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  1. Technical Documentation
  2. Web3 compatibility

eth_call

Call contract, returning the output data

Previouseth_sendSignedTransactionNexteth_estimateGas

Last updated 4 years ago

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

Parameters

  1. A transaction object, see . 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 . 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)
  }
});
> 0x
web3.eth.sendTransaction
web3.eth.defaultBlock