How do I withdraw the balance from a contract on Ethereum test blockchain

Question

I am using Ganache (TestRPC) for my local blockchain with its default test accounts having 100 ETH balance, connected with Metamask.

I am creating a Withdrawal Contract according to the following documentation: http://solidity.readthedocs.io/en/develop/common-patterns.html using 10 ETH.

Contract is being executed successfully, but when I execute the withdraw() that should refund me the 10ETH amount. 

Metamask shows transaction as success.

But the amount never makes it to my test account. Account balance is still 90ETH.

Answer 1

Your need to improvise your code a bit. You gotta deploy the contract without sending any ether. Then call becomeRichest(), this time sending in the ether. Then use withdraw.

withdraw() uses the pendingWithdrawalsmapping to determine how much the caller is allowed to transfer out of the contract. Only the becomeRichest() method is setting that mapping. The constructor is not.