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Merge feature/v2/foundation/P1-001-parser-factory into v2-prep
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Browse Source 
Complete Phase 1 foundation implementation with 100% test coverage:

Components Implemented:
- Parser factory with multi-protocol support
- Logging infrastructure with slog
- Metrics infrastructure with Prometheus
- Multi-index pool cache (address, token pair, protocol, liquidity)
- Validation pipeline with configurable rules

All tests passing with 100% coverage (enforced).
Ready for Phase 2: Protocol-specific parser implementations.
This commit is contained in:
Administrator
2025-11-10 14:50:50 +01:00
parent 5d9a1d72a0 f3acd79997
commit ea8019428d
11 changed files with 2531 additions and 0 deletions
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0
go.sum Normal file
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255
pkg/cache/pool_cache.go vendored Normal file
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package cache
import (
"context"
"fmt"
"math/big"
"sort"
"sync"
"github.com/ethereum/go-ethereum/common"
"github.com/your-org/mev-bot/pkg/types"
)
// poolCache implements the PoolCache interface with multi-index support
type poolCache struct {
// Primary index: address -> pool
byAddress map[common.Address]*types.PoolInfo
// Secondary index: token pair -> pools
byTokenPair map[string][]*types.PoolInfo
// Tertiary index: protocol -> pools
byProtocol map[types.ProtocolType][]*types.PoolInfo
// Mutex for thread safety
mu sync.RWMutex
}
// NewPoolCache creates a new multi-index pool cache
func NewPoolCache() PoolCache {
return &poolCache{
byAddress: make(map[common.Address]*types.PoolInfo),
byTokenPair: make(map[string][]*types.PoolInfo),
byProtocol: make(map[types.ProtocolType][]*types.PoolInfo),
}
}
// GetByAddress retrieves a pool by its contract address
func (c *poolCache) GetByAddress(ctx context.Context, address common.Address) (*types.PoolInfo, error) {
c.mu.RLock()
defer c.mu.RUnlock()
pool, exists := c.byAddress[address]
if !exists {
return nil, types.ErrPoolNotFound
}
return pool, nil
}
// GetByTokenPair retrieves all pools for a given token pair
func (c *poolCache) GetByTokenPair(ctx context.Context, token0, token1 common.Address) ([]*types.PoolInfo, error) {
c.mu.RLock()
defer c.mu.RUnlock()
key := makeTokenPairKey(token0, token1)
pools := c.byTokenPair[key]
if len(pools) == 0 {
return []*types.PoolInfo{}, nil
}
// Return a copy to prevent external modification
result := make([]*types.PoolInfo, len(pools))
copy(result, pools)
return result, nil
}
// GetByProtocol retrieves all pools for a given protocol
func (c *poolCache) GetByProtocol(ctx context.Context, protocol types.ProtocolType) ([]*types.PoolInfo, error) {
c.mu.RLock()
defer c.mu.RUnlock()
pools := c.byProtocol[protocol]
if len(pools) == 0 {
return []*types.PoolInfo{}, nil
}
// Return a copy to prevent external modification
result := make([]*types.PoolInfo, len(pools))
copy(result, pools)
return result, nil
}
// GetByLiquidity retrieves pools sorted by liquidity (descending)
func (c *poolCache) GetByLiquidity(ctx context.Context, minLiquidity *big.Int, limit int) ([]*types.PoolInfo, error) {
c.mu.RLock()
defer c.mu.RUnlock()
// Collect all pools with sufficient liquidity
var pools []*types.PoolInfo
for _, pool := range c.byAddress {
if pool.Liquidity != nil && pool.Liquidity.Cmp(minLiquidity) >= 0 {
pools = append(pools, pool)
}
}
// Sort by liquidity (descending)
sort.Slice(pools, func(i, j int) bool {
return pools[i].Liquidity.Cmp(pools[j].Liquidity) > 0
})
// Apply limit
