Here is an example of an article explaining how to send transactions from the metamask portfolio using the Node.js facilities with API Metamask:
Metamask transaction sending with backend php and node.js
In this article, we will discuss how to create a simple API interface in the back of the Node.JS application, which allows you to send transactions from the metamascus portfolio to other wallets.
preliminary requirements:
- Install node.js and metamask on your computer.
- Configure the local programming environment for PHP (e.g. Laravel or Express).
- Create an account from Metamask to test the API.
Project structure:
`Bash
Metamask-Aapi/
App.php
configurator/
batabase.php
public/
controllers/
index.php
Services/
TransactionService.php
routes/
api.php
seller/
autoload.php
app .js (Backend PHP file)
`Php
Use Illumine \ Support \ Faceades \ DB;
// connect to the database
$ Connection = DB :: Connect ("MySQL", [
"Host" => "Localhost",
"User" => "your_username",
"Password" => "your_password",
]);
// Define a new transaction service
TransactionService class {
CREATETAMACTION Public function ($ DATA) {
// check the input data
if (! ISSET ($ Data ['to']) ||! ISSET ($ Data ['amount'])) {
return false;
}
to try {
// perform a transaction
$ score = db :: insert ("transactions", [
'user_id' => auth ()-> id (),
"Wallet_id" => auth ()-> id (),
"Amount" => floatval ($ data ['amount']),
"Tx_hash" => Hash ("Sha256", Uniqid ()) // generate a unique TX_HASH for transactions
]);
if ($ score) {
return True;
} otherwise {
Quit a new exception ("the transaction failed");
}
} catch (exception $ e) {
return false;
}
}
}
// Create a new TransactionService instance
$ TransactionService = New TransationService ();
// Define the function of sending transactions from the Metamask portfolio
Sendtransaction function ($ to, $ amount) {
$ Data = [
"To '=> $ to,
"Amount" => $ amount
];
if (! $ transactionService-> Createtransaction ($ data)) {
return false;
}
// Return True to indicate a successful transaction
return True;
}
index.php (controller file)
`Php
Use Illumine \ HTTP \ request;
// Service of incoming demands from the Metamask portfolio
$ to = Request :: Input ('To');
$ amount = Request :: Input ("amount");
if (! ISET ($ to)) {
Return Response ()-> Json (['error' => 'incorrect to the address']);
}
if (! ISET ($ amount)) {
Return Response ()-> Json (['error' => 'incorrect amount']);
}
// Send a transaction using the SENDTRANSACTION function
$ response = sendtransaction ($ to, $ amount);
Return Response ()-> Json ($ response);
api.php (route file)
`Php
Use Illumine \ HTTP \ request;
Use APP \ HTTP \ Controllers \ TransactionService;
// Define a new route for sending transactions
Route :: "/Sendtransaction", [
"Name" => 'Sendtransaction',
"Uses" => function (demand $ request) {
Return TransactionService :: Sendtransaction ($ Request-> Input ('To'), $ Request-> Input ('amount'));
},
"Methods" => ['post']
]);
Explanation:
- In the “App.PHP” file we define a new transaction service using the Laravel container (eloquent ORM).
- The “CREATETAMSACTION” method checks the input data and performs a transaction in the database.
- In the “Sendtransaction” function, we download the Metamask portfolio address and the amount from the parameters of the request. Then we call the “Createtransaction” method to send a transaction.
- Finally, in the `/API/Sendtransaction ‘route file, we define a new route to send transactions using the Laravel route constructor.
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