eth_estimateGas - Base

// Installation instructions: https://github.com/alchemyplatform/alchemy-web3

async function main() {
	// alchemy-token-api/alchemy-web3-script.js
	import { createAlchemyWeb3 } from "@alch/alchemy-web3";
	
	// Replace with your Alchemy API key:
	const apiKey = "demo";
	
	// Initialize an alchemy-web3 instance:
	const web3 = createAlchemyWeb3(
	  `https://eth-mainnet.g.alchemy.com/v2/${apiKey}`,);
	
	// Query the blockchain (replace example parameters)
    	const estGas = await web3.eth.estimateGas({
	    from: "0xge61df",
	    to: "0x087a5c",
	    data: "0xa9059c",
	    gasPrice: "0xa994f8",
	  }) 

	// Print the output to console
  	console.log(estGas);
   }

main();

// Installation instructions: https://docs.ethers.io/v5/getting-started/#installing

async function main() {
   const { ethers } = require("ethers");
   
	// Replace with your Alchemy API key:
	const apiKey = "demo";

	// Initialize an ethers instance
	const provider = new ethers.providers.JsonRpcProvider('https://eth-mainnet.g.alchemy.com/v2/${apiKey}',);

	// Query the blockchain (replace example parameters)
    	const estGas = await provider.estimateGas({
	    from: "0xge61df",
	    to: "0x087a5c",
	    data: "0xa9059c",
	    gasPrice: "0xa994f8",
	  }) 

	// Print the output to console
  	console.log(estGas);

   }

main()

# Installation Instructions: https://web3py.readthedocs.io/en/latest/quickstart.html#installation

from web3 import Web3, HTTPProvider

#Replace with your Alchemy API key:
const apiKey = "demo";

# Initialize a Web3.py instance
web3 = Web3(Web3.HTTPProvider('https://eth-mainnet.g.alchemy.com/v2/${apiKey}'))

# Query the blockchain (replace example parameters)
estGas = web3.eth.estimate_gas({
     'to': '0xd3CdA913deB6f67', 
     'from':web3.eth.coinbase, 
     'value': 12345
     })

# Print the output to console
print(estGas)

curl https://eth-mainnet.g.alchemy.com/v2/your-api-key \
-X POST \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{"from": "0x8D97689C9818892B700e27F316cc3E41e17fBeb9","to": "0xd3CdA913deB6f67967B99D67aCDFa1712C293601","value": "0x186a0"}],"id":1}'

URL: https://eth-mainnet.g.alchemy.com/v2/your-api-key
RequestType: POST
Body: 
{
    "jsonrpc":"2.0",
    "method":"eth_estimateGas",
    "params":[{
    "from": "0x8D97689C9818892B700e27F316cc3E41e17fBeb9",
    "to": "0xd3CdA913deB6f67967B99D67aCDFa1712C293601",
    "value": "0x186a0"
    }],
    "id":1
}

// Setup: npm install alchemy-sdk
// Github: https://github.com/alchemyplatform/alchemy-sdk-js
import { Network, Alchemy, parseEther } from "alchemy-sdk";

// Optional config object, but defaults to demo api-key and eth-mainnet.
const settings = {
  apiKey: "demo", // Replace with your Alchemy API Key.
  network: Network.ETH_MAINNET, // Replace with your network.
};
const alchemy = new Alchemy(settings);

alchemy.core
  .estimateGas({
    // Wrapped ETH address
    to: "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
    // `function deposit() payable`
    data: "0xd0e30db0",
    // 1 ether
    value: parseEther("1.0"),
  })
  .then(console.log);

{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x5208" // 21000
}