diff --git a/solidity/contracts/isms/MultisigIsm.sol b/solidity/contracts/isms/MultisigIsm.sol
index ae7e4c354..901ae1ac0 100644
--- a/solidity/contracts/isms/MultisigIsm.sol
+++ b/solidity/contracts/isms/MultisigIsm.sol
@@ -25,6 +25,10 @@ contract MultisigIsm is IMultisigIsm, Ownable {
     using MultisigIsmMetadata for bytes;
     using MerkleLib for MerkleLib.Tree;
 
+    // ============ Constants ============
+
+    uint8 public constant moduleType = 3;
+
     // ============ Mutable Storage ============
 
     /// @notice The validator threshold for each remote domain.
@@ -219,6 +223,25 @@ contract MultisigIsm is IMultisigIsm, Ownable {
         return _validators;
     }
 
+    /**
+     * @notice Returns the set of validators responsible for verifying _message
+     * and the number of signatures required
+     * @dev Can change based on the content of _message
+     * @param _message Hyperlane formatted interchain message
+     * @return validators The array of validator addresses
+     * @return threshold The number of validator signatures needed
+     */
+    function validatorsAndThreshold(bytes calldata _message)
+        external
+        view
+        returns (address[] memory, uint8)
+    {
+        uint32 _origin = _message.origin();
+        address[] memory _validators = validators(_origin);
+        uint8 _threshold = threshold[_origin];
+        return (_validators, _threshold);
+    }
+
     /**
      * @notice Returns the number of validators enrolled in the validator set.
      * @param _domain The remote domain of the validator set.
diff --git a/solidity/contracts/test/TestIsm.sol b/solidity/contracts/test/TestIsm.sol
index 9e32a0c45..03f0f4cd1 100644
--- a/solidity/contracts/test/TestIsm.sol
+++ b/solidity/contracts/test/TestIsm.sol
@@ -4,6 +4,7 @@ pragma solidity >=0.8.0;
 import {IInterchainSecurityModule} from "../../interfaces/IInterchainSecurityModule.sol";
 
 contract TestIsm is IInterchainSecurityModule {
+    uint8 public constant moduleType = 0;
     bool public accept;
 
     function setAccept(bool _val) external {
diff --git a/solidity/interfaces/IInterchainSecurityModule.sol b/solidity/interfaces/IInterchainSecurityModule.sol
index 3a568ebf8..a30f7f8e9 100644
--- a/solidity/interfaces/IInterchainSecurityModule.sol
+++ b/solidity/interfaces/IInterchainSecurityModule.sol
@@ -2,7 +2,21 @@
 pragma solidity >=0.6.11;
 
 interface IInterchainSecurityModule {
-    // Called by the Mailbox to determine whether or not the message should be accepted.
+    /**
+     * @notice Returns an enum that represents the type of security model
+     * encoded by this ISM.
+     * @dev Relayers infer how to fetch and format metadata.
+     */
+    function moduleType() external view returns (uint8);
+
+    /**
+     * @notice Defines a security model responsible for verifying interchain
+     * messages based on the provided metadata.
+     * @param _metadata Off-chain metadata provided by a relayer, specific to
+     * the security model encoded by the module (e.g. validator signatures)
+     * @param _message Hyperlane encoded interchain message
+     * @return True if the message was verified
+     */
     function verify(bytes calldata _metadata, bytes calldata _message)
         external
         returns (bool);
diff --git a/solidity/interfaces/IMultisigIsm.sol b/solidity/interfaces/IMultisigIsm.sol
index 04fe8a585..427f2421b 100644
--- a/solidity/interfaces/IMultisigIsm.sol
+++ b/solidity/interfaces/IMultisigIsm.sol
@@ -4,15 +4,16 @@ pragma solidity >=0.6.0;
 import {IInterchainSecurityModule} from "./IInterchainSecurityModule.sol";
 
