# Update a user label

Updates an existing label for the authenticated user.
The label to update is identified by the address provided in the URL,
which must include the chain type appended after a colon (e.g., "0xABCDEF1234567890:evm").
The request body should include the updated name, note, address, and chainType.

Endpoint: PUT /user/labels/{address}
Version: 1.0.0
Security: ApiKeyAuth

## Path parameters:

  - `address` (string, required)
    The address of the label to update with its chain type appended using a colon. Example: "0xABCDEF1234567890:evm".

## Request fields (application/json):

  - `name` (string, required)
    Example: "Ethereum Label"

  - `note` (string)
    Example: "Label for Ethereum address"

  - `address` (string, required)
    Example: "0xABCDEF1234567890"

  - `chainType` (string, required)
    Enum: "evm", "bitcoin", "tron", "ton", "solana", "dogecoin"

## Response 200 fields (application/json):

  - `name` (string, required)
    Example: "Bitoin Label"

  - `note` (string)
    Example: "Label for Bitcoin address"

  - `address` (string, required)
    Example: "1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa"

  - `chainType` (string, required)
    Enum: "evm", "bitcoin", "tron", "ton", "solana", "dogecoin"

## Response 400 fields (application/json):

  - `error` (string)
    Example: "Bad request"

## Response 401 fields (application/json):

  - `error` (string)
    Example: "API key missing or invalid"