462 lines
14 KiB
Go
462 lines
14 KiB
Go
package events
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import (
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"fmt"
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/holiman/uint256"
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)
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// EventType represents the type of DEX event
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type EventType int
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const (
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Unknown EventType = iota
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Swap
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AddLiquidity
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RemoveLiquidity
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NewPool
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)
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// String returns a string representation of the event type
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func (et EventType) String() string {
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switch et {
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case Unknown:
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return "Unknown"
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case Swap:
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return "Swap"
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case AddLiquidity:
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return "AddLiquidity"
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case RemoveLiquidity:
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return "RemoveLiquidity"
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case NewPool:
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return "NewPool"
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default:
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return "Unknown"
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}
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}
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type Event struct {
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Type EventType
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Protocol string // UniswapV2, UniswapV3, SushiSwap, etc.
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PoolAddress common.Address
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Token0 common.Address
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Token1 common.Address
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Amount0 *big.Int
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Amount1 *big.Int
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SqrtPriceX96 *uint256.Int
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Liquidity *uint256.Int
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Tick int
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Timestamp uint64
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TransactionHash common.Hash
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BlockNumber uint64
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}
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// EventParser parses DEX events from Ethereum transactions
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type EventParser struct {
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// Known DEX contract addresses
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UniswapV2Factory common.Address
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UniswapV3Factory common.Address
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SushiSwapFactory common.Address
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// Router addresses
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UniswapV2Router01 common.Address
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UniswapV2Router02 common.Address
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UniswapV3Router common.Address
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SushiSwapRouter common.Address
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// Known pool addresses (for quick lookup)
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knownPools map[common.Address]string
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// Event signatures for parsing logs
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swapEventV2Sig common.Hash
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swapEventV3Sig common.Hash
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mintEventV2Sig common.Hash
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mintEventV3Sig common.Hash
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burnEventV2Sig common.Hash
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burnEventV3Sig common.Hash
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}
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// NewEventParser creates a new event parser with official Arbitrum deployment addresses
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func NewEventParser() *EventParser {
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parser := &EventParser{
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// Official Arbitrum DEX Factory Addresses
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UniswapV2Factory: common.HexToAddress("0xf1D7CC64Fb4452F05c498126312eBE29f30Fbcf9"), // Official Uniswap V2 Factory on Arbitrum
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UniswapV3Factory: common.HexToAddress("0x1F98431c8aD98523631AE4a59f267346ea31F984"), // Official Uniswap V3 Factory on Arbitrum
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SushiSwapFactory: common.HexToAddress("0xc35DADB65012eC5796536bD9864eD8773aBc74C4"), // Official SushiSwap V2 Factory on Arbitrum
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// Official Arbitrum DEX Router Addresses
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UniswapV2Router01: common.HexToAddress("0x0000000000000000000000000000000000000000"), // V2Router01 not deployed on Arbitrum
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UniswapV2Router02: common.HexToAddress("0x4752ba5dbc23f44d87826276bf6fd6b1c372ad24"), // Official Uniswap V2 Router02 on Arbitrum
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UniswapV3Router: common.HexToAddress("0xE592427A0AEce92De3Edee1F18E0157C05861564"), // Official Uniswap V3 SwapRouter on Arbitrum
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SushiSwapRouter: common.HexToAddress("0x1b02dA8Cb0d097eB8D57A175b88c7D8b47997506"), // Official SushiSwap Router on Arbitrum
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knownPools: make(map[common.Address]string),
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}
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// Initialize event signatures
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parser.swapEventV2Sig = crypto.Keccak256Hash([]byte("Swap(address,uint256,uint256,uint256,uint256,address)"))
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parser.swapEventV3Sig = crypto.Keccak256Hash([]byte("Swap(address,address,int256,int256,uint160,uint128,int24)"))
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parser.mintEventV2Sig = crypto.Keccak256Hash([]byte("Mint(address,uint256,uint256)"))
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parser.mintEventV3Sig = crypto.Keccak256Hash([]byte("Mint(address,address,int24,int24,uint128,uint256,uint256)"))
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parser.burnEventV2Sig = crypto.Keccak256Hash([]byte("Burn(address,uint256,uint256)"))
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parser.burnEventV3Sig = crypto.Keccak256Hash([]byte("Burn(address,int24,int24,uint128,uint256,uint256)"))
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// Pre-populate known Arbitrum pools (high volume pools)
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parser.knownPools[common.HexToAddress("0xC6962004f452bE9203591991D15f6b388e09E8D0")] = "UniswapV3" // USDC/WETH 0.05%
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parser.knownPools[common.HexToAddress("0x17c14D2c404D167802b16C450d3c99F88F2c4F4d")] = "UniswapV3" // USDC/WETH 0.3%
