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This article mainly explains "how to use web3.eth.estimateGas". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn how to use web3.eth.estimateGas.

Estimate the amount of gas required to make the call. This method performs a message call or transaction in the node's VM, but does not modify the blockchain.

Call:

Web3.eth.estimateGas (callObject [, callback])

Parameters:

CallObject: Object-the transaction object to be sent, which can contain the following fields:

From: String-the address of the specified sender. If not specified, web3.eth.defaultAccount is used.

To: String-(optional) the destination address of the transaction message. If it is a contract creation, it is not filled in.

Value: Number | String | BigNumber-(optional) the amount of currency carried by the transaction, in wei. If the contract creates a transaction, it is the initial fund.

Gas: Number | String | BigNumber-(optional) default is automatic, gas can be used for transactions, and unused gas will be returned.

GasPrice: Number | String | BigNumber-(optional) the gas price of the transaction is determined automatically by default. The default is the average network gas price.

Data: String-(optional) or a byte string containing the relevant data, or, in the case of contract creation, the code to be used for initialization.

Nonce: Number-(optional) integer, using this value, allows you to override your own transactions in the same nonce, which are in pending 11.

Callback:Function-callback function to support asynchronous execution

Return value:

Number-gas spent by the simulated call/transcation.

Example:

Var result = web3.eth.estimateGas ({to: "0xc4abd0339eb8d57087278718986382264244252f", data: "0xc6888fa10000000000000000000000000000000000000000000000000000000000000003"}); console.log (result); / / output "0x0000000000000000000000000000000000000000000000000000000000000015" here, I believe you have a deeper understanding of "how to use web3.eth.estimateGas", you might as well do it in practice! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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