Introduce NFT support (XLS-20)

Builds/CMake/RippledCore.cmake

@@ -420,6 +420,11 @@ target_sources (rippled PRIVATE
   src/ripple/app/tx/impl/DepositPreauth.cpp
   src/ripple/app/tx/impl/Escrow.cpp
   src/ripple/app/tx/impl/InvariantCheck.cpp
+  src/ripple/app/tx/impl/NFTokenAcceptOffer.cpp
+  src/ripple/app/tx/impl/NFTokenBurn.cpp
+  src/ripple/app/tx/impl/NFTokenCancelOffer.cpp
+  src/ripple/app/tx/impl/NFTokenCreateOffer.cpp
+  src/ripple/app/tx/impl/NFTokenMint.cpp
   src/ripple/app/tx/impl/OfferStream.cpp
   src/ripple/app/tx/impl/PayChan.cpp
   src/ripple/app/tx/impl/Payment.cpp
@@ -432,6 +437,7 @@ target_sources (rippled PRIVATE
   src/ripple/app/tx/impl/Transactor.cpp
   src/ripple/app/tx/impl/apply.cpp
   src/ripple/app/tx/impl/applySteps.cpp
+  src/ripple/app/tx/impl/details/NFTokenUtils.cpp
   #[===============================[
      main sources:
        subdir: basics (partial)
@@ -593,6 +599,7 @@ target_sources (rippled PRIVATE
   src/ripple/rpc/handlers/LogLevel.cpp
   src/ripple/rpc/handlers/LogRotate.cpp
   src/ripple/rpc/handlers/Manifest.cpp
+  src/ripple/rpc/handlers/NFTOffers.cpp
   src/ripple/rpc/handlers/NodeToShard.cpp
   src/ripple/rpc/handlers/NoRippleCheck.cpp
   src/ripple/rpc/handlers/OwnerInfo.cpp
@@ -687,6 +694,9 @@ if (tests)
     src/test/app/LoadFeeTrack_test.cpp
     src/test/app/Manifest_test.cpp
     src/test/app/MultiSign_test.cpp
+    src/test/app/NFToken_test.cpp
+    src/test/app/NFTokenBurn_test.cpp
+    src/test/app/NFTokenDir_test.cpp
     src/test/app/OfferStream_test.cpp
     src/test/app/Offer_test.cpp
     src/test/app/OversizeMeta_test.cpp
@@ -836,6 +846,7 @@ if (tests)
     src/test/jtx/impl/sig.cpp
     src/test/jtx/impl/tag.cpp
     src/test/jtx/impl/ticket.cpp
+    src/test/jtx/impl/token.cpp
     src/test/jtx/impl/trust.cpp
     src/test/jtx/impl/txflags.cpp
     src/test/jtx/impl/utility.cpp

src/ripple/app/misc/NetworkOPs.cpp

@@ -1178,6 +1178,7 @@ NetworkOPsImp::processTransaction(
     if ((newFlags & SF_BAD) != 0)
     {
         // cached bad
+        JLOG(m_journal.warn()) << transaction->getID() << ": cached bad!\n";
         transaction->setStatus(INVALID);
         transaction->setResult(temBAD_SIGNATURE);
         return;

src/ripple/app/tx/impl/CancelOffer.cpp

@@ -27,8 +27,7 @@ namespace ripple {
 NotTEC
 CancelOffer::preflight(PreflightContext const& ctx)
 {
-    auto const ret = preflight1(ctx);
-    if (!isTesSuccess(ret))
+    if (auto const ret = preflight1(ctx); !isTesSuccess(ret))
         return ret;
 
     auto const uTxFlags = ctx.tx.getFlags();

src/ripple/app/tx/impl/CashCheck.cpp

@@ -125,22 +125,13 @@ CashCheck::preclaim(PreclaimContext const& ctx)
             return tecDST_TAG_NEEDED;
         }
     }
+
+    if (hasExpired(ctx.view, sleCheck->at(~sfExpiration)))
     {
-        using duration = NetClock::duration;
-        using timepoint = NetClock::time_point;
-        auto const optExpiry = sleCheck->at(~sfExpiration);
-
-        // Expiration is defined in terms of the close time of the parent
-        // ledger, because we definitively know the time that it closed but
-        // we do not know the closing time of the ledger that is under
-        // construction.
-        if (optExpiry &&
-            (ctx.view.parentCloseTime() >= timepoint{duration{*optExpiry}}))
-        {
-            JLOG(ctx.j.warn()) << "Cashing a check that has already expired.";
-            return tecEXPIRED;
-        }
+        JLOG(ctx.j.warn()) << "Cashing a check that has already expired.";
+        return tecEXPIRED;
     }
+
     {
         // Preflight verified exactly one of Amount or DeliverMin is present.
         // Make sure the requested amount is reasonable.

