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Misc DeFi updates for gas, cross-chain swap and missing contracts (#1176)
* Fix typo Add EAS testnet contract addresses * Added some missing testnet entrie Fix nits * Fix link errors * First pass * Fix index * Qualify as EVM * Typo * Added cross-chain swaps and extra FAQ questions * Tidyup * Tidy * Nit * Add multi-sig security options now available * Update docs/ecosystem/defi-liquidity/faq.md * Address feedback * Address feedback * Address feedback * Address feedback
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‎docs/ecosystem/defi-liquidity/cross-chain-swaps.md

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---
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id: cross-chain-swaps
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title: Cross-chain swaps on Flow EVM
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description: An overview of cross-chain options on Flow EVM
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keywords:
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- cross-chain token swap
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- cross-chain bridge
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- intent based bridge
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- liquidity based bridge
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- bridges
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- Flow blockchain
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- Flow EVM
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- EVM
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- Relay.link
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- DeBridge
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- Stargate
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- LayerZero
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- Celer
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sidebar_position: 2
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sidebar_label: Cross-chain swaps on Flow EVM
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---
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import Details from '@theme/Details';
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The following bridges offer cross-chain swaps (token bridging including swap) to or from Flow EVM.
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## Liquidity Pool Based Cross-chain Swaps
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### Stargate
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[Stargate](https://stargate.finance) employs unified liquidity pools shared across multiple chains to enable native asset transfers and cross-chain swaps
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without wrapped tokens. It is built on LayerZero's cross-chain messaging protocol.
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### Celer
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[Celer](https://cbridge.celer.network) is a hybrid liquidity network bridge that combines multiple bridging models and is based on the Celer
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Inter-Chain Messaging Framework.
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## Intent Based Cross-chain Swaps
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Intent based bridges do not depend on pre-funded liquidity pools which can improve user experience, transaction speed and capital efficiency.
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### Relay
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[Relay.link](https://relay.link/bridge/base) allows users to specify desired cross-chain swap outcomes for orders.
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### DeBridge
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[DeBridge](https://app.debridge.finance/) achieves efficient cross-chain swaps with minimal slippage in a decentralized environment
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through a peer-to-peer transaction mechanism.
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‎docs/ecosystem/defi-liquidity/defi-contracts.md

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#### Flow Cadence Testnet
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| Contract Name | Flow Cadence Mainnet Address |
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|-----------------------------------| ---------------------------- |
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| [BandOracle.cdc (Band)][19] | `0x2c71de7af78d1adf` |
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| Contract Name | Flow Cadence Testnet Address |
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|-------------------------------------------|------------------------------|
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| [PublicPriceOracle.cdc (IncrementFi)][31] | `0x8232ce4a3aff4e94` |
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| [BandOracle.cdc (Band)][32] | `0x2c71de7af78d1adf` |
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#### Flow Cadence Mainnet
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| Contract Name | Flow Cadence Mainnet Address |
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|-------------------------------------------| ---------------------------- |
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| [PublicPriceOracle.cdc (IncrementFi)][19] | `0xec67451f8a58216a` |
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| [BandOracle.cdc (Band) Protocol][19] | `0x6801a6222ebf784a` |
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| [BandOracle.cdc (Band) Protocol][33] | `0x6801a6222ebf784a` |
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## Ethereum Attestation Service
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More information can be found on the Credora docs site for [EAS on Flow](https://credora.gitbook.io/eas-for-flow).
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Mainnet EAS Explorer: [https://flow.easscan.credora.io] (https://flow.easscan.credora.io)
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Testnet EAS Explorer: [https://flow-testnet.easscan.credora.io] (https://flow-testnet.easscan.credora.io)
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| Contract Name | Flow EVM Testnet Address |
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|---------------------------------------------------------|----------------------------------------------|
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| [SchemaRegistry.sol (Ethereum Attestation Service)][29] | `0x97900F59828Da4187607Cb8F84f49e3944199d18` |
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| [EAS.sol (Ethereum Attestation Service)][30] | `0xBCF2dA8f82fb032A2474c92Ec5b70C95A83fc0cc` |
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Mainnet EAS Explorer: [https://flow.easscan.credora.io] (https://flow.easscan.credora.io)
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| Contract Name | Flow EVM Mainnet Address |
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| ------------------------------------------------------- | -------------------------------------------- |
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| [SchemaRegistry.sol (Ethereum Attestation Service)][20] | `0xB0cF748a05AEA8D59e15834446CFC95bcFF510F0` |
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[26]: https://contractbrowser.com/A.b78ef7afa52ff906.SwapConfig
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[27]: https://contractbrowser.com/A.a6850776a94e6551.SwapRouter
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[28]: https://evm.flowscan.io/address/0xacC0a0cF13571d30B4b8637996F5D6D774d4fd62?tab=contract
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[29]: https://evm-testnet.flowscan.io/address/0x97900F59828Da4187607Cb8F84f49e3944199d18?tab=contract
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[30]: https://evm-testnet.flowscan.io/address/0xBCF2dA8f82fb032A2474c92Ec5b70C95A83fc0cc?tab=contract
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[31]: https://contractbrowser.com/A.8232ce4a3aff4e94.PublicPriceOracle
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[32]: https://contractbrowser.com/A.2c71de7af78d1adf.BandOracle
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[33]: https://contractbrowser.com/A.6801a6222ebf784a.BandOracle

