コード例 #1
0
ファイル: AccountLines.cpp プロジェクト: blockc/rippled
// {
//   account: <account>|<account_public_key>
//   ledger_hash : <ledger>
//   ledger_index : <ledger_index>
//   limit: integer                 // optional
//   marker: opaque                 // optional, resume previous query
// }
Json::Value doAccountLines (RPC::Context& context)
{
    auto const& params (context.params);
    if (! params.isMember (jss::account))
        return RPC::missing_field_error (jss::account);

    std::shared_ptr<ReadView const> ledger;
    auto result = RPC::lookupLedger (ledger, context);
    if (! ledger)
        return result;

    std::string strIdent (params[jss::account].asString ());
    AccountID accountID;

    // Intentional assignment in if.  Extra parentheses silence warning.
    if ((result = RPC::accountFromString (accountID, strIdent)))
        return result;

    if (! ledger->exists(keylet::account (accountID)))
        return rpcError (rpcACT_NOT_FOUND);

    std::string strPeer;
    if (params.isMember (jss::peer))
        strPeer = params[jss::peer].asString ();
    auto hasPeer = ! strPeer.empty ();

    AccountID raPeerAccount;
    if (hasPeer)
    {
        // Intentional assignment in if.  Extra parentheses silence warning.
        if ((result = RPC::accountFromString (raPeerAccount, strPeer)))
            return result;
    }

    unsigned int limit;
    if (auto err = readLimitField(limit, RPC::Tuning::accountLines, context))
        return *err;

    Json::Value& jsonLines (result[jss::lines] = Json::arrayValue);
    VisitData visitData = {{}, accountID, hasPeer, raPeerAccount};
    unsigned int reserve (limit);
    uint256 startAfter;
    std::uint64_t startHint;

    if (params.isMember (jss::marker))
    {
        // We have a start point. Use limit - 1 from the result and use the
        // very last one for the resume.
        Json::Value const& marker (params[jss::marker]);

        if (! marker.isString ())
            return RPC::expected_field_error (jss::marker, "string");

        startAfter.SetHex (marker.asString ());
        auto const sleLine = ledger->read({ltRIPPLE_STATE, startAfter});

        if (! sleLine)
            return rpcError (rpcINVALID_PARAMS);

        if (sleLine->getFieldAmount (sfLowLimit).getIssuer () == accountID)
            startHint = sleLine->getFieldU64 (sfLowNode);
        else if (sleLine->getFieldAmount (sfHighLimit).getIssuer () == accountID)
            startHint = sleLine->getFieldU64 (sfHighNode);
        else
            return rpcError (rpcINVALID_PARAMS);

        // Caller provided the first line (startAfter), add it as first result
        auto const line = RippleState::makeItem (accountID, sleLine);
        if (line == nullptr)
            return rpcError (rpcINVALID_PARAMS);

        addLine (jsonLines, *line);
        visitData.items.reserve (reserve);
    }
    else
    {
        startHint = 0;
        // We have no start point, limit should be one higher than requested.
        visitData.items.reserve (++reserve);
    }

    {
        if (! forEachItemAfter(*ledger, accountID,
                startAfter, startHint, reserve,
            [&visitData](std::shared_ptr<SLE const> const& sleCur)
            {
                auto const line =
                    RippleState::makeItem (visitData.accountID, sleCur);
                if (line != nullptr &&
                    (! visitData.hasPeer ||
                     visitData.raPeerAccount == line->getAccountIDPeer ()))
                {
                    visitData.items.emplace_back (line);
                    return true;
                }

                return false;
            }))
        {
            return rpcError (rpcINVALID_PARAMS);
        }
    }

    if (visitData.items.size () == reserve)
    {
        result[jss::limit] = limit;

        RippleState::pointer line (visitData.items.back ());
        result[jss::marker] = to_string (line->key());
        visitData.items.pop_back ();
    }

    result[jss::account] = context.app.accountIDCache().toBase58 (accountID);

    for (auto const& item : visitData.items)
        addLine (jsonLines, *item.get ());

    context.loadType = Resource::feeMediumBurdenRPC;
    return result;
}
コード例 #2
0
ファイル: AccountLines.cpp プロジェクト: xdv/divvyd
// {
//   account: <account>|<account_public_key>
//   account_index: <number>        // optional, defaults to 0.
//   ledger_hash : <ledger>
//   ledger_index : <ledger_index>
//   limit: integer                 // optional
//   marker: opaque                 // optional, resume previous query
// }
Json::Value doAccountLines (RPC::Context& context)
{
    auto const& params (context.params);
    if (! params.isMember (jss::account))
        return RPC::missing_field_error (jss::account);

