Google オパーク ペイメント カードの仕様
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最終更新日 2023-05-30 UTC。
[null,null,["最終更新日 2023-05-30 UTC。"],[],["The document outlines the structure and process for creating a Google Opaque Payment Card (OPC). This involves constructing a JSON object with `protocolHeader`, `validationContext` (including a `serverSessionId`), and `paymentCard` (containing `accountNumber`, `expiryMonth`, and `expiryYear`). This JSON is then signed and encrypted using OpenPGP and encoded using Base64 on the server side to maintain key security. The resulting Base64 encoded byte array is sent back to the client.\n"]]