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Trivial: add comments for NFToken-related invariants (#4558)

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This commit is contained in:
Scott Schurr
2023-06-08 17:31:19 -07:00
committed by GitHub
parent c9a586c243
commit 5644c8704f
1 changed files with 24 additions and 0 deletions
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24
src/ripple/app/tx/impl/InvariantCheck.h
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@@ -318,6 +318,17 @@ public:
beast::Journal const&);
};
/**
* @brief Invariant: Validates several invariants for NFToken pages.
*
* The following checks are made:
* - The page is correctly associated with the owner.
* - The page is correctly ordered between the next and previous links.
* - The page contains at least one and no more than 32 NFTokens.
* - The NFTokens on this page do not belong on a lower or higher page.
* - The NFTokens are correctly sorted on the page.
* - Each URI, if present, is not empty.
*/
class ValidNFTokenPage
{
bool badEntry_ = false;
@@ -342,6 +353,19 @@ public:
beast::Journal const&);
};
/**
* @brief Invariant: Validates counts of NFTokens after all transaction types.
*
* The following checks are made:
* - The number of minted or burned NFTokens can only be changed by
* NFTokenMint or NFTokenBurn transactions.
* - A successful NFTokenMint must increase the number of NFTokens.
* - A failed NFTokenMint must not change the number of minted NFTokens.
* - An NFTokenMint transaction cannot change the number of burned NFTokens.
* - A successful NFTokenBurn must increase the number of burned NFTokens.
* - A failed NFTokenBurn must not change the number of burned NFTokens.
* - An NFTokenBurn transaction cannot change the number of minted NFTokens.
*/
class NFTokenCountTracking
{
std::uint32_t beforeMintedTotal = 0;