Lesson 6: Hardhat Gas Reporter-Price data missing from report

[zjy-1998]

I have installed and added the hardhat-gas-reporter to the hardhat.config.js, and set the environment variable COINMARKETCAP_API_KEY properly. After running yarn hardhat test in the terminal, the output file gas-report.txt didn't show the gas price. I check my api key in coinmarketcap, it didn't got hit even once. It seems a network problem, but I can call the API of etherscan programmatically. I really can't figure it out why the API of coinmarketcap didn't work.

Here is what my gas report looks like:

Here is my configuration of the gasReporter:

    gasReporter: {
        enabled: true,
        outputFile: "gas-report.txt",
        noColors: true,
        coinmarketcap: COINMARKETCAP_API_KEY,
        currency: "USD",
        token: "MATIC",
    },

[alymurtazamemon]

@zjy-1998 console.log this COINMARKETCAP_API_KEY in the hardhat file and make sure it is not undefined there, and if it is not undefined then try to specify here like this;

gasReporter: {
    enabled: true,
    outputFile: "gas-report.txt",
    noColors: true,
    coinmarketcap: process.env.COINMARKETCAP_API_KEY,
    currency: "USD",
    token: "MATIC",
},

If still, you don't see the price then try it the next day or after some time, because sometimes etherscan and coinmarketcap do these fetching issues.

[alymurtazamemon]

@zjy-1998 No, coinmarketcap API is working fine and there is no issue going on for fetching, the issue is on your end, push it to Github and leave a here so we will check it.

[zjy-1998]

@alymurtazamemon https://github.com/zjy-1998/hardhat-simple-storage-fcc
note:
I have just switched the code to type script, but the problem of coinmarketcap API is still there.
I use proxy and also met some network problem in using etherscan API before, but I have solved the etherscan API problem with adding some code in hardhat.config.ts file like this:

// Network
const { ProxyAgent, setGlobalDispatcher } = require("undici")
const proxyAgent = new ProxyAgent("http://127.0.0.1:7890") // change to mine
setGlobalDispatcher(proxyAgent)

And I also met some network problem in using ternimal, which also solved by using the command line like this:
git config --global --add remote.origin.proxy "127.0.0.1:7890"

[alymurtazamemon]

@zjy-1998 let me check it.

[alymurtazamemon]

@zjy-1998 For me it is work, you should recreate your API key

here it is

[zjy-1998]

@alymurtazamemon Thanks for your check!
I recreated my API key and put it in my code, still didn't work. I think it is more likely caused by my network...

[krakxn]

Push to GitHub; I will look into it with my "settings" so as to diagnose the logic--once debugged, the issue will be limited to your .env (or dependencies).

[krakxn]

@zjy-1998 I made a PR fixing run(); please check the reply there (as there is a mistake from my end).

[zjy-1998]

@krakxn Thanks but problem still after modifying.
I have tried another coinmarketcap API and as the same. I think it is more likely caused by my network since my code ran on others network worked out with price data as above reply.

[krakxn]

@zjy-1998

The terminal on running yarn hardhat test:

The gas-report .txt file:

So, it can be deduced that the logic of your code is correct and does not need any debugging.

Follow this process:

• Delete node_modules manually
• yarn hardhat clean
• yarn install
• Then, make sure you have the following in your .env file

• Now, run yarn hardhat compile
• yarn hardhat test

The problem should certainly be fixed now.

If it still has not, regenerate new keys for each of the providers which you are using--this is the only possible problem after all this.

[zjy-1998]

@krakxn
I almost tried all methods but the problem is still there. Because of the local regulation, I always met these network problems.
Anyway, sincerely thank you!

[krakxn]

Sad :(

Good luck!

[wendy556]

Are you in China using VPN? I encounter the same issue currently and I think it is the VPN's problem. May I ask if you have found any way to solve this issue now?

[wang-junxi]

Hi bro, I am in China using VPN and I meet the same trouble with you.Have you made any progress?

@zjy-1998 Dear bro, did you find a solution? I think this feature gas-report is quite important.

[wang-junxi]

@zjy-1998 @wendy556 Hi guys, I just found the solution. It's very exciting!

The wrong VPN settings prevented our terminal from pinging through the api address of coinmarketcap, and we couldn't even ping through google.com in our terminal (try it and see).

When I opened this setting 'TUN Mode' in the VPN GUI, a new world opened up. I was able to ping through all the overseas domains, and even execute yarn hardhat test much faster!

[leleleocc]

@zjy-1998 @wendy556 Hi guys, I just found the solution. It's very exciting!

The wrong VPN settings prevented our terminal from pinging through the api address of coinmarketcap, and we couldn't even ping through google.com in our terminal (try it and see).

When I opened this setting 'TUN Mode' in the VPN GUI, a new world opened up. I was able to ping through all the overseas domains, and even execute yarn hardhat test much faster!

it works for me,but why calling the coinmartket's api needs to ping the domain?

[leleleocc]

yeah,I see.TUN Mode of clash enables vscode to connect the domain that it should not have access to.
Thanks!!