Add Unichain support. (#1725)

* Add Unichain support.

Signed-off-by: bgravenorst <[email protected]>

* Apply suggestions from code review

* Update services/reference/unichain/json-rpc-methods/_eth_unichain-call-parameters.mdx

* Address reviewer feedback.

Signed-off-by: bgravenorst <[email protected]>

* Add logo.

Signed-off-by: bgravenorst <[email protected]>

---------

Signed-off-by: bgravenorst <[email protected]>
Co-authored-by: Alexandra Carrillo <[email protected]>

Author: bgravenorst

docs/whats-new.md

@@ -11,6 +11,7 @@ of the [MetaMask developer page](https://metamask.io/developer/).
 
 ## November 2024
 
+- Documented [Unichain Sepolia](/services/reference/unichain) support. ([#1725](https://github.com/MetaMask/metamask-docs/pull/1725))
 - Updated Snaps [Custom UI documentation](/snaps/features/custom-ui/) for MetaMask Extension version 12.6.
   ([#1715](https://github.com/MetaMask/metamask-docs/pull/1715))
 - Added tutorial for

services/get-started/endpoints.md

@@ -155,6 +155,12 @@ Include your authentication details when [making IPFS requests](/reference/ipfs/
 | Mainnet           | JSON-RPC over HTTPS | `https://starknet-mainnet.infura.io/v3/<YOUR-API-KEY>` |
 | Testnet (Sepolia) | JSON-RPC over HTTPS | `https://starknet-sepolia.infura.io/v3/<YOUR-API-KEY>` |
 
+## Unichain
+
+| Network | Description             | URL                                                   |
+|---------|-------------------------|-------------------------------------------------------|
+| Sepolia | JSON-RPC over HTTPS     | `https://unichain-sepolia.infura.io/v3/<YOUR-API-KEY>`  |
+
 ## ZKsync Era
 
 :::info

services/reference/unichain/_unichain-networks.mdx

@@ -0,0 +1,4 @@
+| Network            | Description             | URL                                                     |
+|--------------------|-------------------------|---------------------------------------------------------|
+| Testnet (Sepolia)  | JSON-RPC over HTTPS     | `https://unichain-sepolia.infura.io/v3/<YOUR-API-KEY>`  |
+

services/reference/unichain/choose-a-network.md

@@ -0,0 +1,17 @@
+---
+description: Supported Unichain networks
+sidebar_position: 3
+---
+
+# Supported networks
+
+Use one of these endpoints as your Unichain client provider, and ensure that you replace
+`<YOUR-API-KEY>` with an API key from your [dashboard](https://infura.io/dashboard).
+
+:::note
+Unichain mainnet hasn't been launched yet.
+:::
+
+import UnichainNetworks from "./_unichain-networks.mdx";
+
+<UnichainNetworks />

services/reference/unichain/index.md

@@ -0,0 +1,63 @@
+---
+description: Unichain network information.
+---
+
+import CardList from '@site/src/components/CardList'
+
+# Unichain
+
+:::note Decentralized Infrastructure Network (DIN)
+
+Unichain testnet is supported through the [DIN](https://www.infura.io/solutions/decentralized-infrastructure-service) service,
+meaning calls to the network are routed to [partner infrastructure providers](#partners-and-privacy-policies).
+
+Infura provides Open Beta access to Unichain testnet. During this period, there might be feature limitations.
+Performance issues aren't expected, but they're possible as we optimize and stabilize the service.
+
+:::
+
+Unichain is a layer-2 Optimistic Rollup for Ethereum that's designed to be fast, decentralized, and
+optimized for DeFi applications.
+
+This allows Unichain to scale the experience of Ethereum, ensuring cheaper and more accessible data while
+maintaining the robust security inherent to Ethereum.
+
+Infura provides access to the [Unichain JSON-RPC API](json-rpc-methods/index.md) method library that
+interacts with the Unichain blockchain. Methods include functionality for reading and writing data to the network,
+and executing smart contracts.
+
+:::info See also
+
+See the [official Unichain documentation](https://docs.unichain.org/docs) for more information.
+
+:::
+
+<CardList
+  items={[
+    {
+      href: "quickstart",
+      title: "Quickstart",
+      description: "Learn how to quickly connect and make calls to the Unichain network."
+    },
+    {
+      href: "json-rpc-methods",
+      title: "JSON-RPC APIs",
+      description: "View the APIs available for communicating with the Unichain network."
+    },
+    {
+      href: "../../../developer-tools/dashboard/get-started/create-api/",
+      title: "Create an API key",
+      description: "Learn how to create an API key and secure and share it with your team."
+    }
+  ]}
+/>
+
+## Partners and privacy policies
+
+The following partners provide access to the Unichain network:
+
+<!-- markdown-link-check-disable -->
+
+- InfStones ([Privacy Policy](https://infstones.com/terms/privacy-notice))
+- 0xFury ([Privacy policy](https://0xfury.com/privacy.php))
+<!-- markdown-link-check-enable -->

