> For the complete documentation index, see [llms.txt](https://docs.gravity.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.gravity.xyz/legacy-alpha-mainnet-l2/using-gravity-alpha-mainnet-l2.md).

# Alpha Mainnet & Sepolia Testnet (L2)

Gravity Alpha Mainnet & Sepolia Testnet Information

{% hint style="danger" %}
**Action required — bridge out before November 1, 2026.** Gravity Alpha Mainnet (L2) users should move **all** assets back to Ethereum before **November 1, 2026**. See [Bridge Assets back to Ethereum](/legacy-alpha-mainnet-l2/bridge-back-to-ethereum.md).
{% endhint %}

**Gravity Mainnet (L1)** is now live and is the canonical production chain — see [Gravity Mainnet (L1)](/gravity-networks/l1-mainnet.md). This page documents the legacy **Gravity Alpha Mainnet (L2)**, an Ethereum rollup using the Arbitrum Nitro stack that preceded it and remains operational.

Gravity Alpha Mainnet can be added as a custom network to any EVM-compatible wallet (i.e. MetaMask).

## Network

### Gravity Alpha Mainnet

[*Add Gravity Alpha Mainnet to Metamask*](https://chainlist.org/chain/1625)

* Chain ID: 1625, `0x659`
* Currency Symbol / Native Token: `G`
* RPC Endpoint: [https://rpc.gravity.xyz](https://rpc.gravity.xyz/)
* Canonical Bridge: <https://bridge.gravity.xyz>
* Block Explorer:
  * [OKX Explorer](https://web3.okx.com/explorer/gravity-alpha)
  * [OKLink](https://www.oklink.com/gravity-alpha)
  * [Blockscout](https://explorer.gravity.xyz)
* Logo: <https://assets.gravity.xyz/chain_logo.png>, or [visit this link](https://gal.xyz/brand) for different versions

### Gravity Alpha Testnet Sepolia

{% hint style="info" %}
Gravity Alpha Testnet Sepolia was reset (pruned the state and started over with block height 0) on March 24th 2025 for testing Celestia DA.
{% endhint %}

[*Add Gravity Alpha Testnet Sepolia to Metamask*](https://chainlist.org/chain/13505)

* Chain ID: 13505, `0x34c1`
* Currency Symbol / Native Token: `G`
* RPC Endpoint: <https://rpc-sepolia.gravity.xyz>
* Canonical Bridge: [https://bridge-sepolia.gravity.xyz](https://bridge-sepolia.gravity.xyz/)
* Block Explorer: <https://explorer-sepolia.gravity.xyz>
* Logo: <https://assets.gravity.xyz/chain_logo.png>, or [visit this link](https://gal.xyz/brand) for different versions

## Chain Parameters

| Param                | Description                                                                                               | G Alpha Mainnet             | G Sepolia Testnet          |
| -------------------- | --------------------------------------------------------------------------------------------------------- | --------------------------- | -------------------------- |
| Dispute window       | Time for assertions to get confirmed during which validators can issue a challenge                        | 45818 blocks (\~ 6.4 days ) | 20 blocks (\~ 4.0 minutes) |
| Force-include period | Period after which a delayed message can be included into the inbox without any action from the Sequencer | 5760 blocks / 24 hours      | 5760 blocks / 24 hours     |
| Gas speed limit      | Target gas/sec, over which the congestion mechanism activates                                             | 20,000,000 gas/sec          | 7,000,000 gas/sec          |
| Gas price floor      | Minimum gas price                                                                                         | 1800 gwei                   | 0.1 gwei                   |
| Block gas limit      | Maximum amount of gas that all the transactions inside a block are allowed to consume                     | 32,000,000                  | 32,000,000                 |

NOTE: The parameters, including gas price and gas fee, will take effect at 12:00 PM on August 20, 2024, PDT. Until that time, the chain will operate using experimental parameters for internal testing purposes.\
NOTE: We lowered the gas price floor from 3600 gwei to 1800 gwei, effective from 12:00 PM on August 22, 2024, PDT.


---

# Agent Instructions
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```
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