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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| //------------------------------------------------------------------------------ | ||
| /* | ||
| This file is part of rippled: https://github.com/ripple/rippled | ||
| Copyright (c) 2022 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_APP_MISC_AMM_H_INLCUDED | ||
| #define RIPPLE_APP_MISC_AMM_H_INLCUDED | ||
|
|
||
| #include <ripple/beast/utility/Journal.h> | ||
| #include <ripple/protocol/Quality.h> | ||
| #include <ripple/protocol/STAmount.h> | ||
| #include <ripple/protocol/STArray.h> | ||
| #include <ripple/protocol/STLedgerEntry.h> | ||
| #include <ripple/protocol/TER.h> | ||
| #include <ripple/protocol/TxFlags.h> | ||
| #include <ripple/protocol/digest.h> | ||
|
|
||
| namespace ripple { | ||
|
|
||
| class ReadView; | ||
| class ApplyView; | ||
| class Sandbox; | ||
| class STLedgerEntry; | ||
| class NetClock; | ||
| class STObject; | ||
| class Rules; | ||
|
|
||
| /** Calculate AMM account ID. | ||
| */ | ||
| template <typename... Args> | ||
| AccountID | ||
| calcAccountID(Args const&... args) | ||
| { | ||
| ripesha_hasher rsh; | ||
| auto hash = sha512Half(args...); | ||
| rsh(hash.data(), hash.size()); | ||
| return AccountID{static_cast<ripesha_hasher::result_type>(rsh)}; | ||
| } | ||
|
|
||
| /** Calculate AMM group hash. The ltAMM object | ||
| * contains all AMM's for the same issues. | ||
| */ | ||
| uint256 | ||
| calcAMMGroupHash(Issue const& issue1, Issue const& issue2); | ||
|
|
||
| /** Calculate Liquidity Provider Token (LPT) Currency. | ||
| */ | ||
| Currency | ||
| calcLPTCurrency(AccountID const& ammAccountID); | ||
|
|
||
| /** Calculate LPT Issue. | ||
| */ | ||
| Issue | ||
| calcLPTIssue(AccountID const& ammAccountID); | ||
|
|
||
| /** Get AMM pool balances. | ||
| */ | ||
| std::pair<STAmount, STAmount> | ||
| ammPoolHolds( | ||
| ReadView const& view, | ||
| AccountID const& ammAccountID, | ||
| Issue const& issue1, | ||
| Issue const& issue2, | ||
| beast::Journal const j); | ||
|
|
||
| /** Get AMM pool and LP token balances. If both optIssue are | ||
| * provided then they are used as the AMM token pair issues. | ||
| * Otherwise the missing issues are fetched from ammSle. | ||
| */ | ||
| std::tuple<STAmount, STAmount, STAmount> | ||
| ammHolds( | ||
| ReadView const& view, | ||
| SLE const& ammSle, | ||
| std::optional<Issue> const& optIssue1, | ||
| std::optional<Issue> const& optIssue2, | ||
| beast::Journal const j); | ||
|
|
||
| /** Get the balance of LP tokens. | ||
| */ | ||
| STAmount | ||
| lpHolds( | ||
| ReadView const& view, | ||
| AccountID const& ammAccountID, | ||
| AccountID const& lpAccount, | ||
| beast::Journal const j); | ||
|
|
||
| /** Validate the amount. | ||
| * If zero is false and amount is beast::zero then invalid amount. | ||
| * Return error code if invalid amount. | ||
| */ | ||
| std::optional<TEMcodes> | ||
| invalidAmount(std::optional<STAmount> const& a, bool zero = false); | ||
|
|
||
| /** Check if the line is frozen from the issuer. | ||
| */ | ||
| bool | ||
| isFrozen(ReadView const& view, std::optional<STAmount> const& a); | ||
|
|
||
| /** Get AMM SLE and verify that the AMM account exists. | ||
| * Return null if SLE not found or AMM account doesn't exist. | ||
| */ | ||
| std::shared_ptr<STLedgerEntry const> | ||
| getAMMSle(ReadView const& view, uint256 ammID); | ||
|
|
||
| std::shared_ptr<STLedgerEntry> | ||
| getAMMSle(Sandbox& view, uint256 ammID); | ||
|
|
||
| /** Check if the account requires authorization. | ||
| * Return true if issuer's account, account, and trust line exist | ||
| * and the account requires authorization. | ||
| */ | ||
| bool | ||
| requireAuth(ReadView const& view, Issue const& issue, AccountID const& account); | ||
|
|
||
| /** Get AMM trading fee for the given account. The fee is discounted | ||
| * if the account is the auction slot owner or one of the slot's authorized | ||
| * accounts. | ||
| */ | ||
| std::uint16_t | ||
| getTradingFee(SLE const& ammSle, AccountID const& account); | ||
|
|
||
| /** Get Issue from sfToken1/sfToken2 fields. | ||
| */ | ||
| std::pair<Issue, Issue> | ||
| getTokensIssue(SLE const& ammSle); | ||
|
|
||
| /** Send w/o fees. Either from or to must be AMM account. | ||
| */ | ||
| TER | ||
| ammSend( | ||
| ApplyView& view, | ||
| AccountID const& from, | ||
| AccountID const& to, | ||
| STAmount const& amount, | ||
| beast::Journal j); | ||
|
|
||
| /** Get time slot of the auction slot. | ||
| */ | ||
| std::uint16_t | ||
| timeSlot(NetClock::time_point const& clock, STObject const& auctionSlot); | ||
|
|
||
| bool | ||
| ammRequiredAmendments(Rules const&); | ||
|
|
||
| } // namespace ripple | ||
|
|
||
| #endif // RIPPLE_APP_MISC_AMM_H_INLCUDED |
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