AMM.h

#pragma once
 
#include <test/jtx/Account.h>
#include <test/jtx/Env.h>
#include <test/jtx/multisign.h>
#include <test/jtx/seq.h>
#include <test/jtx/ter.h>
 
#include <xrpld/rpc/GRPCHandlers.h>
 
#include <xrpl/json/json_value.h>
#include <xrpl/protocol/STAmount.h>
#include <xrpl/protocol/TxFlags.h>
 
namespace xrpl {
namespace test {
namespace jtx {
 
class LPToken
{
    IOUAmount const tokens_;
 
public:
    LPToken(std::uint64_t tokens) : tokens_(tokens)
    {
    }
    LPToken(IOUAmount tokens) : tokens_(tokens)
    {
    }
    IOUAmount const&
    tokens() const
    {
        return tokens_;
    }
    STAmount
    tokens(Issue const& ammIssue) const
    {
        return STAmount{tokens_, ammIssue};
    }
};
 
struct CreateArg
{
    bool log = false;
    std::uint16_t tfee = 0;
    std::uint32_t fee = 0;
    std::optional<std::uint32_t> flags = std::nullopt;
    std::optional<jtx::seq> seq = std::nullopt;
    std::optional<jtx::msig> ms = std::nullopt;
    std::optional<ter> err = std::nullopt;
    bool close = true;
};
 
struct DepositArg
{
    std::optional<Account> account = std::nullopt;
    std::optional<LPToken> tokens = std::nullopt;
    std::optional<STAmount> asset1In = std::nullopt;
    std::optional<STAmount> asset2In = std::nullopt;
    std::optional<STAmount> maxEP = std::nullopt;
    std::optional<std::uint32_t> flags = std::nullopt;
    std::optional<std::pair<Issue, Issue>> assets = std::nullopt;
    std::optional<jtx::seq> seq = std::nullopt;
    std::optional<std::uint16_t> tfee = std::nullopt;
    std::optional<ter> err = std::nullopt;
};
 
struct WithdrawArg
{
    std::optional<Account> account = std::nullopt;
    std::optional<LPToken> tokens = std::nullopt;
    std::optional<STAmount> asset1Out = std::nullopt;
    std::optional<STAmount> asset2Out = std::nullopt;
    std::optional<IOUAmount> maxEP = std::nullopt;
    std::optional<std::uint32_t> flags = std::nullopt;
    std::optional<std::pair<Issue, Issue>> assets = std::nullopt;
    std::optional<jtx::seq> seq = std::nullopt;
    std::optional<ter> err = std::nullopt;
};
 
struct VoteArg
{
    std::optional<Account> account = std::nullopt;
    std::uint32_t tfee = 0;
    std::optional<std::uint32_t> flags = std::nullopt;
    std::optional<jtx::seq> seq = std::nullopt;
    std::optional<std::pair<Issue, Issue>> assets = std::nullopt;
    std::optional<ter> err = std::nullopt;
};
 
struct BidArg
{
    std::optional<Account> account = std::nullopt;
    std::optional<std::variant<int, IOUAmount, STAmount>> bidMin = std::nullopt;
    std::optional<std::variant<int, IOUAmount, STAmount>> bidMax = std::nullopt;
    std::vector<Account> authAccounts = {};
    std::optional<std::uint32_t> flags = std::nullopt;
    std::optional<std::pair<Issue, Issue>> assets = std::nullopt;
};
 
class AMM
{
    Env& env_;
    Account const creatorAccount_;
    STAmount const asset1_;
    STAmount const asset2_;
    uint256 const ammID_;
    bool log_;
    bool doClose_;
    // Predict next purchase price
    IOUAmount lastPurchasePrice_;
    std::optional<IOUAmount> bidMin_;
    std::optional<IOUAmount> bidMax_;
    // Multi-signature
    std::optional<msig> const msig_;
    // Transaction fee
    std::uint32_t const fee_;
    AccountID const ammAccount_;
    Issue const lptIssue_;
    IOUAmount const initialLPTokens_;
 
public:
    AMM(Env& env,
        Account const& account,
        STAmount const& asset1,
        STAmount const& asset2,
        bool log = false,
        std::uint16_t tfee = 0,
        std::uint32_t fee = 0,
        std::optional<std::uint32_t> flags = std::nullopt,
        std::optional<jtx::seq> seq = std::nullopt,
        std::optional<jtx::msig> ms = std::nullopt,
        std::optional<ter> const& ter = std::nullopt,
        bool close = true);
    AMM(Env& env,
        Account const& account,
        STAmount const& asset1,
        STAmount const& asset2,
        ter const& ter,
        bool log = false,
        bool close = true);
    AMM(Env& env, Account const& account, STAmount const& asset1, STAmount const& asset2, CreateArg const& arg);
 
