Add single asset vault (XLS-65d) (#5224)

- Specification: XRPLF/XRPL-Standards#239
- Amendment: `SingleAssetVault`
- Implements a vault feature used to store a fungible asset (XRP, IOU, or MPT, but not NFT) and to receive shares in the vault (an MPT) in exchange.
- A vault can be private or public.
- A private vault can use permissioned domains, subject to the `PermissionedDomains` amendment.
- Shares can be exchanged back into asset with `VaultWithdraw`.
- Permissions on the asset in the vault are transitively applied on shares in the vault.
- Issuer of the asset in the vault can clawback with `VaultClawback`.
- Extended `MPTokenIssuance` with `DomainID`, used by the permissioned domain on the vault shares.

Co-authored-by: John Freeman <jfreeman08@gmail.com>

src/xrpld/app/tx/detail/MPTokenAuthorize.cpp

@@ -83,6 +83,10 @@ MPTokenAuthorize::preclaim(PreclaimContext const& ctx)
                 return tecHAS_OBLIGATIONS;
             }
 
+            if (ctx.view.rules().enabled(featureSingleAssetVault) &&
+                sleMpt->isFlag(lsfMPTLocked))
+                return tecNO_PERMISSION;
+
             return tesSUCCESS;
         }
 
@@ -160,14 +164,14 @@ MPTokenAuthorize::authorize(
                 keylet::mptoken(args.mptIssuanceID, args.account);
             auto const sleMpt = view.peek(mptokenKey);
             if (!sleMpt || (*sleMpt)[sfMPTAmount] != 0)
-                return tecINTERNAL;
+                return tecINTERNAL;  // LCOV_EXCL_LINE
 
             if (!view.dirRemove(
                     keylet::ownerDir(args.account),
                     (*sleMpt)[sfOwnerNode],
                     sleMpt->key(),
                     false))
-                return tecINTERNAL;
+                return tecINTERNAL;  // LCOV_EXCL_LINE
 
             adjustOwnerCount(view, sleAcct, -1, journal);
 
@@ -194,20 +198,13 @@ MPTokenAuthorize::authorize(
 
         auto const mptokenKey =
             keylet::mptoken(args.mptIssuanceID, args.account);
-
-        auto const ownerNode = view.dirInsert(
-            keylet::ownerDir(args.account),
-            mptokenKey,
-            describeOwnerDir(args.account));
-
-        if (!ownerNode)
-            return tecDIR_FULL;
-
         auto mptoken = std::make_shared<SLE>(mptokenKey);
+        if (auto ter = dirLink(view, args.account, mptoken))
+            return ter;  // LCOV_EXCL_LINE
+
         (*mptoken)[sfAccount] = args.account;
         (*mptoken)[sfMPTokenIssuanceID] = args.mptIssuanceID;
         (*mptoken)[sfFlags] = 0;
-        (*mptoken)[sfOwnerNode] = *ownerNode;
         view.insert(mptoken);
 
         // Update owner count.