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I deployed the smart contract into a test network. so if a new user is added to the test network and he wants to use my smart contract functions. How to call those functions by the new user in the test network

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  • What did you try?
    – sharif2008
    Jul 17, 2018 at 7:02

1 Answer 1

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Using web3.js v1, you can do something like this:

let fs = require("fs");
let Web3 = require("web3");

async function run() {
    let web3 = new Web3(YOUR_ETHEREUM_NODE_ADDRESS);

    let abi = fs.readFileSync("YourContract.abi").toString();
    let contract = new web3.eth.Contract(JSON.parse(abi), YOUR_DEPLOYED_CONTRACT_ADDRESS);

    let transaction = contract.methods.yourMethod(yourArguments);

    let options = {
        to  : transaction._parent._address,
        data: transaction.encodeABI(),
        gas : await transaction.estimateGas({from: YOUR_PUBLIC_KEY}),
    };

    let signedTransaction = await web3.eth.accounts.signTransaction(options, YOUR_PRIVATE_KEY);
    let transactionReceipt = await web3.eth.sendSignedTransaction(signedTransaction.rawTransaction);

    return transactionReceipt;
}
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  • where should I use this because I am using geth console. Is it possible to call the functions from geth console by other nodes in the network?
    – vijju
    Jul 17, 2018 at 7:32
  • You can run it on your machine with NodeJS as a separate process (i.e., put it in myScript.js and call node myScript.js). Jul 17, 2018 at 11:38

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