Get L2 to L1 message proof

POST

https://zksync.nownodes.io/

Authorizations

ApiKeyAuthApiKeyAuth

api-key string

NOWNodes API key passed in the api-key header.

Sends a JSON-RPC request to fetch the Merkle proof for a message sent via L1Messenger. If the specified message is not found, the result will be null.

Body

application/json

jsonrpcstringrequired

methodstringrequired

paramsArray<integer | string | integer>required

Show child attributes

One of

integer

string

integer

idintegerrequired

Response

200OK

L2 to L1 message proof

Get L2 to L1 message proof

curl -X POST 'https://zksync.nownodes.io/' \
  -H 'Content-Type: application/json' \
  -d '{
    "jsonrpc": "2.0",
    "method": "zks_getL2ToL1MsgProof",
    "params": [
      5187,
      "0x87869cb87c4Fa78ca278dF358E890FF73B42a39E",
      "0x22de7debaa98758afdaee89f447ff43bab5da3de6acca7528b281cc2f1be2ee9"
    ],
    "id": 1
  }'

import { JsonRpcProvider } from "ethers";

const provider = new JsonRpcProvider("https://zksync.nownodes.io/");
const result = await provider.send("zks_getL2ToL1MsgProof", [
  5187,
  "0x87869cb87c4Fa78ca278dF358E890FF73B42a39E",
  "0x22de7debaa98758afdaee89f447ff43bab5da3de6acca7528b281cc2f1be2ee9"
]);
console.log(result);

require 'eth'
require 'json'
require 'net/http'

uri = URI('https://zksync.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
  "jsonrpc": "2.0",
  "method": "zks_getL2ToL1MsgProof",
  "params": [
    5187,
    "0x87869cb87c4Fa78ca278dF358E890FF73B42a39E",
    "0x22de7debaa98758afdaee89f447ff43bab5da3de6acca7528b281cc2f1be2ee9"
  ],
  "id": 1
}'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)

from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://zksync.nownodes.io/"))
response = w3.provider.make_request("zks_getL2ToL1MsgProof", [
  5187,
  "0x87869cb87c4Fa78ca278dF358E890FF73B42a39E",
  "0x22de7debaa98758afdaee89f447ff43bab5da3de6acca7528b281cc2f1be2ee9"
])
print(response)

import { createPublicClient, http } from "viem";

const client = createPublicClient({
  transport: http("https://zksync.nownodes.io/"),
});

const result = await client.request({
  method: "zks_getL2ToL1MsgProof",
  params: [
  5187,
  "0x87869cb87c4Fa78ca278dF358E890FF73B42a39E",
  "0x22de7debaa98758afdaee89f447ff43bab5da3de6acca7528b281cc2f1be2ee9"
],
});

console.log(result);

const endpoint = "https://zksync.nownodes.io/";
const apiKey = "YOUR_API_KEY";

async function nownodesRequest(payload) {
  const response = await fetch(endpoint, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      "api-key": apiKey,
    },
    body: JSON.stringify(payload),
  });

  return response.json();
}

const result = await nownodesRequest({ jsonrpc: "2.0", method: "zks_getL2ToL1MsgProof", params: [
  5187,
  "0x87869cb87c4Fa78ca278dF358E890FF73B42a39E",
  "0x22de7debaa98758afdaee89f447ff43bab5da3de6acca7528b281cc2f1be2ee9"
], id: 1 });
console.log(result);

const response = await fetch('https://zksync.nownodes.io/', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
      "jsonrpc": "2.0",
      "method": "zks_getL2ToL1MsgProof",
      "params": [
        5187,
        "0x87869cb87c4Fa78ca278dF358E890FF73B42a39E",
        "0x22de7debaa98758afdaee89f447ff43bab5da3de6acca7528b281cc2f1be2ee9"
      ],
      "id": 1
    }),
});

const data = await response.json();

import requests

payload = {
  "jsonrpc": "2.0",
  "method": "zks_getL2ToL1MsgProof",
  "params": [
    5187,
    "0x87869cb87c4Fa78ca278dF358E890FF73B42a39E",
    "0x22de7debaa98758afdaee89f447ff43bab5da3de6acca7528b281cc2f1be2ee9"
  ],
  "id": 1
}

response = requests.post('https://zksync.nownodes.io/', json=payload)
data = response.json()

require 'net/http'
require 'json'

uri = URI('https://zksync.nownodes.io/')
request = Net::HTTP::Post.new(uri)
request['Content-Type'] = 'application/json'
request.body = '{
    "jsonrpc": "2.0",
    "method": "zks_getL2ToL1MsgProof",
    "params": [
      5187,
      "0x87869cb87c4Fa78ca278dF358E890FF73B42a39E",
      "0x22de7debaa98758afdaee89f447ff43bab5da3de6acca7528b281cc2f1be2ee9"
    ],
    "id": 1
  }'

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |http| http.request(request) }
data = JSON.parse(response.body)

Request Body

{
  "jsonrpc": "2.0",
  "method": "zks_getL2ToL1MsgProof",
  "params": [
    5187,
    "0x87869cb87c4Fa78ca278dF358E890FF73B42a39E",
    "0x22de7debaa98758afdaee89f447ff43bab5da3de6acca7528b281cc2f1be2ee9"
  ],
  "id": 1
}

200

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "id": 0,
    "proof": [
      "0x8c48910df2ca7de509daf50b3182fcdf2dd6c422c6704054fd857d6c9516d6fc"
    ],
    "root": "0x920c63cb0066a08da45f0a9bf934517141bd72d8e5a51421a94b517bf49a0d39"
  }
}

Documentation

How to migrate to NOWNodes

Get L2 to L1 message proof

Authorizations

Body

Response