[SOLVED] How to interact with variables of smart contract

Moralis General
#1

Can anyone help me that how we can interact with variables that are set public in smart contact using Moralis.

#2

You could try to query the smart contract for those variables if the contract has functions that returns that info.

#3

you can try to use Moralis.executeFunction

https://docs.moralis.io/moralis-dapp/web3/web3#executefunction

you will need to know the ABI for that contract in order to know what functions to call

#4

bro by using executefunction we can only interact with the functions of smart contract? Isn’t it. But i am trying to interact with the variables of smart contract. Hope you understand!

#5

can you share me the documentation which you are talking about?

#6

You need to call it as read function as shown in this doc
https://docs.moralis.io/moralis-dapp/web3/web3#executefunction

Inplace of the function name, it will be the public variable name.
This is an example, where I am reading the public variable named data.

const options = {
  contractAddress: "0x36d53FB0c43a124a7b0f4a23E80C1a3980E67dCB",
  functionName: "data",
  abi: [
	{
		"inputs": [],
		"name": "data",
		"outputs": [
			{
				"internalType": "string",
				"name": "",
				"type": "string"
			}
		],
		"stateMutability": "view",
		"type": "function"
	}
],
};
const transaction = await Moralis.executeFunction(options);
console.log(transaction)
#7

^As an example, the following uses the wETH contract to get its public name variable of “Wrapped Ether”:

const readOptions = {
  contractAddress: '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2',
  functionName: 'name',
  abi: ABI,
};

const message = await Moralis.executeFunction(readOptions);
console.log(message);

You can also use the runContractFunction API.

#8

Thank you bro it works. Thanks a lot.

#9

just to know, this is a call i need to replicate for each public variable on the contract?

#10

Yes, you have to call it for every variable and update it for every public variable

#11

great! thanks for the answer. just one more… can i trust on V1 apis? or they are going to be deprecated?

#12

what do you mean with v1 apis? in this case it is a call that uses current wallet like metamask with Moralis.executeFunction