backend/internal/account/email.go

@@ -35,12 +35,13 @@ const (
 )
 
 // Confirmation purposes recorded on a pending confirm-code row. They select what
-// verifying the code or the deeplink token does: sign in (login) or link/confirm the
-// address on the current account (link). Email change and account deletion add
-// further purposes in later stages.
+// verifying the code or the deeplink token does: sign in (login), link/confirm the
+// address on the current account (link), or replace the account's confirmed email with
+// a new address (change). Account deletion adds a further purpose in a later stage.
 const (
-	purposeLogin = "login"
-	purposeLink  = "link"
+	purposeLogin  = "login"
+	purposeLink   = "link"
+	purposeChange = "change"
 )
 
 // Errors returned by the email confirm-code flow.
@@ -326,6 +327,26 @@ func (s *EmailService) ConfirmByToken(ctx context.Context, token string) (LinkCo
 			return LinkConfirmation{}, err
 		}
 		return LinkConfirmation{Purpose: purposeLink, Account: pend.accountID}, nil
+	case purposeChange:
+		owner, ok, err := s.store.confirmedEmailAccount(ctx, pend.email)
+		if err != nil {
+			return LinkConfirmation{}, err
+		}
+		if ok && owner != pend.accountID {
+			// The new address is confirmed by a different account: refuse without
+			// disclosing it (anti-enumeration). Unlike a link, a change never merges.
+			return LinkConfirmation{}, ErrEmailTaken
+		}
+		if ok && owner == pend.accountID {
+			if err := s.store.consumeConfirmation(ctx, pend.id, s.now()); err != nil {
+				return LinkConfirmation{}, err
+			}
+			return LinkConfirmation{Purpose: purposeChange, Account: pend.accountID}, nil
+		}
+		if err := s.store.replaceEmailIdentity(ctx, pend.id, pend.accountID, pend.email, s.now()); err != nil {
+			return LinkConfirmation{}, err
+		}
+		return LinkConfirmation{Purpose: purposeChange, Account: pend.accountID}, nil
 	default:
 		return LinkConfirmation{}, fmt.Errorf("account: unsupported confirmation purpose %q", pend.purpose)
 	}
@@ -506,6 +527,50 @@ func (s *Store) confirmEmailIdentity(ctx context.Context, confirmationID, accoun
 	return nil
 }
 
+// replaceEmailIdentity consumes the confirmation, deletes the account's existing email
+// identity (freeing the old address) and inserts newEmail as its confirmed email, inside
+// one transaction. It backs the change-email flow. A unique-constraint violation — the
+// new address was confirmed elsewhere in the meantime — surfaces as ErrEmailTaken. When
+// the account holds no email identity yet the delete is a no-op, so this doubles as an
+// attach.
+func (s *Store) replaceEmailIdentity(ctx context.Context, confirmationID, accountID uuid.UUID, newEmail string, now time.Time) error {
+	identityID, err := uuid.NewV7()
+	if err != nil {
+		return fmt.Errorf("account: new identity id: %w", err)
+	}
+	err = withTx(ctx, s.db, func(tx *sql.Tx) error {
+		upd := table.EmailConfirmations.
+			UPDATE(table.EmailConfirmations.ConsumedAt).
+			SET(postgres.TimestampzT(now)).
+			WHERE(table.EmailConfirmations.ConfirmationID.EQ(postgres.UUID(confirmationID)))
+		if _, err := upd.ExecContext(ctx, tx); err != nil {
+			return fmt.Errorf("consume confirmation: %w", err)
+		}
+		del := table.Identities.DELETE().WHERE(
+			table.Identities.AccountID.EQ(postgres.UUID(accountID)).
+				AND(table.Identities.Kind.EQ(postgres.String(KindEmail))),
+		)
+		if _, err := del.ExecContext(ctx, tx); err != nil {
+			return fmt.Errorf("delete old email identity: %w", err)
+		}
+		ins := table.Identities.INSERT(
+			table.Identities.IdentityID, table.Identities.AccountID, table.Identities.Kind,
+			table.Identities.ExternalID, table.Identities.Confirmed,
+		).VALUES(identityID, accountID, KindEmail, newEmail, true)
+		if _, err := ins.ExecContext(ctx, tx); err != nil {
+			return err
+		}
+		return nil
+	})
+	if err != nil {
+		if isUniqueViolation(err) {
+			return ErrEmailTaken
+		}
+		return fmt.Errorf("account: replace email identity: %w", err)
+	}
+	return nil
+}
+
 // confirmEmailLogin consumes the login code and marks the existing email
 // identity confirmed, inside one transaction. The identity already exists (a
 // login provisioned it), so this updates rather than inserts and is idempotent

