The Truffle test encounters an issue: "Error: Trying to execute a transaction that calls a contract function, but the recipient address ___ is not a contract address."

Question

The Truffle test encounters an issue: "Error: Trying to execute a transaction that calls a contract function, but the recipient address ___ is not a contract address."

Every time I run truffle test in the terminal, I encounter the following error message:

Error: Attempting to run a transaction which calls a contract function, but the recipient address 0x3ad2c00512808bd7fafa6dce844a583621f3df87 is not a contract address

. I find this puzzling because my build folder appears to be normal. When I execute truffle migrate --reset, the address in the terminal matches the address in the build file. The migration process works fine. However, each time I run the truffle test, the recipient address seems to change. I'm unsure of what steps to take next and would appreciate any assistance.

It is worth mentioning that this error occurs only when I implement the following code: selfdestruct(admin);. In this scenario, the admin is equal to msg.sender, which refers to the initial account in the ganache setup. I'm at a loss as to what might be causing this issue.

I have been following this tutorial video. While I successfully completed all the previous tutorials by this individual, I am now stuck at minute 15:11, where he carries out the final test without any issues. Unfortunately, for me, it results in the error mentioned above.

If anyone has a solution, I would greatly appreciate the assistance.

Here is my test (javascript):

var CinoCoin = artifacts.require("./CinoCoin.sol");
var CinoCoinSale = artifacts.require("./CinoCoinSale.sol");

// Contract testing code continues below...

And here is the contract code (solidity):

pragma solidity ^0.4.23;

import "./CinoCoin.sol";

contract CinoCoinSale {
  // Contract implementation goes here...
}

When I comment out the selfdestruct(admin); line, the tests pass without any issues. This indicates that the problem might be related to that particular line. Your help is much appreciated. Thank you.

javascript json ethereum solidity truffle

Answer 1

Answer №1

Great job on resolving the error swiftly. Upon reviewing your code, I found that the test file is quite intricate to navigate due to the extensive promise chains. I took the liberty to refactor the file using async/await, which should make it easier to manage and debug in the future.

Furthermore, I observed that you are manually verifying emitted events and reverts by inspecting the logs and catching the revert exception. To streamline this process, I have incorporated a library that simplifies these tasks. I have included the necessary code for integrating this library as well.

To install the library via npm, use the following command:

npm install truffle-assertions

Following this installation, your new test code should function correctly. I trust this modification will prove beneficial to your Dapp development endeavors. Best of luck!

const CinoCoin = artifacts.require("CinoCoin");
const CinoCoinSale = artifacts.require("CinoCoinSale");
const truffleAssert = require("truffle-assertions");

contract('CinoCoinSale', function(accounts) {
  let tokenInstance;
  let tokenSaleInstance;
  let admin = accounts[0];
  let buyer = accounts[1];
  let tokenPrice = 1000000000000000; // in wei 0.01 ether
  let tokensAvailable = 750000;

  it('initializes the contract with the correct values', async function() {
    tokenInstance = await CinoCoin.deployed();
    tokenSaleInstance = await CinoCoinSale.deployed();

    assert.notEqual(tokenSaleInstance.address, 0x0, 'has contract address');
    assert.notEqual(await tokenSaleInstance.tokenContract(), 0x0, 'has token contract address');
    assert.equal(await tokenSaleInstance.tokenPrice(), tokenPrice, 'token price is correct');
    assert.equal(await tokenSaleInstance.admin(), admin, 'admin is correct');
  });

  it('facilitates token buying', async function() {
    tokenInstance = await CinoCoin.deployed();
    tokenSaleInstance = await CinoCoinSale.deployed();
    await tokenInstance.transfer(tokenSaleInstance.address, tokensAvailable, { from: admin });

    const numberOfTokens = 10;
    const receipt = await tokenSaleInstance.buyTokens(numberOfTokens, { from: buyer, value: numberOfTokens * tokenPrice });

    truffleAssert.eventEmitted(receipt, 'Sell', (ev) => {
      return ev._buyer === buyer && ev._amount.toNumber() === numberOfTokens;
    });

    const tokensSold = await tokenSaleInstance.tokensSold();
    assert.equal(tokensSold.toNumber(), numberOfTokens, 'increments the number of tokens sold');

    const buyerBalance = await tokenInstance.balanceOf(tokenSaleInstance.address);
    assert.equal(buyerBalance.toNumber(), numberOfTokens);

    const tokenSaleBalance = await tokenInstance.balanceOf(tokenSaleInstance.address);
    assert.equal(tokenSaleBalance.toNumber(), tokensAvailable - numberOfTokens);

    truffleAssert.reverts(
      tokenSaleInstance.buyTokens(numberOfTokens, { from: buyer, value: 1 }),
      null,
      'msg.value must equal number of tokens in wei'
    );