services/reference/unichain/json-rpc-methods/_eth_accounts-request.mdx

@@ -0,0 +1,14 @@
+import Tabs from "@theme/Tabs"
+import TabItem from "@theme/TabItem"
+
+<Tabs>
+  <TabItem value="curl">
+
+```bash
+curl https://unichain-sepolia.infura.io/v3/<YOUR-API-KEY> \
+  -X POST \
+  -H "Content-Type: application/json" \
+  -d '{"jsonrpc": "2.0", "method": "eth_accounts", "params": [], "id": 1}'
+```
+  </TabItem>
+</Tabs>

services/reference/unichain/json-rpc-methods/_eth_blocknumber-request.mdx

@@ -0,0 +1,15 @@
+import Tabs from "@theme/Tabs"
+import TabItem from "@theme/TabItem"
+
+<Tabs>
+  <TabItem value="curl">
+
+```bash
+curl https://unichain-sepolia.infura.io/v3/<YOUR-API-KEY> \
+  -X POST \
+  -H "Content-Type: application/json" \
+  -d '{"jsonrpc": "2.0", "method": "eth_blockNumber", "params": [], "id": 1}'
+```
+
+  </TabItem>
+</Tabs>

services/reference/unichain/json-rpc-methods/_eth_call-request.mdx

@@ -0,0 +1,15 @@
+import Tabs from "@theme/Tabs"
+import TabItem from "@theme/TabItem"
+
+<Tabs>
+  <TabItem value="curl">
+
+```bash
+curl https://unichain-sepolia.infura.io/v3/<YOUR-API-KEY> \
+  -X POST \
+  -H "Content-Type: application/json" \
+  -d '{"jsonrpc": "2.0", "method": "eth_call", "params": [{"from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155", "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567", "gas": "0x76c0", "gasPrice": "0x9184e72a000", "value": "0x9184e72a", "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"}, "latest"], "id": 1}'
+```
+
+  </TabItem>
+</Tabs>

services/reference/unichain/json-rpc-methods/_eth_chainid-request.mdx

@@ -0,0 +1,15 @@
+import Tabs from "@theme/Tabs"
+import TabItem from "@theme/TabItem"
+
+<Tabs>
+  <TabItem value="curl">
+
+```bash
+curl https://unichain-sepolia.infura.io/v3/<YOUR-API-KEY> \
+  -X POST \
+  -H "Content-Type: application/json" \
+  -d '{"jsonrpc": "2.0", "method": "eth_chainId", "params": [], "id": 1}'
+```
+
+  </TabItem>
+</Tabs>

services/reference/unichain/json-rpc-methods/_eth_estimategas-request.mdx

@@ -0,0 +1,14 @@
+import Tabs from "@theme/Tabs"
+import TabItem from "@theme/TabItem"
+
+<Tabs>
+  <TabItem value="curl">
+
+```bash
+curl https://unichain-sepolia.infura.io/v3/<YOUR-API-KEY> \
+  -X POST \
+  -H "Content-Type: application/json" \
+  -d '{"jsonrpc": "2.0", "method": "eth_estimateGas", "params": [{"from": "0x9cE564c7d09f88E7d8233Cdd3A4d7AC42aBFf3aC", "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567", "value": "0x9184e72a"}], "id": 1}'
+```
+  </TabItem>
+</Tabs>