Skip to main content
POST
/
evm
eth_blockNumber
curl --request POST \
  --url https://hyperliquid-mainnet.core.chainstack.com/4f8d8f4040bdacd1577bff8058438274/evm \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "method": "eth_blockNumber",
  "params": [],
  "id": 1
}
'
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x1b4"
}
This method is available on Chainstack. Not all Hyperliquid methods are available on Chainstack, as the open-source node implementation does not support them yet — see Hyperliquid methods for the full availability breakdown.
The eth_blockNumber JSON-RPC method returns the number of the most recent block on the Hyperliquid EVM blockchain. This method is fundamental for tracking blockchain state, monitoring synchronization status, and implementing block-based logic in applications.
Get your own node endpoint todayStart for free and get your app to production levels immediately. No credit card required.You can sign up with your GitHub, X, Google, or Microsoft account.

​
Parameters

This method takes no parameters. The params field should be an empty array.

​
Response

The method returns the current block number as a hexadecimal string.

​
Response structure

Block information:
  • result — The current block number as a hexadecimal string (e.g., “0x1b4” which equals 436 in decimal)

​
Block number interpretation

Hexadecimal format:
  • Block numbers are returned in hexadecimal format with “0x” prefix
  • Convert to decimal for human-readable block height
  • Example: “0x1b4” = 436 in decimal
Usage patterns:
  • Track blockchain progression and new block creation
  • Implement block-based polling and event detection
  • Verify synchronization status with other nodes
  • Calculate block intervals and timing

​
Usage example

​
Basic implementation

// Get current block number
const getCurrentBlockNumber = async () => {
  const response = await fetch('https://hyperliquid-mainnet.core.chainstack.com/YOUR_ENDPOINT/evm', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      jsonrpc: '2.0',
      method: 'eth_blockNumber',
      params: [],
      id: 1
    })
  });
  
  const data = await response.json();
  const blockNumber = parseInt(data.result, 16);
  
  return {
    hex: data.result,
    decimal: blockNumber
  };
};

// Poll for new blocks
const pollForNewBlocks = async (callback) => {
  let lastBlockNumber = 0;
  
  const checkForNewBlock = async () => {
    try {
      const { decimal: currentBlock } = await getCurrentBlockNumber();
      
      if (currentBlock > lastBlockNumber) {
        lastBlockNumber = currentBlock;
        callback(currentBlock);
      }
    } catch (error) {
      console.error('Error checking block number:', error);
    }
  };
  
  // Poll every 2 seconds
  setInterval(checkForNewBlock, 2000);
};

// Usage
pollForNewBlocks((blockNumber) => {
  console.log(`New block: ${blockNumber}`);
});

​
Example request

Shell
curl -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' \
  https://hyperliquid-mainnet.core.chainstack.com/4f8d8f4040bdacd1577bff8058438274/evm

​
Use cases

The eth_blockNumber method is essential for applications that need to:
  • Blockchain monitoring: Monitor blockchain health, synchronization, and block progression
  • Event detection: Implement efficient event detection and monitoring systems
  • Transaction tracking: Track transaction confirmations and finality status
  • Synchronization verification: Verify node synchronization and detect lag issues
  • Block-based logic: Implement application logic that depends on block heights
  • Performance monitoring: Monitor network performance and block creation times
  • Data consistency: Ensure data consistency across blockchain state changes
  • Polling optimization: Implement efficient polling mechanisms for blockchain data
  • Cache management: Manage cache invalidation and data freshness using block numbers
  • Analytics platforms: Build analytics tools that track blockchain metrics over time
  • Trading applications: Implement trading logic that depends on block timing
  • DeFi protocols: Build DeFi applications with block-aware functionality
  • NFT platforms: Track NFT transactions and state changes across blocks
  • Gaming applications: Implement blockchain-based gaming with block-dependent mechanics
  • Oracle services: Provide block-aware oracle data and timing services
  • Cross-chain bridges: Coordinate cross-chain operations using block numbers
  • Governance systems: Implement governance mechanisms with block-based voting periods
  • Staking protocols: Track staking rewards and penalties across block intervals
  • Audit tools: Build audit tools that analyze blockchain state across blocks
  • Development frameworks: Create development tools with block-aware debugging
  • Testing suites: Implement blockchain testing with block progression simulation
  • Load balancers: Distribute load based on node synchronization status
  • Health checks: Monitor node health and blockchain connectivity
  • Alerting systems: Create alerts based on block progression and timing anomalies
This method provides fundamental blockchain state information, enabling robust and block-aware applications on the Hyperliquid EVM platform.

Body

application/json
​
jsonrpc
enum<string>
default:2.0
required

JSON-RPC version

Available options:
2.0
​
method
enum<string>
default:eth_blockNumber
required

The RPC method name

Available options:
eth_blockNumber
​
id
integer
default:1
required

Request identifier

​
params
array

Parameters for the method (empty array for eth_blockNumber)

Response

200 - application/json

Successful response with the current block number

​
jsonrpc
string

JSON-RPC version

​
id
integer

Request identifier

​
result
string

The current block number as a hexadecimal string

Last modified on March 19, 2026