diff --git a/packages/walletconnect/src/provider.ts b/packages/walletconnect/src/provider.ts
index 8027aa071..4a1b4735f 100644
--- a/packages/walletconnect/src/provider.ts
+++ b/packages/walletconnect/src/provider.ts
@@ -47,6 +47,7 @@ import {
   ApiRequestArguments,
   NetworkId,
   networkIds,
+  keyTypes,
   EnableOptionsBase
 } from '@alephium/web3'
 
@@ -547,12 +548,13 @@ export function formatAccount(permittedChain: string, account: Account): string
 }
 
 export function parseAccount(account: string): Account & { networkId: NetworkId } {
-  const [_namespace, networkId, _group, publicKey, keyType] = account.replace(/\//g, ':').split(':')
-  const address = addressFromPublicKey(publicKey)
-  const group = groupOfAddress(address)
-  if (keyType !== 'default' && keyType !== 'bip340-schnorr') {
-    throw Error(`Invalid key type: ${keyType}`)
+  const [_namespace, networkId, _group, publicKey, _keyType] = account.replace(/\//g, ':').split(':')
+  const keyType = keyTypes.find((tpe) => tpe === _keyType)
+  if (keyType === undefined) {
+    throw Error(`Invalid key type: ${_keyType}`)
   }
+  const address = addressFromPublicKey(publicKey, keyType)
+  const group = groupOfAddress(address)
   return { address, group, publicKey, keyType, networkId: networkId as NetworkId }
 }
 
diff --git a/packages/web3/src/api/node-provider.ts b/packages/web3/src/api/node-provider.ts
index e6b23fe16..935c27568 100644
--- a/packages/web3/src/api/node-provider.ts
+++ b/packages/web3/src/api/node-provider.ts
@@ -28,7 +28,6 @@ import {
   requestWithLog
 } from './types'
 import { Api as NodeApi, CallContractFailed, CallContractSucceeded } from './api-alephium'
-import { tryGetCallResult } from '../contract'
 import {
   HexString,
   addressFromContractId,
@@ -38,6 +37,7 @@ import {
   isHexString,
   toNonNegativeBigInt
 } from '../utils'
+import * as node from '../api/api-alephium'
 
 function initializeNodeApi(baseUrl: string, apiKey?: string, customFetch?: typeof fetch): NodeApi<string> {
   const nodeApi = new NodeApi<string>({
@@ -253,3 +253,10 @@ export class NodeProvider implements NodeProviderApis {
     }
   }
 }
+
+export function tryGetCallResult(result: node.CallContractResult): node.CallContractSucceeded {
+  if (result.type === 'CallContractFailed') {
+    throw new Error(`Failed to call contract, error: ${(result as node.CallContractFailed).error}`)
+  }
+  return result as node.CallContractSucceeded
+}
diff --git a/packages/web3/src/api/utils.ts b/packages/web3/src/api/utils.ts
index 88cb848ff..30b7be173 100644
--- a/packages/web3/src/api/utils.ts
+++ b/packages/web3/src/api/utils.ts
@@ -17,7 +17,7 @@ along with the library. If not, see <http://www.gnu.org/licenses/>.
 */
 
 import 'cross-fetch/polyfill'
-import { node } from '..'
+import * as node from '../api/api-alephium'
 
 export function convertHttpResponse<T>(response: { status: number; data: T; error?: { detail: string } }): T {
   if (response.error) {
diff --git a/packages/web3/src/codec/contract-output-codec.ts b/packages/web3/src/codec/contract-output-codec.ts
index dcf86c970..ab75420b3 100644
--- a/packages/web3/src/codec/contract-output-codec.ts
+++ b/packages/web3/src/codec/contract-output-codec.ts
@@ -24,7 +24,7 @@ import { Codec } from './codec'
 import { Token, tokensCodec } from './token-codec'
 import { ContractOutput as ApiContractOutput } from '../api/api-alephium'
 import { blakeHash, createHint } from './hash'
-import { binToHex, bs58 } from '..'
+import { binToHex, bs58 } from '../utils'
 import { signedIntCodec } from './signed-int-codec'
 import { lockupScriptCodec } from './lockup-script-codec'
 
