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There's no way to destroy contracts in general. They can be set to self destruct if such functionality is codes in then but this is quite rare. Normally old contracts just stay where they are and people just stop using them. If you issue the same deploy command again you will get a new contract at a new address. There's no harm in doing it this way. Except ...


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You could just deploy an ERC20 token with a name of Tether, then call the mint function to populate your wallet with tokens and pretend this is Tether for testing purposes. Here's an example: pragma solidity 0.5.7; pragma experimental ABIEncoderV2; import { ERC20 } from "openzeppelin-solidity/contracts/token/ERC20/ERC20.sol"; contract MockTether is ERC20 {...


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You can simply deploy them as separate contracts. On the "DEPLOY & RUN TRANSACTIONS" section of Remix, you can choose which contract you want to deploy, even if they are in the same file. When you have chosen your contract, simply hit "Deploy" on that same page. You can choose your network by specifying the "Environment" (on that same page) and ...


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Ropsten transactions are confirmed by miners on that POW network. Rinkeby transactions are confirmed by specific authorized nodes run by the the Geth team. The Ethereum Foundation, Infura, AKASHA and others might also be involved. Non-validator nodes are run by others in the ethereum space such as PegaSys, Funfair, etc. You can see the list of Rinkeby ...


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I think it is 43 GB as of December 26. (but don't nail me on that) If you buy a VPS you should definitely buy one that exceeds this number with easy. (or upgrade capacity later on)


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