> For the complete documentation index, see [llms.txt](https://docs.v2.like.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.v2.like.co/developer/iscn/javascript/iscn-js.md).

# iscn-js

{% hint style="warning" %}
The documentation is designed for Liker Land and LikeCoin v2. For information on [3ook.com](https://3ook.com/) and LikeCoin v3, please visit [docs.3ook.com](https://docs.3ook.com) and [dao.like.co](https://dao.like.co/).
{% endhint %}

## Repository Link

Github: <https://github.com/likecoin/iscn-js>

npm: <https://www.npmjs.com/package/@likecoin/iscn-js>

## Install

```bash
npm i -S @cosmjs/stargate @likecoin/iscn-js
```

## Usage

Please refer to `*.spec.ts` test cases for more example

Query

```typescript
import { ISCNQueryClient } from '@likecoin/iscn-js';
const client = new ISCNQueryClient();

// optional custom rpc
// await client.connect('https://mainnet-node.like.co/rpc/')

// Query ISCN by ID
const res = await client.queryRecordsById('iscn://likecoin-chain/dLbKMa8EVO9RF4UmoWKk2ocUq7IsxMcnQL1_Ps5Vg80/1');

// Query ISCN by owner
const res = await client.queryRecordsByOwner('cosmos1sf2sc6t37xhd3m0dcaq6h5dz22mtru2ugdwp0v');
```

Signing

```typescript
import { ISCNQueryClient, ISCNSigningClient } from '@likecoin/iscn-js';
import { DirectSecp256k1HdWallet } from '@cosmjs/proto-signing';
import { assertIsBroadcastTxSuccess, SigningStargateClient, StargateClient } from '@cosmjs/stargate';

const mnemonic = 'surround miss nominee dream gap cross assault thank captain prosper drop duty group candy wealth weather scale put';
const signer = await DirectSecp256k1HdWallet.fromMnemonic(mnemonic);
const [wallet] = await signer.getAccounts();

const client = new ISCNQueryClient();
const signingClient = new ISCNSigningClient();
await signingClient.connectWithSigner('https://mainnet-node.like.co/rpc/', wallet);

const res = await signingClient.createISCNRecord(wallet.address, {
  'contentFingerprints': [
    'hash://sha256/9564b85669d5e96ac969dd0161b8475bbced9e5999c6ec598da718a3045d6f2e'
  ],
  'stakeholders': [
    {
      'entity': {
        '@id': 'did:cosmos:5sy29r37gfxvxz21rh4r0ktpuc46pzjrmz29g45',
        'name': 'Chung Wu'
      },
      'rewardProportion': 95,
      'contributionType': 'http://schema.org/author'
    }
  ],
  'type': 'Article',
  'name': '使用矩陣計算遞歸關係式',
  'usageInfo': 'https://creativecommons.org/licenses/by/4.0',
  'keywords': ['matrix', 'recursion'],
});

const iscnID = await client.queryISCNIdsByTx(res.transactionHash);
```


---

# Agent Instructions
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```
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