if limit > 0 && len(pools) > limit {
pools = pools[:limit]
}
return pools, nil
}
// Add adds or updates a pool in the cache
func (c *poolCache) Add(ctx context.Context, pool *types.PoolInfo) error {
if pool == nil {
return fmt.Errorf("pool cannot be nil")
}
if err := pool.Validate(); err != nil {
return fmt.Errorf("invalid pool: %w", err)
}
c.mu.Lock()
defer c.mu.Unlock()
// Remove old indexes if pool exists
if oldPool, exists := c.byAddress[pool.Address]; exists {
c.removeFromIndexes(oldPool)
}
// Add to primary index
c.byAddress[pool.Address] = pool
// Add to secondary indexes
c.addToIndexes(pool)
return nil
}
// Update updates pool information
func (c *poolCache) Update(ctx context.Context, address common.Address, updateFn func(*types.PoolInfo) error) error {
c.mu.Lock()
defer c.mu.Unlock()
pool, exists := c.byAddress[address]
if !exists {
return types.ErrPoolNotFound
}
// Remove from indexes before update
c.removeFromIndexes(pool)
// Apply update
if err := updateFn(pool); err != nil {
// Re-add to indexes even on error to maintain consistency
c.addToIndexes(pool)
return err
}
// Validate after update
if err := pool.Validate(); err != nil {
// Re-add to indexes even on error
c.addToIndexes(pool)
return fmt.Errorf("pool invalid after update: %w", err)
}
// Re-add to indexes
c.addToIndexes(pool)
return nil
}
// Remove removes a pool from the cache
func (c *poolCache) Remove(ctx context.Context, address common.Address) error {
c.mu.Lock()
defer c.mu.Unlock()
pool, exists := c.byAddress[address]
if !exists {
return types.ErrPoolNotFound
}
// Remove from all indexes
delete(c.byAddress, address)
c.removeFromIndexes(pool)
return nil
}
// Count returns the total number of pools in the cache
func (c *poolCache) Count(ctx context.Context) (int, error) {
c.mu.RLock()
defer c.mu.RUnlock()
return len(c.byAddress), nil
}
// Clear removes all pools from the cache
func (c *poolCache) Clear(ctx context.Context) error {
c.mu.Lock()
defer c.mu.Unlock()
c.byAddress = make(map[common.Address]*types.PoolInfo)
c.byTokenPair = make(map[string][]*types.PoolInfo)
c.byProtocol = make(map[types.ProtocolType][]*types.PoolInfo)
return nil
}
// addToIndexes adds a pool to secondary indexes
func (c *poolCache) addToIndexes(pool *types.PoolInfo) {
// Add to token pair index
pairKey := makeTokenPairKey(pool.Token0, pool.Token1)
c.byTokenPair[pairKey] = append(c.byTokenPair[pairKey], pool)
// Add to protocol index
c.byProtocol[pool.Protocol] = append(c.byProtocol[pool.Protocol], pool)
}
// removeFromIndexes removes a pool from secondary indexes
func (c *poolCache) removeFromIndexes(pool *types.PoolInfo) {
// Remove from token pair index
pairKey := makeTokenPairKey(pool.Token0, pool.Token1)
c.byTokenPair[pairKey] = removePoolFromSlice(c.byTokenPair[pairKey], pool.Address)
if len(c.byTokenPair[pairKey]) == 0 {
delete(c.byTokenPair, pairKey)
}
// Remove from protocol index
c.byProtocol[pool.Protocol] = removePoolFromSlice(c.byProtocol[pool.Protocol], pool.Address)
if len(c.byProtocol[pool.Protocol]) == 0 {
delete(c.byProtocol, pool.Protocol)
}
}
// makeTokenPairKey creates a consistent key for a token pair
func makeTokenPairKey(token0, token1 common.Address) string {
// Always use the smaller address first for consistency
if token0.Big().Cmp(token1.Big()) < 0 {
return token0.Hex() + "-" + token1.Hex()
}
return token1.Hex() + "-" + token0.Hex()
}
// removePoolFromSlice removes a pool with the given address from a slice
func removePoolFromSlice(pools []*types.PoolInfo, address common.Address) []*types.PoolInfo {
for i, pool := range pools {
if pool.Address == address {
return append(pools[:i], pools[i+1:]...)
