Initialize SDK

When you are using Go SDK, you need to initialize a SDK instance, and modify the default config according the needs.

You need to provide some configuration information:

parameter	description	method
RPC address	CESS chain rpc address	cess.ConnectRpcAddrs
Mnemonic	CESS wallet mnemonic phrase, if ignored, no transaction can be made.	cess.Mnemonic
TransactionTimeout	Transaction timeout	cess.TransactionTimeout
Name	SDK name	cess.Name

Minimum configuration sdk client

package main

import (
	"context"
	"fmt"

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

var RPC_ADDRS = []string{
	//test net
	"wss://testnet-rpc0.cess.cloud/ws/",
	"wss://testnet-rpc1.cess.cloud/ws/",
	"wss://testnet-rpc2.cess.cloud/ws/",
}

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

Fully configured sdk client

package main

import (
	"context"
	"fmt"
	"time"

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

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

var RPC_ADDRS = []string{
	"wss://testnet-rpc0.cess.cloud/ws/",
	"wss://testnet-rpc1.cess.cloud/ws/",
	"wss://testnet-rpc2.cess.cloud/ws/",
}

func main() {
	sdk, err := cess.New(
		context.Background(),
		cess.ConnectRpcAddrs(RPC_ADDRS),
		cess.Mnemonic(MY_MNEMONIC),
		cess.TransactionTimeout(time.Second*10),
		cess.Name("my-sdk"),
	)
	if err != nil {
		panic(err)
	}
	fmt.Println(sdk.SysVersion())
}