Description

Simulates the asset changes resulting from a single transaction.

Returns list of asset changes that occurred during the transaction simulation. Note that this method does not run the transaction on the blockchain.

Parameters

transaction object parameters

Response

SimulateAssetChangesResponse object parameters

changes array property parameters

Example Request and Response

Prerequisite: You will need to install the Alchemy SDK before making requests with it.

The commands for installing it using npm or yarn are given below:

$
npm install alchemy-sdk@latest

Request

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// Imports the Alchemy SDK
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const { Alchemy, Network } = require("alchemy-sdk");
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// Configures the Alchemy SDK
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const config = {
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    apiKey: "alchemy-replit", // Replace with your API key
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    network: Network.ETH_MAINNET, // Replace with your network
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};
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// Creates an Alchemy object instance with the config to use for making requests
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const alchemy = new Alchemy(config);
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const main = async () => {
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    // define the transaction hash
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    const trnx = "0x88df016429689c079f3b2f6ad39fa052532c56795b733da78a91ebe6a713944b";
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    //Call the method to display the transaction based on the transaction hash
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    const response = await alchemy.transact.simulateAssetChanges(trnx)
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    //Logging the response to the console
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    console.log(response)
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}
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main();

Response

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{
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    "changes": [
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        {
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            "assetType": "NATIVE",
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            "changeType": "TRANSFER",
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            "from": "0xa7d9ddbe1f17865597fbd27ec712455208b6b76d",
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            "to": "0xf02c1c8e6114b1dbe8937a39260b5b0a374432bb",
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            "rawAmount": "4290000000000000",
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            "decimals": 18,
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            "symbol": "ETH",
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            "name": "Ethereum",
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            "logo": "https://static.alchemyapi.io/images/network-assets/eth.png",
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            "amount": "0.00429"
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        }
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    ],
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    "gasUsed": "0x0"
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}

Use Cases

Here are some potential use cases for the simulateAssetChanges method:

• Testing: Developers can use simulateAssetChanges to test their smart contracts before deploying them to a blockchain network. By simulating the changes that would occur, developers can identify potential errors and debug their code.

• Optimizing asset transactions: Businesses that regularly perform asset transactions, such as banks or trading firms, can use simulateAssetChanges to optimize their transaction strategies. These firms can identify the most efficient ways to move assets between accounts by simulating different transaction scenarios.

Related Methods

Here are the methods related to simulateAssestChanges:

• simulateAssetChangesBundle: Simulates the asset changes resulting from a list of transactions simulated in sequence.