    truffleAssert.reverts(
      tokenSaleInstance.buyTokens(800000, { from: buyer, value: numberOfTokens * tokenPrice }),
      null,
      'connot purchase more tokens than available'
    );
  });

  it('ends token sale', async function () {
    tokenInstance = await CinoCoin.deployed();
    tokenSaleInstance = await CinoCoinSale.deployed();

    truffleAssert.reverts(tokenSaleInstance.endSale({ from: buyer }), null, 'must be admin to end sale');

    await tokenSaleInstance.endSale({ from: admin });

    const adminBalance = await tokenInstance.balanceOf(admin);
    assert.equal(adminBalance.toNumber(), 999990, 'returns all unsold cino coins to admin');

    const tokenPrice = await tokenSaleInstance.tokenPrice();
    assert.equal(tokenPrice.toNumber(), 0, 'token price was reset');
  });
});

Answer 2

Great job on resolving the error swiftly. Upon reviewing your code, I found that the test file is quite intricate to navigate due to the extensive promise chains. I took the liberty to refactor the file using async/await, which should make it easier to manage and debug in the future.

Furthermore, I observed that you are manually verifying emitted events and reverts by inspecting the logs and catching the revert exception. To streamline this process, I have incorporated a library that simplifies these tasks. I have included the necessary code for integrating this library as well.

To install the library via npm, use the following command:

npm install truffle-assertions

Following this installation, your new test code should function correctly. I trust this modification will prove beneficial to your Dapp development endeavors. Best of luck!

const CinoCoin = artifacts.require("CinoCoin");
const CinoCoinSale = artifacts.require("CinoCoinSale");
const truffleAssert = require("truffle-assertions");

contract('CinoCoinSale', function(accounts) {
  let tokenInstance;
  let tokenSaleInstance;
  let admin = accounts[0];
  let buyer = accounts[1];
  let tokenPrice = 1000000000000000; // in wei 0.01 ether
  let tokensAvailable = 750000;

  it('initializes the contract with the correct values', async function() {
    tokenInstance = await CinoCoin.deployed();
    tokenSaleInstance = await CinoCoinSale.deployed();

    assert.notEqual(tokenSaleInstance.address, 0x0, 'has contract address');
    assert.notEqual(await tokenSaleInstance.tokenContract(), 0x0, 'has token contract address');
    assert.equal(await tokenSaleInstance.tokenPrice(), tokenPrice, 'token price is correct');
    assert.equal(await tokenSaleInstance.admin(), admin, 'admin is correct');
  });

  it('facilitates token buying', async function() {
    tokenInstance = await CinoCoin.deployed();
    tokenSaleInstance = await CinoCoinSale.deployed();
    await tokenInstance.transfer(tokenSaleInstance.address, tokensAvailable, { from: admin });

    const numberOfTokens = 10;
    const receipt = await tokenSaleInstance.buyTokens(numberOfTokens, { from: buyer, value: numberOfTokens * tokenPrice });

    truffleAssert.eventEmitted(receipt, 'Sell', (ev) => {
      return ev._buyer === buyer && ev._amount.toNumber() === numberOfTokens;
    });

    const tokensSold = await tokenSaleInstance.tokensSold();
    assert.equal(tokensSold.toNumber(), numberOfTokens, 'increments the number of tokens sold');

    const buyerBalance = await tokenInstance.balanceOf(tokenSaleInstance.address);
    assert.equal(buyerBalance.toNumber(), numberOfTokens);

    const tokenSaleBalance = await tokenInstance.balanceOf(tokenSaleInstance.address);
    assert.equal(tokenSaleBalance.toNumber(), tokensAvailable - numberOfTokens);

    truffleAssert.reverts(
      tokenSaleInstance.buyTokens(numberOfTokens, { from: buyer, value: 1 }),
      null,
      'msg.value must equal number of tokens in wei'
    );

    truffleAssert.reverts(
      tokenSaleInstance.buyTokens(800000, { from: buyer, value: numberOfTokens * tokenPrice }),
      null,
      'connot purchase more tokens than available'
    );
  });

  it('ends token sale', async function () {
    tokenInstance = await CinoCoin.deployed();
    tokenSaleInstance = await CinoCoinSale.deployed();

    truffleAssert.reverts(tokenSaleInstance.endSale({ from: buyer }), null, 'must be admin to end sale');

    await tokenSaleInstance.endSale({ from: admin });

    const adminBalance = await tokenInstance.balanceOf(admin);
    assert.equal(adminBalance.toNumber(), 999990, 'returns all unsold cino coins to admin');

    const tokenPrice = await tokenSaleInstance.tokenPrice();
    assert.equal(tokenPrice.toNumber(), 0, 'token price was reset');
  });
});

The Truffle test encounters an issue: "Error: Trying to execute a transaction that calls a contract function, but the recipient address ___ is not a contract address."

Answer №1

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