Ethereum: How to use native token as fee in CCIP local unit tests?

Use of native tokens as expense in unit tests for local CCIP units

When you test decentralized applications (DAPP) on Ethereum Testnet or Mainnet, it is essential to have a reliable and effective way to manage transaction costs. In this article, we will explore how to use native tokens as ETH as a fees in unit tests for the cross -interoperability protocol (CCIP).

Configuration of unit tests for CCIP with the link token

When you use the link as a fresh token on Ethereum Testnet or Mainnet, we can take advantage of the management of native tokens to simplify our test process. Here is a step by step guide:

Configure a test portfolio : Create a new test portfolio on Ethereum Testnet (for example, alchemy testnet) and define it as default portfolio.

Install the necessary dependencies : Install Truffes' for the development of contracts, Web3.jsto interact with the blockchain andcipc-testerto test the CCIP functionality.

Define a series of tests
: Create a new test file (for example,Eth.tet.js) and Import 'CCIP-TESTER. Define a simple test case that uses the link as a fresh token:

`Javascript



Const {ccip} = require ('./ cipc');

Const {alchemytetnet} = require ('alchemy-testnet');

Describe ('ethfee', () => {

  it ('should pay ETH for each transaction', async () => {

    Const contract = New CCIP ();

    Const txid = wait for contract.

      De: '0x ...', // address of the sender

      to: '0x ...',

      Value: 100,

      Gasprice: '1e8',

    });

    Const result = wait txid.wait (10);

    wait (result.status) .Tobe ('ok');

    Wait (Result.txhash) .not.Tobeundefined ();

    Wait (Result.Value) .Toblesshan (txid.gasprice * 10); // eth

  });

});

'

Run the test: Compile and execute the contract on Ethereum TESTNET (for example, alchemy testnet) using compile and runtruffles.




 Check the results : Observe that your test passes without paying ETH for each transaction.


 Use of native tokens as expenses in unit tests 


Now, modify our testing of tests to use ETH as a fresh token:

Replace the link with ETH : update the variableLinkin the test file to point an ETH account on the Ethereum Testhemnet (for example, ALCHEMY TESTNET).




 Change the test case : update the test case to use ETH as a fees:

Javascript



Const {ccip} = require ('./ cipc');

Const {alchemytetnet} = require ('alchemy-testnet');

Describe ('ethfee', () => {

  it ('should pay ETH for each transaction', async () => {

    Const contract = New CCIP ();

    Const txid = wait for contract.

      De: '0x ...', // address of the sender

      to: '0x ...',

      Value: 100,

      Gasprice: '1e8',

      Fresh: "0.01",

    });

    Const result = wait txid.wait (10);

    wait (result.status) .Tobe ('ok');

    Wait (Result.txhash) .not.Tobeundefined ();

    wait (result.value) .Toblesshan (txid.gasprice * 100); // eth

  });

});

'

Run the test: Compile and execute the contract on Ethereum TESTNET (for example, alchemy testnet) using compile and run` truffle truffle.

Check the results : Observe that your test passes without paying ETH for each transaction.

Conclusion

By taking advantage of native tokens like ETH as a fees, we can simplify our unit tests for CCIP on Ethereum Testnet or Mainnet. This approach not only saves time, but also provides a more effective way to manage transaction costs, which facilitates the development and test of decentralized applications.

Ethereum: How to use native token as fee in CCIP local unit tests?

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