eth_estimateGas | Hyperliquid EVM

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Parameters

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Transaction object

• from (string, optional) — The address the transaction is sent from
• to (string, optional) — The address the transaction is directed to
• gas (string, optional) — Integer of the gas provided for the transaction execution
• gasPrice (string, optional) — Integer of the gasPrice used for each paid gas
• value (string, optional) — Integer of the value sent with this transaction
• data (string, optional) — The compiled code of a contract OR the hash of the invoked method signature and encoded parameters

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Response

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Response structure

• result — The estimated gas amount as a hexadecimal string

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Gas estimation accuracy

• Estimates are based on the latest block state only (Hyperliquid limitation)
• Actual gas usage may vary if state changes before execution
• Complex transactions may have less accurate estimates
• Include a buffer (10-20%) when using estimates for actual transactions

• Contract complexity and execution paths
• State changes between estimation and execution
• Gas price fluctuations and network congestion
• Dynamic contract behavior based on inputs

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Usage example

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Basic implementation

// Estimate gas for a transaction on Hyperliquid
const estimateGas = async (transactionObject) => {
  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_estimateGas',
      params: [transactionObject],
      id: 1
    })
  });
  
  const data = await response.json();
  const gasEstimate = parseInt(data.result, 16);
  
  return {
    hex: data.result,
    decimal: gasEstimate,
    withBuffer: Math.ceil(gasEstimate * 1.2) // Add 20% buffer
  };
};

// Example: Estimate gas for an ERC-20 transfer
const estimateTokenTransfer = async () => {
  const transaction = {
    from: "0xFC1286EeddF81d6955eDAd5C8D99B8Aa32F3D2AA",
    to: "0x5555555555555555555555555555555555555555", // Token contract
    data: "0xa9059cbb000000000000000000000000fefefefefefefefefefefefefefefefefefefefe0000000000000000000000000000000000000000000000000de0b6b3a7640000"
  };
  
  try {
    const estimate = await estimateGas(transaction);
    console.log(`Estimated gas: ${estimate.decimal}`);
    console.log(`Recommended gas limit: ${estimate.withBuffer}`);
    return estimate;
  } catch (error) {
    console.error('Gas estimation failed:', error);
    throw error;
  }
};

// Usage
estimateTokenTransfer()
  .then(estimate => console.log('Gas estimation successful:', estimate))
  .catch(error => console.error('Error:', error));

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Best practices

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Transaction preparation

• Always estimate gas before sending transactions
• Add a reasonable buffer (10-20%) to prevent out-of-gas errors
• Use estimates for transaction cost calculations
• Test estimates with various input parameters

• Estimates are based on latest block state only
• Monitor actual vs estimated gas usage for optimization
• Implement fallback gas limits for critical transactions

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Example request

curl -X POST \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{"from":"0xFC1286EeddF81d6955eDAd5C8D99B8Aa32F3D2AA","to":"0x5555555555555555555555555555555555555555","data":"0xa9059cbb000000000000000000000000fefefefefefefefefefefefefefefefefefefefe0000000000000000000000000000000000000000000000000de0b6b3a7640000"}],"id":1}' \
  https://hyperliquid-mainnet.core.chainstack.com/4f8d8f4040bdacd1577bff8058438274/evm

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Use cases

• Transaction cost calculation: Estimate gas costs before sending transactions
• Wallet applications: Display transaction fees to users before confirmation
• DeFi protocols: Calculate gas costs for complex multi-step transactions
• Smart contract deployment: Estimate deployment costs for contracts
• Batch operations: Plan gas usage for batch transactions and operations
• Trading platforms: Estimate gas costs for trading operations and swaps
• NFT marketplaces: Calculate minting and trading gas costs
• Gaming applications: Estimate gas for in-game transactions and operations
• Automated systems: Set appropriate gas limits for automated transactions
• Cost optimization: Compare gas costs across different transaction methods
• User experience: Prevent transaction failures due to insufficient gas
• Analytics platforms: Analyze gas usage patterns and optimization opportunities
• Development tools: Test and optimize smart contract gas efficiency
• Portfolio management: Calculate total transaction costs for portfolio operations
• Cross-chain bridges: Estimate gas costs for bridge operations
• Governance systems: Calculate voting and proposal submission costs
• Staking platforms: Estimate gas costs for staking and delegation operations
• Lending protocols: Calculate gas costs for lending and borrowing operations
• Insurance platforms: Estimate gas costs for claim processing and payouts
• Supply chain: Calculate gas costs for supply chain tracking operations
• Identity systems: Estimate gas costs for identity verification transactions
• Subscription services: Calculate gas costs for recurring payment operations
• Audit tools: Analyze gas usage for security and efficiency audits
• Educational platforms: Demonstrate gas concepts and optimization techniques
• Research tools: Study gas usage patterns and blockchain economics