VaultSet.cpp

#include <xrpl/ledger/View.h>
#include <xrpl/protocol/Asset.h>
#include <xrpl/protocol/Feature.h>
#include <xrpl/protocol/Indexes.h>
#include <xrpl/protocol/SField.h>
#include <xrpl/protocol/STNumber.h>
#include <xrpl/protocol/STTakesAsset.h>
#include <xrpl/protocol/TER.h>
#include <xrpl/protocol/TxFlags.h>
#include <xrpl/tx/transactors/vault/VaultSet.h>
 
namespace xrpl {
 
bool
VaultSet::checkExtraFeatures(PreflightContext const& ctx)
{
    return !ctx.tx.isFieldPresent(sfDomainID) || ctx.rules.enabled(featurePermissionedDomains);
}
 
NotTEC
VaultSet::preflight(PreflightContext const& ctx)
{
    if (ctx.tx[sfVaultID] == beast::zero)
    {
        JLOG(ctx.j.debug()) << "VaultSet: zero/empty vault ID.";
        return temMALFORMED;
    }
 
    if (auto const data = ctx.tx[~sfData])
    {
        if (data->empty() || data->length() > maxDataPayloadLength)
        {
            JLOG(ctx.j.debug()) << "VaultSet: invalid data payload size.";
            return temMALFORMED;
        }
    }
 
    if (auto const assetMax = ctx.tx[~sfAssetsMaximum])
    {
        if (*assetMax < beast::zero)
        {
            JLOG(ctx.j.debug()) << "VaultSet: invalid max assets.";
            return temMALFORMED;
        }
    }
 
    if (!ctx.tx.isFieldPresent(sfDomainID) && !ctx.tx.isFieldPresent(sfAssetsMaximum) &&
        !ctx.tx.isFieldPresent(sfData))
    {
        JLOG(ctx.j.debug()) << "VaultSet: nothing is being updated.";
        return temMALFORMED;
    }
 
    return tesSUCCESS;
}
 
TER
VaultSet::preclaim(PreclaimContext const& ctx)
{
    auto const vault = ctx.view.read(keylet::vault(ctx.tx[sfVaultID]));
    if (!vault)
        return tecNO_ENTRY;
 
    // Assert that submitter is the Owner.
    if (ctx.tx[sfAccount] != vault->at(sfOwner))
    {
        JLOG(ctx.j.debug()) << "VaultSet: account is not an owner.";
        return tecNO_PERMISSION;
    }
 
    auto const mptIssuanceID = (*vault)[sfShareMPTID];
    auto const sleIssuance = ctx.view.read(keylet::mptIssuance(mptIssuanceID));
    if (!sleIssuance)
    {
        // LCOV_EXCL_START
        JLOG(ctx.j.error()) << "VaultSet: missing issuance of vault shares.";
        return tefINTERNAL;
        // LCOV_EXCL_STOP
    }
 
    if (auto const domain = ctx.tx[~sfDomainID])
    {
        // We can only set domain if private flag was originally set
        if (!vault->isFlag(lsfVaultPrivate))
        {
            JLOG(ctx.j.debug()) << "VaultSet: vault is not private";
            return tecNO_PERMISSION;
        }
 
        if (*domain != beast::zero)
        {
            auto const sleDomain = ctx.view.read(keylet::permissionedDomain(*domain));
            if (!sleDomain)
                return tecOBJECT_NOT_FOUND;
        }
 
        // Sanity check only, this should be enforced by VaultCreate
        if ((sleIssuance->getFlags() & lsfMPTRequireAuth) == 0)
        {
            // LCOV_EXCL_START
            JLOG(ctx.j.error()) << "VaultSet: issuance of vault shares is not private.";
            return tefINTERNAL;
            // LCOV_EXCL_STOP
        }
    }
 
    return tesSUCCESS;
}
 
TER
VaultSet::doApply()
{
    // All return codes in `doApply` must be `tec`, `ter`, or `tes`.
    // As we move checks into `preflight` and `preclaim`,
    // we can consider downgrading them to `tef` or `tem`.
 
    auto const& tx = ctx_.tx;
 
    // Update existing object.
    auto vault = view().peek(keylet::vault(tx[sfVaultID]));
    if (!vault)
        return tefINTERNAL;  // LCOV_EXCL_LINE
 
    auto const vaultAsset = vault->at(sfAsset);
 
    auto const mptIssuanceID = (*vault)[sfShareMPTID];
    auto const sleIssuance = view().peek(keylet::mptIssuance(mptIssuanceID));
    if (!sleIssuance)
    {
        // LCOV_EXCL_START
        JLOG(j_.error()) << "VaultSet: missing issuance of vault shares.";
        return tefINTERNAL;
        // LCOV_EXCL_STOP
    }
 
    // Update mutable flags and fields if given.
    if (tx.isFieldPresent(sfData))
        vault->at(sfData) = tx[sfData];
    if (tx.isFieldPresent(sfAssetsMaximum))
    {
        if (tx[sfAssetsMaximum] != 0 && tx[sfAssetsMaximum] < *vault->at(sfAssetsTotal))
            return tecLIMIT_EXCEEDED;
        vault->at(sfAssetsMaximum) = tx[sfAssetsMaximum];
    }
 
    if (auto const domainId = tx[~sfDomainID]; domainId)
    {
        if (*domainId != beast::zero)
        {
            // In VaultSet::preclaim we enforce that lsfVaultPrivate must have
            // been set in the vault. We currently do not support making such a
            // vault public (i.e. removal of lsfVaultPrivate flag). The
            // sfDomainID flag must be set in the MPTokenIssuance object and can
            // be freely updated.
            sleIssuance->setFieldH256(sfDomainID, *domainId);
        }
        else if (sleIssuance->isFieldPresent(sfDomainID))
        {
            sleIssuance->makeFieldAbsent(sfDomainID);
        }
        view().update(sleIssuance);
    }
 
    // Note, we must update Vault object even if only DomainID is being updated
    // in Issuance object. Otherwise it's really difficult for Vault invariants
    // to verify the operation.
    view().update(vault);
 
    associateAsset(*vault, vaultAsset);
 
    return tesSUCCESS;
}
 
}  // namespace xrpl