# BSC / opBNB

The 4EVERLAND RPC follows the JSON-RPC data format standard for Ethereum and supports all the methods in [Ethereum JSON RPC](https://ethereum.org/en/developers/docs/apis/json-rpc/#json-rpc-methods). This tutorial will provide an example of the request method for [`eth_getBalance`](https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_getbalance). Other methods can be referenced using this example.

## API Endpoints

The requested URL, combined with the API Key, is as follows:

Endpoint(https): `https://bsc-mainnet.4everland.org/v1/{apikey}`

Endpoint(wss): `wss://bsc-mainnet.4everland.org/ws/v1/{apikey}`

## Example

Take [`eth_getBalance`](https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_getbalance) method as an example

### **Parameters**

1. `DATA`, 20 Bytes - address to check for balance.
2. `QUANTITY|TAG` - integer block number, or the string `"latest"`, `"earliest"` or `"pending"`

```Shell
params: ["0x407d73d8a49eeb85d32cf465507dd71d507100c1", "latest"]
```

### **Request Example**

```Shell
curl --request POST \
     --url https://bsc-mainnet.4everland.org/v1/1659dfb40aa24bbb8153a677b98064d7 \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '
{
  "id": 1,
  "jsonrpc": "2.0",
  "params": [
    "0x145BD3C05D8d3117d133f577fa9af538ba353e8C",
    "latest"
  ],
  "method": "eth_getBalance"
}
'
```

### **Response Example**

```JSON
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x2eb9bcf4ec145"
}
```

## Networks

By substituting the URL in the example with the endpoints of other networks, you can request content from other networks.

### BNB Smart Chain Testnet

Endpoint(https): `https://bsc-testnet.4everland.org/v1/{apikey}`

Endpoint(wss): `wss://bsc-testnet.4everland.org/ws/v1/{apikey}`

### opBNB Chain Mainnet

Endpoint(https): `https://opbnb-mainnet.4everland.org/v1/{apikey}`

Endpoint(wss): `wss://opbnb-mainnet.4everland.org/ws/v1/{apikey}`

### opBNB Chain Testnet

Endpoint(https): `https://opbnb-testnet.4everland.org/v1/{apikey}`

Endpoint(wss): `wss://opbnb-testnet.4everland.org/ws/v1/{apikey}`

## Block range limitaion

When considering the block range, it is important to note that the response size for the `getFilterLogs` and `getLogs` methods varies accordingly. Specifically:

* Block range exceeding 50K: Unavailable for querying.
* Block range less than or equal to 100: Experiences no limitation on response size.
* Block range falling between 100 and 50K: At most, 50K records will be provided in the response.

{% hint style="info" %}
If you have any questions, please join our [Discord server](https://discord.com/invite/Cun2VpsdjF), or send us an email at <contact@4everland.org>.
{% endhint %}