backend/internal/account/emailtemplate.go

@@ -80,6 +80,24 @@ var confirmEmailCopy = map[string]map[string]emailCopy{
 			FooterIgnore: "Если вы не запрашивали это письмо, просто проигнорируйте его.",
 		},
 	},
+	purposeChange: {
+		"en": {
+			Subject:      "Confirm your new Erudit e-mail",
+			Preheader:    "Confirm your new address",
+			Heading:      "Confirm your new e-mail",
+			Intro:        "Enter this code to switch your account to this address:",
+			CTALabel:     "Confirm with one tap",
+			FooterIgnore: "If you didn't request this change, you can safely ignore it — your address stays the same.",
+		},
+		"ru": {
+			Subject:      "Подтвердите новый e-mail в Эрудит",
+			Preheader:    "Подтвердите новый адрес",
+			Heading:      "Смена e-mail",
+			Intro:        "Введите этот код, чтобы привязать аккаунт к новому адресу:",
+			CTALabel:     "Подтвердить одним нажатием",
+			FooterIgnore: "Если вы не запрашивали смену, просто проигнорируйте письмо — адрес останется прежним.",
+		},
+	},
 }
 
 // emailBrand is the brand wordmark per locale.

backend/internal/account/link.go

@@ -119,6 +119,57 @@ func (s *EmailService) ConfirmLink(ctx context.Context, accountID uuid.UUID, ema
 	return accountID, true, nil
 }
 
+// RequestChangeCode issues and mails a confirm-code to newEmail for an authenticated
+// email change on accountID, replacing any prior pending code. Like RequestLinkCode it
+// never refuses up front on "taken" (anti-enumeration): possession of newEmail is the
+// authorization, and a conflict with another account is revealed only at confirm — as a
+// non-disclosing refusal, never a merge.
+func (s *EmailService) RequestChangeCode(ctx context.Context, accountID uuid.UUID, newEmail string) error {
+	addr, err := normalizeEmail(newEmail)
+	if err != nil {
+		return err
+	}
+	if !s.allowSend(addr) {
+		return ErrTooManyRequests
+	}
+	return s.issueCode(ctx, accountID, addr, purposeChange, s.accountLocale(ctx, accountID))
+}
+
+// ConfirmChange verifies code for (accountID, newEmail) and atomically replaces the
+// account's confirmed email with newEmail, freeing the old address. When newEmail is
+// already confirmed by another account it refuses with ErrEmailTaken (surfaced to the
+// user as a non-disclosing "check the address or contact support"), never merging; when
+// the account already owns newEmail it is an idempotent no-op. It returns the usual
+// confirm-code errors (ErrNoPendingCode, ErrCodeExpired, ErrTooManyAttempts,
+// ErrCodeMismatch) and the updated account on success.
+func (s *EmailService) ConfirmChange(ctx context.Context, accountID uuid.UUID, newEmail, code string) (Account, error) {
+	addr, err := normalizeEmail(newEmail)
+	if err != nil {
+		return Account{}, err
+	}
+	conf, err := s.verifyPendingCode(ctx, accountID, addr, code)
+	if err != nil {
+		return Account{}, err
+	}
+	owner, ok, err := s.store.confirmedEmailAccount(ctx, addr)
+	if err != nil {
+		return Account{}, err
+	}
+	if ok && owner != accountID {
+		return Account{}, ErrEmailTaken
+	}
+	if ok && owner == accountID {
+		if err := s.store.consumeConfirmation(ctx, conf.id, s.now()); err != nil {
+			return Account{}, err
+		}
+		return s.store.GetByID(ctx, accountID)
+	}
+	if err := s.store.replaceEmailIdentity(ctx, conf.id, accountID, addr, s.now()); err != nil {
+		return Account{}, err
+	}
+	return s.store.GetByID(ctx, accountID)
+}
+
 // verifyPendingCode loads and checks the pending confirm-code for (accountID,
 // addr), counting a wrong attempt. It returns the confirmation on success.
 func (s *EmailService) verifyPendingCode(ctx context.Context, accountID uuid.UUID, addr, code string) (emailConfirmation, error) {

