bff049c7a3
- Created UniswapV2Parser with Swap event parsing - Manual ABI decoding for reliability and performance - Token extraction from pool cache - Proper decimal handling (6, 8, 18 decimals) - Mint/Burn events recognized but ignored for MVP - Receipt parsing for multi-event transactions - Comprehensive test suite with 14 test cases - Test helpers for reusable mock logger and ABI encoding - Factory registration via NewDefaultFactory() - Defensive programming (nil logger allowed) Coverage: 86.6% on uniswap_v2.go Tests: All 14 test cases passing Lines: ~240 implementation, ~400 tests Fast MVP: Week 1, Days 1-2 ✅ COMPLETE 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
404 lines
11 KiB
Go
404 lines
11 KiB
Go
package parsers
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import (
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"context"
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"math/big"
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"testing"
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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/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"coppertone.tech/fraktal/mev-bot/pkg/cache"
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pkgtypes "coppertone.tech/fraktal/mev-bot/pkg/types"
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)
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func TestNewUniswapV2Parser(t *testing.T) {
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tests := []struct {
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name string
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cache cache.PoolCache
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logger *mockLogger
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wantError bool
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}{
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{
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name: "valid inputs",
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cache: cache.NewPoolCache(),
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logger: &mockLogger{},
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wantError: false,
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},
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{
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name: "nil cache",
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cache: nil,
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logger: &mockLogger{},
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wantError: true,
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},
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{
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name: "nil logger",
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cache: cache.NewPoolCache(),
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logger: nil,
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wantError: false, // We allow nil logger, will use default or just log to void
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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parser, err := NewUniswapV2Parser(tt.cache, tt.logger)
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if tt.wantError {
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assert.Error(t, err)
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assert.Nil(t, parser)
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} else {
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assert.NoError(t, err)
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assert.NotNil(t, parser)
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assert.Equal(t, pkgtypes.ProtocolUniswapV2, parser.Protocol())
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}
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})
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}
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}
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func TestUniswapV2Parser_Protocol(t *testing.T) {
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parser, err := NewUniswapV2Parser(cache.NewPoolCache(), &mockLogger{})
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require.NoError(t, err)
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assert.Equal(t, pkgtypes.ProtocolUniswapV2, parser.Protocol())
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}
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func TestUniswapV2Parser_SupportsLog(t *testing.T) {
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parser, err := NewUniswapV2Parser(cache.NewPoolCache(), &mockLogger{})
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require.NoError(t, err)
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tests := []struct {
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name string
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log types.Log
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supports bool
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}{
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{
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name: "swap event",
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log: types.Log{
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Topics: []common.Hash{UniswapV2SwapSignature},
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},
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supports: true,
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},
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{
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name: "mint event",
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log: types.Log{
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Topics: []common.Hash{UniswapV2MintSignature},
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},
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supports: true,
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},
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{
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name: "burn event",
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log: types.Log{
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Topics: []common.Hash{UniswapV2BurnSignature},
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},
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supports: true,
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},
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{
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name: "unsupported event",
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log: types.Log{
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Topics: []common.Hash{common.HexToHash("0x1234567890")},
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},
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supports: false,
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},
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{
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name: "no topics",
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log: types.Log{
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Topics: []common.Hash{},
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},
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supports: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result := parser.SupportsLog(tt.log)
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assert.Equal(t, tt.supports, result)
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})
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}
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}
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func TestUniswapV2Parser_ParseSwap(t *testing.T) {
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// Setup
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poolCache := cache.NewPoolCache()
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parser, err := NewUniswapV2Parser(poolCache, &mockLogger{})
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require.NoError(t, err)
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// Add a test pool to cache
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poolAddress := common.HexToAddress("0x1234567890123456789012345678901234567890")
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token0 := common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1") // WETH on Arbitrum
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token1 := common.HexToAddress("0xFF970A61A04b1cA14834A43f5dE4533eBDDB5CC8") // USDC on Arbitrum
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pool := &pkgtypes.PoolInfo{
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Address: poolAddress,
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Protocol: pkgtypes.ProtocolUniswapV2,
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Token0: token0,
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Token1: token1,
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Token0Decimals: 18,
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Token1Decimals: 6,
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}
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ctx := context.Background()
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err = poolCache.Add(ctx, pool)
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require.NoError(t, err)
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// Create a minimal transaction for testing
