# Function parseATL

- parseATL(
  atl: string,
  ):
  | {
  tier: "1"
  | "2"
  | "3"
  | "4";
  source: string;
  user: string;
  sanitized: boolean;
  rep?: number;
  }
  | undefined

  Parses an ATL string back into structured data. Returns undefined if the string is not a valid ATL.

  #### Parameters

  - atl: string

  #### Returns
  | {
  tier: "1"
  | "2"
  | "3"
  | "4";
  source: string;
  user: string;
  sanitized: boolean;
  rep?: number;
  }
  | undefined

  - Defined in packages/nexus-agents/src/security/firewall/agent-trust-labels.ts:49