backend/internal/server/handlers.go

@@ -74,6 +74,12 @@ func (s *Server) registerRoutes() {
 		u.POST("/link/email/merge", s.handleLinkEmailMerge)
 		u.POST("/link/telegram", s.handleLinkTelegram)
 		u.POST("/link/telegram/merge", s.handleLinkTelegramMerge)
+		u.POST("/link/unlink", s.handleUnlink)
+		// Change the account's confirmed email: mail a code to the new address, then
+		// atomically switch on confirm (a new address owned by another account is
+		// refused without disclosure, never merged).
+		u.POST("/link/email/change/request", s.handleChangeEmailRequest)
+		u.POST("/link/email/change/confirm", s.handleChangeEmailConfirm)
 	}
 	if s.games != nil {
 		u.GET("/games", s.handleListGames)
@@ -231,6 +237,8 @@ func statusForError(err error) (int, string) {
 		return http.StatusUnprocessableEntity, "illegal_play"
 	case errors.Is(err, account.ErrEmailTaken), errors.Is(err, account.ErrIdentityTaken):
 		return http.StatusConflict, "email_taken"
+	case errors.Is(err, account.ErrLastIdentity):
+		return http.StatusConflict, "last_identity"
 	case errors.Is(err, accountmerge.ErrActiveGameConflict):
 		return http.StatusConflict, "merge_active_game_conflict"
 	case errors.Is(err, account.ErrInvalidEmail):

backend/internal/server/handlers_link.go

@@ -7,6 +7,7 @@ import (
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
 
+	"scrabble/backend/internal/account"
 	"scrabble/backend/internal/link"
 )
 
@@ -66,6 +67,89 @@ func (s *Server) handleLinkEmailRequest(c *gin.Context) {
 	c.JSON(http.StatusOK, okResponse{OK: true})
 }
 
+// unlinkBody carries the provider kind to detach.
+type unlinkBody struct {
+	Kind string `json:"kind"`
+}
+
+// handleUnlink detaches a platform identity (telegram or vk) from the caller's
+// account, refusing to remove the last identity (ErrLastIdentity). Email is never
+// unlinked — it is replaced through the change-email flow — so an email kind is
+// rejected. It returns the refreshed profile so the client updates its controls.
+func (s *Server) handleUnlink(c *gin.Context) {
+	uid, ok := userID(c)
+	if !ok {
+		abortBadRequest(c, "missing identity")
+		return
+	}
+	var req unlinkBody
+	if err := c.ShouldBindJSON(&req); err != nil {
+		abortBadRequest(c, "invalid request body")
+		return
+	}
+	if req.Kind != account.KindTelegram && req.Kind != account.KindVK {
+		abortBadRequest(c, "only telegram or vk can be unlinked")
+		return
+	}
+	ctx := c.Request.Context()
+	if err := s.accounts.RemoveIdentity(ctx, uid, req.Kind); err != nil {
+		s.abortErr(c, err)
+		return
+	}
+	acc, err := s.accounts.GetByID(ctx, uid)
+	if err != nil {
+		s.abortErr(c, err)
+		return
+	}
+	r := s.profileResponse(ctx, acc)
+	c.JSON(http.StatusOK, linkResultResponse{Status: "unlinked", Profile: &r})
+}
+
+// handleChangeEmailRequest mails a confirm-code to a new address for an authenticated
+// email change. Like the link request it never signals "taken" up front — a conflict is
+// only revealed (non-disclosingly) at confirm.
+func (s *Server) handleChangeEmailRequest(c *gin.Context) {
+	uid, ok := userID(c)
+	if !ok {
+		abortBadRequest(c, "missing identity")
+		return
+	}
+	var req linkEmailRequestBody
+	if err := c.ShouldBindJSON(&req); err != nil {
+		abortBadRequest(c, "invalid request body")
+		return
+	}
+	if err := s.emails.RequestChangeCode(c.Request.Context(), uid, req.Email); err != nil {
+		s.abortErr(c, err)
+		return
+	}
+	c.JSON(http.StatusOK, okResponse{OK: true})
+}
+
+// handleChangeEmailConfirm verifies the code and atomically switches the account to the
+// new address, returning the refreshed profile. A new address confirmed by another
+// account is refused (ErrEmailTaken → the non-disclosing message), never merged.
+func (s *Server) handleChangeEmailConfirm(c *gin.Context) {
+	uid, ok := userID(c)
+	if !ok {
+		abortBadRequest(c, "missing identity")
+		return
+	}
+	var req linkEmailConfirmBody
+	if err := c.ShouldBindJSON(&req); err != nil {
+		abortBadRequest(c, "invalid request body")
+		return
+	}
+	ctx := c.Request.Context()
+	acc, err := s.emails.ConfirmChange(ctx, uid, req.Email, req.Code)
+	if err != nil {
+		s.abortErr(c, err)
+		return
+	}
+	r := s.profileResponse(ctx, acc)
+	c.JSON(http.StatusOK, linkResultResponse{Status: "changed", Profile: &r})
+}
+
 // handleLinkEmailConfirm verifies the code and binds a free email or reports a
 // required merge.
 func (s *Server) handleLinkEmailConfirm(c *gin.Context) {