diff --git a/packages/web3/src/codec/lockup-script-codec.ts b/packages/web3/src/codec/lockup-script-codec.ts
index c98cfddfd..b705481c2 100644
--- a/packages/web3/src/codec/lockup-script-codec.ts
+++ b/packages/web3/src/codec/lockup-script-codec.ts
@@ -38,7 +38,7 @@ class PublicKeyHashCodec implements Codec<PublicKeyHash> {
 }
 
 const publicKeyHashCodec = new PublicKeyHashCodec()
-const publicKeyHashesCodec = new ArrayCodec(publicKeyHashCodec)
+export const publicKeyHashesCodec = new ArrayCodec(publicKeyHashCodec)
 const multiSigParser = Parser.start()
   .nest('publicKeyHashes', { type: publicKeyHashesCodec.parser })
   .nest('m', { type: compactUnsignedIntCodec.parser })
diff --git a/packages/web3/src/codec/transaction-codec.ts b/packages/web3/src/codec/transaction-codec.ts
index d48790a0f..4acc2d36e 100644
--- a/packages/web3/src/codec/transaction-codec.ts
+++ b/packages/web3/src/codec/transaction-codec.ts
@@ -27,7 +27,7 @@ import { Either } from './either-codec'
 import { AssetOutput, AssetOutputCodec } from './asset-output-codec'
 import { ContractOutput, ContractOutputCodec } from './contract-output-codec'
 import { FixedAssetOutput, Transaction as ApiTransaction } from '../api/api-alephium'
-import { hexToBinUnsafe } from '..'
+import { hexToBinUnsafe } from '../utils'
 import { ContractOutput as ApiContractOutput } from '../api/api-alephium'
 import { Codec } from './codec'
 import { Output, outputCodec, outputsCodec } from './output-codec'
diff --git a/packages/web3/src/contract/contract.ts b/packages/web3/src/contract/contract.ts
index 0cb6b37b5..ff9bf9e33 100644
--- a/packages/web3/src/contract/contract.ts
+++ b/packages/web3/src/contract/contract.ts
@@ -34,7 +34,8 @@ import {
   getDefaultPrimitiveValue,
   PrimitiveTypes,
   decodeArrayType,
-  fromApiPrimitiveVal
+  fromApiPrimitiveVal,
+  tryGetCallResult
 } from '../api'
 import { CompileProjectResult } from '../api/api-alephium'
 import {
@@ -2369,10 +2370,3 @@ export const getContractIdFromUnsignedTx = async (
 
 // This function only works in the simple case where a single non-subcontract is created in the tx
 export const getTokenIdFromUnsignedTx = getContractIdFromUnsignedTx
-
-export function tryGetCallResult(result: node.CallContractResult): node.CallContractSucceeded {
-  if (result.type === 'CallContractFailed') {
-    throw new Error(`Failed to call contract, error: ${(result as node.CallContractFailed).error}`)
-  }
-  return result as node.CallContractSucceeded
-}
diff --git a/packages/web3/src/contract/events.ts b/packages/web3/src/contract/events.ts
index 976006dd5..5513eca61 100644
--- a/packages/web3/src/contract/events.ts
+++ b/packages/web3/src/contract/events.ts
@@ -16,7 +16,7 @@ You should have received a copy of the GNU Lesser General Public License
 along with the library. If not, see <http://www.gnu.org/licenses/>.
 */
 