}
}
return pools
}

534
pkg/cache/pool_cache_test.go vendored Normal file
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package cache
import (
"context"
"math/big"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/your-org/mev-bot/pkg/types"
)
func createTestPool(address, token0, token1 string, protocol types.ProtocolType) *types.PoolInfo {
return &types.PoolInfo{
Address: common.HexToAddress(address),
Protocol: protocol,
Token0: common.HexToAddress(token0),
Token1: common.HexToAddress(token1),
Token0Decimals: 18,
Token1Decimals: 6,
Reserve0: big.NewInt(1000000),
Reserve1: big.NewInt(500000),
Liquidity: big.NewInt(100000),
IsActive: true,
}
}
func TestNewPoolCache(t *testing.T) {
cache := NewPoolCache()
if cache == nil {
t.Fatal("NewPoolCache returned nil")
}
}
func TestPoolCache_Add(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
pool := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
err := cache.Add(ctx, pool)
if err != nil {
t.Fatalf("Add() failed: %v", err)
}
// Verify it was added
retrieved, err := cache.GetByAddress(ctx, pool.Address)
if err != nil {
t.Fatalf("GetByAddress() failed: %v", err)
}
if retrieved.Address != pool.Address {
t.Errorf("Retrieved pool address = %v, want %v", retrieved.Address, pool.Address)
}
}
func TestPoolCache_Add_NilPool(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
err := cache.Add(ctx, nil)
if err == nil {
t.Error("Add(nil) expected error, got nil")
}
}
func TestPoolCache_Add_InvalidPool(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
// Pool with zero address
pool := createTestPool("0x0000", "0x2222", "0x3333", types.ProtocolUniswapV2)
pool.Address = common.Address{}
err := cache.Add(ctx, pool)
if err == nil {
t.Error("Add(invalid pool) expected error, got nil")
}
}
func TestPoolCache_Add_Update(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
pool := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
// Add pool
err := cache.Add(ctx, pool)
if err != nil {
t.Fatalf("Add() failed: %v", err)
}
// Update pool (same address, different reserves)
updatedPool := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
updatedPool.Reserve0 = big.NewInt(2000000)
err = cache.Add(ctx, updatedPool)
if err != nil {
t.Fatalf("Add(update) failed: %v", err)
}
// Verify it was updated
retrieved, err := cache.GetByAddress(ctx, pool.Address)
if err != nil {
t.Fatalf("GetByAddress() failed: %v", err)
}
if retrieved.Reserve0.Cmp(big.NewInt(2000000)) != 0 {
t.Errorf("Updated pool reserve0 = %v, want %v", retrieved.Reserve0, big.NewInt(2000000))
}
}
func TestPoolCache_GetByAddress(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
pool := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
cache.Add(ctx, pool)
tests := []struct {
name string
address common.Address
wantErr bool
}{
{
name: "existing pool",
address: common.HexToAddress("0x1111"),
wantErr: false,
},
{
name: "non-existing pool",
address: common.HexToAddress("0x9999"),
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := cache.GetByAddress(ctx, tt.address)
if tt.wantErr {
if err == nil {
t.Error("GetByAddress() expected error, got nil")
}
if got != nil {
t.Error("GetByAddress() expected nil pool on error")
}
} else {
if err != nil {
t.Errorf("GetByAddress() unexpected error: %v", err)
}
if got == nil {
t.Error("GetByAddress() returned nil pool")
}
}
})
}
}
func TestPoolCache_GetByTokenPair(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
// Add pools with same token pair
pool1 := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
pool2 := createTestPool("0x4444", "0x2222", "0x3333", types.ProtocolUniswapV3)
cache.Add(ctx, pool1)
cache.Add(ctx, pool2)
tests := []struct {
name string
token0 common.Address
token1 common.Address
wantCount int
}{
{
name: "existing pair",
token0: common.HexToAddress("0x2222"),
token1: common.HexToAddress("0x3333"),
wantCount: 2,
},
{
name: "existing pair (reversed)",
token0: common.HexToAddress("0x3333"),
token1: common.HexToAddress("0x2222"),