‎docs/ecosystem/defi-liquidity/faq.md

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- DEX
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- yield farming
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- liquidity
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sidebar_position: 2
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sidebar_position: 3
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sidebar_label: Stablecoins & Bridges FAQ
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---
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Below are common questions regarding stablecoins, liquidity, and bridging on Flow. Click on each question to expand and view the answer.
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## Bridging and Gas
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<Details summary="Does Flow use ETH for gas?">
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No, Flow uses $FLOW as the gas token. [WETH](./defi-contracts#stablecoins--wrapped-assets) is supported on Flow EVM when [bridging](../bridges.md) from another chain. $WFLOW is used as an ERC20 in DeFi apps and not used for gas.
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</Details>
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<Details summary="How do I pay for gas when bridging into Flow?">
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When using Flow EVM for the first time, your EOA will automatically be credited 0.05 FLOW to cover gas costs when bridging into Flow.
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If further top-ups are required you can use [Gas.zip](https://www.gas.zip/). See [Fees](../../evm/fees) for information on gas pricing.
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Flow Wallet users do not pay for gas since the wallet subsidizes all transaction fees.
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</Details>
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## Stablecoins on Flow
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<Details summary="What stablecoins are available on Flow?">
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USDF (USD Flow) - Backed by PYUSD (PayPal USD) issued by PayPal
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</Details>
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<Details summary="What are the smart contract addresses for the stablecoins and bridges on Flow?">
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<Details summary="How can I earn yield on stablecoins on Flow?">
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You can earn yield through:
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- Lending Platforms - Supply stablecoins on [IncrementFi][3] & [MoreMarkets][4] to earn interest.
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- Lending Platforms - Supply stablecoins on [IncrementFi][3], [Sturdy Finance][19] & [MoreMarkets][4] to earn interest.
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- Liquidity Pools - Provide liquidity on [IncrementFi][5] or [KittyPunch][6] to earn trading fees and farm LP tokens.
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- Yield Aggregators (Coming soon) - Use [KittyPunch][7] to automate stablecoin yield strategies.
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</Details>
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[15]: https://discord.gg/flow
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[16]: https://evm.flowscan.io
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[17]: https://discord.com/invite/9sFqx9U
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[19]: https://v2.sturdy.finance/overview
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[20]: https://www.flowverse.co/?categories=defi

‎docs/ecosystem/defi-liquidity/index.md

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**Start integrating DeFi on Flow today.**
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**[DeFi Contacts](./defi-contracts.md)**
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**[DeFi Contracts](./defi-contracts.md)**
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**[Cross-chain swaps](./cross-chain-swaps.md)**
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**[Read the FAQ](./faq.md)**
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Explore the [FlowVerse DeFi ecosystem](https://www.flowverse.co/?categories=defi) page for more information.
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## Securing DeFi on Flow EVM
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Flow EVM supports secure multi-sig from Safe.Global (formerly Gnosis Safe) or Fireblocks. Both offer robust solutions for
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developers seeking to enhance the security and management of tokenized assets with a focus on institutional-grade practices and scalability.
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* [Safe.Global](https://safe.flow.com/)
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* [Fireblocks](https://www.fireblocks.com/)
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‎docs/evm/cross-chain-bridges.mdx

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# Cross-hain Bridges
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# Cross-chain Bridges
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Go to [Bridges](../ecosystem/bridges.md)
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