    Ledger::pointer ledger;
    Json::Value result (RPC::lookupLedger (params, ledger, context.netOps));
    if (! ledger)
        return result;

    std::string strIdent (params[jss::account].asString ());
    bool bIndex (params.isMember (jss::account_index));
    int iIndex (bIndex ? params[jss::account_index].asUInt () : 0);
    DivvyAddress divvyAddress;

    auto jv = RPC::accountFromString (
        divvyAddress, bIndex, strIdent, iIndex, false);
    if (! jv.empty ())
    {
        for (auto it = jv.begin (); it != jv.end (); ++it)
            result[it.memberName ()] = it.key ();

        return result;
    }

    if (! ledger->exists(getAccountRootIndex(
            divvyAddress.getAccountID())))
        return rpcError (rpcACT_NOT_FOUND);

    std::string strPeer (params.isMember (jss::peer)
        ? params[jss::peer].asString () : "");
    bool bPeerIndex (params.isMember (jss::peer_index));
    int iPeerIndex (bIndex ? params[jss::peer_index].asUInt () : 0);

    DivvyAddress divvyAddressPeer;

    if (! strPeer.empty ())
    {
        result[jss::peer] = divvyAddress.humanAccountID ();

        if (bPeerIndex)
            result[jss::peer_index] = iPeerIndex;

        result = RPC::accountFromString (
            divvyAddressPeer, bPeerIndex, strPeer, iPeerIndex, false);

        if (! result.empty ())
            return result;
    }

    AccountID raPeerAccount;
    if (divvyAddressPeer.isValid ())
        raPeerAccount = divvyAddressPeer.getAccountID ();

    unsigned int limit;
    if (params.isMember (jss::limit))
    {
        auto const& jvLimit (params[jss::limit]);
        if (! jvLimit.isIntegral ())
            return RPC::expected_field_error (jss::limit, "unsigned integer");

        limit = jvLimit.isUInt () ? jvLimit.asUInt () :
            std::max (0, jvLimit.asInt ());

        if (context.role != Role::ADMIN)
        {
            limit = std::max (RPC::Tuning::minLinesPerRequest,
                std::min (limit, RPC::Tuning::maxLinesPerRequest));
        }
    }
    else
    {
        limit = RPC::Tuning::defaultLinesPerRequest;
    }

    Json::Value& jsonLines (result[jss::lines] = Json::arrayValue);
    AccountID const& raAccount(divvyAddress.getAccountID ());
    VisitData visitData = { {}, raAccount, divvyAddressPeer, raPeerAccount };
    unsigned int reserve (limit);
    uint256 startAfter;
    std::uint64_t startHint;

    if (params.isMember (jss::marker))
    {
        // We have a start point. Use limit - 1 from the result and use the
        // very last one for the resume.
        Json::Value const& marker (params[jss::marker]);

        if (! marker.isString ())
            return RPC::expected_field_error (jss::marker, "string");

        startAfter.SetHex (marker.asString ());
        auto const sleLine = fetch(*ledger, startAfter,
            getApp().getSLECache());

        if (sleLine == nullptr || sleLine->getType () != ltRIPPLE_STATE)
            return rpcError (rpcINVALID_PARAMS);

        if (sleLine->getFieldAmount (sfLowLimit).getIssuer () == raAccount)
            startHint = sleLine->getFieldU64 (sfLowNode);
        else if (sleLine->getFieldAmount (sfHighLimit).getIssuer () == raAccount)
            startHint = sleLine->getFieldU64 (sfHighNode);
        else
            return rpcError (rpcINVALID_PARAMS);

        // Caller provided the first line (startAfter), add it as first result
        auto const line = DivvyState::makeItem (raAccount, sleLine);
        if (line == nullptr)
            return rpcError (rpcINVALID_PARAMS);

        addLine (jsonLines, *line);
        visitData.items.reserve (reserve);
    }
    else
    {
        startHint = 0;
        // We have no start point, limit should be one higher than requested.
        visitData.items.reserve (++reserve);
    }

    if (! forEachItemAfter(*ledger, raAccount, getApp().getSLECache(),
            startAfter, startHint, reserve,
        [&visitData](std::shared_ptr<SLE const> const& sleCur)
        {
            auto const line =
                DivvyState::makeItem (visitData.accountID, sleCur);
            if (line != nullptr &&
                (! visitData.divvyAddressPeer.isValid () ||
                visitData.raPeerAccount == line->getAccountIDPeer ()))
            {
                visitData.items.emplace_back (line);
                return true;
            }

            return false;
        }))
    {
        return rpcError (rpcINVALID_PARAMS);
    }

    if (visitData.items.size () == reserve)
    {
        result[jss::limit] = limit;

        DivvyState::pointer line (visitData.items.back ());
        result[jss::marker] = to_string (line->key());
        visitData.items.pop_back ();
    }

    result[jss::account] = divvyAddress.humanAccountID ();

    for (auto const& item : visitData.items)
        addLine (jsonLines, *item.get ());

    context.loadType = Resource::feeMediumBurdenRPC;
    return result;
}