Function finishAuth

packages/arctic/src/mcp/index.ts:517–552

(mcpName: string, authorizationCode: string)

   * Complete OAuth authentication with the authorization code.
   */
  export async function finishAuth(mcpName: string, authorizationCode: string): Promise<Status> {
    const transport = pendingOAuthTransports.get(mcpName)

    if (!transport) {
      throw new Error(`No pending OAuth flow for MCP server: ${mcpName}`)
    }

    try {
      // Call finishAuth on the transport
      await transport.finishAuth(authorizationCode)

      // Clear the code verifier after successful auth
      await McpAuth.clearCodeVerifier(mcpName)

      // Now try to reconnect
      const cfg = await Config.get()
      const mcpConfig = cfg.mcp?.[mcpName]

      if (!mcpConfig) {
        throw new Error(`MCP server not found: ${mcpName}`)
      }

      // Re-add the MCP server to establish connection
      pendingOAuthTransports.delete(mcpName)
      const result = await add(mcpName, mcpConfig)

      const statusRecord = result.status as Record<string, Status>
      return statusRecord[mcpName] ?? { status: "failed", error: "Unknown error after auth" }
    } catch (error) {
      log.error("failed to finish oauth", { mcpName, error })
      return {
        status: "failed",
        error: error instanceof Error ? error.message : String(error),
      }
    }
  }

  /**
   * Remove OAuth credentials for an MCP server.