That said, even when travelling through wormholes, you've got to do it right: make sure you use the right bridges and portals. MetaMask isn't just a wallet, and it isn't just your gateway to the Ethereum network it's your passport to the decentralized multichain multiverse. So that ends up meaning that MetaMask will work just the same on a new network as it does on Ethereum mainnet. To put it another way, most people building networks want to make sure that their networks are compatible with Ethereum. Why? Simply put, because Ethereum has served as a roadmap and a standard-creating paradigm for blockchain networks. And here's the really incredible part - you can use MetaMask on any Ethereum-compatible network, with any Ethereum-compatible token, following the same process. Instead, MetaMask keeps a list of the most popular tokens, and automatically detects those but no worries, if you get one that's less common, you can easily add it manually. MetaMask doesn't automatically catalog and load every possible token into a list just in case you buy some of them - at time of writing, there are nearly 650,000 different ERC-20 contracts out there. You wait for the swap to settle, and there in your MetaMask wallet, your tokens appear. Let's say you're on Ethereum mainnet, and you just bought yourself a few tokens of a widely-recognized and traded token. So, your BNB, USDT, LINK, DAI tokens, to name a few, are ERC-20 tokens. On the Ethereum network, many fungible tokens conform to a standard called ERC-20. Fungible token standards ERC-20 TokensĪs blockchain networks have developed, standards have been put in place as to how tokens should be programmed how they act, programmatically speaking. The network currency tokens, described above, are an example of fungible tokens. True, on most networks they're more traceable than a paper banknote - remember, there's a ledger of what tokens go where - but they're intended to be used as a medium of exchange for one purpose or another. They are interchangeable, just like a metallic coin or a paper bill of currency. Sometimes network-native tokens have significant differences from other tokens on the network (more on the quirks of ETH below), but in general, they're what we call fungible tokens: Fungible tokensįungible tokens are those which are not unique. This is important for the user because unless they hold some amount of the network's native currency, they may not be able to pay for transactions, gas fees, etc. Ethereum mainnet uses ETH for this purpose, but each network will have its own standard. Most blockchain networks, be they fully public or otherwise, utilize some sort of incentivized consensus mechanism to pay for the computing power of the network, and generally there is a default token, or "native currency", that the network uses for those payments. How do we track those assets? Well, they need to be quantified in some way: enter tokens. ![]() ![]() For this reason it's also called distributed ledger technology: in the end, it's all a series of ledgers being synced across the network. One of the most basic features of blockchain technology is the ability to track assets moving between parties. With that in mind, this article will seek to give an explanation regarding tokens that acknowledges this multi-chain reality, especially given how much activity happens on non-mainnet chains through MetaMask. This means it can be used on any Ethereum-compatible blockchain network - and there are a lot of those. ![]() It's true, that's where a lot of the most popular applications are, and as the network scales, that should continue to be the case, but from the beginning, MetaMask has been designed to be open and modifiable to the world. ![]() It is important to remember that MetaMask isn't just used on the Ethereum mainnet. If you're new to blockchains and the decentralized web, take a read through our primer the concepts outlined there will form the basis for the following discussion.
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