How to retrieve the Contract account balance in web3 or in geth command line?

Question

I have created a private network with miner node using Ethereum. Then I deployed an Ethereum smart contract in the network. I have got the contract address as "0x045bfe22453a9ca06aff4bdc5d7f5870eba121bd"

Now from my eth.coinbase I would like to transfer some ethers to the contract account.

After unlocking the account, I used the code

  eth.sendTransaction({from:eth.coinbase,to:"0x045bfe22453a9ca06aff4bdc5d7f5870eba121bd",value:web3.toWei(3,"ether"),gas:'1000000'});

After doing this, I have checked for eth.pendingtransactions, those got mined and added to blocks.

I debugged the transactionReceipt, could not able to get the data anything.

How to get the balance in contract account?

Answer 1

To check the balance you can do:

web3.eth.getBalance(contract.options.address)

Or:

web3.eth.getBalance("0x045bfe22453a9ca06aff4bdc5d7f5870eba121bd")

To transfer balance on a contract without calling a function the contract must have a payable fallback function.

http://solidity.readthedocs.io/en/develop/contracts.html#fallback-function

Answer 2

If you're using newer versions of solidity to compile your contract, you need to ensure your fallback function is defined, and has the payable modifier:

contract IsPayable {
  function () payable {}
}

Answer 3

The contract probably has a fallback function that generates an exception or uses more than 1000000 gas (which would itself cause an exception).The fallback function goes by:

function( ) {throw;}

You can check this by using following code snippet:

var status= debug.traceTransaction("your_transaction_hash);
if (status.structLogs.length > 0) {
  console.log(status.structLogs[status.structLogs.length-1].error)
}

And if you output as:

"invalid jump destination (PUSH1) 2"

Then your code throws.

What could be the way to get the balance in contract account. If you are comfortable using geth use :

eth.getBalance("0x045bfe22453a9ca06aff4bdc5d7f5870eba121bd")

Or you can also see your contract balance in Mist for that you have to watch the contract.
Solution:
From comments section :
Add payable modifier to the fallback function to allow contract to recieve ethers. You need to add payable modifier to any function that seeks to recieve ethers.