Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Precompile changes to support custom oracle #186

Merged
merged 2 commits into from
Apr 5, 2024
Merged

Precompile changes to support custom oracle #186

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
80cf72f
add support for custom oracle
0xshinobii Apr 4, 2024
fd72b1c
add log, clean comment
atvanguard Apr 5, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
43 changes: 37 additions & 6 deletions precompile/contracts/bibliophile/oracle.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8,14 +8,17 @@ import (

"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/log"
)

var (
RED_STONE_VALUES_MAPPING_STORAGE_LOCATION = common.HexToHash("0x4dd0c77efa6f6d590c97573d8c70b714546e7311202ff7c11c484cc841d91bfc") // keccak256("RedStone.oracleValuesMapping");
RED_STONE_LATEST_ROUND_ID_STORAGE_LOCATION = common.HexToHash("0xc68d7f1ee07d8668991a8951e720010c9d44c2f11c06b5cac61fbc4083263938") // keccak256("RedStone.latestRoundId");

AGGREGATOR_MAP_SLOT int64 = 1
RED_STONE_ADAPTER_SLOT int64 = 2
AGGREGATOR_MAP_SLOT int64 = 1
RED_STONE_ADAPTER_SLOT int64 = 2
CUSTOM_ORACLE_ROUND_ID_SLOT int64 = 0
CUSTOM_ORACLE_ENTRIES_SLOT int64 = 1
)

const (
Expand All @@ -29,15 +32,26 @@ func getUnderlyingPrice(stateDB contract.StateDB, market common.Address) *big.In

func getUnderlyingPrice_(stateDB contract.StateDB, underlying common.Address) *big.Int {
oracle := getOracleAddress(stateDB) // this comes from margin account

// 1. Check for redstone feed id
feedId := getRedStoneFeedId(stateDB, oracle, underlying)
if feedId.Big().Sign() != 0 {
// redstone oracle is configured for this market
redStoneAdapter := getRedStoneAdapterAddress(stateDB, oracle)
redstonePrice := getRedStonePrice(stateDB, redStoneAdapter, feedId)
// log.Info("redstone-price", "amm", market, "price", redstonePrice)
return redstonePrice
}
// red stone oracle is not enabled for this market, we use the default TestOracle

// 2. Check for custom oracle
aggregator := getAggregatorAddress(stateDB, oracle, underlying)
if aggregator.Big().Sign() != 0 {
// custom oracle is configured for this market
price := getCustomOraclePrice(stateDB, aggregator)
log.Info("custom-oracle-price", "underlying", underlying, "price", price)
return price
}

// 3. neither red stone nor custom oracle is enabled for this market, we use the default TestOracle
slot := crypto.Keccak256(append(common.LeftPadBytes(underlying.Bytes(), 32), common.BigToHash(big.NewInt(TEST_ORACLE_PRICES_MAPPING_SLOT)).Bytes()...))
return fromTwosComplement(stateDB.GetState(oracle, common.BytesToHash(slot)).Bytes())
}
Expand Down Expand Up @@ -65,7 +79,24 @@ func getlatestRoundId(stateDB contract.StateDB, adapterAddress common.Address) *
return fromTwosComplement(stateDB.GetState(adapterAddress, RED_STONE_LATEST_ROUND_ID_STORAGE_LOCATION).Bytes())
}

func aggregatorMapSlot(underlying common.Address) *big.Int {
return new(big.Int).SetBytes(crypto.Keccak256(append(common.LeftPadBytes(underlying.Bytes(), 32), common.BigToHash(big.NewInt(AGGREGATOR_MAP_SLOT)).Bytes()...)))
}

func getRedStoneFeedId(stateDB contract.StateDB, oracle, underlying common.Address) common.Hash {
aggregatorMapSlot := crypto.Keccak256(append(common.LeftPadBytes(underlying.Bytes(), 32), common.BigToHash(big.NewInt(AGGREGATOR_MAP_SLOT)).Bytes()...))
return stateDB.GetState(oracle, common.BytesToHash(aggregatorMapSlot))
aggregatorMapSlot := aggregatorMapSlot(underlying)
return stateDB.GetState(oracle, common.BigToHash(aggregatorMapSlot))
}

func getAggregatorAddress(stateDB contract.StateDB, oracle, underlying common.Address) common.Address {
aggregatorMapSlot := aggregatorMapSlot(underlying)
aggregatorSlot := hu.Add(aggregatorMapSlot, big.NewInt(1))
return common.BytesToAddress(stateDB.GetState(oracle, common.BigToHash(aggregatorSlot)).Bytes())
}

func getCustomOraclePrice(stateDB contract.StateDB, aggregator common.Address) *big.Int {
roundId := stateDB.GetState(aggregator, common.BigToHash(big.NewInt(CUSTOM_ORACLE_ROUND_ID_SLOT))).Bytes()
entriesSlot := new(big.Int).SetBytes(crypto.Keccak256(append(common.LeftPadBytes(roundId, 32), common.BigToHash(big.NewInt(CUSTOM_ORACLE_ENTRIES_SLOT)).Bytes()...)))
priceSlot := hu.Add(entriesSlot, big.NewInt(1))
return hu.Div(fromTwosComplement(stateDB.GetState(aggregator, common.BigToHash(priceSlot)).Bytes()), big.NewInt(100)) // we use 6 decimals precision everywhere
}
Loading