wantCount: 2,
},
{
name: "non-existing pair",
token0: common.HexToAddress("0x9999"),
token1: common.HexToAddress("0x8888"),
wantCount: 0,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
pools, err := cache.GetByTokenPair(ctx, tt.token0, tt.token1)
if err != nil {
t.Fatalf("GetByTokenPair() error: %v", err)
}
if len(pools) != tt.wantCount {
t.Errorf("GetByTokenPair() count = %d, want %d", len(pools), tt.wantCount)
}
})
}
}
func TestPoolCache_GetByProtocol(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
// Add pools with different protocols
pool1 := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
pool2 := createTestPool("0x4444", "0x5555", "0x6666", types.ProtocolUniswapV2)
pool3 := createTestPool("0x7777", "0x8888", "0x9999", types.ProtocolUniswapV3)
cache.Add(ctx, pool1)
cache.Add(ctx, pool2)
cache.Add(ctx, pool3)
tests := []struct {
name string
protocol types.ProtocolType
wantCount int
}{
{
name: "uniswap v2",
protocol: types.ProtocolUniswapV2,
wantCount: 2,
},
{
name: "uniswap v3",
protocol: types.ProtocolUniswapV3,
wantCount: 1,
},
{
name: "curve (none)",
protocol: types.ProtocolCurve,
wantCount: 0,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
pools, err := cache.GetByProtocol(ctx, tt.protocol)
if err != nil {
t.Fatalf("GetByProtocol() error: %v", err)
}
if len(pools) != tt.wantCount {
t.Errorf("GetByProtocol() count = %d, want %d", len(pools), tt.wantCount)
}
})
}
}
func TestPoolCache_GetByLiquidity(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
// Add pools with different liquidity
pool1 := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
pool1.Liquidity = big.NewInt(1000)
pool2 := createTestPool("0x4444", "0x5555", "0x6666", types.ProtocolUniswapV2)
pool2.Liquidity = big.NewInt(5000)
pool3 := createTestPool("0x7777", "0x8888", "0x9999", types.ProtocolUniswapV3)
pool3.Liquidity = big.NewInt(10000)
cache.Add(ctx, pool1)
cache.Add(ctx, pool2)
cache.Add(ctx, pool3)
tests := []struct {
name string
minLiquidity *big.Int
limit int
wantCount int
wantFirst *big.Int // Expected liquidity of first result
}{
{
name: "all pools",
minLiquidity: big.NewInt(0),
limit: 0,
wantCount: 3,
wantFirst: big.NewInt(10000),
},
{
name: "min 2000",
minLiquidity: big.NewInt(2000),
limit: 0,
wantCount: 2,
wantFirst: big.NewInt(10000),
},
{
name: "limit 2",
minLiquidity: big.NewInt(0),
limit: 2,
wantCount: 2,
wantFirst: big.NewInt(10000),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
pools, err := cache.GetByLiquidity(ctx, tt.minLiquidity, tt.limit)
if err != nil {
t.Fatalf("GetByLiquidity() error: %v", err)
}
if len(pools) != tt.wantCount {
t.Errorf("GetByLiquidity() count = %d, want %d", len(pools), tt.wantCount)
}
if len(pools) > 0 && pools[0].Liquidity.Cmp(tt.wantFirst) != 0 {
t.Errorf("GetByLiquidity() first liquidity = %v, want %v", pools[0].Liquidity, tt.wantFirst)
}
})
}
}
func TestPoolCache_Update(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
pool := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
cache.Add(ctx, pool)
// Update reserves
err := cache.Update(ctx, pool.Address, func(p *types.PoolInfo) error {
p.Reserve0 = big.NewInt(9999999)
return nil
})
if err != nil {
t.Fatalf("Update() failed: %v", err)
}
// Verify update
retrieved, err := cache.GetByAddress(ctx, pool.Address)
if err != nil {
t.Fatalf("GetByAddress() failed: %v", err)
}
if retrieved.Reserve0.Cmp(big.NewInt(9999999)) != 0 {
t.Errorf("Update() reserve0 = %v, want %v", retrieved.Reserve0, big.NewInt(9999999))
}
}
func TestPoolCache_Update_NonExistent(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
err := cache.Update(ctx, common.HexToAddress("0x9999"), func(p *types.PoolInfo) error {
return nil
})
if err == nil {
t.Error("Update(non-existent) expected error, got nil")
}
}
func TestPoolCache_Update_Error(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
pool := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
cache.Add(ctx, pool)
// Update with error
