eth_call

Call contract, returning the output data

web3.eth.call(callObject [, defaultBlock] [, callback])

Parameters

1. A transaction object, see web3.eth.sendTransaction. For calls the from property is optional however it is highly recommended to explicitly set it or it may default to address(0) depending on your node or provider.

2. (optional) If you pass this parameter it will not use the default block set with web3.eth.defaultBlock. Pre-defined block numbers as "earliest", "latest" and "pending" can also be used.

3. (optional) Optional callback, returns an error object as first parameter and the result as second.

Returns

The returned data of the call, e.g. a smart contract functions return value.

Example

const abi = JSON.parse('[{\"inputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"constant\":true,\"inputs\":[],\"name\":\"get\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"string\",\"name\":\"_value\",\"type\":\"string\"}],\"name\":\"set\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]')
bytecode = '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'
const contract = new web3.eth.Contract(abi)
const transaction = contract.deploy({data: bytecode})
web3.eth.call({
  to : account1,
  data : transaction.encodeABI()
}, function(error, result) {
  if(!error){
    console.log(result)
  }else{
    console.log(error)
  }
});
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