src/ripple/app/tx/impl/Change.cpp

@@ -180,7 +180,7 @@ Change::applyAmendment()
         // This amendment now has a majority
         newMajorities.push_back(STObject(sfMajority));
         auto& entry = newMajorities.back();
-        entry.emplace_back(STHash256(sfAmendment, amendment));
+        entry.emplace_back(STUInt256(sfAmendment, amendment));
         entry.emplace_back(STUInt32(
             sfCloseTime, view().parentCloseTime().time_since_epoch().count()));
 

src/ripple/app/tx/impl/CreateCheck.cpp

@@ -146,21 +146,10 @@ CreateCheck::preclaim(PreclaimContext const& ctx)
             }
         }
     }
+    if (hasExpired(ctx.view, ctx.tx[~sfExpiration]))
     {
-        using duration = NetClock::duration;
-        using timepoint = NetClock::time_point;
-        auto const optExpiry = ctx.tx[~sfExpiration];
-
-        // Expiration is defined in terms of the close time of the parent
-        // ledger, because we definitively know the time that it closed but
-        // we do not know the closing time of the ledger that is under
-        // construction.
-        if (optExpiry &&
-            (ctx.view.parentCloseTime() >= timepoint{duration{*optExpiry}}))
-        {
-            JLOG(ctx.j.warn()) << "Creating a check that has already expired.";
-            return tecEXPIRED;
-        }
+        JLOG(ctx.j.warn()) << "Creating a check that has already expired.";
+        return tecEXPIRED;
     }
     return tesSUCCESS;
 }

src/ripple/app/tx/impl/CreateOffer.cpp

@@ -42,8 +42,7 @@ CreateOffer::makeTxConsequences(PreflightContext const& ctx)
 NotTEC
 CreateOffer::preflight(PreflightContext const& ctx)
 {
-    auto const ret = preflight1(ctx);
-    if (!isTesSuccess(ret))
+    if (auto const ret = preflight1(ctx); !isTesSuccess(ret))
         return ret;
 
     auto& tx = ctx.tx;
@@ -173,14 +172,7 @@ CreateOffer::preclaim(PreclaimContext const& ctx)
         return temBAD_SEQUENCE;
     }
 
-    using d = NetClock::duration;
-    using tp = NetClock::time_point;
-    auto const expiration = ctx.tx[~sfExpiration];
-
-    // Expiration is defined in terms of the close time of the parent ledger,
-    // because we definitively know the time that it closed but we do not
-    // know the closing time of the ledger that is under construction.
-    if (expiration && (ctx.view.parentCloseTime() >= tp{d{*expiration}}))
+    if (hasExpired(ctx.view, ctx.tx[~sfExpiration]))
     {
         // Note that this will get checked again in applyGuts, but it saves
         // us a call to checkAcceptAsset and possible false negative.
@@ -951,13 +943,8 @@ CreateOffer::applyGuts(Sandbox& sb, Sandbox& sbCancel)
     }
 
     auto const expiration = ctx_.tx[~sfExpiration];
-    using d = NetClock::duration;
-    using tp = NetClock::time_point;
 
-    // Expiration is defined in terms of the close time of the parent ledger,
-    // because we definitively know the time that it closed but we do not
-    // know the closing time of the ledger that is under construction.
-    if (expiration && (sb.parentCloseTime() >= tp{d{*expiration}}))
+    if (hasExpired(sb, expiration))
     {
         // If the offer has expired, the transaction has successfully
         // done nothing, so short circuit from here.

src/ripple/app/tx/impl/DeleteAccount.cpp

@@ -20,12 +20,14 @@
 #include <ripple/app/tx/impl/DeleteAccount.h>
 #include <ripple/app/tx/impl/DepositPreauth.h>
 #include <ripple/app/tx/impl/SetSignerList.h>
+#include <ripple/app/tx/impl/details/NFTokenUtils.h>
 #include <ripple/basics/FeeUnits.h>
 #include <ripple/basics/Log.h>
 #include <ripple/basics/mulDiv.h>
 #include <ripple/ledger/View.h>
 #include <ripple/protocol/Feature.h>
 #include <ripple/protocol/Indexes.h>
+#include <ripple/protocol/Protocol.h>
 #include <ripple/protocol/TxFlags.h>
 #include <ripple/protocol/st.h>
 
@@ -40,9 +42,7 @@ DeleteAccount::preflight(PreflightContext const& ctx)
     if (ctx.tx.getFlags() & tfUniversalMask)
         return temINVALID_FLAG;
 
-    auto const ret = preflight1(ctx);
-
-    if (!isTesSuccess(ret))
+    if (auto const ret = preflight1(ctx); !isTesSuccess(ret))
         return ret;
 
     if (ctx.tx[sfAccount] == ctx.tx[sfDestination])
@@ -127,6 +127,21 @@ removeDepositPreauthFromLedger(
     return DepositPreauth::removeFromLedger(app, view, delIndex, j);
 }
 
