var myContract = web3.eth.contract(abi);
var address = contract address;
var contract_data = myContract.at(address);
var sender = '0xd3aaa525c087978133abb517593ea334f16abd1f';
var receiver = '0xff2b56315dc5372b45dfa3773c4cfd64f70c8e9c';
//transfer is the function in the contract to transfer money from wallet A to B
var getData = contract_data.transfer.getData(receiver,amount);
web3.eth.sendTransaction({to:receiver, from:sender, data: getData});

Source: How to call my contract's function using sendTransaction

When I am tracking the balance, it turns out that only gas price is being deducted from wallet A and nothing else ? But when I use metamask UI to do the transactions, balances are updated successfully. I believe, there is some flaw with the way I am using this api, it'd be really great if anyone could share their experience.


4 Answers 4


You need to pass value in Wei form to sendTransaction method:

web3.sendTransaction({to:receiver, from:sender, value:web3.toWei("0.5", "ether")})

sender account should be unlocked for this to succeed.


to send tokens you need to call


or something among those lines. You don't need to use web3.eth.sendTransaction

  • value is used to send ethers. But I guess OP is asking for transferring tokens (maybe erc-20). Commented Dec 10, 2017 at 6:40
  • I'm guessing he wants to send ethers because he is wondering why only gas is deducted Commented Dec 10, 2017 at 12:17
  • Hey, Thanks a lot. Yes, I intend to transfer tokens. And I need to use the transfer function of my contract to do that. Commented Dec 10, 2017 at 17:31
  • I updated my solution to send tokens Commented Dec 10, 2017 at 19:55
  • 2
    You're missing web3.eth.sendTransaction Commented Oct 14, 2020 at 5:07
//set web3 variable
const web3 = new Web3(window.ethereum);

//get all the accounts
const accounts = await web3.eth.getAccounts();

//if you're using react
this.setState({web3, accounts});

//send the tx using react
this.state.web3.eth.sendTransaction({to: contractAddress, from: this.state.accounts[0], value: ETHamount});

or if you're not using react

web3.eth.sendTransaction({to: address, from: address, value: inWei});

A conversion of wei to eth can be found here. Information on web3 variable setting (it uses infura usually as the endpoint [aka the provider]) can be found here.


If you are using web3.js 1.3.x, this is what worked in my case:

web3.utils.toHex(web3.utils.toWei(amount, 'ether'))

For whichever reason, the below command was sending a wrong value into Metamask.

web3.utils.toWei(amount, 'ether')

With metamask:

  method: 'eth_sendTransaction',
  params: [{
    value: web3.utils.toHex(web3.utils.toWei("0.5")),
.then(() => {
.catch((e) => {

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.