Send ethereum tokens to an empty address
- 13.11.2019
- Samukasa
- 0.00001441 btc
- 5
Even though you can do without it, Truffle significantly reduces the entry barrier to the development, testing, and deployment of Ethereum smart contracts. We totally agree with their statement: Truffle is the most popular development framework for Ethereum with a mission to make your life a whole lot easier. For any questions on writing Ethereum contracts, please refer to the official Solidity smart contract docs. The code described below is from inside the curly brackets. A couple of them are of type uint unsigned integers and a couple are address character long Ethereum addresses.
As the name is exactly the same as our contract name, it is the constructor and gets called only once when the contract is created. Note that if you were to change the name of the contract, this would become a normal function callable by anyone and form a backdoor in your contract like was the case in the Parity Multisig Wallet bug. Additionally, note that the case matters too, so if this function name were in lowercase it would also become a regular function—again, not something you want here.
If someone sends any ETH to this contract, we will happily receive it. To enable any other functions to accept incoming ETH, you can mark them with the payable keyword. It has no function parameters and defines the output tuple to be returned. Note that this. If the require statement is not true, the contract exits with an error.
In the last line, we also fire a Withdrew event. Events are described a bit later. Interestingly, now—which is equivalent to block. It is up to the miner to pick it, so it could be up to 15 minutes seconds off as explained in the following formula : parent. As the contract itself is unaware of any tokens assigned to this address, we must pass in the address of the deployed ERC20 token we want to withdraw.
We also fire a WithdrewTokens event. Triggered events are basically log entries attached to the transaction receipts on the blockchain. Each transaction can attach zero or more log entries. The main uses of events are debugging and monitoring.
Not too bad, huh? The first one is a security concern. Secondly, a factory contract allows easy and effortless TimeLockedWallet contract creation, without the requirement of having any development setup present. In the case of the address type, the default is a zero address 0x We also have an array type, address[], which is holding addresses. In the Solidity language, Arrays always contain one type and can have a fixed or variable length. In our case, the array is unbounded.
To sum up our business logic here, we define a mapping called wallets which consists of user addresses—contract creators and owners alike—each pointing to an array of associated wallet contract addresses. It lets us create a new time-locked wallet on the fly, by calling its constructor: new TimeLockedWallet msg. We then store its address for the creator and the recipient. Later we transfer all the optional ether passed in this function execution to the newly created wallet address.
Finally, we signal the Create event, defined as: event Created address wallet, address from, address to, uint createdAt, uint unlockDate, uint amount ; ToptalToken. To discover different variations of token contracts, feel free to explore the OpenZeppelin repo. Writing artifacts to. Then we simply deploy them. We missed TimeLockedWallet on purpose, as this contract is deployed dynamically. Gas limit: Leave the default value. Nonce: Put the nonce of the transaction that you would like to cancel.
To find that number, go on the stuck transaction's Etherscan page you can click on the transaction in Bridge Wallet's "Activity" tab, then on "View on explorer" , click on "Click to see More", then copy the number under "Nonce". Data: Leave empty. Click "Send". Once that new transaction will have gone through you can check its status in your Activity tab , your previous stuck transaction will be cancelled.
You can then proceed to re-send your initial transaction that got stuck in the first place if you want to , with an adjusted gas price if needed.


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