To answer the first part of your first question:
Are all ERC-20 token transfers are listed with the "0xddf252..." sha3 hash, and would the below code suffice for accurately capturing those transfers?
As far as I know, the ERC20 standard dictates the prototype of the transfer function, but it doesn't dictate the prototype of the Transfer event (or even the fact that this function should emit an event to begin with).
I might be wrong here, as evidently, OpenZeppelin have declared this event in their IERC20 interface:
event Transfer(address indexed from, address indexed to, uint256 value);
In either case, even if this event is not part of the ERC20 standard, it is widely acceptable to rely on it being emitted as a result of ERC20-token transfer operations.
A technical suggestion:
If you're using web3.js v1.x, then I recommend that you use this instead of that hard-coded value:
const tokenTransferHash = Web3.utils.keccak256("Transfer(address,address,uint256)");
Of course, you can initialize it once (i.e., in global scope, outside of any function).
To answer the second part of your first question:
Is there a separate function for new tokens minted, or is it safe to assume all newly minted tokens come from the '0x000000...' address?
The ERC20 standard does not state that a mint function should be implemented to begin with.
So any ERC20-token contract which implements this function, is in fact extending the standard.
That said, it is widely acceptable that mint functions emit a Transfer event with the source address being zero, and that burn functions (also not part of the standard) emit a Transfer event with the target address being zero.
Of course, you should not rely on this fact without verifying it in the implementation of the contract that you're targeting.
Best Answer
When you click on the link you end up on the site where all state-changing methods are shown. It shows me the
Connect to web3button.Click on it and use the wallet you are using. You need to have the private key for the following address:
0xe0cc4d92a460af4aa6a5b936a2ec21a036070901Go to the withdraw method, enter the amount of Ether you want to withdraw and your wallet should ask to sign a transaction.
Once you did that, you should get the ether, as soon the transaction is mined.