-import { web3 } from '..'
+import * as web3 from '../global'
 import { node } from '../api'
 import { Subscription, SubscribeOptions } from '../utils'
 
diff --git a/packages/web3/src/contract/ralph.test.ts b/packages/web3/src/contract/ralph.test.ts
index 3d535a787..1ac32f46e 100644
--- a/packages/web3/src/contract/ralph.test.ts
+++ b/packages/web3/src/contract/ralph.test.ts
@@ -19,7 +19,7 @@ along with the library. If not, see <http://www.gnu.org/licenses/>.
 import * as ralph from './ralph'
 import * as utils from '../utils'
 import { Fields, FieldsSig, Struct, fromApiArray, fromApiEventFields, fromApiFields, getDefaultValue } from './contract'
-import { node } from '..'
+import * as node from '../api/api-alephium'
 
 describe('contract', function () {
   it('should encode I256', () => {
diff --git a/packages/web3/src/signer/tx-builder.ts b/packages/web3/src/signer/tx-builder.ts
index df108870b..e04fdde85 100644
--- a/packages/web3/src/signer/tx-builder.ts
+++ b/packages/web3/src/signer/tx-builder.ts
@@ -16,7 +16,7 @@ You should have received a copy of the GNU Lesser General Public License
 along with the library. If not, see <http://www.gnu.org/licenses/>.
 */
 
-import { utils } from '..'
+import { binToHex, contractIdFromAddress } from '../utils'
 import { fromApiNumber256, node, NodeProvider, toApiNumber256Optional, toApiTokens } from '../api'
 import { addressFromPublicKey } from '../utils'
 import { toApiDestinations } from './signer'
@@ -90,7 +90,7 @@ export abstract class TransactionBuilder {
       ...rest
     }
     const response = await this.nodeProvider.contracts.postContractsUnsignedTxDeployContract(data)
-    const contractId = utils.binToHex(utils.contractIdFromAddress(response.contractAddress))
+    const contractId = binToHex(contractIdFromAddress(response.contractAddress))
     return { ...response, groupIndex: response.fromGroup, contractId, gasPrice: fromApiNumber256(response.gasPrice) }
   }
 
diff --git a/packages/web3/src/signer/types.ts b/packages/web3/src/signer/types.ts
index 86fc65579..425e0058b 100644
--- a/packages/web3/src/signer/types.ts
+++ b/packages/web3/src/signer/types.ts
@@ -31,9 +31,10 @@ export interface Destination {
   lockTime?: number
   message?: string
 }
-assertType<Eq<keyof Destination, keyof node.Destination>>
+assertType<Eq<keyof Destination, keyof node.Destination>>()
 
-export type KeyType = 'default' | 'bip340-schnorr'
+export const keyTypes = ['default', 'bip340-schnorr', 'multisig'] as const
+export type KeyType = (typeof keyTypes)[number]
 
 export interface Account {
   keyType: KeyType
diff --git a/packages/web3/src/transaction/status.ts b/packages/web3/src/transaction/status.ts
index b0e38ee72..24a54217e 100644
--- a/packages/web3/src/transaction/status.ts
+++ b/packages/web3/src/transaction/status.ts
@@ -16,7 +16,7 @@ You should have received a copy of the GNU Lesser General Public License
 along with the library. If not, see <http://www.gnu.org/licenses/>.
 */
 
-import { web3 } from '..'
+import * as web3 from '../global'
 import { node } from '../api'
 import { Subscription, SubscribeOptions } from '../utils'
 
diff --git a/packages/web3/src/utils/address.test.ts b/packages/web3/src/utils/address.test.ts
index 39bcbd9e5..e195cfe65 100644
--- a/packages/web3/src/utils/address.test.ts
+++ b/packages/web3/src/utils/address.test.ts
@@ -27,7 +27,8 @@ import {
   tokenIdFromAddress,
   validateAddress,
   isAssetAddress,
-  isContractAddress
+  isContractAddress,
+  encodeMultisigPublicKeys
 } from './address'
 import { binToHex } from './utils'
 
@@ -118,6 +119,54 @@ describe('address', function () {
     )
   })
 