+TER
+removeNFTokenOfferFromLedger(
+    Application& app,
+    ApplyView& view,
+    AccountID const& account,
+    uint256 const& delIndex,
+    std::shared_ptr<SLE> const& sleDel,
+    beast::Journal)
+{
+    if (!nft::deleteTokenOffer(view, sleDel))
+        return tefBAD_LEDGER;
+
+    return tesSUCCESS;
+}
+
 // Return nullptr if the LedgerEntryType represents an obligation that can't
 // be deleted.  Otherwise return the pointer to the function that can delete
 // the non-obligation
@@ -143,6 +158,8 @@ nonObligationDeleter(LedgerEntryType t)
             return removeTicketFromLedger;
         case ltDEPOSIT_PREAUTH:
             return removeDepositPreauthFromLedger;
+        case ltNFTOKEN_OFFER:
+            return removeNFTokenOfferFromLedger;
         default:
             return nullptr;
     }
@@ -177,6 +194,25 @@ DeleteAccount::preclaim(PreclaimContext const& ctx)
     if (!sleAccount)
         return terNO_ACCOUNT;
 
+    if (ctx.view.rules().enabled(featureNonFungibleTokensV1))
+    {
+        // If an issuer has any issued NFTs resident in the ledger then it
+        // cannot be deleted.
+        if ((*sleAccount)[~sfMintedNFTokens] !=
+            (*sleAccount)[~sfBurnedNFTokens])
+            return tecHAS_OBLIGATIONS;
+
+        // If the account owns any NFTs it cannot be deleted.
+        Keylet const first = keylet::nftpage_min(account);
+        Keylet const last = keylet::nftpage_max(account);
+
+        auto const cp = ctx.view.read(Keylet(
+            ltNFTOKEN_PAGE,
+            ctx.view.succ(first.key, last.key.next()).value_or(last.key)));
+        if (cp)
+            return tecHAS_OBLIGATIONS;
+    }
+
     // We don't allow an account to be deleted if its sequence number
     // is within 256 of the current ledger.  This prevents replay of old
     // transactions if this account is resurrected after it is deleted.
@@ -197,10 +233,10 @@ DeleteAccount::preclaim(PreclaimContext const& ctx)
     unsigned int uDirEntry{0};
     uint256 dirEntry{beast::zero};
 
+    // Account has no directory at all.  This _should_ have been caught
+    // by the dirIsEmpty() check earlier, but it's okay to catch it here.
     if (!cdirFirst(
             ctx.view, ownerDirKeylet.key, sleDirNode, uDirEntry, dirEntry))
-        // Account has no directory at all.  This _should_ have been caught
-        // by the dirIsEmpty() check earlier, but it's okay to catch it here.
         return tesSUCCESS;
 
     std::int32_t deletableDirEntryCount{0};

src/ripple/app/tx/impl/DeleteAccount.h

@@ -31,14 +31,6 @@ class DeleteAccount : public Transactor
 public:
     static constexpr ConsequencesFactoryType ConsequencesFactory{Blocker};
 
-    // Set a reasonable upper limit on the number of deletable directory
-    // entries an account may have before we decide the account can't be
-    // deleted.
-    //
-    // A limit is useful because if we go much past this limit the
-    // transaction will fail anyway due to too much metadata (tecOVERSIZE).
-    static constexpr std::int32_t maxDeletableDirEntries{1000};
-
     explicit DeleteAccount(ApplyContext& ctx) : Transactor(ctx)
     {
     }

src/ripple/app/tx/impl/DepositPreauth.cpp

@@ -33,8 +33,7 @@ DepositPreauth::preflight(PreflightContext const& ctx)
     if (!ctx.rules.enabled(featureDepositPreauth))
         return temDISABLED;
 
-    auto const ret = preflight1(ctx);
-    if (!isTesSuccess(ret))
+    if (auto const ret = preflight1(ctx); !isTesSuccess(ret))
         return ret;
 
     auto& tx = ctx.tx;

src/ripple/app/tx/impl/Escrow.cpp

@@ -102,8 +102,7 @@ EscrowCreate::preflight(PreflightContext const& ctx)
     if (ctx.rules.enabled(fix1543) && ctx.tx.getFlags() & tfUniversalMask)
         return temINVALID_FLAG;
 
-    auto const ret = preflight1(ctx);
-    if (!isTesSuccess(ret))
+    if (auto const ret = preflight1(ctx); !isTesSuccess(ret))
         return ret;
 
     if (!isXRP(ctx.tx[sfAmount]))
@@ -298,11 +297,8 @@ EscrowFinish::preflight(PreflightContext const& ctx)
     if (ctx.rules.enabled(fix1543) && ctx.tx.getFlags() & tfUniversalMask)
         return temINVALID_FLAG;
 
-    {
-        auto const ret = preflight1(ctx);
-        if (!isTesSuccess(ret))
-            return ret;
-    }
+    if (auto const ret = preflight1(ctx); !isTesSuccess(ret))
+        return ret;
 
     auto const cb = ctx.tx[~sfCondition];
     auto const fb = ctx.tx[~sfFulfillment];
@@ -511,8 +507,7 @@ EscrowCancel::preflight(PreflightContext const& ctx)
     if (ctx.rules.enabled(fix1543) && ctx.tx.getFlags() & tfUniversalMask)
         return temINVALID_FLAG;
 
-    auto const ret = preflight1(ctx);
-    if (!isTesSuccess(ret))
+    if (auto const ret = preflight1(ctx); !isTesSuccess(ret))
         return ret;
 
     return preflight2(ctx);