defender-admin-client

Defender Admin Client

Defender Admin acts as an interface to manage your smart contract project through one or more secure multi-signature contracts. Defender Admin holds no control at all over your system, which is fully controlled by the keys of the signers.

To interact with your contracts, you create proposals that need to be reviewed and approved by the other members of the multi-signature wallets. These proposals can be created directly in the Defender web application, or using this library. You can also rely on this library to add your contracts to the Defender Admin dashboard.

Install

npm install defender-admin-client

yarn add defender-admin-client

Usage

Start by creating a new Team API Key in Defender, and granting it the capability to create new proposals. Use the newly created API key to initialize an instance of the Admin client.

const { AdminClient } = require('defender-admin-client');
const client = new AdminClient({apiKey: API_KEY, apiSecret: API_SECRET});

Action proposals

To create a custom action proposal, you need to provide the function interface (which you can extract from the contract's ABI), its inputs, and the multisig that will be used for approving it:

await client.createProposal({
  contract: { address: '0x28a8746e75304c0780E011BEd21C72cD78cd535E', network: 'rinkeby' }, // Target contract
  title: 'Adjust fee to 10%', // Title of the proposal
  description: 'Adjust the contract fee collected per action to 10%', // Description of the proposal
  type: 'custom', // Use 'custom' for custom admin actions
  functionInterface: { name: 'setFee', inputs: [{ type: 'uint256', name: 'fee' }] }, // Function ABI
  functionInputs: ['10'], // Arguments to the function
  via: '0x22d491Bde2303f2f43325b2108D26f1eAbA1e32b', // Multisig address
  viaType: 'Gnosis Safe', // Either Gnosis Safe or Gnosis Multisig
});

Issuing DELEGATECALLs

When invoking a function via a Gnosis Safe, it's possible to call it via a DELEGATECALL instruction instead of a regular call. This has the effect of executing the code in the called contract in the context of the multisig, meaning any operations that affect storage will affect the multisig, and any calls to additional contracts will be executed as if the msg.sender were the multisig. To do this, add a metadata parameter with the value { operationType: 'delegateCall' } to your createProposal call:

await client.createProposal({
  // ... Include all parameters from the example above
  via: '0x22d491Bde2303f2f43325b2108D26f1eAbA1e32b', // Multisig address
  viaType: 'Gnosis Safe', // Must be Gnosis Safe to handle delegate calls
  metadata: { operationType: 'delegateCall' }, // Issue a delegatecall instead of a regular call
});

Note that this can potentially brick your multisig, if the contract you delegatecall into accidentally modifies the multisig's storage, rendering it unusable. Make sure you understand the risks before issuing a delegatecall.

Upgrade proposals

To create an upgrade action proposal, just provide the proxy contract network and address, along with the new implementation address, and Defender will automatically resolve the rest:

const newImplementation = '0x3E5e9111Ae8eB78Fe1CC3bb8915d5D461F3Ef9A9';
const contract = { network: 'rinkeby', address: '0x28a8746e75304c0780E011BEd21C72cD78cd535E' }
await client.proposeUpgrade({ newImplementation }, contract);

If your proxies do not implement the EIP1967 admin slot, you will need to provide either the ProxyAdmin contract or the Account with rights to execute the upgrade, as shown below.

Explicit ProxyAdmin

const newImplementation = '0x3E5e9111Ae8eB78Fe1CC3bb8915d5D461F3Ef9A9';
const proxyAdmin = '0x2fC100f1BeA4ACCD5dA5e5ed725D763c90e8ca96';
const contract = { network: 'rinkeby', address: '0x28a8746e75304c0780E011BEd21C72cD78cd535E' }
await client.proposeUpgrade({ newImplementation, proxyAdmin }, contract);

Explicit owner account

const newImplementation = '0x3E5e9111Ae8eB78Fe1CC3bb8915d5D461F3Ef9A9';
const via = '0xF608FA64c4fF8aDdbEd106E69f3459effb4bC3D1';
const viaType = 'Gnosis Safe'; // or 'Gnosis Multisig', or 'EOA'
const contract = { network: 'rinkeby', address: '0x28a8746e75304c0780E011BEd21C72cD78cd535E' }
await client.proposeUpgrade({ newImplementation, via, viaType }, contract);

Pause proposals

To create pause and unpause action proposals, you need to provide the contract network and address, as well as the multisig that will be used for approving it. Defender takes care of the rest:

const contract = { network: 'rinkeby', address: '0x28a8746e75304c0780E011BEd21C72cD78cd535E' }

// Create a pause proposal
await client.proposePause({ via: '0x22d491Bde2303f2f43325b2108D26f1eAbA1e32b', viaType: 'Gnosis Safe' }, contract);

// Create an unpause proposal
await client.proposeUnpause({ via: '0x22d491Bde2303f2f43325b2108D26f1eAbA1e32b', viaType: 'Gnosis Safe' }, contract);

Note that for pause and unpause proposals to work, your contract ABI must include corresponding pause() and unpause() functions.

Adding Contracts

If you create a new proposal for a Contract that has not yet been added to Defender Admin, it will be automatically added with an autogenerated name and an empty ABI. You can optionally control these values by providing values for them in the contract object of the proposal:

const contract = { 
  network: 'rinkeby', 
  address: '0x28a8746e75304c0780E011BEd21C72cD78cd535E',
  name: 'My contract', // Name of the contract if it is created along with this proposal
  abi: '[...]', // ABI to set for this contract if it is created
};
await client.proposeUpgrade({ newImplementation }, contract);

Alternatively, you can add any contract explicitly by using the addContract method, and setting network, address, name, and ABI. The same method can be used to update the contract's name or ABI.

await client.addContract({ 
  network: 'rinkeby', 
  address: '0x28a8746e75304c0780E011BEd21C72cD78cd535E',
  name: 'My contract',
  abi: '[...]',
});

You can also list all contracts in your Defender Admin dashboard via listContracts.