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parser.knownPools[common.HexToAddress("0x2f5e87C9312fa29aed5c179E456625D79015299c")] = "UniswapV3" // WBTC/WETH 0.05%
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parser.knownPools[common.HexToAddress("0x149e36E72726e0BceA5c59d40df2c43F60f5A22D")] = "UniswapV3" // WBTC/WETH 0.3%
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parser.knownPools[common.HexToAddress("0x641C00A822e8b671738d32a431a4Fb6074E5c79d")] = "UniswapV3" // USDT/WETH 0.05%
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parser.knownPools[common.HexToAddress("0xFe7D6a84287235C7b4b57C4fEb9a44d4C6Ed3BB8")] = "UniswapV3" // ARB/WETH 0.05%
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parser.knownPools[common.HexToAddress("0x80A9ae39310abf666A87C743d6ebBD0E8C42158E")] = "UniswapV3" // WETH/USDT 0.3%
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parser.knownPools[common.HexToAddress("0xC82819F72A9e77E2c0c3A69B3196478f44303cf4")] = "UniswapV3" // WETH/USDC 1%
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// Add SushiSwap pools
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parser.knownPools[common.HexToAddress("0x905dfCD5649217c42684f23958568e533C711Aa3")] = "SushiSwap" // WETH/USDC
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parser.knownPools[common.HexToAddress("0x3221022e37029923aCe4235D812273C5A42C322d")] = "SushiSwap" // WETH/USDT
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// Add GMX pools
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parser.knownPools[common.HexToAddress("0x70d95587d40A2caf56bd97485aB3Eec10Bee6336")] = "GMX" // GLP Pool
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parser.knownPools[common.HexToAddress("0x489ee077994B6658eAfA855C308275EAd8097C4A")] = "GMX" // GMX/WETH
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return parser
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}
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// ParseTransactionReceipt parses events from a transaction receipt
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func (ep *EventParser) ParseTransactionReceipt(receipt *types.Receipt, blockNumber uint64, timestamp uint64) ([]*Event, error) {
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events := make([]*Event, 0)
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// Parse logs for DEX events
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for _, log := range receipt.Logs {
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// Skip anonymous logs
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if len(log.Topics) == 0 {
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continue
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}
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// Check if this is a DEX event based on the topic signature
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eventSig := log.Topics[0]
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var event *Event
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var err error
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switch eventSig {
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case ep.swapEventV2Sig:
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event, err = ep.parseUniswapV2Swap(log, blockNumber, timestamp, receipt.TxHash)
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case ep.swapEventV3Sig:
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event, err = ep.parseUniswapV3Swap(log, blockNumber, timestamp, receipt.TxHash)
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case ep.mintEventV2Sig:
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event, err = ep.parseUniswapV2Mint(log, blockNumber, timestamp, receipt.TxHash)
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case ep.mintEventV3Sig:
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event, err = ep.parseUniswapV3Mint(log, blockNumber, timestamp, receipt.TxHash)
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case ep.burnEventV2Sig:
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event, err = ep.parseUniswapV2Burn(log, blockNumber, timestamp, receipt.TxHash)
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case ep.burnEventV3Sig:
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event, err = ep.parseUniswapV3Burn(log, blockNumber, timestamp, receipt.TxHash)
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}
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if err != nil {
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// Log error but continue parsing other logs
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continue
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}
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if event != nil {
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events = append(events, event)
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}
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}
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return events, nil
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}
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// IsDEXInteraction checks if a transaction interacts with a known DEX contract
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func (ep *EventParser) IsDEXInteraction(tx *types.Transaction) bool {
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if tx.To() == nil {
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return false
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}
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to := *tx.To()
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// Check factory contracts
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if to == ep.UniswapV2Factory ||
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to == ep.UniswapV3Factory ||
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to == ep.SushiSwapFactory {
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return true
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}
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// Check router contracts
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if to == ep.UniswapV2Router01 ||
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to == ep.UniswapV2Router02 ||
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to == ep.UniswapV3Router ||
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to == ep.SushiSwapRouter {
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return true
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}
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// Check known pools
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if _, exists := ep.knownPools[to]; exists {
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return true
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}
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return false
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}
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// identifyProtocol identifies which DEX protocol a transaction is interacting with
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func (ep *EventParser) identifyProtocol(tx *types.Transaction) string {
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if tx.To() == nil {
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return "Unknown"
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}
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to := *tx.To()
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// Check factory contracts
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if to == ep.UniswapV2Factory {
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return "UniswapV2"
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}
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if to == ep.UniswapV3Factory {
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return "UniswapV3"
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}
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if to == ep.SushiSwapFactory {
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return "SushiSwap"
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}
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// Check router contracts
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if to == ep.UniswapV2Router01 || to == ep.UniswapV2Router02 {
