> ## Documentation Index
> Fetch the complete documentation index at: https://injectivelabs-docs-ai-sdk.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# IBC

查询链上 IBC 相关数据的示例代码片段。

## 使用 gRPC

### 从 IBC 哈希获取 denom trace

```ts theme={null}
import { ChainGrpcIbcApi } from "@injectivelabs/sdk-ts/client/chain";
import { getNetworkEndpoints, Network } from "@injectivelabs/networks";

const endpoints = getNetworkEndpoints(Network.Testnet);
const chainGrpcIbcApi = new ChainGrpcIbcApi(endpoints.grpc);
const hash = "...";

const denomTrace = await chainGrpcIbcApi.fetchDenomTrace(hash);

console.log(denomTrace);
```

### 获取 denom trace 列表

```ts theme={null}
import { ChainGrpcIbcApi } from "@injectivelabs/sdk-ts/client/chain";
import { getNetworkEndpoints, Network } from "@injectivelabs/networks";

const endpoints = getNetworkEndpoints(Network.Testnet);
const chainGrpcIbcApi = new ChainGrpcIbcApi(endpoints.grpc);

const denomTraces = await chainGrpcIbcApi.fetchDenomsTrace();

console.log(denomTraces);
```