Overview

This node operation estimates the gas required for a blockchain transaction using the Infura API. It is useful for developers and users who want to predict the gas cost before sending a transaction on Ethereum or compatible blockchains. For example, before executing a smart contract interaction or transferring tokens, users can estimate the gas to ensure they provide enough gas to avoid transaction failure.

Use Case Examples

1. Estimating gas for a token transfer transaction.
2. Estimating gas for a smart contract function call with specific data payload.

Properties

Output

JSON

• gasEstimate - Estimated gas amount in hexadecimal format.
• gasEstimateDecimal - Estimated gas amount converted to decimal number.
• transactionObject
  • from - Sender address used in the gas estimation.
  • to - Recipient address used in the gas estimation.
  • value - Value sent in the transaction used in the gas estimation.
  • data - Data payload used in the gas estimation.
• metadata
  • network - Blockchain network used for the request.
  • operation - Operation performed, here it is 'estimateGas'.
  • timestamp - Timestamp when the request was made.
  • infura_endpoint - The Infura API endpoint URL used for the request.
  • raw_response - Raw response data from the Infura API.

Dependencies

• Infura API key credential with project ID and optional project secret

Troubleshooting

• Ensure the 'from' and 'to' addresses are valid Ethereum addresses; invalid addresses will cause errors.
• The 'value' must be in hexadecimal format representing wei; incorrect format may cause request failure.
• If the Infura credentials (project ID and secret) are incorrect or missing, the API call will fail.
• Network connectivity issues to Infura endpoint can cause request timeouts or errors.

Links

• Infura API Documentation for eth_estimateGas - Official documentation for the gas estimation method used in this node.