gateway/internal/backendclient/api_social.go

@@ -335,6 +335,31 @@ func (c *Client) LinkTelegramMerge(ctx context.Context, userID, externalID strin
 	return out, err
 }
 
+// ChangeEmailRequest asks the backend to mail a confirm-code to a new address for an
+// authenticated email change.
+func (c *Client) ChangeEmailRequest(ctx context.Context, userID, email string) error {
+	return c.do(ctx, http.MethodPost, "/api/v1/user/link/email/change/request", userID, "",
+		map[string]string{"email": email}, nil)
+}
+
+// ChangeEmailConfirm verifies the code and atomically switches the account's email,
+// returning the refreshed profile in the result.
+func (c *Client) ChangeEmailConfirm(ctx context.Context, userID, email, code string) (LinkResultResp, error) {
+	var out LinkResultResp
+	err := c.do(ctx, http.MethodPost, "/api/v1/user/link/email/change/confirm", userID, "",
+		map[string]string{"email": email, "code": code}, &out)
+	return out, err
+}
+
+// LinkUnlink detaches a platform identity (kind = "telegram" | "vk") from the caller
+// and returns the refreshed profile in the result.
+func (c *Client) LinkUnlink(ctx context.Context, userID, kind string) (LinkResultResp, error) {
+	var out LinkResultResp
+	err := c.do(ctx, http.MethodPost, "/api/v1/user/link/unlink", userID, "",
+		map[string]string{"kind": kind}, &out)
+	return out, err
+}
+
 // Stats returns the caller's lifetime statistics.
 func (c *Client) Stats(ctx context.Context, userID string) (StatsResp, error) {
 	var out StatsResp

gateway/internal/transcode/transcode_link.go

@@ -13,11 +13,14 @@ import (
 // authenticated. The merge ops are the explicit irreversible step, gated in the UI
 // after a merge_required confirm.
 const (
-	MsgLinkEmailRequest  = "link.email.request"
-	MsgLinkEmailConfirm  = "link.email.confirm"
-	MsgLinkEmailMerge    = "link.email.merge"
-	MsgLinkTelegram      = "link.telegram.confirm"
-	MsgLinkTelegramMerge = "link.telegram.merge"
+	MsgLinkEmailRequest   = "link.email.request"
+	MsgLinkEmailConfirm   = "link.email.confirm"
+	MsgLinkEmailMerge     = "link.email.merge"
+	MsgLinkTelegram       = "link.telegram.confirm"
+	MsgLinkTelegramMerge  = "link.telegram.merge"
+	MsgLinkUnlink         = "link.unlink"
+	MsgEmailChangeRequest = "link.email.change.request"
+	MsgEmailChangeConfirm = "link.email.change.confirm"
 )
 
