Oracle.h

//------------------------------------------------------------------------------
/*
    This file is part of rippled: https://github.com/ripple/rippled
    Copyright (c) 2012, 2013 Ripple Labs Inc.
 
    Permission to use, copy, modify, and/or distribute this software for any
    purpose  with  or without fee is hereby granted, provided that the above
    copyright notice and this permission notice appear in all copies.
 
    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================
 
#ifndef RIPPLE_TEST_JTX_ORACLE_H_INCLUDED
#define RIPPLE_TEST_JTX_ORACLE_H_INCLUDED
 
#include <test/jtx.h>
 
#include <date/date.h>
 
namespace ripple {
namespace test {
namespace jtx {
namespace oracle {
 
using AnyValue = std::variant<std::string, double, Json::Int, Json::UInt>;
using OraclesData =
    std::vector<std::pair<std::optional<Account>, std::optional<AnyValue>>>;
 
// Special string value, which is converted to unquoted string in the string
// passed to rpc.
constexpr char const* NoneTag = "%None%";
constexpr char const* UnquotedNone = "None";
constexpr char const* NonePattern = "\"%None%\"";
 
std::uint32_t
asUInt(AnyValue const& v);
 
bool
validDocumentID(AnyValue const& v);
 
void
toJson(Json::Value& jv, AnyValue const& v);
 
void
toJsonHex(Json::Value& jv, AnyValue const& v);
 
// base asset, quote asset, price, scale
using DataSeries = std::vector<std::tuple<
    std::string,
    std::string,
    std::optional<std::uint32_t>,
    std::optional<std::uint8_t>>>;
 
// Typical defaults for Create
struct CreateArg
{
    std::optional<AccountID> owner = std::nullopt;
    std::optional<AnyValue> documentID = 1;
    DataSeries series = {{"XRP", "USD", 740, 1}};
    std::optional<AnyValue> assetClass = "currency";
    std::optional<AnyValue> provider = "provider";
    std::optional<AnyValue> uri = "URI";
    std::optional<AnyValue> lastUpdateTime = std::nullopt;
    std::uint32_t flags = 0;
    std::optional<jtx::msig> msig = std::nullopt;
    std::optional<jtx::seq> seq = std::nullopt;
    int fee = 10;
    std::optional<ter> err = std::nullopt;
    bool close = false;
};
 
// Typical defaults for Update
struct UpdateArg
{
    std::optional<AccountID> owner = std::nullopt;
    std::optional<AnyValue> documentID = std::nullopt;
    DataSeries series = {};
    std::optional<AnyValue> assetClass = std::nullopt;
    std::optional<AnyValue> provider = std::nullopt;
    std::optional<AnyValue> uri = "URI";
    std::optional<AnyValue> lastUpdateTime = std::nullopt;
    std::uint32_t flags = 0;
    std::optional<jtx::msig> msig = std::nullopt;
    std::optional<jtx::seq> seq = std::nullopt;
    int fee = 10;
    std::optional<ter> err = std::nullopt;
};
 
struct RemoveArg
{
    std::optional<AccountID> const& owner = std::nullopt;
    std::optional<AnyValue> const& documentID = std::nullopt;
    std::uint32_t flags = 0;
    std::optional<jtx::msig> const& msig = std::nullopt;
    std::optional<jtx::seq> seq = std::nullopt;
    int fee = 10;
    std::optional<ter> const& err = std::nullopt;
};
 
// Simulate testStartTime as 10'000s from Ripple epoch time to make
// LastUpdateTime validation to work and to make unit-test consistent.
// The value doesn't matter much, it has to be greater
// than maxLastUpdateTimeDelta in order to pass LastUpdateTime
// validation {close-maxLastUpdateTimeDelta,close+maxLastUpdateTimeDelta}.
constexpr static std::chrono::seconds testStartTime =
    epoch_offset + std::chrono::seconds(10'000);
 
class Oracle
{
private:
    // Global fee if not 0
    static inline std::uint32_t fee = 0;
    Env& env_;
    AccountID owner_;
    std::uint32_t documentID_;
 
private:
    void
    submit(
        Json::Value const& jv,
        std::optional<jtx::msig> const& msig,
        std::optional<jtx::seq> const& seq,
        std::optional<ter> const& err);
 
public:
    Oracle(Env& env, CreateArg const& arg, bool submit = true);
 
    void
    remove(RemoveArg const& arg);
 
    void
    set(CreateArg const& arg);
    void
    set(UpdateArg const& arg);
 
    static Json::Value
    aggregatePrice(
        Env& env,
        std::optional<AnyValue> const& baseAsset,
        std::optional<AnyValue> const& quoteAsset,
        std::optional<OraclesData> const& oracles = std::nullopt,
        std::optional<AnyValue> const& trim = std::nullopt,
        std::optional<AnyValue> const& timeTreshold = std::nullopt);
 
    std::uint32_t
    documentID() const
    {
        return documentID_;
    }
 
    [[nodiscard]] bool
    exists() const
    {
        return exists(env_, owner_, documentID_);
    }
 
    [[nodiscard]] static bool
    exists(Env& env, AccountID const& account, std::uint32_t documentID);
 
    [[nodiscard]] bool
    expectPrice(DataSeries const& pricess) const;
 
    [[nodiscard]] bool
    expectLastUpdateTime(std::uint32_t lastUpdateTime) const;
 
    static Json::Value
    ledgerEntry(
        Env& env,
        std::optional<std::variant<AccountID, std::string>> const& account,
        std::optional<AnyValue> const& documentID,
        std::optional<std::string> const& index = std::nullopt);
 
    Json::Value
    ledgerEntry(std::optional<std::string> const& index = std::nullopt) const
    {
        return Oracle::ledgerEntry(env_, owner_, documentID_, index);
    }
 
    static void
    setFee(std::uint32_t f)
    {
        fee = f;
    }
 
    friend std::ostream&
    operator<<(std::ostream& strm, Oracle const& oracle)
    {
        strm << oracle.ledgerEntry().toStyledString();
        return strm;
    }
};
 
}  // namespace oracle
}  // namespace jtx
}  // namespace test
}  // namespace ripple
 
#endif  // RIPPLE_TEST_JTX_ORACLE_H_INCLUDED