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testTx := types.NewTx(&types.LegacyTx{
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Nonce: 0,
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GasPrice: big.NewInt(1),
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Gas: 21000,
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To: &poolAddress,
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Value: big.NewInt(0),
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Data: []byte{},
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})
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tests := []struct {
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name string
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log types.Log
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tx *types.Transaction
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wantError bool
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validate func(t *testing.T, event *pkgtypes.SwapEvent)
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}{
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{
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name: "swap token0 for token1",
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log: types.Log{
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Address: poolAddress,
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Topics: []common.Hash{
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UniswapV2SwapSignature,
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common.HexToHash("0x000000000000000000000000abcdef0123456789abcdef0123456789abcdef01"), // sender
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common.HexToHash("0x000000000000000000000000fedcba9876543210fedcba9876543210fedcba98"), // recipient
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},
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Data: encodeSwapData(
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big.NewInt(1000000000000000000), // 1 WETH in (amount0In)
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big.NewInt(0), // 0 USDC in (amount1In)
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big.NewInt(0), // 0 WETH out (amount0Out)
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big.NewInt(3000000000), // 3000 USDC out (amount1Out)
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),
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BlockNumber: 100,
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Index: 5,
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},
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tx: testTx,
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wantError: false,
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validate: func(t *testing.T, event *pkgtypes.SwapEvent) {
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assert.Equal(t, pkgtypes.ProtocolUniswapV2, event.Protocol)
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assert.Equal(t, poolAddress, event.PoolAddress)
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assert.Equal(t, token0, event.Token0)
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assert.Equal(t, token1, event.Token1)
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// Swapping token0 for token1
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assert.Equal(t, "1000000000000000000", event.Amount0In.String())
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assert.Equal(t, "0", event.Amount1In.String())
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assert.Equal(t, "0", event.Amount0Out.String())
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assert.Equal(t, "3000000000", event.Amount1Out.String())
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assert.Equal(t, uint64(100), event.BlockNumber)
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assert.Equal(t, uint(5), event.LogIndex)
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},
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},
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{
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name: "swap token1 for token0",
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log: types.Log{
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Address: poolAddress,
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Topics: []common.Hash{
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UniswapV2SwapSignature,
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common.HexToHash("0x000000000000000000000000abcdef0123456789abcdef0123456789abcdef01"),
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common.HexToHash("0x000000000000000000000000fedcba9876543210fedcba9876543210fedcba98"),
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},
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Data: encodeSwapData(
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big.NewInt(0), // 0 WETH in (amount0In)
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big.NewInt(3000000000), // 3000 USDC in (amount1In)
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big.NewInt(1000000000000000000), // 1 WETH out (amount0Out)
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big.NewInt(0), // 0 USDC out (amount1Out)
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),
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BlockNumber: 101,
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Index: 3,
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},
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tx: testTx,
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wantError: false,
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validate: func(t *testing.T, event *pkgtypes.SwapEvent) {
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// Swapping token1 for token0
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assert.Equal(t, "0", event.Amount0In.String())
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assert.Equal(t, "3000000000", event.Amount1In.String())
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assert.Equal(t, "1000000000000000000", event.Amount0Out.String())
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assert.Equal(t, "0", event.Amount1Out.String())
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},
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},
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{
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name: "zero amounts should error",
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log: types.Log{
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Address: poolAddress,
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Topics: []common.Hash{
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UniswapV2SwapSignature,
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common.HexToHash("0x000000000000000000000000abcdef0123456789abcdef0123456789abcdef01"),
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common.HexToHash("0x000000000000000000000000fedcba9876543210fedcba9876543210fedcba98"),
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},
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Data: encodeSwapData(
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big.NewInt(0), // 0 in
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big.NewInt(0), // 0 in
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big.NewInt(0), // 0 out
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big.NewInt(0), // 0 out
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),
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BlockNumber: 102,
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Index: 1,
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},
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tx: testTx,
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wantError: true,
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},
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{
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name: "pool not in cache should error",
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log: types.Log{
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Address: common.HexToAddress("0xUNKNOWN00000000000000000000000000000000"),
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Topics: []common.Hash{
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UniswapV2SwapSignature,
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common.HexToHash("0x000000000000000000000000abcdef0123456789abcdef0123456789abcdef01"),
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common.HexToHash("0x000000000000000000000000fedcba9876543210fedcba9876543210fedcba98"),
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},
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Data: encodeSwapData(
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big.NewInt(1000000000000000000),
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big.NewInt(0),
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big.NewInt(0),
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big.NewInt(3000000000),
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),
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BlockNumber: 103,
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Index: 2,
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},
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tx: testTx,
