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GitBook: [hyperlane-xyz#42] No subject
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Jen Aprahamian authored and gitbook-bot committed Jan 25, 2023
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Expand Up @@ -76,7 +76,7 @@ Future changes, like accurately quoted interchain gas payments using token excha

**How do I pay for gas with middlewares, like Interchain Accounts, Interchain Queries, and the Liquidity Layer?**

See our entry on [Middleware APIs](middleware-apis.md) for more details. 
APIs like the [Liquidity Layer API](../token-bridge-api/), the [Accounts API](../send/), and the [Queries API](../query/) are sometimes called "middlewares." Just like all Hyperlane messages that wish to be delivered by a relayer, messages sent via these middlewares must have interchain gas paid for. See our entry on [Middleware APIs](middleware-apis.md) for more details. 

**This may break some of my existing mainnet contracts that are live on v2.**

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