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return "UniswapV2"
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}
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if to == ep.UniswapV3Router {
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return "UniswapV3"
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}
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if to == ep.SushiSwapRouter {
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return "SushiSwap"
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}
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// Check known pools
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if protocol, exists := ep.knownPools[to]; exists {
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return protocol
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}
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// Try to identify from function signature in transaction data
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if len(tx.Data()) >= 4 {
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sig := common.Bytes2Hex(tx.Data()[:4])
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switch sig {
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case "0xac9650d8": // multicall (Uniswap V3)
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return "UniswapV3"
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case "0x88316456": // swap (Uniswap V2)
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return "UniswapV2"
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case "0x128acb08": // swap (SushiSwap)
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return "SushiSwap"
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case "0x38ed1739": // swapExactTokensForTokens (Uniswap V2)
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return "UniswapV2"
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case "0x8803dbee": // swapTokensForExactTokens (Uniswap V2)
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return "UniswapV2"
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case "0x7ff36ab5": // swapExactETHForTokens (Uniswap V2)
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return "UniswapV2"
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case "0xb6f9de95": // swapExactTokensForETH (Uniswap V2)
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return "UniswapV2"
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case "0x414bf389": // exactInputSingle (Uniswap V3)
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return "UniswapV3"
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case "0xdb3e2198": // exactInput (Uniswap V3)
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return "UniswapV3"
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case "0xf305d719": // exactOutputSingle (Uniswap V3)
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return "UniswapV3"
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case "0x04e45aaf": // exactOutput (Uniswap V3)
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return "UniswapV3"
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case "0x18cbafe5": // swapExactTokensForTokensSupportingFeeOnTransferTokens (Uniswap V2)
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return "UniswapV2"
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case "0x18cffa1c": // swapExactETHForTokensSupportingFeeOnTransferTokens (Uniswap V2)
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return "UniswapV2"
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case "0x791ac947": // swapExactTokensForETHSupportingFeeOnTransferTokens (Uniswap V2)
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return "UniswapV2"
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case "0x5ae401dc": // multicall (Uniswap V3)
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return "UniswapV3"
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}
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}
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return "Unknown"
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}
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// parseUniswapV2Swap parses a Uniswap V2 Swap event
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func (ep *EventParser) parseUniswapV2Swap(log *types.Log, blockNumber uint64, timestamp uint64, txHash common.Hash) (*Event, error) {
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if len(log.Topics) != 2 || len(log.Data) != 32*4 {
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return nil, fmt.Errorf("invalid Uniswap V2 Swap event log")
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}
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// Parse the data fields
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amount0In := new(big.Int).SetBytes(log.Data[0:32])
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amount1In := new(big.Int).SetBytes(log.Data[32:64])
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amount0Out := new(big.Int).SetBytes(log.Data[64:96])
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amount1Out := new(big.Int).SetBytes(log.Data[96:128])
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// Determine which token is being swapped in/out
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var amount0, amount1 *big.Int
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if amount0In.Cmp(big.NewInt(0)) > 0 {
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amount0 = amount0In
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} else {
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amount0 = new(big.Int).Neg(amount0Out)
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}
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if amount1In.Cmp(big.NewInt(0)) > 0 {
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amount1 = amount1In
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} else {
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amount1 = new(big.Int).Neg(amount1Out)
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}
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event := &Event{
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Type: Swap,
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Protocol: "UniswapV2",
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PoolAddress: log.Address,
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Amount0: amount0,
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Amount1: amount1,
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Timestamp: timestamp,
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TransactionHash: txHash,
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BlockNumber: blockNumber,
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}
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return event, nil
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}
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// parseUniswapV3Swap parses a Uniswap V3 Swap event
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func (ep *EventParser) parseUniswapV3Swap(log *types.Log, blockNumber uint64, timestamp uint64, txHash common.Hash) (*Event, error) {
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if len(log.Topics) != 3 || len(log.Data) != 32*5 {
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return nil, fmt.Errorf("invalid Uniswap V3 Swap event log")
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}
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// Parse the data fields
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amount0 := new(big.Int).SetBytes(log.Data[0:32])
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amount1 := new(big.Int).SetBytes(log.Data[32:64])
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sqrtPriceX96 := new(big.Int).SetBytes(log.Data[64:96])
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liquidity := new(big.Int).SetBytes(log.Data[96:128])
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tick := new(big.Int).SetBytes(log.Data[128:160])
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// Convert to signed values if needed
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if amount0.Cmp(big.NewInt(0)) > 0x7fffffffffffffff {