 interface IMultisigIsm is IInterchainSecurityModule {
-    function isEnrolled(uint32 _domain, address _validator)
+    /**
+     * @notice Returns the set of validators responsible for verifying _message
+     * and the number of signatures required
+     * @dev Can change based on the content of _message
+     * @param _message Hyperlane formatted interchain message
+     * @return validators The array of validator addresses
+     * @return threshold The number of validator signatures needed
+     */
+    function validatorsAndThreshold(bytes calldata _message)
         external
         view
-        returns (bool);
-
-    function threshold(uint32 _domain) external view returns (uint8);
-
-    function validators(uint32 _domain)
-        external
-        view
-        returns (address[] memory);
+        returns (address[] memory validators, uint8 threshold);
 }
diff --git a/solidity/test/isms/multisigIsm.test.ts b/solidity/test/isms/multisigIsm.test.ts
index eed76480f..da22c1482 100644
--- a/solidity/test/isms/multisigIsm.test.ts
+++ b/solidity/test/isms/multisigIsm.test.ts
@@ -3,7 +3,7 @@ import { SignerWithAddress } from '@nomiclabs/hardhat-ethers/signers';
 import { expect } from 'chai';
 import { ethers } from 'hardhat';
 
-import { Validator, utils } from '@hyperlane-xyz/utils';
+import { Validator, types, utils } from '@hyperlane-xyz/utils';
 
 import {
   TestMailbox,
@@ -13,6 +13,7 @@ import {
   TestRecipient__factory,
 } from '../../types';
 import {
+  dispatchMessage,
   dispatchMessageAndReturnMetadata,
   getCommitment,
   signCheckpoint,
@@ -54,6 +55,14 @@ describe('MultisigIsm', async () => {
     });
   });
 
+  describe('#moduleType', () => {
+    it('returns the correct type', async () => {
+      expect(await multisigIsm.moduleType()).to.equal(
+        types.InterchainSecurityModuleType.MULTISIG,
+      );
+    });
+  });
+
   describe('#enrollValidators', () => {
     let validatorAddresses: string[];
     const domains = [ORIGIN_DOMAIN, DESTINATION_DOMAIN];
@@ -317,6 +326,32 @@ describe('MultisigIsm', async () => {
     });
   });
 
+  describe('#validatorsAndThreshold', () => {
+    const threshold = 7;
+    let message: string;
+    beforeEach(async () => {
+      await multisigIsm.enrollValidators(
+        [ORIGIN_DOMAIN],
+        [validators.map((v) => v.address)],
+      );
+      await multisigIsm.setThreshold(ORIGIN_DOMAIN, threshold);
+      const dispatch = await dispatchMessage(
+        mailbox,
+        DESTINATION_DOMAIN,
+        utils.addressToBytes32(multisigIsm.address),
+        'hello',
+      );
+      message = dispatch.message;
+    });
+
+    it('returns the validators and threshold', async () => {
+      expect(await multisigIsm.validatorsAndThreshold(message)).to.deep.equal([
+        validators.map((v) => v.address),
+        threshold,
+      ]);
+    });
+  });
+
   describe('#validatorCount', () => {
     beforeEach(async () => {
       // Must be done sequentially so gas estimation is correct.
diff --git a/typescript/helloworld b/typescript/helloworld
deleted file mode 160000
index 646f1e7be..000000000
--- a/typescript/helloworld
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 646f1e7beb18a77e5ca2535dba130f75793aea0f
diff --git a/typescript/token b/typescript/token
deleted file mode 160000
index a294fdf5e..000000000
--- a/typescript/token
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit a294fdf5ea498a018178fd90744c9c09276d9686
diff --git a/typescript/utils/src/types.ts b/typescript/utils/src/types.ts
index 248d175ce..c72e80e72 100644
--- a/typescript/utils/src/types.ts
+++ b/typescript/utils/src/types.ts
@@ -58,3 +58,7 @@ export type ParsedMultisigIsmMetadata = {
   signatures: ethers.utils.BytesLike[];
   validators: ethers.utils.BytesLike[];
 };
+
+export enum InterchainSecurityModuleType {
+  MULTISIG = 3,
+}
diff --git a/yarn.lock b/yarn.lock
index 2eb97b493..d59f2229b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3713,71 +3713,16 @@ __metadata:
   languageName: unknown
   linkType: soft
 