 // registerLinkOps adds the linking & merge operations. The telegram ops need the
@@ -26,6 +29,9 @@ func registerLinkOps(r *Registry, backend *backendclient.Client, tg TelegramVali
 	r.ops[MsgLinkEmailRequest] = Op{Handler: linkEmailRequestHandler(backend), Auth: true, Email: true}
 	r.ops[MsgLinkEmailConfirm] = Op{Handler: linkEmailConfirmHandler(backend), Auth: true, Email: true}
 	r.ops[MsgLinkEmailMerge] = Op{Handler: linkEmailMergeHandler(backend), Auth: true, Email: true}
+	r.ops[MsgLinkUnlink] = Op{Handler: linkUnlinkHandler(backend), Auth: true}
+	r.ops[MsgEmailChangeRequest] = Op{Handler: changeEmailRequestHandler(backend), Auth: true, Email: true}
+	r.ops[MsgEmailChangeConfirm] = Op{Handler: changeEmailConfirmHandler(backend), Auth: true, Email: true}
 	if tg != nil {
 		r.ops[MsgLinkTelegram] = Op{Handler: linkTelegramHandler(backend, tg, false), Auth: true}
 		r.ops[MsgLinkTelegramMerge] = Op{Handler: linkTelegramHandler(backend, tg, true), Auth: true}
@@ -64,6 +70,43 @@ func linkEmailMergeHandler(backend *backendclient.Client) Handler {
 	}
 }
 
+// changeEmailRequestHandler mails a confirm-code to a new address for an email change.
+func changeEmailRequestHandler(backend *backendclient.Client) Handler {
+	return func(ctx context.Context, req Request) ([]byte, error) {
+		in := fb.GetRootAsLinkEmailRequest(req.Payload, 0)
+		if err := backend.ChangeEmailRequest(ctx, req.UserID, string(in.Email())); err != nil {
+			return nil, err
+		}
+		return encodeAck(true), nil
+	}
+}
+
+// changeEmailConfirmHandler verifies the code and switches the account's email, returning
+// the refreshed link result (status "changed" + the updated profile).
+func changeEmailConfirmHandler(backend *backendclient.Client) Handler {
+	return func(ctx context.Context, req Request) ([]byte, error) {
+		in := fb.GetRootAsLinkEmailConfirm(req.Payload, 0)
+		res, err := backend.ChangeEmailConfirm(ctx, req.UserID, string(in.Email()), string(in.Code()))
+		if err != nil {
+			return nil, err
+		}
+		return encodeLinkResult(res), nil
+	}
+}
+
+// linkUnlinkHandler detaches a platform identity (telegram|vk) from the caller and
+// returns the refreshed link result (status "unlinked" + the updated profile).
+func linkUnlinkHandler(backend *backendclient.Client) Handler {
+	return func(ctx context.Context, req Request) ([]byte, error) {
+		in := fb.GetRootAsLinkUnlinkRequest(req.Payload, 0)
+		res, err := backend.LinkUnlink(ctx, req.UserID, string(in.Kind()))
+		if err != nil {
+			return nil, err
+		}
+		return encodeLinkResult(res), nil
+	}
+}
+
 // linkTelegramHandler validates Login Widget data via the connector and then calls
 // the backend's link or merge endpoint with the trusted Telegram external id.
 func linkTelegramHandler(backend *backendclient.Client, tg TelegramValidator, merge bool) Handler {

pkg/fbs/scrabble.fbs

@@ -501,6 +501,12 @@ table LinkTelegramRequest {
   data:string;
 }
 
+// LinkUnlinkRequest detaches a platform identity (kind = "telegram" | "vk") from the
+// caller's account; email is never unlinked (it is changed).
+table LinkUnlinkRequest {
+  kind:string;
+}
+
 // LinkResult is the unified result of a confirm or merge step. status is "linked"
 // (bound to the caller), "merge_required" (the identity belongs to another account —
 // the secondary_* fields summarise it for the irreversible confirmation), or

