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Add deep freeze feature (XLS-77d) (#5187)

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- spec: XRPLF/XRPL-Standards#220
- amendment: "DeepFreeze"
- implemented deep freeze spec to allow token issuers to prevent currency holders from being able to acquire more of these tokens.
- in combination with normal freeze, deep freeze effectively prevents any balance trust line balance change of a currency holder (except direct issuer <-> holder payments).
- added 2 new invariant checks to verify that deep freeze cannot be enacted without normal freeze and transfer is not frozen.
- made some fixes to existing freeze handling.

Co-authored-by: Ed Hennis <ed@ripple.com>
Co-authored-by: Howard Hinnant <howard.hinnant@gmail.com>
This commit is contained in:
Vlad
2025-01-31 18:40:33 +00:00
committed by GitHub
parent 1b75dc8bcd
commit 33e1c42599
21 changed files with 2479 additions and 49 deletions
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2
include/xrpl/protocol/Feature.h
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@@ -80,7 +80,7 @@ namespace detail {
// Feature.cpp. Because it's only used to reserve storage, and determine how
// large to make the FeatureBitset, it MAY be larger. It MUST NOT be less than
// the actual number of amendments. A LogicError on startup will verify this.
static constexpr std::size_t numFeatures = 85;
static constexpr std::size_t numFeatures = 86;
/** Amendments that this server supports and the default voting behavior.
Whether they are enabled depends on the Rules defined in the validated

10
include/xrpl/protocol/LedgerFormats.h
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@@ -160,10 +160,12 @@ enum LedgerSpecificFlags {
lsfHighAuth = 0x00080000,
lsfLowNoRipple = 0x00100000,
lsfHighNoRipple = 0x00200000,
lsfLowFreeze = 0x00400000, // True, low side has set freeze flag
lsfHighFreeze = 0x00800000, // True, high side has set freeze flag
lsfAMMNode = 0x01000000, // True, trust line to AMM. Used by client
// apps to identify payments via AMM.
lsfLowFreeze = 0x00400000, // True, low side has set freeze flag
lsfHighFreeze = 0x00800000, // True, high side has set freeze flag
lsfLowDeepFreeze = 0x02000000, // True, low side has set deep freeze flag
lsfHighDeepFreeze = 0x04000000, // True, high side has set deep freeze flag
lsfAMMNode = 0x01000000, // True, trust line to AMM. Used by client
// apps to identify payments via AMM.
// ltSIGNER_LIST
lsfOneOwnerCount = 0x00010000, // True, uses only one OwnerCount

4
include/xrpl/protocol/TxFlags.h
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@@ -114,9 +114,11 @@ constexpr std::uint32_t tfSetNoRipple = 0x00020000;
constexpr std::uint32_t tfClearNoRipple = 0x00040000;
constexpr std::uint32_t tfSetFreeze = 0x00100000;
constexpr std::uint32_t tfClearFreeze = 0x00200000;
constexpr std::uint32_t tfSetDeepFreeze = 0x00400000;
constexpr std::uint32_t tfClearDeepFreeze = 0x00800000;
constexpr std::uint32_t tfTrustSetMask =
~(tfUniversal | tfSetfAuth | tfSetNoRipple | tfClearNoRipple | tfSetFreeze |
tfClearFreeze);
tfClearFreeze | tfSetDeepFreeze | tfClearDeepFreeze);
// EnableAmendment flags:
constexpr std::uint32_t tfGotMajority = 0x00010000;

2
include/xrpl/protocol/detail/features.macro
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@@ -29,6 +29,7 @@
// If you add an amendment here, then do not forget to increment `numFeatures`
// in include/xrpl/protocol/Feature.h.
XRPL_FEATURE(DeepFreeze, Supported::yes, VoteBehavior::DefaultNo)
XRPL_FEATURE(PermissionedDomains, Supported::no, VoteBehavior::DefaultNo)
XRPL_FEATURE(DynamicNFT, Supported::yes, VoteBehavior::DefaultNo)
XRPL_FEATURE(Credentials, Supported::yes, VoteBehavior::DefaultNo)
@@ -116,3 +117,4 @@ XRPL_FIX (NFTokenNegOffer, Supported::yes, VoteBehavior::Obsolete)
XRPL_FIX (NFTokenDirV1, Supported::yes, VoteBehavior::Obsolete)
XRPL_FEATURE(NonFungibleTokensV1, Supported::yes, VoteBehavior::Obsolete)
XRPL_FEATURE(CryptoConditionsSuite, Supported::yes, VoteBehavior::Obsolete)

2
include/xrpl/protocol/jss.h
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@@ -284,6 +284,8 @@ JSS(flags); // out: AccountOffers,
JSS(forward); // in: AccountTx
JSS(freeze); // out: AccountLines
JSS(freeze_peer); // out: AccountLines
JSS(deep_freeze); // out: AccountLines
JSS(deep_freeze_peer); // out: AccountLines
JSS(frozen_balances); // out: GatewayBalances
JSS(full); // in: LedgerClearer, handlers/Ledger
JSS(full_reply); // out: PathFind