    Json::Value
    ammRpcInfo(
        std::optional<AccountID> const& account = std::nullopt,
        std::optional<std::string> const& ledgerIndex = std::nullopt,
        std::optional<Issue> issue1 = std::nullopt,
        std::optional<Issue> issue2 = std::nullopt,
        std::optional<AccountID> const& ammAccount = std::nullopt,
        bool ignoreParams = false,
        unsigned apiVersion = RPC::apiInvalidVersion) const;
 
    [[nodiscard]] bool
    expectBalances(
        STAmount const& asset1,
        STAmount const& asset2,
        IOUAmount const& lpt,
        std::optional<AccountID> const& account = std::nullopt) const;
 
    std::tuple<STAmount, STAmount, STAmount>
    balances(Issue const& issue1, Issue const& issue2, std::optional<AccountID> const& account = std::nullopt) const;
 
    std::tuple<STAmount, STAmount, STAmount>
    balances(std::optional<AccountID> const& account = std::nullopt) const
    {
        return balances(asset1_.get<Issue>(), asset2_.get<Issue>(), account);
    }
 
    [[nodiscard]] bool
    expectLPTokens(AccountID const& account, IOUAmount const& tokens) const;
 
    [[nodiscard]] bool
    expectAuctionSlot(std::uint32_t fee, std::optional<std::uint8_t> timeSlot, IOUAmount expectedPrice) const;
 
    [[nodiscard]] bool
    expectAuctionSlot(std::vector<AccountID> const& authAccount) const;
 
    [[nodiscard]] bool
    expectTradingFee(std::uint16_t fee) const;
 
    [[nodiscard]] bool
    expectAmmRpcInfo(
        STAmount const& asset1,
        STAmount const& asset2,
        IOUAmount const& balance,
        std::optional<AccountID> const& account = std::nullopt,
        std::optional<std::string> const& ledger_index = std::nullopt,
        std::optional<AccountID> const& ammAccount = std::nullopt) const;
 
    [[nodiscard]] bool
    ammExists() const;
 
    IOUAmount
    deposit(
        std::optional<Account> const& account,
        LPToken tokens,
        std::optional<STAmount> const& asset1InDetails = std::nullopt,
        std::optional<std::uint32_t> const& flags = std::nullopt,
        std::optional<ter> const& ter = std::nullopt);
 
    IOUAmount
    deposit(
        std::optional<Account> const& account,
        STAmount const& asset1InDetails,
        std::optional<STAmount> const& asset2InAmount = std::nullopt,
        std::optional<STAmount> const& maxEP = std::nullopt,
        std::optional<std::uint32_t> const& flags = std::nullopt,
        std::optional<ter> const& ter = std::nullopt);
 
    IOUAmount
    deposit(
        std::optional<Account> const& account,
        std::optional<LPToken> tokens,
        std::optional<STAmount> const& asset1In,
        std::optional<STAmount> const& asset2In,
        std::optional<STAmount> const& maxEP,
        std::optional<std::uint32_t> const& flags,
        std::optional<std::pair<Issue, Issue>> const& assets,
        std::optional<jtx::seq> const& seq,
        std::optional<std::uint16_t> const& tfee = std::nullopt,
        std::optional<ter> const& ter = std::nullopt);
 
    IOUAmount
    deposit(DepositArg const& arg);
 
    IOUAmount
    withdraw(
        std::optional<Account> const& account,
        std::optional<LPToken> const& tokens,
        std::optional<STAmount> const& asset1OutDetails = std::nullopt,
        std::optional<std::uint32_t> const& flags = std::nullopt,
        std::optional<ter> const& ter = std::nullopt);
 
    IOUAmount
    withdrawAll(
        std::optional<Account> const& account,
        std::optional<STAmount> const& asset1OutDetails = std::nullopt,
        std::optional<ter> const& ter = std::nullopt)
    {
        return withdraw(
            account, std::nullopt, asset1OutDetails, asset1OutDetails ? tfOneAssetWithdrawAll : tfWithdrawAll, ter);
    }
 
