> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cdp.coinbase.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Key Addresses

This page lists all deployed addresses for the Stableswapper program. Reference these when constructing transactions or integrating with the contract.

<Warning>
  These docs currently show **devnet/testnet addresses only**. Do not use these addresses on mainnet. Mainnet addresses will be provided during your production onboarding.
</Warning>

<Tabs>
  <Tab title="Ethereum Virtual Machine">
    ## Contract

    | Network      | Contract Address                             |
    | ------------ | -------------------------------------------- |
    | Base Sepolia | `0x57AB1E2c6289aCe985Bd5c5571EbF6d98CD41Ab7` |

    ## Token Addresses

    | Network      | Token  | Address                                      |
    | ------------ | ------ | -------------------------------------------- |
    | Base Sepolia | USDC   | `0x036CbD53842c5426634e7929541eC2318f3dCF7e` |
    | Base Sepolia | CBTUSD | `0x57AB1EFE59b1C7b36b1Dc9315B4782bCcBb83721` |

    <Note>
      CBTUSD is a testnet custom stablecoin on Base Sepolia, used as the example token throughout this documentation.
      Your custom stablecoin address will be provided separately during onboarding.
    </Note>
  </Tab>

  <Tab title="Solana Virtual Machine">
    ## Program

    | Network       | Program ID                                     |
    | ------------- | ---------------------------------------------- |
    | Solana Devnet | `9vDwZVJXw5nxymWmUcgmNpemDH5EBcJwLNhtsznrgJDH` |

    ## Token Mints

    | Network       | Token  | Mint Address                                   |
    | ------------- | ------ | ---------------------------------------------- |
    | Solana Devnet | USDC   | `4zMMC9srt5Ri5X14GAgXhaHii3GnPAEERYPJgZJDncDU` |
    | Solana Devnet | CBTUSD | `5P6MkoaCd9byPxH4X99kgKtS6SiuCQ67ZPCJzpXGkpCe` |

    <Note>
      CBTUSD is a testnet custom stablecoin, used as the example token throughout this documentation.
      Your custom stablecoin mint address will be provided separately during onboarding.
    </Note>

    ## Program Derived Addresses (PDAs)

    These accounts are deterministically derived from the program ID using the seeds shown. You do not need to store them — derive them at runtime using `PublicKey.findProgramAddressSync`.

    | Account   | Address                                        | Seeds                   | Role                                                                         |
    | --------- | ---------------------------------------------- | ----------------------- | ---------------------------------------------------------------------------- |
    | Pool      | `68xwTJYRyUdULbb5ve4JMWTc2xvw9wQmtEj9GRoHSenF` | `["liquidity_pool"]`    | Central pool state — holds fee rate, fee recipient, and supported vault list |
    | Whitelist | `8zVAo6z2juAcVMkn3booA4yMGym5BPUJey2iN1Nq7Hvr` | `["address_whitelist"]` | Address allowlist checked against the transaction signer on every swap       |

    Token vaults and vault token accounts are derived per-mint at runtime:

    ```typescript theme={null}
    // Vault PDA (logical owner for a token's reserves)
    const [vault] = PublicKey.findProgramAddressSync(
      [Buffer.from("token_vault"), pool.toBuffer(), mintAddress.toBuffer()],
      programId
    );

    // Vault Token Account (where reserves actually live)
    const [vaultTokenAccount] = PublicKey.findProgramAddressSync(
      [Buffer.from("vault_token_account"), vault.toBuffer()],
      programId
    );
    ```

    ## Constant Program Addresses

    These well-known Solana program addresses are required as accounts in every swap instruction.

    | Program                  | Address                                        |
    | ------------------------ | ---------------------------------------------- |
    | SPL Token Program        | `TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA`  |
    | Associated Token Program | `ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL` |
    | System Program           | `11111111111111111111111111111111`             |
  </Tab>
</Tabs>

<Warning>
  **Privacy notice:** All transactions on devnet and testnet blockchains are publicly visible. To protect your privacy during testing, we recommend using a dedicated test wallet rather than a personal wallet, as your wallet address and transaction history may be viewable by anyone on the blockchain.
</Warning>