Lesson 14: No deployment found for: MockV3Aggregator

[Tosinkoa]

I checked both mocks and dynamicsvg deploy script, they are fine, mockv3aggregator file in contract name too is spelt correctly. But I keep getting an error that says No deployment found for: MockV3Aggregator.

This is the name of the mockv3aggregator file: MockV3Aggregator.sol
And this is the code snippet in mockv3aggregator file:

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;

import "@chainlink/contracts/src/v0.6/tests/MockV3Aggregator.sol";

This is what 00-deploy-mocks.js script looks like.

const { network, ethers } = require("hardhat");
const { developmentChains } = require("../helper-hardhat-config");

const BASE_FEE = "250000000000000000"; // 0.25 is this the premium in LINK?
const GAS_PRICE_LINK = 1e9; // link per gas, is this the gas lane? // 0.000000001 LINK per gas

const DECIMALS = "18";
const INITIAL_PRICE = "200000000000000000000";

module.exports = async ({ getNamedAccounts, deployments }) => {
  const { deploy, log } = deployments;
  const { deployer } = await getNamedAccounts();
  const chainId = network.config.chainId;
  // If we are on a local development network, we need to deploy mocks!

  if (developmentChains.includes(network.name)) {
    log("Local network detected! Deploying mocks...");
    await deploy("VRFCoordinatorV2Mock", {
      from: deployer,
      log: true,
      args: [BASE_FEE, GAS_PRICE_LINK],
    });
    await deploy("MockV3Aggregator", {
      from: deployer,
      log: true,
      args: [DECIMALS, INITIAL_PRICE],
    });

    log("Mocks Deployed!");
    log("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
  }
};
module.exports.tags = ["all", "mocks", "main"];

This is what 03-deploy-dynamic-nft.js script looks like:

const { network, ethers } = require("hardhat");
const { developmentChains, networkConfig } = require("../helper-hardhat-config");
const { verify } = require("../utils/verify");
const fs = require("fs");

module.exports = async ({ getNamedAccounts, deployments }) => {
  const { deploy, log, get } = deployments;
  const { deployer } = await getNamedAccounts();
  const chainId = network.config.chainId;
  let ethUsdPriceFeedAddress;


  if (developmentChains.includes(network.name)) {
        const EthUsdAggregator = await ethers.getContract("MockV3Aggregator");
    ethUsdPriceFeedAddress = EthUsdAggregator.address;
  } else {
    ethUsdPriceFeedAddress = networkConfig[chainId]["ethUsdPriceFeed"];
  }

  const lowSVG = await fs.readFileSync("../images/dynamicNFT/frown.svg", { encoding: "utf8" });
  const highSVG = await fs.readFileSync("../images/dynamicNFT/happy.svg", { encoding: "utf8" });

  log("----------------------------------------------------");
  const args = [ethUsdPriceFeedAddress, lowSVG, highSVG];

  const dynamicSvgNft = await deploy("DynamicSvgNft", {
    from: deployer,
    args: args,
    log: true,
    waitConfirmations: network.config.blockConfirmations || 1,
  });

  if (!developmentChains.includes(network.name) && process.env.ETHERSCAN_API_KEY) {
    await verify(dynamicSvgNft.address, args);
  }
  log("---------------------------------------------------------------");
};

module.exports.tags = ["all", "dynamicsvg", "main"];

I also change this part const EthUsdAggregator = await ethers.getContract("MockV3Aggregator"); to this const EthUsdAggregator = await get("MockV3Aggregator"); in 03-deploy-dynamic-nft.js, it still keep throwing same error.

Thanks in advance for helping me.

[RedArrow-Main]

Hi did you solve the problem

[nebelmeerwanderer1]

@Tosinkoa and @Arslaankhan

Hey. Maybe you have already solved the problem.

If you look in the v0.6. repo (node_modules/@chainlink/contracts/src/v0.6/tests), there is no MockV3Aggregator

A solution is to use the one in v0.7. Import the v0.7 version instead:

import "@chainlink/contracts/src/v0.7/tests/MockV3Aggregator.sol";

Chainlink appears to have changed the setup slightly in v0.8, but v0.7 works for me.

Remember to update hardhat.config compiler information

hope it helps.

[byte14]

It is because you are probably using chainlink v0.4.1, it does not have MockV3Aggregator in v0.8 contracts. You can upgrade chainlink to v0.4.2 and you will get MockV3Aggregator in v0.8.

[chidubesteve]

Make sure that you're compiling your MockV3Aggregator.sol with a compatible solidity version. you could run yarn hardhat deploy or npm hardhat deploy depending on your package mamnger, without the --tags flag. As this can prevent the file from interacting with other files that the MockV3Aggregator.sol. I think

Cheers

[Adelani10]

Checkout #5428

[legendydx]

In the contracts\test\MockV3Aggregator.sol
Make sure to have import "@chainlink/contracts/src/v0.8/tests/MockV3Aggregator.sol";