feat: support multiple smart account owners

[0xRAG]

Description

This PR adds support for multiple owners in EVM smart accounts. It updates the API to allow specifying multiple owners when creating, retrieving, or using smart accounts, while maintaining backward compatibility with the existing single-owner approach.

Key changes:

• Added owners parameter to complement the existing owner parameter in account creation and retrieval methods
• Updated toEvmSmartAccount and toNetworkScopedEvmSmartAccount to support multiple owners
• Added ability to specify a custom signer for user operations, allowing any of the account owners to sign transactions
• Added validation to ensure at least one owner is provided
• Updated error messages to be more descriptive when owner validation fails

Tests

Running new example: pnpm tsx evm/smart-accounts/multiOwner.ts

Smart account address: 0x351e92DF2a15638163B0B223b16F76017D2Fb5ea
Smart account owners: [
  {
    address: '0xea833DBe6daFB8abF0828FAEFBcBEB2E23Eb7375',
    signMessage: [AsyncFunction: signMessage],
    sign: [AsyncFunction: sign],
    signTransaction: [AsyncFunction: signTransaction],
    signTypedData: [AsyncFunction: signTypedData],
    transfer: [AsyncFunction: transfer],
    listTokenBalances: [AsyncFunction: listTokenBalances],
    requestFaucet: [AsyncFunction: requestFaucet],
    sendTransaction: [AsyncFunction: sendTransaction],
    quoteFund: [AsyncFunction: quoteFund],
    fund: [AsyncFunction: fund],
    waitForFundOperationReceipt: [AsyncFunction: waitForFundOperationReceipt],
    quoteSwap: [AsyncFunction: quoteSwap],
    swap: [AsyncFunction: swap],
    useSpendPermission: [AsyncFunction: useSpendPermission],
    name: 'Owner-1',
    type: 'evm-server',
    policies: undefined,
    useNetwork: [AsyncFunction: useNetwork]
  },
  {
    address: '0xc730aaEE6Ef51C931e216297B08b260235aFfd91',
    signMessage: [AsyncFunction: signMessage],
    sign: [AsyncFunction: sign],
    signTransaction: [AsyncFunction: signTransaction],
    signTypedData: [AsyncFunction: signTypedData],
    transfer: [AsyncFunction: transfer],
    listTokenBalances: [AsyncFunction: listTokenBalances],
    requestFaucet: [AsyncFunction: requestFaucet],
    sendTransaction: [AsyncFunction: sendTransaction],
    quoteFund: [AsyncFunction: quoteFund],
    fund: [AsyncFunction: fund],
    waitForFundOperationReceipt: [AsyncFunction: waitForFundOperationReceipt],
    quoteSwap: [AsyncFunction: quoteSwap],
    swap: [AsyncFunction: swap],
    useSpendPermission: [AsyncFunction: useSpendPermission],
    name: 'Owner-2',
    type: 'evm-server',
    policies: undefined,
    useNetwork: [AsyncFunction: useNetwork]
  }
]
User operation hash with default owner: 0x3de322ecdbeb73d2f5d35ca2b6977da1641d1a8875c5d738e2c35f8c2b8dd46c
User operation result: {
  smartAccountAddress: '0x351e92DF2a15638163B0B223b16F76017D2Fb5ea',
  transactionHash: '0xea005e8305762f9767b475a77675a467ab3a56b9a5fe5288fc98910502f13936',
  status: 'complete',
  userOpHash: '0x3de322ecdbeb73d2f5d35ca2b6977da1641d1a8875c5d738e2c35f8c2b8dd46c'
}
User operation hash with second owner: 0x15bbe5675f89b5721ce295242fb3723c3bed4eb19df16eecdb2ad8ad56592053
User operation result with second owner: {
  smartAccountAddress: '0x351e92DF2a15638163B0B223b16F76017D2Fb5ea',
  transactionHash: '0x815818229f3f0c29a20e10eaa568ed407cbbc566f7989664bd72575f680e1fb7',
  status: 'complete',
  userOpHash: '0x15bbe5675f89b5721ce295242fb3723c3bed4eb19df16eecdb2ad8ad56592053'
}

Checklist

• Updated the typescript README if relevant
• Added a changelog entry
• Added e2e tests if introducing new functionality

[linear]

CDPSDK-1519 Support multiple owners on smart accounts

[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1

[0xRAG]

• feat: support multiple smart account owners #418 👈 (View in Graphite)
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.