+  it('should encode multisig public keys', () => {
+    expect(() => encodeMultisigPublicKeys([], 2)).toThrow('Public key array is empty')
+    expect(() =>
+      encodeMultisigPublicKeys(['030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc'], 2)
+    ).toThrow('Invalid m in m-of-n multisig, m: 2, n: 1')
+    expect(() =>
+      encodeMultisigPublicKeys(['030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc', '0011'], 1)
+    ).toThrow('Invalid public key: 0011')
+    expect(encodeMultisigPublicKeys(['030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc'], 1)).toEqual(
+      '0101030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc'
+    )
+    expect(
+      encodeMultisigPublicKeys(
+        [
+          '030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc',
+          '03c83325bd2c0fe1464161c6d5f42699fc9dd799dda7f984f9fbf59b01b095be19'
+        ],
+        1
+      )
+    ).toEqual(
+      '0102030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc03c83325bd2c0fe1464161c6d5f42699fc9dd799dda7f984f9fbf59b01b095be19'
+    )
+    expect(
+      encodeMultisigPublicKeys(
+        [
+          '030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc',
+          '03c83325bd2c0fe1464161c6d5f42699fc9dd799dda7f984f9fbf59b01b095be19',
+          '03c0a849d8ab8633b45b45ea7f3bb3229e1083a13fd73e027aac2bc55e7f622172'
+        ],
+        2
+      )
+    ).toEqual(
+      '0203030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc03c83325bd2c0fe1464161c6d5f42699fc9dd799dda7f984f9fbf59b01b095be1903c0a849d8ab8633b45b45ea7f3bb3229e1083a13fd73e027aac2bc55e7f622172'
+    )
+    expect(
+      encodeMultisigPublicKeys(
+        [
+          '030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc',
+          '03c83325bd2c0fe1464161c6d5f42699fc9dd799dda7f984f9fbf59b01b095be19',
+          '03c0a849d8ab8633b45b45ea7f3bb3229e1083a13fd73e027aac2bc55e7f622172'
+        ],
+        3
+      )
+    ).toEqual(
+      '0303030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc03c83325bd2c0fe1464161c6d5f42699fc9dd799dda7f984f9fbf59b01b095be1903c0a849d8ab8633b45b45ea7f3bb3229e1083a13fd73e027aac2bc55e7f622172'
+    )
+  })
+
   it('should compute address from public key', () => {
     expect(publicKeyFromPrivateKey('91411e484289ec7e8b3058697f53f9b26fa7305158b4ef1a81adfbabcf090e45')).toBe(
       '030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc'
@@ -125,6 +174,33 @@ describe('address', function () {
     expect(addressFromPublicKey('030f9f042a9410969f1886f85fa20f6e43176ae23fc5e64db15b3767c84c5db2dc')).toBe(
       '1ACCkgFfmTif46T3qK12znuWjb5Bk9jXpqaeWt2DXx8oc'
     )
+    const publicKeys = [
+      '043ed1a15fa4b9c92d5f0b712c238cc26e16bfe8a359d6dc0aeffed983c02e800b',
+      'bcdfb4cbd7555f8df4b66414f17e81eaa108dea382dabb01a63ced575d1824b37e',
+      '94438313828b1b17e5d7f2c9d773d44a81af6c3ef67446fbf350497ff3b06c3741'
+    ]
+    expect(() => addressFromPublicKey('0100', 'multisig')).toThrow('Invalid n in m-of-n multisig, m: 1, n: 0')
+    expect(() => addressFromPublicKey('013f', 'multisig')).toThrow('Invalid n in m-of-n multisig, m: 1, n: -1')
+    expect(() => addressFromPublicKey('0201', 'multisig')).toThrow('Invalid m in m-of-n multisig, m: 2, n: 1')
+    expect(() => addressFromPublicKey('3f02', 'multisig')).toThrow('Invalid m in m-of-n multisig, m: -1, n: 2')
+    expect(() => addressFromPublicKey('04' + encodeMultisigPublicKeys(publicKeys, 3).slice(2), 'multisig')).toThrow(
+      'Invalid m in m-of-n multisig, m: 4, n: 3'
+    )
+    expect(() => addressFromPublicKey('00' + encodeMultisigPublicKeys(publicKeys, 3).slice(2), 'multisig')).toThrow(
+      'Invalid m in m-of-n multisig, m: 0, n: 3'
+    )
+    expect(() => addressFromPublicKey(encodeMultisigPublicKeys(publicKeys, 3).slice(0, -2), 'multisig')).toThrow(
+      'Invalid public key size'
+    )
+    expect(addressFromPublicKey(encodeMultisigPublicKeys(publicKeys, 3), 'multisig')).toEqual(
+      'X15q3KSAid29imun4VPNCTHCNvdcB9Ji6LBp84t4TgUSLv5GvGAzAMT5PdhfWYAD1E8NcxHz5g5Ni9CE5ExRyXf8dXgg3WyEeCu9uWgohcvbtGa5QJ5Q5R33vnNPnxcvzeSEMG'
+    )
+    expect(addressFromPublicKey(encodeMultisigPublicKeys(publicKeys, 2), 'multisig')).toEqual(
+      'X15q3KSAid29imun4VPNCTHCNvdcB9Ji6LBp84t4TgUSLv5GvGAzAMT5PdhfWYAD1E8NcxHz5g5Ni9CE5ExRyXf8dXgg3WyEeCu9uWgohcvbtGa5QJ5Q5R33vnNPnxcvzeSEMF'
+    )
+    expect(addressFromPublicKey(encodeMultisigPublicKeys(publicKeys, 1), 'multisig')).toEqual(
+      'X15q3KSAid29imun4VPNCTHCNvdcB9Ji6LBp84t4TgUSLv5GvGAzAMT5PdhfWYAD1E8NcxHz5g5Ni9CE5ExRyXf8dXgg3WyEeCu9uWgohcvbtGa5QJ5Q5R33vnNPnxcvzeSEME'
+    )
   })
 
