mirror of
https://github.com/Xahau/xahaud.git
synced 2026-07-24 15:40:08 +00:00
5ea0c2cbdc
Add AMM functionality: - InstanceCreate - Deposit - Withdraw - Governance - Auctioning - payment engine integration To support this functionality, add: - New RPC method, `amm_info`, to fetch pool and LPT balances - AMM Root Account - trust line for each IOU AMM token - trust line to track Liquidity Provider Tokens (LPT) - `ltAMM` object The `ltAMM` object tracks: - fee votes - auction slot bids - AMM tokens pair - total outstanding tokens balance - `AMMID` to AMM `RootAccountID` mapping Add new classes to facilitate AMM integration into the payment engine. `BookStep` uses these classes to infer if AMM liquidity can be consumed. The AMM formula implementation uses the new Number class added in #4192. IOUAmount and STAmount use Number arithmetic. Add AMM unit tests for all features. AMM requires the following amendments: - featureAMM - fixUniversalNumber - featureFlowCross Notes: - Current trading fee threshold is 1% - AMM currency is generated by: 0x03 + 152 bits of sha256{cur1, cur2} - Current max AMM Offers is 30 --------- Co-authored-by: Howard Hinnant <howard.hinnant@gmail.com>
60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
//------------------------------------------------------------------------------
|
|
/*
|
|
This file is part of rippled: https://github.com/ripple/rippled
|
|
Copyright (c) 2023 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.
|
|
*/
|
|
//==============================================================================
|
|
|
|
#include <ripple/protocol/QualityFunction.h>
|
|
|
|
#include <ripple/protocol/Quality.h>
|
|
|
|
namespace ripple {
|
|
|
|
QualityFunction::QualityFunction(
|
|
Quality const& quality,
|
|
QualityFunction::CLOBLikeTag)
|
|
: m_(0), b_(0), quality_(quality)
|
|
{
|
|
if (quality.rate() <= beast::zero)
|
|
Throw<std::runtime_error>("QualityFunction quality rate is 0.");
|
|
b_ = 1 / quality.rate();
|
|
}
|
|
|
|
void
|
|
QualityFunction::combine(QualityFunction const& qf)
|
|
{
|
|
m_ += b_ * qf.m_;
|
|
b_ *= qf.b_;
|
|
if (m_ != 0)
|
|
quality_ = std::nullopt;
|
|
}
|
|
|
|
std::optional<Number>
|
|
QualityFunction::outFromAvgQ(Quality const& quality)
|
|
{
|
|
if (m_ != 0 && quality.rate() != beast::zero)
|
|
{
|
|
saveNumberRoundMode rm(Number::setround(Number::rounding_mode::upward));
|
|
auto const out = (1 / quality.rate() - b_) / m_;
|
|
if (out <= 0)
|
|
return std::nullopt;
|
|
return out;
|
|
}
|
|
return std::nullopt;
|
|
}
|
|
|
|
} // namespace ripple
|