diff --git a/modules/sdk-core/src/bitgo/utils/tss/baseTSSUtils.ts b/modules/sdk-core/src/bitgo/utils/tss/baseTSSUtils.ts
index 81067d0fee..a160fb8ef9 100644
--- a/modules/sdk-core/src/bitgo/utils/tss/baseTSSUtils.ts
+++ b/modules/sdk-core/src/bitgo/utils/tss/baseTSSUtils.ts
@@ -15,6 +15,9 @@ import {
   CreateBitGoKeychainParamsBase,
   CreateKeychainParamsBase,
   CustomCommitmentGeneratingFunction,
+  CustomEddsaMPCv2SigningRound1GeneratingFunction,
+  CustomEddsaMPCv2SigningRound2GeneratingFunction,
+  CustomEddsaMPCv2SigningRound3GeneratingFunction,
   CustomGShareGeneratingFunction,
   CustomKShareGeneratingFunction,
   CustomMPCv2SigningRound1GeneratingFunction,
@@ -288,6 +291,16 @@ export default class BaseTssUtils<KeyShare> extends MpcUtils implements ITssUtil
     throw new Error('Method not implemented.');
   }
 
+  signEddsaMPCv2TssUsingExternalSigner(
+    params: TSSParams | TSSParamsForMessage,
+    externalSignerEddsaMPCv2SigningRound1Generator: CustomEddsaMPCv2SigningRound1GeneratingFunction,
+    externalSignerEddsaMPCv2SigningRound2Generator: CustomEddsaMPCv2SigningRound2GeneratingFunction,
+    externalSignerEddsaMPCv2SigningRound3Generator: CustomEddsaMPCv2SigningRound3GeneratingFunction,
+    requestType?: RequestType
+  ): Promise<TxRequest> {
+    throw new Error('Method not implemented.');
+  }
+
   /**
    * Create an Commitment (User to BitGo) share from an unsigned transaction and private user signing material
    * EDDSA only
diff --git a/modules/sdk-core/src/bitgo/utils/tss/baseTypes.ts b/modules/sdk-core/src/bitgo/utils/tss/baseTypes.ts
index 74aa27ea0c..87b20aaea7 100644
--- a/modules/sdk-core/src/bitgo/utils/tss/baseTypes.ts
+++ b/modules/sdk-core/src/bitgo/utils/tss/baseTypes.ts
@@ -92,6 +92,9 @@ export enum ShareType {
   MPCv2Round1 = 'MPCv2Round1',
   MPCv2Round2 = 'MPCv2Round2',
   MPCv2Round3 = 'MPCv2Round3',
+  EddsaMPCv2Round1 = 'EddsaMPCv2Round1',
+  EddsaMPCv2Round2 = 'EddsaMPCv2Round2',
+  EddsaMPCv2Round3 = 'EddsaMPCv2Round3',
 }
 
 export enum MPCType {
@@ -189,6 +192,36 @@ export interface CustomMPCv2SigningRound3GeneratingFunction {
   }>;
 }
 
+export interface CustomEddsaMPCv2SigningRound1GeneratingFunction {
+  (params: { txRequest: TxRequest }): Promise<{
+    signatureShareRound1: SignatureShareRecord;
+    encryptedRound1Session: string;
+    userGpgPubKey: string;
+    encryptedUserGpgPrvKey: string;
+  }>;
+}
+
+export interface CustomEddsaMPCv2SigningRound2GeneratingFunction {
+  (params: {
+    txRequest: TxRequest;
+    bitgoPublicGpgKey: string;
+    encryptedUserGpgPrvKey: string;
+    encryptedRound1Session: string;
+  }): Promise<{
+    signatureShareRound2: SignatureShareRecord;
+    encryptedRound2Session: string;
+  }>;
+}
+
+export interface CustomEddsaMPCv2SigningRound3GeneratingFunction {
+  (params: {
+    txRequest: TxRequest;
+    bitgoPublicGpgKey: string;
+    encryptedUserGpgPrvKey: string;
+    encryptedRound2Session: string;
+  }): Promise<{ signatureShareRound3: SignatureShareRecord }>;
+}
+
 export enum TokenType {
   ERC721 = 'ERC721',
   ERC1155 = 'ERC1155',
diff --git a/modules/sdk-core/src/bitgo/wallet/iWallet.ts b/modules/sdk-core/src/bitgo/wallet/iWallet.ts
index 848f465a77..f98e985d7d 100644
--- a/modules/sdk-core/src/bitgo/wallet/iWallet.ts
+++ b/modules/sdk-core/src/bitgo/wallet/iWallet.ts
@@ -18,6 +18,9 @@ import { IGoStakingWallet, IStakingWallet } from '../staking';
 import { ITradingAccount } from '../trading';
 import {
   CustomCommitmentGeneratingFunction,
+  CustomEddsaMPCv2SigningRound1GeneratingFunction,
+  CustomEddsaMPCv2SigningRound2GeneratingFunction,
+  CustomEddsaMPCv2SigningRound3GeneratingFunction,
   CustomGShareGeneratingFunction,
   CustomKShareGeneratingFunction,
   CustomMPCv2SigningRound1GeneratingFunction,
@@ -323,6 +326,9 @@ export interface WalletSignTransactionOptions extends WalletSignBaseOptions {
   customMPCv2SigningRound1GenerationFunction?: CustomMPCv2SigningRound1GeneratingFunction;
   customMPCv2SigningRound2GenerationFunction?: CustomMPCv2SigningRound2GeneratingFunction;
   customMPCv2SigningRound3GenerationFunction?: CustomMPCv2SigningRound3GeneratingFunction;
+  customEddsaMPCv2SigningRound1GenerationFunction?: CustomEddsaMPCv2SigningRound1GeneratingFunction;
+  customEddsaMPCv2SigningRound2GenerationFunction?: CustomEddsaMPCv2SigningRound2GeneratingFunction;
+  customEddsaMPCv2SigningRound3GenerationFunction?: CustomEddsaMPCv2SigningRound3GeneratingFunction;
   apiVersion?: ApiVersion;
   multisigTypeVersion?: 'MPCv2';
   walletPassphrase?: string;