   it('should convert between contract id and address', () => {
diff --git a/packages/web3/src/utils/address.ts b/packages/web3/src/utils/address.ts
index fa8d780fa..5e86eeb3c 100644
--- a/packages/web3/src/utils/address.ts
+++ b/packages/web3/src/utils/address.ts
@@ -22,10 +22,14 @@ import { TOTAL_NUMBER_OF_GROUPS } from '../constants'
 import blake from 'blakejs'
 import bs58 from './bs58'
 import djb2 from './djb2'
-import { binToHex, hexToBinUnsafe } from './utils'
+import { binToHex, hexToBinUnsafe, isHexString } from './utils'
 import { KeyType } from '../signer'
+import { compactSignedIntCodec } from '../codec'
+import * as codec from '../codec'
+import { Buffer } from 'buffer/'
 
 const ec = new EC('secp256k1')
+const PublicKeyBytesLength = 33
 
 export enum AddressType {
   P2PKH = 0x00,
@@ -154,10 +158,65 @@ export function addressFromPublicKey(publicKey: string, _keyType?: KeyType): str
     const hash = Buffer.from(blake.blake2b(Buffer.from(publicKey, 'hex'), undefined, 32))
     const bytes = Buffer.concat([addressType, hash])
     return bs58.encode(bytes)
-  } else {
+  } else if (keyType === 'bip340-schnorr') {
     const lockupScript = Buffer.from(`0101000000000458144020${publicKey}8685`, 'hex')
     return addressFromScript(lockupScript)
+  } else {
+    return multisigAddressFromPublicKey(publicKey)
+  }
+}
+
+function multisigAddressFromPublicKey(publicKey: string): string {
+  if (!isHexString(publicKey)) {
+    throw new Error(`Invalid public key ${publicKey}, expected a hex-string`)
+  }
+  const bytes = Buffer.from(hexToBinUnsafe(publicKey))
+  const decodedM = compactSignedIntCodec.decode(bytes)
+  let index = decodedM.rest.length + 1
+  const decodedN = compactSignedIntCodec.decode(bytes.slice(index))
+  index += decodedN.rest.length + 1
+  const m = compactSignedIntCodec.toI32(decodedM)
+  const n = compactSignedIntCodec.toI32(decodedN)
+  if (n <= 0) {
+    throw new Error(`Invalid n in m-of-n multisig, m: ${m}, n: ${n}`)
+  }
+  if (m <= 0 || m > n) {
+    throw new Error(`Invalid m in m-of-n multisig, m: ${m}, n: ${n}`)
+  }
+  if (bytes.length !== PublicKeyBytesLength * n + 2) {
+    throw new Error('Invalid public key size')
+  }
+
+  const publicKeyHashes: codec.lockupScript.PublicKeyHash[] = []
+  for (; index < bytes.length; index += 33) {
+    const publicKey = bytes.slice(index, index + 33)
+    publicKeyHashes.push({ publicKeyHash: Buffer.from(blake.blake2b(publicKey, undefined, 32)) })
+  }
+  const lockupScript: codec.lockupScript.LockupScript = {
+    scriptType: AddressType.P2MPKH,
+    script: {
+      publicKeyHashes: codec.lockupScript.publicKeyHashesCodec.fromArray(publicKeyHashes),
+      m: compactSignedIntCodec.fromI32(m)
+    }
+  }
+  const encoded = codec.lockupScript.lockupScriptCodec.encode(lockupScript)
+  return bs58.encode(encoded)
+}
+
+export function encodeMultisigPublicKeys(publicKeys: string[], m: number): string {
+  if (publicKeys.length === 0) {
+    throw new Error('Public key array is empty')
+  }
+  if (m <= 0 || m > publicKeys.length) {
+    throw new Error(`Invalid m in m-of-n multisig, m: ${m}, n: ${publicKeys.length}`)
   }
+  publicKeys.forEach((publicKey) => {
+    if (!isHexString(publicKey) || publicKey.length !== PublicKeyBytesLength * 2) {
+      throw new Error(`Invalid public key: ${publicKey}`)
+    }
+  })
+  const prefix = Buffer.concat([compactSignedIntCodec.encodeI32(m), compactSignedIntCodec.encodeI32(publicKeys.length)])
+  return prefix.toString('hex') + publicKeys.join('')
 }
 
