eth_getBlockByHash

Retrieves comprehensive information about a block on Arbitrum L2 by its hash identifier, including header data, transaction lists, and execution metrics.

Parameters

Parameter	Type	Required	Description
blockHash	string	Yes	The 32-byte block hash (66 characters with 0x prefix)
fullTransactionObjects	boolean	Yes	When true, returns complete transaction objects. When false, returns only transaction hashes

Returns

Returns a block object with the following fields:

Field	Type	Description
number	string	Block number in hexadecimal
hash	string	32-byte block hash
parentHash	string	Hash of the parent block
mixHash	string	Unique identifier for block generation
nonce	string	Proof-of-work nonce (always 0x0000000000000000 on Arbitrum L2)
sha3Uncles	string	SHA3 hash of uncles data
logsBloom	string	256-byte bloom filter for block logs
transactionsRoot	string	Root hash of the transaction trie
stateRoot	string	Root hash of the final state trie
receiptsRoot	string	Root hash of the receipts trie
miner	string	Address receiving block rewards
difficulty	string	Block difficulty (minimal on Arbitrum L2)
totalDifficulty	string	Total chain difficulty up to this block
extraData	string	Additional block-specific data
size	string	Block size in bytes (hexadecimal)
gasLimit	string	Maximum gas allowed in block
gasUsed	string	Total gas consumed by all transactions
timestamp	string	Unix timestamp of block creation
transactions	array	Array of transaction hashes or full transaction objects
uncles	array	Array of uncle block hashes (always empty on Arbitrum L2)
baseFeePerGas	string	Base fee per gas unit (EIP-1559)
l1BlockNumber	string	Corresponding L1 block number (Arbitrum-specific)
sendCount	string	Number of L2-to-L1 messages (Arbitrum-specific)
sendRoot	string	Root hash of L2-to-L1 message tree (Arbitrum-specific)

Implementation Example

cURL

curl -X POST https://api-arbitrum-mainnet-archive.n.dwellir.com/YOUR_API_KEY \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_getBlockByHash",
    "params": [
      "0x7d5a4369273c723454ac137f48a4f142b097aa2779464e6505f1b1c5e37b5382",
      false
    ],
    "id": 1
  }'

JavaScript

const response = await fetch('https://api-arbitrum-mainnet-archive.n.dwellir.com/YOUR_API_KEY', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    jsonrpc: '2.0',
    method: 'eth_getBlockByHash',
    params: [
      '0x7d5a4369273c723454ac137f48a4f142b097aa2779464e6505f1b1c5e37b5382',
      false  // Set to true for full transaction objects
    ],
    id: 1
  })
});

const data = await response.json();
console.log(data.result);

Python

import requests
import json

url = 'https://api-arbitrum-mainnet-archive.n.dwellir.com/YOUR_API_KEY'
headers = {'Content-Type': 'application/json'}

payload = {
    "jsonrpc": "2.0",
    "method": "eth_getBlockByHash",
    "params": [
        "0x7d5a4369273c723454ac137f48a4f142b097aa2779464e6505f1b1c5e37b5382",
        False  # Set to True for full transaction objects
    ],
    "id": 1
}

response = requests.post(url, headers=headers, data=json.dumps(payload))
print(response.json()['result'])

Response Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "baseFeePerGas": "0x5f5e100",
    "difficulty": "0x1",
    "extraData": "0x",
    "gasLimit": "0x7a1200",
    "gasUsed": "0x5208",
    "hash": "0x7d5a4369273c723454ac137f48a4f142b097aa2779464e6505f1b1c5e37b5382",
    "l1BlockNumber": "0x8e1a23",
    "logsBloom": "0x00000000000000000000000000000000...",
    "miner": "0x0000000000000000000000000000000000000000",
    "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "nonce": "0x0000000000000000",
    "number": "0x5bad55",
    "parentHash": "0xb4fbadf8ea452b139718e2700dc1135cfc81145031c84b7ab27cd99f43ec28ca",
    "receiptsRoot": "0x9b0816dba2e4c1c7b2d38d0c3da6e6bb93c1713a7e986e38f856b6fb725234cf",
    "sendCount": "0x2",
    "sendRoot": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
    "sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
    "size": "0x21d",
    "stateRoot": "0xddc8b0234248b014296fed29c5c0e9d6e5a6e4a0576ce66970a36c064e3cd96b",
    "timestamp": "0x5e0be0ff",
    "totalDifficulty": "0x1",
    "transactions": [
      "0x5d2dd8b32dc30f347120c5877975c93ccf3e5a5c9ad0c595b0a73c3e00c9e9bb",
      "0x8a91b1b37e0e463c27cb340dc0e2cbc5636cba8d9b3e9a66c2a9e6c3f8c65e82"
    ],
    "transactionsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
    "uncles": []
  }
}

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