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Introduce AMM support (XLS-30d): (#4294)

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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>
This commit is contained in:
Gregory Tsipenyuk
2023-07-12 13:52:50 -04:00
committed by tequ
parent b7a29cad94
commit 8dbc6db079
108 changed files with 19083 additions and 1717 deletions
Download Patch File Download Diff File Expand all files Collapse all files

41
src/test/app/Offer_test.cpp
View File

@@ -22,6 +22,7 @@
#include <ripple/protocol/jss.h>
#include <test/jtx.h>
#include <test/jtx/PathSet.h>
#include <test/jtx/TestHelpers.h>
#include <test/jtx/WSClient.h>
namespace ripple {
@@ -41,42 +42,6 @@ class Offer_test : public beast::unit_test::suite
return env.current()->info().parentCloseTime.time_since_epoch().count();
}
static auto
xrpMinusFee(jtx::Env const& env, std::int64_t xrpAmount)
-> jtx::PrettyAmount
{
using namespace jtx;
auto feeDrops = env.current()->fees().base;
return drops(dropsPerXRP * xrpAmount - feeDrops);
}
static auto
ledgerEntryState(
jtx::Env& env,
jtx::Account const& acct_a,
jtx::Account const& acct_b,
std::string const& currency)
{
Json::Value jvParams;
jvParams[jss::ledger_index] = "current";
jvParams[jss::ripple_state][jss::currency] = currency;
jvParams[jss::ripple_state][jss::accounts] = Json::arrayValue;
jvParams[jss::ripple_state][jss::accounts].append(acct_a.human());
jvParams[jss::ripple_state][jss::accounts].append(acct_b.human());
return env.rpc(
"json", "ledger_entry", to_string(jvParams))[jss::result];
}
static auto
ledgerEntryRoot(jtx::Env& env, jtx::Account const& acct)
{
Json::Value jvParams;
jvParams[jss::ledger_index] = "current";
jvParams[jss::account_root] = acct.human();
return env.rpc(
"json", "ledger_entry", to_string(jvParams))[jss::result];
}
static auto
ledgerEntryOffer(
jtx::Env& env,
@@ -2718,7 +2683,7 @@ public:
env.close();
// The scenario:
// o alice has USD but wants XPR.
// o alice has USD but wants XRP.
// o bob has XRP but wants EUR.
// o carol has EUR but wants USD.
// Note that carol's offer must come last. If carol's offer is placed
@@ -3317,7 +3282,7 @@ public:
env.fund(XRP(2) + reserve(env, 3) + (fee * 3), ova, pat, qae);
env.close();
// o ova has USD but wants XPR.
// o ova has USD but wants XRP.
// o pat has XRP but wants EUR.
// o qae has EUR but wants USD.
env(trust(ova, USD(200)));