Metamask: step by step to pass the polygonal to the smart contract
Polygon (Formly A Matic) Blockchain Developer Probably Struggled with Problems From the Tokens’ Wallet with the Help of Metamask. Don’t Worry; In this article, we go through the process of creating and implementation a function that sends polygonal to your contract.
Prerequisites
Before You Continue, Make Sure That:
- The Metamask Wallet is set on your mobile device.
- The smart contract is installed on the polygon blockchain (polygon.js or remix).
3.
Step 1: Create a new feature
Create a new feature in your contract that accepts polygonal tokens as an input and send them to your wallet:
`Solidity
Pragma Solidity ^0.8.0;
Contract my contract {
// Determine the Token Amount and the Addressee's Address
Uint256 Public Amount;
The Title of the Public Recipient;
// function to sign up polygonal tokens
Function Subscribe (Uint256 Amount, Address Recipient) Public {
Demand (Amount> 0, "The Amount Must Be Larger Than Zero");
Demand (Recipient! = Address (0), "The recipient must be a valid address");
// Transfer to the contracted wallet
(Bool Success,) = Pay.transferrom (MSG.Sender, Address (This), Amount);
if (! Success) {
console.log ("the transfer failed");
}
}
}
Step 2: Determine the “Subscription” function
In Your Metamask Settings, Add a New Feature with the Following Features:
* Name : Subscription '
* Function name :<-crech-to-go.
* Library : Polygon.js (or remix)
* Args : Uint256 (Sum, Address (Recipient))
The “Amount” Argument Must Be The Amount You Want To Send And The “Recipient” Argument is the Title of the Contractual Wallet.
Step 3: Test the function
- Open Metamask on your mobile device.
- Select “Connect”> “Add metamask” or use an existing account.
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- Go to the Contract Page and Click “Subscription”.
- Enter the Token Amount (for Example, 1 Mumbai) and Enter the Addressee’s Address (The Contractual Wallet).
Expected Result
Once you have called the “subscription” feature, you should see a success message in the console indicating that the tokens have leg transferred to the contract wallet.
By following thesis steps, you have successful created a new feature to send the polygonmatic to your intelligent contract with the help of metamask. Remember to update the contract code Accordingly to accommodation the new feature.
Tips and variations
- Consider the Addition of Additional Checks or Logging Mechanisms to Handle Errors More Robust.
- You can also add the input validation of other parameters (for example, the “quantity” must be a positive honest).
- For more advanced uses, you may want to discover external libraries, such as web3.js or ethers.js to simplify token transactions.