    IOUAmount
    withdraw(
        std::optional<Account> const& account,
        STAmount const& asset1Out,
        std::optional<STAmount> const& asset2Out = std::nullopt,
        std::optional<IOUAmount> const& maxEP = std::nullopt,
        std::optional<ter> const& ter = std::nullopt);
 
    IOUAmount
    withdraw(
        std::optional<Account> const& account,
        std::optional<LPToken> const& tokens,
        std::optional<STAmount> const& asset1Out,
        std::optional<STAmount> const& asset2Out,
        std::optional<IOUAmount> const& maxEP,
        std::optional<std::uint32_t> const& flags,
        std::optional<std::pair<Issue, Issue>> const& assets,
        std::optional<jtx::seq> const& seq,
        std::optional<ter> const& ter = std::nullopt);
 
    IOUAmount
    withdraw(WithdrawArg const& arg);
 
    void
    vote(
        std::optional<Account> const& account,
        std::uint32_t feeVal,
        std::optional<std::uint32_t> const& flags = std::nullopt,
        std::optional<jtx::seq> const& seq = std::nullopt,
        std::optional<std::pair<Issue, Issue>> const& assets = std::nullopt,
        std::optional<ter> const& ter = std::nullopt);
 
    void
    vote(VoteArg const& arg);
 
    Json::Value
    bid(BidArg const& arg);
 
    AccountID const&
    ammAccount() const
    {
        return ammAccount_;
    }
 
    Issue
    lptIssue() const
    {
        return lptIssue_;
    }
 
    IOUAmount
    tokens() const
    {
        return initialLPTokens_;
    }
 
    IOUAmount
    getLPTokensBalance(std::optional<AccountID> const& account = std::nullopt) const;
 
    friend std::ostream&
    operator<<(std::ostream& s, AMM const& amm)
    {
        if (auto const res = amm.ammRpcInfo())
            s << res.toStyledString();
        return s;
    }
 
    std::string
    operator[](AccountID const& lp)
    {
        return ammRpcInfo(lp).toStyledString();
    }
 
    Json::Value
    operator()(AccountID const& lp)
    {
        return ammRpcInfo(lp);
    }
 
    void
    ammDelete(AccountID const& deleter, std::optional<ter> const& ter = std::nullopt);
 
    void
    setClose(bool close)
    {
        doClose_ = close;
    }
 
    uint256
    ammID() const
    {
        return ammID_;
    }
 
    void
    setTokens(Json::Value& jv, std::optional<std::pair<Issue, Issue>> const& assets = std::nullopt);
 
private:
    AccountID
    create(
        std::uint32_t tfee = 0,
        std::optional<std::uint32_t> const& flags = std::nullopt,
        std::optional<jtx::seq> const& seq = std::nullopt,
        std::optional<ter> const& ter = std::nullopt);
 
    IOUAmount
    deposit(
        std::optional<Account> const& account,
        Json::Value& jv,
        std::optional<std::pair<Issue, Issue>> const& assets = std::nullopt,
        std::optional<jtx::seq> const& seq = std::nullopt,
        std::optional<ter> const& ter = std::nullopt);
 
    IOUAmount
    withdraw(
        std::optional<Account> const& account,
        Json::Value& jv,
        std::optional<jtx::seq> const& seq,
        std::optional<std::pair<Issue, Issue>> const& assets = std::nullopt,
        std::optional<ter> const& ter = std::nullopt);
 
    void
    log(bool log)
    {
        log_ = log;
    }
 
    [[nodiscard]] bool
    expectAmmInfo(STAmount const& asset1, STAmount const& asset2, IOUAmount const& balance, Json::Value const& jv)
        const;
 
    void
    submit(Json::Value const& jv, std::optional<jtx::seq> const& seq, std::optional<ter> const& ter);
 
    [[nodiscard]] bool
    expectAuctionSlot(auto&& cb) const;
 
    IOUAmount
    initialTokens();
};
 
namespace amm {
Json::Value
trust(AccountID const& account, STAmount const& amount, std::uint32_t flags = 0);
Json::Value
pay(Account const& account, AccountID const& to, STAmount const& amount);
 
Json::Value
ammClawback(
    Account const& issuer,
    Account const& holder,
    Issue const& asset,
    Issue const& asset2,
    std::optional<STAmount> const& amount);
}  // namespace amm
 
}  // namespace jtx
}  // namespace test
}  // namespace xrpl