# Initialization

Before using SDK, it is necessary to create an SDK object that includes some configuration items in the following table. Please fill in according to the actual situation:

| configuration       | Description                                                         | Method                   |
| ------------------- | ------------------------------------------------------------------- | ------------------------ |
| RPC address         | CESS chain rpc address                                              | sdkgo.ConnectRpcAddrs    |
| Mnemonic            | CESS wallet mnemonic phrase, if empty, no transaction can be made.  | sdkgo.Mnemonic           |
| Transaction timeout | Timed out waiting for transaction completion, default is 30 seconds | sdkgo.TransactionTimeout |
| SDK name            | It's just a name, default is `cess-sdk-go`                          | sdkgo.Name               |

### Create a query-only sdk client

```golang
package main

import (
    "context"
    "fmt"

    sdkgo "github.com/CESSProject/cess-go-sdk"
)

var RPC_ADDRS = []string{
    //testnet
    "wss://testnet-rpc.cess.network/ws/",
}

func main() {
    sdk, err := cess.New(
        context.Background(),
        sdkgo.ConnectRpcAddrs(RPC_ADDRS),
    )
    if err != nil {
        panic(err)
    }
    defer sdk.Close()
    fmt.Println(sdk.SystemVersion())
}
```

### Create a fully functional sdk client

```golang
package main

import (
    "context"
    "fmt"
    "time"

    sdkgo "github.com/CESSProject/cess-go-sdk"
)

// Substrate well-known mnemonic:
//
//   - https://github.com/substrate-developer-hub/substrate-developer-hub.github.io/issues/613
//   - cXgaee2N8E77JJv9gdsGAckv1Qsf3hqWYf7NL4q6ZuQzuAUtB
var MY_MNEMONIC = "bottom drive obey lake curtain smoke basket hold race lonely fit walk"

var RPC_ADDRS = []string{
    //testnet
    "wss://testnet-rpc.cess.network/ws/",
}

func main() {
    sdk, err := cess.New(
        context.Background(),
        sdkgo.ConnectRpcAddrs(RPC_ADDRS),
        sdkgo.Mnemonic(MY_MNEMONIC),
        sdkgo.TransactionTimeout(time.Second*10),
    )
    if err != nil {
        panic(err)
    }
    defer sdk.Close()
    fmt.Println(sdk.SystemVersion())
}
```


---

# 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://doc.cess.network/developer/cess-sdk/sdk-golang/initialization.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.