CRYPTOCURRENCY

Ethereum: Combine token approval and contract invocation in a single call

Posted on by chang mr.

Collecting a token approval and provocation of contract at éters.Js

Interacting with decentralized applications (DAPP) above Ethereum, one common formula includes a token transmission to an intelligent contract. However, this can lead to unnecessary directors and possible safety risks associated with the two individual calls required: confirmation of the marker and the invitation of the contract.

We make two separate calls in the current implementation:

  • Token.

  • "The contract is expected.myfunction ();" - Proposal of contract function using approved tokens.

This approach can be cumbersome and sensitive to errors as it requires manual management of the approval process and ensures that only special functions are called in the contract.

One call introduction: confirmation marker and provoking a contract on the air.JS

To simplify this process and reduce the unnecessary overheads, we will introduce a new method called "Confirmed". This feature combines the token confirmation with the invitation of the contract into one call.

JavaScript

Importing ether {ether};

/**

* Combines token approval and provoked contract in one call.

*

* @param {string} tokenaddress – Address marker for approval.

* @Param {string} Contractdress – an intelligent contract address to be generated.

* @param {number} Marker sum for approval of the contract.

*//

The async function confirmed Andinvoche (Tokenaddress, Contractaddress, Sum) {

// Get the service provider’s case

Const Provider = Gaids ethers.getprovider ();

// to approve the marker for a specified contract

Const confirmed = service provider approved (Tokenaddress, Contractaddress, amount);

If (! Surroundings) discard a new error (“Earlier Confirmation Failed”);

// cause a contract function using approved tokens

Try {

The service provider is expected.

} Catch (error) {

Console.Error (error); // marker approval and induction failed

}

}

export the default approval of the Andinvok;

`

Example of use

`JavaScript

Import {confirm andinvoche}.

// Replace your marker address, contract address and amount

Const tokenaddress = ‘0x …’; // Replace the actual token address

Const Contractaddress = ‘0x …’; // Replace the actual address of the contract

Const Sum = 10n;

Confirmation and Tokenaddress, Agreement, Amount) .Then (() => {{{{{

Console.log (“Markers approved and successfully proposed!”);

}). Catch ((error) => {

Console.Error (error); // marker approval and induction failed

});

`

This “approval and function” feature takes over the necessary parameters, approves the markers of the contract kit and provokes the function of the contract with these approved tokens. This approach reduces the cost of approval of manual tokens and provokes the contract, making it a more convenient and safer way to interact with DAPP on top of Ethereum.

chang mr.