The simulateTransferErc20 function within the Transaction Simulator extension is instrumental for simulating ERC20 token transfers on EVM-based blockchains. This function allows developers to comprehend and test the behavior of ERC20 token transfers without interacting with the live blockchain. This guide delineates the steps to utilize the simulateTransferErc20 function to enrich your blockchain projects.

How to Simulate an ERC20 Transfer

Utilize the provided library to simulate an ERC20 transfer on an EVM-based blockchain.

// Import necessary libraries
import { TatumSDK, Network, Ethereum } from '@tatumio/tatum';
import { simulateTransferErc20, Erc20Transfer } from '@tatumio/transaction-simulator';

// Initialize the SDK for a specific blockchain network
const tatumSdk = await TatumSDK.init<Ethereum>({
     network: Network.ETHEREUM,
     configureExtensions: [
         TransactionSimulator,
     ]
 })

// Define Your Payload
const tokenTransferPayload: TokenTransfer = {
  to: 'recipient_address',
  from: 'sender_address',
  gas: '0xB411', // optional
  gasPrice: '0x4B16C370A', //optional
  value: 500, // example token amount to send
  tokenContractAddress: 'your_erc20_token_contract_address'
};

// Call simulateTransferErc20
const tokenSimulationResult = await simulateTransferErc20(tokenTransferPayload);

// Check simulation results
console.log(tokenSimulationResult);

// Import necessary libraries
import { TatumSDK, Network, Ethereum } from '@tatumio/tatum';
import { TransactionSimulator } from '@tatumio/transaction-simulator';

// Initialize the SDK for a specific blockchain network
const tatumSdk = await TatumSDK.init<Ethereum>({
     network: Network.ETHEREUM,
     configureExtensions: [
         TransactionSimulator,
     ]
 })

// Define Your Payload
const tokenTransferPayload: TokenTransfer = {
  to: 'recipient_address',
  from: 'sender_address',
  gas: '0xB411', // optional
  gasPrice: '0x4B16C370A', //optional
  value: 500, // example token amount to send
  tokenContractAddress: 'your_erc20_token_contract_address'
};

// Call simulateTransferErc20
const tokenSimulationResult = await await tatumSdk.extension(TransactionSimulator)
.simulateTransferErc20(tokenTransferPayload);

// Check simulation results
console.log(tokenSimulationResult);

Parameters

to: Address of the recipient.
from: Address of the sender.
gas: (Optional) Gas limit for the transaction.
gasPrice: (Optional) Gas price for the transaction.
value: Amount to send in wei.
tokenContractAddress : Token address you want to interact with.

Expected Response

{
  "transactionDetails": {
    "from": "0xDce92f40cAdDE2C4e3EA78b8892c540e6bFe2f81",
    "to": "0xaf758da9f7bdaa7590175193388e9c99427cc2d2",
    "tokenContractAddress": "0xdac17f958d2ee523a2206206994597c13d831ec7",
    "data": "0xa9059cbb000000000000000000000000af758da9f7bdaa7590175193388e9c99427cc2d2000000000000000000000000000000000000000000000000000000001908b100",
    "gasLimit": 46097,
    "gasPrice": 20156528394
  },
  "status": "success",
  "balanceChanges": {
    "0xDce92f40cAdDE2C4e3EA78b8892c540e6bFe2f81": {
      "from": 243656557299636170000,
      "to": 243655628144146780000
    }
  },
  "tokenTransfers": {
    "0xdac17f958d2ee523a2206206994597c13d831ec7": {
      "name": "TetherUSD",
      "symbol": "USDT",
      "decimals": 6,
      "0xDce92f40cAdDE2C4e3EA78b8892c540e6bFe2f81": {
        "from": 2387468.080258,
        "to": 2387048.080258
      },
      "0xaf758da9f7bdaa7590175193388e9c99427cc2d2": {
        "from": 422.304,
        "to": 842.304
      }
    }
  }
}

Use Cases

Development and Testing: Simulate ERC20 transactions to test smart contracts, DApps, and other blockchain functionalities in a risk-free environment.
Education and Training: Foster practical blockchain education by simulating real-world ERC20 transaction scenarios.
Hackathons: Empower participants to grasp the implications of ERC20 transactions without the necessity of a live blockchain.

Summary

The simulateTransferErc20 function in the Transaction Simulator submodule is a robust tool intended to provide a simulated environment for understanding and testing ERC20 token transfers on EVM-based blockchains. Utilising this function will enable developers, educators, and blockchain enthusiasts to bolster their understanding and expedite their projects within the blockchain ecosystem.