# Relayer SDK

**Welcome to the Relayer SDK Docs.**

This section provides an overview of the key features of Zama’s FHEVM Relayer JavaScript SDK. The SDK lets you interact with FHEVM smart contracts without dealing directly with the [Gateway Chain](https://docs.zama.ai/protocol/protocol/overview/gateway).

With the Relayer, FHEVM clients only need a wallet on the FHEVM host chain. All interactions with the Gateway chain are handled through HTTP calls to Zama's Relayer, which pays for it on the Gateway chain.

## Where to go next

If you’re new to the Zama Protocol, start with the [Litepaper](https://docs.zama.ai/protocol/zama-protocol-litepaper) or the [Protocol Overview](https://docs.zama.ai/protocol) to understand the foundations.

Otherwise:

🟨 Go to [**Setup guide**](/protocol/solidity-guides/v0.10/docs/sdk-guides/initialization.md) to learn how to configure the Relayer SDK for your project.

🟨 Go to [**Input registration**](/protocol/solidity-guides/v0.10/docs/sdk-guides/input.md) to see how to register new encrypted inputs for your smart contracts.

🟨 Go to [**User decryption**](/protocol/solidity-guides/v0.10/docs/sdk-guides/user-decryption.md) to enable users to decrypt data with their own keys, once permissions have been granted via Access Control List(ACL).

🟨 Go to [**Public decryption**](/protocol/solidity-guides/v0.10/docs/sdk-guides/public-decryption.md) to learn how to decrypt outputs that are publicly accessible, either via HTTP or onchain Oracle.

🟨 Go to [**Solidity ACL Guide**](https://docs.zama.ai/protocol/solidity-guides/smart-contract/acl) for more detailed instructions about access control.

## Help center

Ask technical questions and discuss with the community.

* [Community forum](https://community.zama.ai/c/zama-protocol/15)
* [Discord channel](https://discord.com/invite/zama)


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