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Gateway Token Validation: JWKS Retrieval and Cache Rotation in Node.js 20

Short answer: validate gateway tokens with public JWKS keys, keep a bounded refresh path for rotation, and fail closed for signup traffic when key retrieval cannot be trusted.

  • Node.js 20 validates gateway tokens using JWKS documents
  • Cache rotation implemented with 5-minute max age and 30-second cooldown
  • authenticateGatewayToken function verifies tokens and handles expiration

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