Exchange Listing Resource

web3.eth.personal.newAccount(password, [callback])

Parameters

password - String: The password to encrypt this account with.

Returns

Promise returns String: The address of the newly created account.

Example

web3.eth.personal.newAccount('!@superpassword')
.then(console.log);
> '0x1234567891011121314151617181920212223456'

web3.eth.accounts.create([entropy]);

Parameters

entropy - String (optional): A random string to increase entropy. If given it should be at least 32 characters. If none is given a random string will be generated using random hex.

Returns

Object - The account object with the following structure:

• address - string : The account address.
• privateKey - string : The accounts private key. This should never be shared or stored unencrypted in localstorage! Also make sure to null the memory after usage.
• signTransaction(tx [, callback]) - Function : The function to sign transactions. See web3.eth.accounts.signTransaction() for more.
• sign(data) - Function : The function to sign transactions. See web3.eth.accounts.sign() for more.

Example

web3.eth.accounts.create();
> {
    address: "0xb8CE9ab6943e0eCED004cDe8e3bBed6568B2Fa01",
    privateKey: "0x348ce564d427a3311b6536bbcff9390d69395b06ed6c486954e971d960fe8709",
    signTransaction: function(tx){...},
    sign: function(data){...},
    encrypt: function(password){...}
}

Parameters

• string - A block number or hash. Or the string "genesis", "latest" or "pending" as in the default block parameter.
• Number - The transactions index position.
• Function - (optional) Optional callback, returns an error object as first parameter and the result as second.
• sign(data) - Function : The function to sign transactions. See web3.eth.accounts.sign() for more.

Returns

Promise returns Object - A transaction object.

Example

var transaction = web3.eth.getTransactionFromBlock('0x4534534534', 2)
.then(console.log);
> > {
    "hash": "0x9fc76417374aa880d4449a1f7f31ec597f00b1f6f3dd2d66f4c9c6c445836d8b",
    "nonce": 2,
    "blockHash": "0xef95f2f1ed3ca60b048b4bf67cde2195961e0bba6f70bcbea9a2c4e133e34b46",
    "blockNumber": 3,
    "transactionIndex": 0,
    "from": "0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b",
    "to": "0x6295ee1b4f6dd65047762f924ecd367c17eabf8f",
    "value": '123450000000000000',
    "gas": 314159,
    "gasPrice": '2000000000000',
    "input": "0x57cb2fc4"
}

Parameters

1. Object - The transaction object to send:

• from - String|Number : The address for the sending account. Uses the web3.eth.defaultAccount property, if not specified. Or an address or index of a local wallet in web3.eth.accounts.wallet.
• to - String : (optional) The destination address of the message, left undefined for a contract-creation transaction.
• value - Number|String|BN|BigNumber : (optional) The value transferred for the transaction in wei, also the endowment if it's a contract-creation transaction.
• gas - Number : (optional, default: To-Be-Determined) The amount of gas to use for the transaction (unused gas is refunded).
• gasPrice - Number|String|BN|BigNumber : (optional) The price of gas for this transaction in wei, defaults to web3.eth.gasPrice.
• data - String : (optional) Either a ABI byte string containing the data of the function call on a contract, or in the case of a contract-creation transaction the initialisation code.
• nonce - Number : (optional) Integer of a nonce. This allows to overwrite your own pending transactions that use the same nonce.

2. callback - Function : (optional) Optional callback, returns an error object as first parameter and the result as second.

Returns

The callback will return the 32 bytes transaction hash.

PromiEvent : A promise combined event emitter. Will be resolved when the transaction receipt is available. Additionally the following events are available:

• "transactionHash" returns String : Is fired right after the transaction is sent and a transaction hash is available.
• "receipt" returns object : Is fired when the transaction receipt is available.
• "confirmation" returns Number, Object : Is fired for every confirmation up to the 12th confirmation. Receives the confirmation number as the first and the receipt as the second argument. Fired from confirmation 0 on, which is the block where its minded.
• "error" returns Error : Is fired if an error occurs during sending. If a out of gas error, the second parameter is the receipt.

Example

// compiled solidity source code using https://remix.ethereum.org
var code = "603d80600c6000396000f3007c01000000000000000000000000000000000000000000000000000000006000350463c6888fa18114602d57005b6007600435028060005260206000f3";
// using the callback
web3.eth.sendTransaction({
    from: '0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe',
    data: code // deploying a contracrt
}, function(error, hash){
    ...
});
// using the promise
web3.eth.sendTransaction({
    from: '0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe',
    to: '0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe',
    value: '1000000000000000'
})
.then(function(receipt){
    ...
});
// using the event emitter
web3.eth.sendTransaction({
    from: '0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe',
    to: '0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe',
    value: '1000000000000000'
})
.on('transactionHash', function(hash){
    ...
})
.on('receipt', function(receipt){
    ...
})
.on('confirmation', function(confirmationNumber, receipt){ ... })
.on('error', console.error); // If a out of gas error, the second parameter is the receipt.