I just deployed a contract and wants to access it using web3 to read and write data.

I have web3 working, passed the contract Address and ABI and I can access the contract and Read Data using:


This returns the correct value from the contract.

However, If i want to write something using send() like:

contract.methods.setTestString("Test").send( {from: account }, function(error, transactionHash){ alert(error); });

I get the error "Method not found". But the method is there and it is also public available.

Any ideas?


  • we need more information, like web3 version, using ganache , truffle?
    – Majd TL
    Mar 25, 2021 at 13:55

1 Answer 1


This code is working for my sets:

        async function setAnString() {
            var varSetAnString = await contract.methods.setAnString( "As you want" ).send()
            .then((result) => {
                    console.log("Success! Got result: " + result);
                    console.log("The value setted: "+varSetAnString);
                    let tmp = JSON.stringify(result,null,1); console.log("result::"+ tmp);
                }).catch((err) => {
                    console.log("Failed with error: " + err);

Be careful with the ABI. Maybe you need to update. Hope it helps.


I previously declare the contract and from address in external options:

const contract = new web3js.eth.Contract(abi);

contract.options.from = '0x0.......';
contract.options.address = '0x0.......'; //Contract address

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