-"@hyperlane-xyz/helloworld@1.0.0-beta3, @hyperlane-xyz/helloworld@workspace:typescript/helloworld":
-  version: 0.0.0-use.local
-  resolution: "@hyperlane-xyz/helloworld@workspace:typescript/helloworld"
+"@hyperlane-xyz/helloworld@npm:1.0.0-beta3":
+  version: 1.0.0-beta3
+  resolution: "@hyperlane-xyz/helloworld@npm:1.0.0-beta3"
   dependencies:
     "@hyperlane-xyz/sdk": 1.0.0-beta3
-    "@nomiclabs/hardhat-ethers": ^2.0.5
-    "@nomiclabs/hardhat-waffle": ^2.0.2
     "@openzeppelin/contracts-upgradeable": ^4.8.0
-    "@trivago/prettier-plugin-sort-imports": ^3.2.0
-    "@typechain/ethers-v5": 10.0.0
-    "@typechain/hardhat": ^6.0.0
-    "@types/mocha": ^9.1.0
-    "@typescript-eslint/eslint-plugin": ^5.27.0
-    "@typescript-eslint/parser": ^5.27.0
-    chai: ^4.3.0
-    eslint: ^8.16.0
-    eslint-config-prettier: ^8.5.0
-    ethereum-waffle: ^3.4.4
     ethers: ^5.6.8
-    hardhat: ^2.8.4
-    hardhat-gas-reporter: ^1.0.7
-    prettier: ^2.4.1
-    prettier-plugin-solidity: ^1.0.0-beta.5
-    solhint: ^3.3.2
-    solhint-plugin-prettier: ^0.0.5
-    solidity-coverage: ^0.7.14
-    ts-node: ^10.8.0
-    typechain: 8.0.0
-    typescript: ^4.7.2
-  languageName: unknown
-  linkType: soft
-
-"@hyperlane-xyz/hyperlane-token@workspace:typescript/token":
-  version: 0.0.0-use.local
-  resolution: "@hyperlane-xyz/hyperlane-token@workspace:typescript/token"
-  dependencies:
-    "@hyperlane-xyz/core": 1.0.0-beta3
-    "@hyperlane-xyz/sdk": 1.0.0-beta3
-    "@hyperlane-xyz/utils": 1.0.0-beta3
-    "@nomiclabs/hardhat-ethers": ^2.0.5
-    "@nomiclabs/hardhat-waffle": ^2.0.2
-    "@openzeppelin/contracts-upgradeable": ^4.8.0
-    "@trivago/prettier-plugin-sort-imports": ^3.2.0
-    "@typechain/ethers-v5": 10.0.0
-    "@typechain/hardhat": ^6.0.0
-    "@types/mocha": ^9.1.0
-    "@typescript-eslint/eslint-plugin": ^5.27.0
-    "@typescript-eslint/parser": ^5.27.0
-    chai: ^4.3.0
-    eslint: ^8.16.0
-    eslint-config-prettier: ^8.5.0
-    ethereum-waffle: ^3.4.4
-    ethers: ^5.6.8
-    hardhat: ^2.8.4
-    hardhat-gas-reporter: ^1.0.7
-    prettier: ^2.4.1
-    prettier-plugin-solidity: ^1.0.0-beta.5
-    solhint: ^3.3.2
-    solhint-plugin-prettier: ^0.0.5
-    solidity-coverage: ^0.7.14
-    ts-node: ^10.8.0
-    typechain: 8.0.0
-    typescript: ^4.7.2
-  languageName: unknown
-  linkType: soft
+  checksum: ee13cfc499f1ed636b3d05151bff5316737f87189551f517fb9781838c68dd48eb89c1f353994f2728d0e8e8d8303f2a7c83ffca03ef931f1e859065596c747f
+  languageName: node
+  linkType: hard
 
 "@hyperlane-xyz/infra@workspace:typescript/infra":
   version: 0.0.0-use.local