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Implementation of the Saltan subscription function
As a popular blockchain platform, Solana has gained significant attention in recent years. One of the most exciting functions offered by Solana is the ability to create scalable and safe subscription systems. In this article, we will examine how to implement the Solan subscription function.
Understand Saltan subscription models
Before the immersion in the implementation, it is necessary to understand several subscription models available in Solaing:
- Fixed rate : Users pay a fixed amount of tokens solana every month.
- Variable rate : Users are charged on the basis of the volume of transactions or other factors.
- Service with added value (VAS)
: Users pay specific services, such as access or storage access.
Implementation of the Saltan subscription function
To implement the Saltan subscription function, you must create a system based on events that trigger payment processing every month. Here is a step by step guide:
Step 1: Create a payment event
Create a new event called “PaymenteVent” with two types of events: ‘Subscribe’ and ‘reduce subscription’. The “Subscription” event will be launched when users subscribe to their service, while the “Underbibe” event will be launched after the subscription.
`Solidity
Pragma solidity ^0.8.0;
Contract subscription system {
Struct Paynive {
management sender;
Uint256 quantity;
Monitoring message;
}
}
Step 2: Create a service provider
Create an interface for your service provider and define subscription logic. This interface will be used to create events that cause payment processing.
Solidity
Pragma solidity ^0.8.0;
Subscription of the Contractorvicevider {
Subscribe functions (user address) public phrases (bool) {
// impresses the logic to load the user every month
Requires (! User.subsssty: "The user is already subscribed");
User.subscripted = True;
return true;
}
Subscription disconnection function (user address) Public phrases (bool) {
// Implement the logic not to delay the user every month
User.subscripted = false;
return true;
}
}
Step 3: Create an event listener
Create an event listener that activates payment processing every month. This listener will be responsible for creating events and activating the logic of the subscription.
Solidity
Pragma solidity ^0.8.0;
Payment contract of the listener {
Mapping (address => uint256) public payments;
Createpaytendent () Public Returns Function Payment (Bool) {
requires (msg.value> 0, "no payment is required");
payments [msg.sender] += msg.value;
return true;
}
}
Step 4: Integrate with blockchain
Integrate the listener of the Blockchain events using a library as web3.js or Solana Sdk. This will allow the creation and management of events, as well as the release of payments processing based on the "Createpaytendevent" function.
JavaScript
Import {Web3} with "@web3js/web3";
const web3 = new web3 ();
ASYNC processing function (event) {
// create a new event for subscription
Const paynivent = new paynivent ();
paynivent.sender = event.address;
paynivent.amount = 0;
paynivent.message = 'paid subscription';
// Call the subscription logic, causing the "subscription" function of the service provider
Wait subscription.
}
Examples of use
Here is an example of how you can use this implementation to create a simple subscription system:
` JavaScript
Import {paymentlear} z “./subscriptslistener.sol”;
Import {subscripticeervicepider} z ‘./Subscriptionerviceprovider.