# Ethereum L2 Cheatsheet By [ethmaxitard.eth](https://paragraph.com/@ethmaxitar) · 2021-12-11 --- ### Contents * Direct fiat-to-L2 onboarding * L2 bridges * L2 compatible wallets * L2 dApps * App-specific rollups * More info ### Direct fiat-to-L2 onboarding [coinbase.com](http://coinbase.com) has integrated with Arbitrum and Optimism [kraken.com](https://kraken.com) has integrated with Arbitrum [crypto.com](http://crypto.com) has integrated with Arbitrum [binance.com](https://binance.com) has integrated with Arbitrum [kucoin.com](https://kucoin.com) has integrated with Arbitrum [huobi.ma](https://www.huobi.ma/en-us/) has integrated with Arbitrum and Optimism [bybit.com](https://www.bybit.com/) has integrated with Arbitrum and zkSync [argent.xyz](https://www.argent.xyz/) has integrated with zkSync [layerswap.io](http://layerswap.io) \[Coinbase, Binance, Huobi, Okex, Kucoin\] → \[Arbitrum, Optimism, zkSync, Boba\] [go.ramp.network/zkSync](https://go.ramp.network/zkSync) direct fiat to zkSync [global.transak.com](https://twitter.com/transak_finance/status/1473370773221949446?s=20) direct fiat to Arbitrum and Optimism (not yet available in the US) [zksync.banxa.com](https://zksync.banxa.com), [arbitrum.banxa.com](https://arbitrum.banxa.com), [optimism.banxa.com](https://optimism.banxa.com) direct fiat to zkSync, Arbitrum, Optimism (not yet available in the US) ### L2 bridges [hop.exchange](https://hop.exchange) \[mainnet, Arbitrum, Optimism\] → \[mainnet, Arbitrum, Optimism\] [xpollinate.io](https://xpollinate.io/) \[mainnet, Arbitrum, Optimism\] → \[mainnet, Arbitrum, Optimism\] [cbridge.celer.network/#/transfer](https://cbridge.celer.network/#/transfer) \[mainnet, Arbitrum, Optimism, Boba\] → \[mainnet, Arbitrum, Optimism, Boba\] "[gas on arrival](https://mobile.twitter.com/CelerNetwork/status/1471965399570812928)" feature - you will always receive some gas tokens when your asset arrives on the other chain. [synapseprotocol.com](https://synapseprotocol.com/) \[mainnet, Arbitrum, Optimism, Boba\] → \[mainnet, Arbitrum, Optimism, Boba\] [anyswap.exchange](https://anyswap.exchange) \[mainnet, Arbitrum, Boba\] → \[mainnet, Arbitrum, Boba\] [mosaic.composable.finance](https://mosaic.composable.finance) \[mainnet, Arbitrum\] → \[mainnet, Arbitrum\] [app.orbiter.finance](https://app.orbiter.finance) \[mainnet, Arbitrum, zkSync\] → \[mainnet, Arbitrum, zkSync\] Only USDC is supported. [across.to](https://across.to) \[Arbitrum, Optimism\] → mainnet [portr.xyz](http://Portr.xyz) mainnet → Optimism [li.finance](https://li.finance) \[mainnet, Arbitrum, Optimism\] → \[mainnet, Arbitrum, Optimism\] [app.fund.movr.network](https://app.fund.movr.network/?fromChainId=1&toChainId=42161) \[mainnet, Arbitrum, Optimism\] → \[mainnet, Arbitrum, Optimism\] These two projects cross L2s _and_ swap for other tokens, so you can exchange ETH on mainnet for DAI on Optimism; it’ll find the cheapest route for you. ### L2 compatible wallets [Metamask](https://metamask.io/) - Arbitrum, Optimism [Coinbase Wallet](https://www.coinbase.com/wallet) - Arbitrum, Optimism [Argent](https://www.argent.xyz/) - zkSync [Argent X](https://www.argent.xyz/argent-x/) - StarkNet [Rainbow](https://learn.rainbow.me/a-beginners-guide-to-layer-2-networks) - Arbitrum, Optimism [Frame](https://frame.sh) - Arbitrum, Optimism [zkSync](http://wallet.zksync.io) - zkSync [Numio](https://www.numio.one/) - zkSync [imToken](https://token.im/) - zkSync, Arbitrum [Trust Wallet](https://trustwallet.com/) - Arbitrum [Coin98](https://wallet.coin98.com/) - Arbitrum ### L2 dApps Arbitrum - [portal.arbitrum.one](https://portal.arbitrum.one) Optimism - [optimism.io/apps/all](https://optimism.io/apps/all) zkSync - [zksync.community/t/links-to-applications-making-use-of-zksync/15](https://www.zksync.community/t/links-to-applications-making-use-of-zksync/15) You can also donate to projects on Gitcoin via zkSync. You can also use [Argent](https://www.argent.xyz/) to buy, earn, stake, and trade on zkSync. StarkNet - [starknet-ecosystem.com](https://www.starknet-ecosystem.com/) Boba - [boba.network/ecosystem](https://boba.network/ecosystem/) (scroll down) Another way to see available dApps is to go to [DeFi Llama](https://defillama.com/) and filter by the L2 you’re interested in. This may not include the newest dApps, but you can see the TVL in the most popular ones. For DAOs, the most popular DAO tool [Gnosis Safe](https://gnosis-safe.io/) supports Arbitrum. ### App-specific rollups These are specialized layer 2 rollups that do not support general purpose smart contracts. dYdX - [dydx.exchange](https://dydx.exchange) Loopring - [loopring.org](https://loopring.org) (L2 wallet and direct fiat onramp [available now](https://medium.loopring.io/introducing-l2-counterfactual-wallet-and-fiat-on-ramps-a4b60edf15d6)) ZKSwap - [zks.org](https://zks.org) ImmutableX - [immutable.com](https://immutable.com) Deversifi - [deversifi.com](http://deversifi.com) Sorare - [sorare.com](https://sorare.com) Aztec - [aztec.network](https://aztec.network) ### More info A rollup-centric ethereum roadmap, by Vitalik Buterin [ethereum-magicians.org/t/a-rollup-centric-ethereum-roadmap/4698](https://ethereum-magicians.org/t/a-rollup-centric-ethereum-roadmap/4698) Writings of [@epolynya](https://twitter.com/epolynya), who pushed the concept of modular blockchains into the mainstream [polynya.medium.com](https://polynya.medium.com) Comparisons between L2s (TVL, types of risks) [l2beat.com](https://l2beat.com) L2 fees [l2fees.info](https://l2fees.info) The ultimate guide to L2s on Ethereum, by [@DCbuild3r](https://twitter.com/DCbuild3r) [mirror.xyz/dcbuilder.eth/QX\_ELJBQBm1Iq45ktPsz8pWLZN1C52DmEtH09boZuo0](https://mirror.xyz/dcbuilder.eth/QX_ELJBQBm1Iq45ktPsz8pWLZN1C52DmEtH09boZuo0) The Grand Design, by [@sassal0x](https://twitter.com/sassal0x) [thedailygwei.substack.com/p/the-grand-design-the-daily-gwei-335](https://thedailygwei.substack.com/p/the-grand-design-the-daily-gwei-335) Fractal Scaling: From L2 to L3, by StarkWare [medium.com/starkware/fractal-scaling-from-l2-to-l3-7fe238ecfb4f](https://medium.com/starkware/fractal-scaling-from-l2-to-l3-7fe238ecfb4f) * * * I only included live L2s - will update as more L2s go live. Please reach out to [@ethmaxitard](https://twitter.com/ethmaxitard) if you have any suggestions. (I threw this together at the [@CodelessCon](https://twitter.com/CodelessCon) codeless web3 hackathon!) --- *Originally published on [ethmaxitard.eth](https://paragraph.com/@ethmaxitar/ethereum-l2-cheatsheet)*