eth_getHeaderByNumber | Plasma

Plasma API method that returns the block header by block number. quantity or tag — the block number in hex format or block tag (latest, earliest, pending.

POST /be84184cd12967be5a65d06651c60085

eth_getHeaderByNumber

cURL

curl --request POST \
  --url https://plasma-mainnet.core.chainstack.com/be84184cd12967be5a65d06651c60085 \
  --header 'Content-Type: application/json' \
  --data '
{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "eth_getHeaderByNumber",
  "params": [
    "latest"
  ]
}
'

import requests

url = "https://plasma-mainnet.core.chainstack.com/be84184cd12967be5a65d06651c60085"

payload = {
    "id": 1,
    "jsonrpc": "2.0",
    "method": "eth_getHeaderByNumber",
    "params": ["latest"]
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({id: 1, jsonrpc: '2.0', method: 'eth_getHeaderByNumber', params: ['latest']})
};

fetch('https://plasma-mainnet.core.chainstack.com/be84184cd12967be5a65d06651c60085', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://plasma-mainnet.core.chainstack.com/be84184cd12967be5a65d06651c60085",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'id' => 1,
    'jsonrpc' => '2.0',
    'method' => 'eth_getHeaderByNumber',
    'params' => [
        'latest'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://plasma-mainnet.core.chainstack.com/be84184cd12967be5a65d06651c60085"

	payload := strings.NewReader("{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"eth_getHeaderByNumber\",\n  \"params\": [\n    \"latest\"\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://plasma-mainnet.core.chainstack.com/be84184cd12967be5a65d06651c60085")
  .header("Content-Type", "application/json")
  .body("{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"eth_getHeaderByNumber\",\n  \"params\": [\n    \"latest\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://plasma-mainnet.core.chainstack.com/be84184cd12967be5a65d06651c60085")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"id\": 1,\n  \"jsonrpc\": \"2.0\",\n  \"method\": \"eth_getHeaderByNumber\",\n  \"params\": [\n    \"latest\"\n  ]\n}"

response = http.request(request)
puts response.read_body

200

{
  "jsonrpc": "<string>",
  "id": 123,
  "result": {}
}

Plasma API method that returns the block header by block number.

Parameters

• quantity or tag — the block number in hex format or block tag (latest, earliest, pending, safe, finalized)

Response

• object — the block header object

eth_getHeaderByNumber code examples

ethers.js

const { JsonRpcProvider } = require("ethers");

const provider = new JsonRpcProvider("CHAINSTACK_NODE_URL");

async function call() {
  const result = await provider.send("eth_getHeaderByNumber", [
    "latest"
  ]);
  console.log(result);
}

call();

from web3 import Web3

node_url = "CHAINSTACK_NODE_URL"
web3 = Web3(Web3.HTTPProvider(node_url))

# Make the call
# Add your parameters here
# result = web3.eth.<method_name>(...)
print(result)

curl -X POST "CHAINSTACK_NODE_URL" \
  -H "Content-Type: application/json" \
  --data '{
    "jsonrpc": "2.0",
    "method": "eth_getHeaderByNumber",
    "params": [],
    "id": 1
  }'

Body

application/json

id · integer · default: 1

jsonrpc · string · default: 2.0

method · string · default: eth_getHeaderByNumber

params · string[]

Block number or tag (latest, earliest, pending).

Response

200 - application/json

Returns the block header by block number.

jsonrpc · string

id · integer

result · object | null