> ## Documentation Index
> Fetch the complete documentation index at: https://protochain.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Assign Owner

> Build a System Program instruction to change an account's owner program, with or without a seed.

<Note>
  This method returns a SolanaInstruction. Add it to a transaction and use the
  Transaction Service to execute it on-chain. See [Instructions &
  Transactions](/concepts/instructions-and-transactions).
</Note>

## Assign

Changes the owner program of an account. Only the account's current owner program or System Program can assign a new owner. The account must be a signer.

### Request

<ResponseField name="account" type="Base58-encoded public key (string)" required>
  The account to reassign. Must be a signer.
</ResponseField>

<ResponseField name="owner_program" type="Base58-encoded public key (string)" required>
  The new owner program address.
</ResponseField>

### Response

<ResponseField name="instruction" type="SolanaInstruction (object)">
  The assign instruction. Add this to a transaction and submit it via the Transaction Service.
</ResponseField>

### Code Examples

<CodeGroup>
  ```go Go theme={null}
  resp, err := client.Assign(ctx, &system_v1.AssignRequest{
      Account:      "7EcDhSYGxXyscszYEp35KHN8vvw3svAuLKTzXwCFLtV",
      OwnerProgram: "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA",
  })
  if err != nil {
      log.Fatal(err)
  }
  // Add instruction to your transaction
  instruction := resp.Instruction
  ```

  ```rust Rust theme={null}
  let response = client.assign(tonic::Request::new(AssignRequest {
      account: "7EcDhSYGxXyscszYEp35KHN8vvw3svAuLKTzXwCFLtV".to_string(),
      owner_program: "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA".to_string(),
  })).await?;
  // Add instruction to your transaction
  let instruction = response.into_inner().instruction.unwrap();
  ```

  ```typescript TypeScript theme={null}
  const req = new AssignRequest();
  req.setAccount("7EcDhSYGxXyscszYEp35KHN8vvw3svAuLKTzXwCFLtV");
  req.setOwnerProgram("TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA");
  client.assign(req, (err, response) => {
    // Add instruction to your transaction
    const instruction = response.getInstruction();
  });
  ```
</CodeGroup>

***

## AssignWithSeed

Reassigns the owner of a seed-derived account. The base key must sign the transaction — not the derived account address.

### Request

<ResponseField name="account" type="Base58-encoded public key (string)" required>
  The seed-derived account address to reassign.
</ResponseField>

<ResponseField name="base" type="Base58-encoded public key (string)" required>
  Base public key used to derive `account`. Must be a signer.
</ResponseField>

<ResponseField name="seed" type="string" required>
  Seed string used to derive `account`.
</ResponseField>

<ResponseField name="owner_program" type="Base58-encoded public key (string)" required>
  The new owner program address.
</ResponseField>

### Response

<ResponseField name="instruction" type="SolanaInstruction (object)">
  The assign\_with\_seed instruction. Add this to a transaction and submit it via the Transaction Service.
</ResponseField>

### Code Examples

<CodeGroup>
  ```go Go theme={null}
  resp, err := client.AssignWithSeed(ctx, &system_v1.AssignWithSeedRequest{
      Account:      "9xQeWvG816bUx9EPjHmaT23yvVM2ZWbrrpZb9PusVFin",
      Base:         "7EcDhSYGxXyscszYEp35KHN8vvw3svAuLKTzXwCFLtV",
      Seed:         "my-program-data",
      OwnerProgram: "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA",
  })
  if err != nil {
      log.Fatal(err)
  }
  // Add instruction to your transaction
  instruction := resp.Instruction
  ```

  ```rust Rust theme={null}
  let response = client.assign_with_seed(tonic::Request::new(AssignWithSeedRequest {
      account: "9xQeWvG816bUx9EPjHmaT23yvVM2ZWbrrpZb9PusVFin".to_string(),
      base: "7EcDhSYGxXyscszYEp35KHN8vvw3svAuLKTzXwCFLtV".to_string(),
      seed: "my-program-data".to_string(),
      owner_program: "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA".to_string(),
  })).await?;
  // Add instruction to your transaction
  let instruction = response.into_inner().instruction.unwrap();
  ```

  ```typescript TypeScript theme={null}
  const req = new AssignWithSeedRequest();
  req.setAccount("9xQeWvG816bUx9EPjHmaT23yvVM2ZWbrrpZb9PusVFin");
  req.setBase("7EcDhSYGxXyscszYEp35KHN8vvw3svAuLKTzXwCFLtV");
  req.setSeed("my-program-data");
  req.setOwnerProgram("TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA");
  client.assignWithSeed(req, (err, response) => {
    // Add instruction to your transaction
    const instruction = response.getInstruction();
  });
  ```
</CodeGroup>