 export function addressFromScript(script: Uint8Array): string {
diff --git a/packages/web3/src/utils/exchange.ts b/packages/web3/src/utils/exchange.ts
index 58ccb4de3..8e45f2e77 100644
--- a/packages/web3/src/utils/exchange.ts
+++ b/packages/web3/src/utils/exchange.ts
@@ -16,7 +16,7 @@ You should have received a copy of the GNU Lesser General Public License
 along with the library. If not, see <http://www.gnu.org/licenses/>.
 */
 
-import { AddressType, addressFromPublicKey, addressFromScript, binToHex, bs58, hexToBinUnsafe } from '..'
+import { AddressType, addressFromPublicKey, addressFromScript, binToHex, bs58, hexToBinUnsafe } from '../utils'
 import { Transaction } from '../api/api-alephium'
 import { Address } from '../signer'
 
diff --git a/packages/web3/src/utils/number.ts b/packages/web3/src/utils/number.ts
index ae196c87a..6de41cf31 100644
--- a/packages/web3/src/utils/number.ts
+++ b/packages/web3/src/utils/number.ts
@@ -21,7 +21,7 @@ along with the library. If not, see <http://www.gnu.org/licenses/>.
 // 2. https://github.com/ethers-io/ethers.js/blob/724881f34d428406488a1c9f9dbebe54b6edecda/src.ts/utils/fixednumber.ts
 
 import BigNumber from 'bignumber.js'
-import { Number256 } from '..'
+import { Number256 } from '../api/types'
 
 export const isNumeric = (numToCheck: any): boolean => !isNaN(parseFloat(numToCheck)) && isFinite(numToCheck)
 
diff --git a/packages/web3/src/utils/sign.ts b/packages/web3/src/utils/sign.ts
index d1a979175..14706d6d6 100644
--- a/packages/web3/src/utils/sign.ts
+++ b/packages/web3/src/utils/sign.ts
@@ -17,7 +17,7 @@ along with the library. If not, see <http://www.gnu.org/licenses/>.
 */
 
 import { ec as EC } from 'elliptic'
-import { binToHex, encodeSignature, hexToBinUnsafe, signatureDecode } from '..'
+import { binToHex, encodeSignature, hexToBinUnsafe, signatureDecode } from '../utils'
 import { KeyType } from '../signer'
 import * as necc from '@noble/secp256k1'
 import { createHash, createHmac } from 'crypto'