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amount0 = amount0.Sub(amount0, new(big.Int).Lsh(big.NewInt(1), 256))
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}
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if amount1.Cmp(big.NewInt(0)) > 0x7fffffffffffffff {
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amount1 = amount1.Sub(amount1, new(big.Int).Lsh(big.NewInt(1), 256))
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}
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event := &Event{
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Type: Swap,
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Protocol: "UniswapV3",
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PoolAddress: log.Address,
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Amount0: amount0,
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Amount1: amount1,
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SqrtPriceX96: uint256.MustFromBig(sqrtPriceX96),
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Liquidity: uint256.MustFromBig(liquidity),
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Tick: int(tick.Int64()),
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Timestamp: timestamp,
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TransactionHash: txHash,
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BlockNumber: blockNumber,
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}
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return event, nil
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}
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// parseUniswapV2Mint parses a Uniswap V2 Mint event
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func (ep *EventParser) parseUniswapV2Mint(log *types.Log, blockNumber uint64, timestamp uint64, txHash common.Hash) (*Event, error) {
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if len(log.Topics) != 2 || len(log.Data) != 32*2 {
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return nil, fmt.Errorf("invalid Uniswap V2 Mint event log")
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}
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// Parse the data fields
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amount0 := new(big.Int).SetBytes(log.Data[0:32])
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amount1 := new(big.Int).SetBytes(log.Data[32:64])
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event := &Event{
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Type: AddLiquidity,
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Protocol: "UniswapV2",
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PoolAddress: log.Address,
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Amount0: amount0,
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Amount1: amount1,
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Timestamp: timestamp,
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TransactionHash: txHash,
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BlockNumber: blockNumber,
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}
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return event, nil
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}
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// parseUniswapV3Mint parses a Uniswap V3 Mint event
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func (ep *EventParser) parseUniswapV3Mint(log *types.Log, blockNumber uint64, timestamp uint64, txHash common.Hash) (*Event, error) {
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if len(log.Topics) != 3 || len(log.Data) != 32*4 {
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return nil, fmt.Errorf("invalid Uniswap V3 Mint event log")
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}
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// Parse the data fields
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amount0 := new(big.Int).SetBytes(log.Data[0:32])
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amount1 := new(big.Int).SetBytes(log.Data[32:64])
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event := &Event{
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Type: AddLiquidity,
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Protocol: "UniswapV3",
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PoolAddress: log.Address,
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Amount0: amount0,
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Amount1: amount1,
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Timestamp: timestamp,
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TransactionHash: txHash,
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BlockNumber: blockNumber,
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}
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return event, nil
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}
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// parseUniswapV2Burn parses a Uniswap V2 Burn event
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func (ep *EventParser) parseUniswapV2Burn(log *types.Log, blockNumber uint64, timestamp uint64, txHash common.Hash) (*Event, error) {
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if len(log.Topics) != 2 || len(log.Data) != 32*2 {
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return nil, fmt.Errorf("invalid Uniswap V2 Burn event log")
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}
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// Parse the data fields
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amount0 := new(big.Int).SetBytes(log.Data[0:32])
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amount1 := new(big.Int).SetBytes(log.Data[32:64])
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event := &Event{
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Type: RemoveLiquidity,
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Protocol: "UniswapV2",
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PoolAddress: log.Address,
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Amount0: amount0,
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Amount1: amount1,
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Timestamp: timestamp,
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TransactionHash: txHash,
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BlockNumber: blockNumber,
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}
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return event, nil
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}
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// parseUniswapV3Burn parses a Uniswap V3 Burn event
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func (ep *EventParser) parseUniswapV3Burn(log *types.Log, blockNumber uint64, timestamp uint64, txHash common.Hash) (*Event, error) {
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if len(log.Topics) != 3 || len(log.Data) != 32*4 {
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return nil, fmt.Errorf("invalid Uniswap V3 Burn event log")
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}
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// Parse the data fields
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amount0 := new(big.Int).SetBytes(log.Data[0:32])
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amount1 := new(big.Int).SetBytes(log.Data[32:64])
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event := &Event{
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Type: RemoveLiquidity,
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Protocol: "UniswapV3",
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PoolAddress: log.Address,
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Amount0: amount0,
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Amount1: amount1,
|
|
Timestamp: timestamp,
|
|
TransactionHash: txHash,
|
|
BlockNumber: blockNumber,
|
|
}
|
|
|
|
return event, nil
|
|
}
|
|
|
|
// AddKnownPool adds a pool address to the known pools map
|
|
func (ep *EventParser) AddKnownPool(address common.Address, protocol string) {
|
|
ep.knownPools[address] = protocol
|
|
}
|
|
|
|
// GetKnownPools returns all known pools
|
|
func (ep *EventParser) GetKnownPools() map[common.Address]string {
|
|
return ep.knownPools
|
|
}
|