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Returns an estimate of the gas that would be used in a transaction with the given parameters.


  1. Transaction: Object. A standard Ethereum transaction object containing the following fields:
    1. to: string. The destination address of the message.
    2. data: string (optional). Either a byte string containing the associated data of the message, or in the case of a contract-creation transaction, the initialisation code.
    3. value: string (optional). The value transferred for the transaction in wei, encoded as a hex string.
  2. BlockNumber: string (optional). The block number to get the gas estimate at. If omitted, the latest block is used.


Returns a Promise that resolves with a hex string containing the estimated gas.


const gas = await provider.request({
method: 'eth_estimateGas',
params: [
to: '0x...',
data: '0x...'
console.log(gas); // ['0x...']

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