> For the complete documentation index, see [llms.txt](https://docs.bastionwallet.io/bastion-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bastionwallet.io/bastion-sdk/introduction/chains-supported.md).

# Chains supported

Currently, the Bastion SDK has been released as a public alpha. It is only available on testnets. We are currently undergoing a security audit, and once that is completed, we will launch on all the major testnets.

### Mainnets

| Chain Name | Chain Id |
| ---------- | -------- |
| Ethereum   | 1        |
| Polygon    | 137      |
| Arbitrum   | 42162    |
| Scroll     | 534352   |
| Base       | 8453     |

### Testnets

| Chain Name             | Chain Id |
| ---------------------- | -------- |
| Arbitrum Goerli        | 421613   |
| Polygon Mumbai         | 80001    |
| Base Goerli testnet    | 84531    |
| Optimism Goerli        | 420      |
| Scroll Sepolia Testnet | 534353   |