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wantError: true,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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event, err := parser.ParseLog(ctx, tt.log, tt.tx)
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if tt.wantError {
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assert.Error(t, err)
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assert.Nil(t, event)
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} else {
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assert.NoError(t, err)
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assert.NotNil(t, event)
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if tt.validate != nil {
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tt.validate(t, event)
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}
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}
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})
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}
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}
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func TestUniswapV2Parser_ParseMintBurn(t *testing.T) {
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poolCache := cache.NewPoolCache()
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parser, err := NewUniswapV2Parser(poolCache, &mockLogger{})
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require.NoError(t, err)
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ctx := context.Background()
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tx := &types.Transaction{}
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t.Run("mint event returns nil", func(t *testing.T) {
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log := types.Log{
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Topics: []common.Hash{UniswapV2MintSignature},
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}
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event, err := parser.ParseLog(ctx, log, tx)
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assert.NoError(t, err)
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assert.Nil(t, event) // Mint events are ignored in MVP
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})
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t.Run("burn event returns nil", func(t *testing.T) {
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log := types.Log{
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Topics: []common.Hash{UniswapV2BurnSignature},
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}
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event, err := parser.ParseLog(ctx, log, tx)
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assert.NoError(t, err)
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assert.Nil(t, event) // Burn events are ignored in MVP
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})
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}
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func TestUniswapV2Parser_ParseReceipt(t *testing.T) {
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// Setup
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poolCache := cache.NewPoolCache()
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parser, err := NewUniswapV2Parser(poolCache, &mockLogger{})
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require.NoError(t, err)
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// Add test pool
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poolAddress := common.HexToAddress("0x1234567890123456789012345678901234567890")
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pool := &pkgtypes.PoolInfo{
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Address: poolAddress,
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Protocol: pkgtypes.ProtocolUniswapV2,
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Token0: common.HexToAddress("0x82aF49447D8a07e3bd95BD0d56f35241523fBab1"), // WETH on Arbitrum
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Token1: common.HexToAddress("0xFF970A61A04b1cA14834A43f5dE4533eBDDB5CC8"), // USDC on Arbitrum
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Token0Decimals: 18,
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Token1Decimals: 6,
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}
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ctx := context.Background()
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err = poolCache.Add(ctx, pool)
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require.NoError(t, err)
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t.Run("parse receipt with multiple logs", func(t *testing.T) {
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testTx := types.NewTx(&types.LegacyTx{
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Nonce: 0,
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GasPrice: big.NewInt(1),
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Gas: 21000,
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To: &poolAddress,
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Value: big.NewInt(0),
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Data: []byte{},
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})
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receipt := &types.Receipt{
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Logs: []*types.Log{
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// Valid swap
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{
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Address: poolAddress,
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Topics: []common.Hash{
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UniswapV2SwapSignature,
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common.HexToHash("0x000000000000000000000000abcdef0123456789abcdef0123456789abcdef01"),
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common.HexToHash("0x000000000000000000000000fedcba9876543210fedcba9876543210fedcba98"),
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},
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Data: encodeSwapData(
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big.NewInt(1000000000000000000),
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big.NewInt(0),
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big.NewInt(0),
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big.NewInt(3000000000),
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),
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BlockNumber: 100,
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Index: 0,
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},
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// Mint event (should be ignored)
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{
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Topics: []common.Hash{UniswapV2MintSignature},
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Index: 1,
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},
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// Unsupported event (should be skipped)
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{
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Topics: []common.Hash{common.HexToHash("0xUNSUPPORTED")},
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Index: 2,
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},
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},
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}
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events, err := parser.ParseReceipt(ctx, receipt, testTx)
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assert.NoError(t, err)
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assert.Len(t, events, 1) // Only the valid swap
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assert.Equal(t, pkgtypes.ProtocolUniswapV2, events[0].Protocol)
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})
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t.Run("parse receipt with no supported logs", func(t *testing.T) {
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testTx := types.NewTx(&types.LegacyTx{
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Nonce: 0,
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GasPrice: big.NewInt(1),
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Gas: 21000,
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To: &poolAddress,
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Value: big.NewInt(0),
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Data: []byte{},
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})
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receipt := &types.Receipt{
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Logs: []*types.Log{
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{
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Topics: []common.Hash{common.HexToHash("0xUNSUPPORTED")},
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},
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},
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}
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events, err := parser.ParseReceipt(ctx, receipt, testTx)
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assert.NoError(t, err)
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assert.Len(t, events, 0)
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})
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}
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