pkg/fbs/scrabblefb/LinkUnlinkRequest.go

@@ -0,0 +1,60 @@
+// Code generated by the FlatBuffers compiler. DO NOT EDIT.
+
+package scrabblefb
+
+import (
+	flatbuffers "github.com/google/flatbuffers/go"
+)
+
+type LinkUnlinkRequest struct {
+	_tab flatbuffers.Table
+}
+
+func GetRootAsLinkUnlinkRequest(buf []byte, offset flatbuffers.UOffsetT) *LinkUnlinkRequest {
+	n := flatbuffers.GetUOffsetT(buf[offset:])
+	x := &LinkUnlinkRequest{}
+	x.Init(buf, n+offset)
+	return x
+}
+
+func FinishLinkUnlinkRequestBuffer(builder *flatbuffers.Builder, offset flatbuffers.UOffsetT) {
+	builder.Finish(offset)
+}
+
+func GetSizePrefixedRootAsLinkUnlinkRequest(buf []byte, offset flatbuffers.UOffsetT) *LinkUnlinkRequest {
+	n := flatbuffers.GetUOffsetT(buf[offset+flatbuffers.SizeUint32:])
+	x := &LinkUnlinkRequest{}
+	x.Init(buf, n+offset+flatbuffers.SizeUint32)
+	return x
+}
+
+func FinishSizePrefixedLinkUnlinkRequestBuffer(builder *flatbuffers.Builder, offset flatbuffers.UOffsetT) {
+	builder.FinishSizePrefixed(offset)
+}
+
+func (rcv *LinkUnlinkRequest) Init(buf []byte, i flatbuffers.UOffsetT) {
+	rcv._tab.Bytes = buf
+	rcv._tab.Pos = i
+}
+
+func (rcv *LinkUnlinkRequest) Table() flatbuffers.Table {
+	return rcv._tab
+}
+
+func (rcv *LinkUnlinkRequest) Kind() []byte {
+	o := flatbuffers.UOffsetT(rcv._tab.Offset(4))
+	if o != 0 {
+		return rcv._tab.ByteVector(o + rcv._tab.Pos)
+	}
+	return nil
+}
+
+func LinkUnlinkRequestStart(builder *flatbuffers.Builder) {
+	builder.StartObject(1)
+}
+func LinkUnlinkRequestAddKind(builder *flatbuffers.Builder, kind flatbuffers.UOffsetT) {
+	builder.PrependUOffsetTSlot(0, flatbuffers.UOffsetT(kind), 0)
+}
+func LinkUnlinkRequestEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT {
+	return builder.EndObject()
+}

ui/src/gen/fbs/scrabblefb.ts

@@ -51,6 +51,7 @@ export { LinkEmailConfirm } from './scrabblefb/link-email-confirm.js';
 export { LinkEmailRequest } from './scrabblefb/link-email-request.js';
 export { LinkResult } from './scrabblefb/link-result.js';
 export { LinkTelegramRequest } from './scrabblefb/link-telegram-request.js';
+export { LinkUnlinkRequest } from './scrabblefb/link-unlink-request.js';
 export { MatchFoundEvent } from './scrabblefb/match-found-event.js';
 export { MatchResult } from './scrabblefb/match-result.js';
 export { MoveRecord } from './scrabblefb/move-record.js';

ui/src/gen/fbs/scrabblefb/link-unlink-request.ts

@@ -0,0 +1,48 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+import * as flatbuffers from 'flatbuffers';
+
+export class LinkUnlinkRequest {
+  bb: flatbuffers.ByteBuffer|null = null;
+  bb_pos = 0;
+  __init(i:number, bb:flatbuffers.ByteBuffer):LinkUnlinkRequest {
+  this.bb_pos = i;
+  this.bb = bb;
+  return this;
+}
+
+static getRootAsLinkUnlinkRequest(bb:flatbuffers.ByteBuffer, obj?:LinkUnlinkRequest):LinkUnlinkRequest {
+  return (obj || new LinkUnlinkRequest()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+static getSizePrefixedRootAsLinkUnlinkRequest(bb:flatbuffers.ByteBuffer, obj?:LinkUnlinkRequest):LinkUnlinkRequest {
+  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
+  return (obj || new LinkUnlinkRequest()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
+}
+
+kind():string|null
+kind(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
+kind(optionalEncoding?:any):string|Uint8Array|null {
+  const offset = this.bb!.__offset(this.bb_pos, 4);
+  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
+}
+
+static startLinkUnlinkRequest(builder:flatbuffers.Builder) {
+  builder.startObject(1);
+}
+
+static addKind(builder:flatbuffers.Builder, kindOffset:flatbuffers.Offset) {
+  builder.addFieldOffset(0, kindOffset, 0);
+}
+
+static endLinkUnlinkRequest(builder:flatbuffers.Builder):flatbuffers.Offset {
+  const offset = builder.endObject();
+  return offset;
+}
+
+static createLinkUnlinkRequest(builder:flatbuffers.Builder, kindOffset:flatbuffers.Offset):flatbuffers.Offset {
+  LinkUnlinkRequest.startLinkUnlinkRequest(builder);
+  LinkUnlinkRequest.addKind(builder, kindOffset);
+  return LinkUnlinkRequest.endLinkUnlinkRequest(builder);
+}
+}