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serial_number

        # OpenSSL::Timestamp::TokenInfo.serial_number

(from ruby core)
### Implementation from TokenInfo
---
    token_info.serial_number -> BN or nil

---

Returns serial number of the timestamp token. This value shall never be
the same for two timestamp tokens issued by a dedicated timestamp
authority. If status is GRANTED or GRANTED_WITH_MODS, this is never
`nil`.



      

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