feat(sdk-core): define EdDSA MPCv2 key gen callback types

Add EddsaMPCv2KeyGenCallbacks interface and per-round callback type
definitions to iWallets.ts, following the ECDSA MPCv2 pattern. Also
define EddsaMPCv2SignedMessage (the PGP-signed DKG message type) and
export all new types from index.ts.

These types are the contract between the SDK orchestrator
(createKeychainsWithExternalSigner, WCI-916) and external signer
implementations (ME callback factory, WCI-895). Defining them first
allows downstream tickets to reference a stable interface.

Ticket: WCI-894
Session-Id: 2c2acd0f-2bbf-4fa3-a7a6-2026d16e3557
Task-Id: 9f88b5c5-449c-48b4-9f08-6de39e0c1c19

Author: Marzooqa

modules/sdk-core/src/bitgo/wallet/iWallets.ts

@@ -178,6 +178,62 @@ export interface EddsaKeyGenCallbacks {
   finalizeCallback: EddsaKeyGenFinalizeCallback;
 }
 
+/** A PGP-signed DKG message produced by a Silence Labs MPS party. */
+export interface EddsaMPCv2SignedMessage {
+  message: string;
+  signature: string;
+}
+
+export type EddsaMPCv2KeyGenInitializeCallback = (params: {
+  enterprise: string;
+  bitgoPublicGpgKey: string;
+}) => Promise<{
+  userGpgPublicKey: string;
+  backupGpgPublicKey: string;
+  userState: ExternalSignerMpcState;
+  backupState: ExternalSignerMpcState;
+}>;
+
+export type EddsaMPCv2KeyGenRound1Callback = (params: {
+  bitgoPublicGpgKey: string;
+  userGpgPublicKey: string;
+  backupGpgPublicKey: string;
+  userState: ExternalSignerMpcState;
+  backupState: ExternalSignerMpcState;
+}) => Promise<{
+  userSignedMsg1: EddsaMPCv2SignedMessage;
+  backupSignedMsg1: EddsaMPCv2SignedMessage;
+  userState: ExternalSignerMpcState;
+  backupState: ExternalSignerMpcState;
+}>;
+
+export type EddsaMPCv2KeyGenRound2Callback = (params: {
+  bitgoMsg1: EddsaMPCv2SignedMessage;
+  userSignedMsg1: EddsaMPCv2SignedMessage;
+  backupSignedMsg1: EddsaMPCv2SignedMessage;
+  userState: ExternalSignerMpcState;
+  backupState: ExternalSignerMpcState;
+}) => Promise<{
+  userSignedMsg2: EddsaMPCv2SignedMessage;
+  backupSignedMsg2: EddsaMPCv2SignedMessage;
+  userState: ExternalSignerMpcState;
+  backupState: ExternalSignerMpcState;
+}>;
+
+export type EddsaMPCv2KeyGenFinalizeCallback = (params: {
+  bitgoMsg2: EddsaMPCv2SignedMessage;
+  bitgoCommonKeychain: string;
+  userState: ExternalSignerMpcState;
+  backupState: ExternalSignerMpcState;
+}) => Promise<{ commonKeychain: string }>;
+
+export interface EddsaMPCv2KeyGenCallbacks {
+  initializeCallback: EddsaMPCv2KeyGenInitializeCallback;
+  round1Callback: EddsaMPCv2KeyGenRound1Callback;
+  round2Callback: EddsaMPCv2KeyGenRound2Callback;
+  finalizeCallback: EddsaMPCv2KeyGenFinalizeCallback;
+}
+
 export interface GenerateWalletOptions {
   label?: string;
   passphrase?: string;

modules/sdk-core/src/index.ts

@@ -19,6 +19,12 @@ export type {
   EddsaKeyGenFinalizeResult,
   ExternalSignerKeyShare,
   ExternalSignerMpcState,
+  EddsaMPCv2SignedMessage,
+  EddsaMPCv2KeyGenCallbacks,
+  EddsaMPCv2KeyGenInitializeCallback,
+  EddsaMPCv2KeyGenRound1Callback,
+  EddsaMPCv2KeyGenRound2Callback,
+  EddsaMPCv2KeyGenFinalizeCallback,
 } from './bitgo/wallet/iWallets';
 import { EcdsaUtils } from './bitgo/utils/tss/ecdsa/ecdsa';
 export { EcdsaUtils };