignatureForDereference(accounts["remote_account_1"].PublicKeyURI, accounts["remote_account_1"].PrivateKey, target)
+	fossSatanDereferenceZorkPublicKey := ActivityWithSignature{
+		SignatureHeader: sig,
+		DigestHeader:    digest,
+		DateHeader:      date,
+	}
+
 	target = URLMustParse(statuses["local_account_1_status_1"].URI + "/replies")
 	sig, digest, date = GetSignatureForDereference(accounts["remote_account_1"].PublicKeyURI, accounts["remote_account_1"].PrivateKey, target)
 	fossSatanDereferenceLocalAccount1Status1Replies := ActivityWithSignature{
@@ -1706,6 +1714,7 @@ func NewTestDereferenceRequests(accounts map[string]*gtsmodel.Account) map[strin
 
 	return map[string]ActivityWithSignature{
 		"foss_satan_dereference_zork":                                  fossSatanDereferenceZork,
+		"foss_satan_dereference_zork_public_key":                       fossSatanDereferenceZorkPublicKey,
 		"foss_satan_dereference_local_account_1_status_1_replies":      fossSatanDereferenceLocalAccount1Status1Replies,
 		"foss_satan_dereference_local_account_1_status_1_replies_next": fossSatanDereferenceLocalAccount1Status1RepliesNext,
 		"foss_satan_dereference_local_account_1_status_1_replies_last": fossSatanDereferenceLocalAccount1Status1RepliesLast,