The eth_getBlockByHash method returns comprehensive information about a specific block identified by its unique 32-byte hash. This powerful method provides access to all block properties including transactions, gas metrics, miner information, timestamps, and more, making it essential for blockchain explorers and data analysis.

Use Cases

Block explorers and blockchain analytics platforms
Transaction verification and historical analysis
Network monitoring and performance metrics
Smart contract deployments confirmation and tracking
Historical data analysis and time-series research
Consensus verification and chain reorganization detection
Forensic blockchain analysis
Cross-chain block verification

Method Details

This method retrieves detailed data about a specific block using its hash as the identifier, with options to include either complete transaction details or just transaction hashes.

パラメータ:

hashstring[required]

The hash (32 bytes) of the block

transaction_detail_flagboolean[required]

If true, returns full transaction objects; if false, returns only transaction hashes

返り値:

resultobject

A block object, or null if no block was found

baseFeePerGasstring

Base fee per gas in hexadecimal (post EIP-1559)

difficultystring

The difficulty for this block in hexadecimal

extraDatastring

Extra data field of this block

gasLimitstring

Maximum gas allowed in this block in hexadecimal

gasUsedstring

Total gas used by all transactions in hexadecimal

hashstring

Hash of the block, null if pending

logsBloomstring

Bloom filter for the logs, null if pending

minerstring

Address of the miner/validator

mixHashstring

256-bit hash in hexadecimal

noncestring

Hash of the proof-of-work, null if pending

numberstring

Block number in hexadecimal, null if pending

parentHashstring

Hash of the parent block

receiptsRootstring

Root of the receipts trie

sha3Unclesstring

SHA3 of the uncles data

sizestring

Size of this block in bytes (hexadecimal)

stateRootstring

Root of the final state trie

timestampstring

Unix timestamp when the block was collated

totalDifficultystring

Total difficulty of the chain until this block

transactionsarray

Array of transaction objects or hashes

transactionsRootstring

Root of the transaction trie

unclesarray

Array of uncle hashes

withdrawalsarray

Array of validator withdrawals (post EIP-4895)

withdrawalsRootstring

Merkle root of withdrawals (post EIP-4895)

Response Example

{
	"jsonrpc": "2.0",
	"id": 1,
	"result": {
		"baseFeePerGas": "0x41a2b3591",
		"difficulty": "0x0",
		"extraData": "0x556e697377617020426c6f636b20231242353045",
		"gasLimit": "0x1c9c380",
		"gasUsed": "0x189b1f1",
		"hash": "0x4f32106f6ac5b44248aeda10c3e718f1048ddc274629cd1897a0ff1f7926c41e",
		"logsBloom": "0xe54b0921498ad482b83...[truncated]",
		"miner": "0x690B9A9E9aa1C9dB991C7721a92d351Db4FaC990",
		"mixHash": "0x51c1b337d7ec2023e7bfd47907a1ee256668e46fb9feb0007c62f9bc2a8a19a7",
		"nonce": "0x0000000000000000",
		"number": "0x112a880",
		"parentHash": "0xeea8dce30e2d7c2a7ffe35b6fc2c60782f59a123ff2812e85bf4a49839c6d5a2",
		"receiptsRoot": "0x14a87619e588c1ef9f8c69fd8e3dff2a49b2c73f19871a74a7e1d97d67d00416",
		"sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
		"size": "0x1284d",
		"stateRoot": "0xb87823a3aea0dd94ffe84481962c8f988e3c2ffac98a9af2b81c1c3e4fcc6dc0",
		"timestamp": "0x65f0d46e",
		"totalDifficulty": "0xc70d815d562d3cfa955",
		"transactions": [
			"0x5a8b22ab3e70ee6ee4b15b48b1c88d8c01806a677ab8938c68dc4323cf51ae7a",
			"0x8d2fcaa1aef4f4f19aa35bf9d91b34e24902efcaf670953a0bf7e0a6dc585e53"
			// ... additional transaction hashes
		],
		"transactionsRoot": "0x39f9c7a211b008becd35bfbceaf186d564fcb737a9c026f8af7b5d89a8989143",
		"uncles": [],
		"withdrawals": [
			{
				"index": "0x57ca86",
				"validatorIndex": "0x17384",
				"address": "0xb9d7934878b5fb9610b3fe8a5e441e8fad7e293f",
				"amount": "0x12a05f200"
			}
			// ... additional withdrawals
		],
		"withdrawalsRoot": "0x36a75a6993b676f8196354ed14e3c77167b9ae823211706b30aa125c3a5dac28"
	}
}

Key Block Properties Explained

number: The block number in the chain (height)
timestamp: Unix timestamp when the block was created (in seconds since epoch)
transactions: List of transactions included in this block
gasUsed/gasLimit: Actual gas consumed vs. maximum allowed
baseFeePerGas: Base fee per gas unit introduced in EIP-1559
miner: Address that received the block reward (validator in PoS)
difficulty: Mining difficulty (always 0 after The Merge)
totalDifficulty: Cumulative difficulty up to this block
withdrawals: Validator withdrawals available post-Shanghai upgrade

Transaction Detail Flag

The second parameter determines how transaction data is returned:

false: Only transaction hashes are returned (more efficient for block scanning)
true: Complete transaction objects are returned (useful when you need transaction details)

Practical Example

// Example of retrieving and processing a significant block
const significantBlocks = {
	'The Merge Block': '0x4f32106f6ac5b44248aeda10c3e718f1048ddc274629cd1897a0ff1f7926c41e',
	'First EIP-1559 Block': '0x9b83c12c569ba25654ce34563540e58a0f8acee4645178544a2a35ccfbdba6cc',
};

async function getHistoricalBlock(label) {
	const blockHash = significantBlocks[label];
	const blockInfo = await provider.send('eth_getBlockByHash', [blockHash, false]);

	// Analysis
	const timestamp = new Date(parseInt(blockInfo.timestamp, 16) * 1000);
	const gasUsedPercent = (parseInt(blockInfo.gasUsed, 16) / parseInt(blockInfo.gasLimit, 16)) * 100;

	console.log(`${label} mined on ${timestamp.toUTCString()}`);
	console.log(`Gas utilization: ${gasUsedPercent.toFixed(2)}%`);
	console.log(`Transactions: ${blockInfo.transactions.length}`);
}

eth_getBlockByHash