Unable to call function from smart contract using web3.js

Question

I am trying to call a function from my smart contract using web3 and react. Here is my code.

app.js const project=new web3.eth.Contract(Mycontractabi.abi,networkData.address); const retailer=await project.getretailer.call(); console.log(retailer); contract: address public retailer function getretailer() public view returns (address) { return retailer; }

Kindly point out what is wrong as I am not able to get retailer address as desired by the code

maybe instead of this Mycontractabi.abi, just Mycontractabi. console,log(project) see what you are getting — Yilmaz
– Yilmaz, Commented Sep 24, 2022 at 16:47

Ruyafatima Sakharkar · Accepted Answer · 2022-09-25 16:12:18Z

I found that to access a variable from a smart contract using web3.js there is simple method:

contract.methods.variable_name.call().call();

So in my case, the modified code will be :

const project=new web3.eth.Contract(Mycontractabi.abi,networkData.address); const retailer=await project.methods.retailer.call().call();

There is no need to call any function just to access a single variable. We can access any variable directly by using above method.

small remark: the first parameter is address, abi is the second.

Liki Crus · Accepted Answer · 2022-09-29 14:45:10Z

You can call a function like the following.

const retailer = await project.methods.retailer().call();

If a method has some parameters, you can use:

const response = await project.methods.myAnotherMethod(param1, param2).send({from: address});

address is the current connected wallet address.

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