# Setup Credo Agent

This guide walks you through the setup process for a **Credo Agent** with support for **cheqd DIDs** and **AnonCreds**.

## Prerequisites

Before you begin, make sure you have the following:

* **Node.js** v16 or v18
* **Yarn** or **npm** installed
* A working **Node.js** or **React Native** project
* Follow the Getting Started guide if you're new to Credo

## Installing Cheqd

To enable cheqd in your agent, install the required package:

```bash
yarn add @credo-ts/cheqd
# or
npm install @credo-ts/cheqd
```

This package provides everything needed to register, resolve, and interact with `did:cheqd` identifiers and AnonCreds objects.

### React Native Support

If you're using **React Native**, additional steps are needed to support `cosmjs`:

#### 1. Use `cosmjs-rn` packages

Update your `package.json` using **npm overrides** or **Yarn resolutions**:

**Example (NPM `overrides`):**

```json
{
  "overrides": {
    "@cosmjs/amino": "npm:@cosmjs-rn/amino@^0.27.1",
    "@cosmjs/encoding": "npm:@cosmjs-rn/encoding@^0.27.1",
    "@cosmjs/math": "npm:@cosmjs-rn/math@^0.27.1",
    "@cosmjs/stargate": "npm:@cosmjs-rn/stargate@^0.27.1",
    "@cosmjs/tendermint-rpc": "npm:@cosmjs-rn/tendermint-rpc@^0.27.1",
    "@cosmjs/utils": "npm:@cosmjs-rn/utils@^0.27.1",
    "@cosmjs/proto-signing": "npm:@cosmjs-rn/proto-signing@^0.27.1",
    "@cosmjs/crypto": "npm:@cosmjs-rn/crypto@^0.27.1"
  }
}
```

**Example (Yarn `resolutions`):**

```json
{
  "resolutions": {
    "@cosmjs/amino": "npm:@cosmjs-rn/amino@^0.27.1",
    "@cosmjs/encoding": "npm:@cosmjs-rn/encoding@^0.27.1",
    "@cosmjs/math": "npm:@cosmjs-rn/math@^0.27.1",
    "@cosmjs/stargate": "npm:@cosmjs-rn/stargate@^0.27.1",
    "@cosmjs/tendermint-rpc": "npm:@cosmjs-rn/tendermint-rpc@^0.27.1",
    "@cosmjs/utils": "npm:@cosmjs-rn/utils@^0.27.1",
    "@cosmjs/proto-signing": "npm:@cosmjs-rn/proto-signing@^0.27.1",
    "@cosmjs/crypto": "npm:@cosmjs-rn/crypto@^0.27.1"
  }
}
```

#### 2. Add Buffer Polyfill

Install the `buffer` package:

```bash
bashCopyEdityarn add buffer
```

Create a `shim.js` file:

```ts
tsCopyEditimport { Buffer } from 'buffer'
global.Buffer = Buffer
```

Then, import this shim in your entry point (e.g. before your `App.tsx` is rendered):

```ts
tsCopyEditimport './shim'
```

### Adding cheqd to the Agent[​](https://credo.js.org/guides/getting-started/set-up/cheqd#adding-the-cheqd-to-the-agent) <a href="#adding-the-cheqd-to-the-agent" id="adding-the-cheqd-to-the-agent"></a>

After installing the dependencies, we can register the cheqd module on the agent by adding the below code snippet to the agent constructor.

```typescript
import { Agent, DidsModule, KeyType, DidDocument } from '@credo-ts/core'
import { agentDependencies } from '@credo-ts/node'
import { AskarModule } from '@credo-ts/askar'
import { askar } from '@openwallet-foundation/askar-nodejs'
import {
  ConnectionsModule,
  V2ProofProtocol,
  V2CredentialProtocol,
  ProofsModule,
  AutoAcceptProof,
  AutoAcceptCredential,
  CredentialsModule,
  HttpOutboundTransport,
  getDefaultDidcommModules,
} from '@credo-ts/didcomm'
import {
  CheqdAnonCredsRegistry,
  CheqdDidRegistrar,
  CheqdDidResolver,
  CheqdModule,
  CheqdModuleConfig,
} from '@credo-ts/cheqd'
import { AnonCredsModule } from '@credo-ts/anoncreds'
import { anoncreds } from '@hyperledger/anoncreds-nodejs'

const agent = new Agent({
  config,
  dependencies: agentDependencies,
  modules: {
    dids: new DidsModule({
      registrars: [new CheqdDidRegistrar()],
      resolvers: [new CheqdDidResolver()],
    }),

    // AnonCreds
    anoncreds: new AnonCredsModule({
      registries: [new CheqdAnonCredsRegistry()],
      anoncreds,
    }),

    // Add cheqd module
    cheqd: new CheqdModule(
      new CheqdModuleConfig({
        networks: [
          {
            network: '<mainnet or testnet>',
            cosmosPayerSeed: '<cosmos payer seed or mnemonic>',
          },
        ],
      })
    ),
    // Indy VDR can optionally be used with Askar as wallet and storage implementation
    askar: new AskarModule({
      askar,
    }),
    connections: new ConnectionsModule({
      autoAcceptConnections: true,
    }),
    credentials: new CredentialsModule({
      autoAcceptCredentials: AutoAcceptCredential.ContentApproved,
      credentialProtocols: [
        new V2CredentialProtocol({
          credentialFormats: [new LegacyIndyCredentialFormatService(), new AnonCredsCredentialFormatService()],
        }),
      ],
    }),
  },
})
```

The `cosmosPayerSeed` can be a 32-bit seed value or mnemonic. It can be managed using Leap wallet, which is available as a mobile app or browser extension for Chrome and Safari. Leap enables users to create accounts, exchange tokens, etc. To setup Leap wallet for cheqd follow the tutorial below:

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-cover data-type="files"></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><mark style="color:blue;"><strong>Leap Wallet</strong></mark></td><td>Manage your CHEQ natively through the Leap Wallet with full support on desktop, browser and mobile.</td><td><a href="https://3569764573-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FPVAMvpKH7PYzvXA6u6Cn%2Fuploads%2Fgit-blob-016f569c3c495a2c4339458cd1d15d76ad6f0c7b%2Fleap%20wallet.png?alt=media">leap wallet.png</a></td><td><a href="../../network/wallets/setup-leap-wallet">setup-leap-wallet</a></td></tr></tbody></table>

## Next steps

Now that your Credo agent is successfully set up to work with cheqd, try following our tutorials for creating a new DID or issuing Verifiable Credentials.

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><mark style="color:blue;"><strong>Create a DID</strong></mark></td><td>Create an Issuer DID with the <code>did:cheqd</code>  DID method using Credo.</td><td><a href="dids/create-did">create-did</a></td></tr><tr><td><mark style="color:blue;"><strong>Issue a Verifiable Credential</strong></mark></td><td>Issue a Verifiable Credential (AnonCreds) using Credo signed by a <code>did:cheqd</code> DID.</td><td><a href="credentials/anoncreds/issue-credential">issue-credential</a></td></tr></tbody></table>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.cheqd.io/product/sdk/credo/set-up-agent.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.