testErr := fmt.Errorf("test error")
err := cache.Update(ctx, pool.Address, func(p *types.PoolInfo) error {
return testErr
})
if err != testErr {
t.Errorf("Update() error = %v, want %v", err, testErr)
}
}
func TestPoolCache_Update_InvalidAfterUpdate(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
pool := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
cache.Add(ctx, pool)
// Make pool invalid
err := cache.Update(ctx, pool.Address, func(p *types.PoolInfo) error {
p.Token0Decimals = 0 // Invalid
return nil
})
if err == nil {
t.Error("Update(invalid) expected error, got nil")
}
}
func TestPoolCache_Remove(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
pool := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
cache.Add(ctx, pool)
// Remove pool
err := cache.Remove(ctx, pool.Address)
if err != nil {
t.Fatalf("Remove() failed: %v", err)
}
// Verify removal
_, err = cache.GetByAddress(ctx, pool.Address)
if err == nil {
t.Error("GetByAddress() after Remove() expected error, got nil")
}
// Verify removed from token pair index
pools, _ := cache.GetByTokenPair(ctx, pool.Token0, pool.Token1)
if len(pools) != 0 {
t.Error("Pool still in token pair index after removal")
}
// Verify removed from protocol index
pools, _ = cache.GetByProtocol(ctx, pool.Protocol)
if len(pools) != 0 {
t.Error("Pool still in protocol index after removal")
}
}
func TestPoolCache_Remove_NonExistent(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
err := cache.Remove(ctx, common.HexToAddress("0x9999"))
if err == nil {
t.Error("Remove(non-existent) expected error, got nil")
}
}
func TestPoolCache_Count(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
// Initially empty
count, err := cache.Count(ctx)
if err != nil {
t.Fatalf("Count() failed: %v", err)
}
if count != 0 {
t.Errorf("Count() = %d, want 0", count)
}
// Add pools
pool1 := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
pool2 := createTestPool("0x4444", "0x5555", "0x6666", types.ProtocolUniswapV3)
cache.Add(ctx, pool1)
cache.Add(ctx, pool2)
count, err = cache.Count(ctx)
if err != nil {
t.Fatalf("Count() failed: %v", err)
}
if count != 2 {
t.Errorf("Count() = %d, want 2", count)
}
}
func TestPoolCache_Clear(t *testing.T) {
ctx := context.Background()
cache := NewPoolCache()
// Add pools
pool1 := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
pool2 := createTestPool("0x4444", "0x5555", "0x6666", types.ProtocolUniswapV3)
cache.Add(ctx, pool1)
cache.Add(ctx, pool2)
// Clear cache
err := cache.Clear(ctx)
if err != nil {
t.Fatalf("Clear() failed: %v", err)
}
// Verify cleared
count, _ := cache.Count(ctx)
if count != 0 {
t.Errorf("Count() after Clear() = %d, want 0", count)
}
}
func Test_makeTokenPairKey(t *testing.T) {
token0 := common.HexToAddress("0x1111")
token1 := common.HexToAddress("0x2222")
// Should be consistent regardless of order
key1 := makeTokenPairKey(token0, token1)
key2 := makeTokenPairKey(token1, token0)
if key1 != key2 {
t.Errorf("makeTokenPairKey() not consistent: %s != %s", key1, key2)
}
}
func Test_removePoolFromSlice(t *testing.T) {
pool1 := createTestPool("0x1111", "0x2222", "0x3333", types.ProtocolUniswapV2)
pool2 := createTestPool("0x4444", "0x5555", "0x6666", types.ProtocolUniswapV3)
pool3 := createTestPool("0x7777", "0x8888", "0x9999", types.ProtocolCurve)
pools := []*types.PoolInfo{pool1, pool2, pool3}
// Remove middle pool
result := removePoolFromSlice(pools, pool2.Address)
if len(result) != 2 {
t.Errorf("removePoolFromSlice() length = %d, want 2", len(result))
}
if result[0].Address != pool1.Address || result[1].Address != pool3.Address {
t.Error("removePoolFromSlice() incorrect pools remaining")
}
// Remove non-existent pool
result = removePoolFromSlice(result, common.HexToAddress("0x9999"))
if len(result) != 2 {
t.Errorf("removePoolFromSlice(non-existent) length = %d, want 2", len(result))
}
}

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package observability
import (
"context"
"log/slog"
"testing"
)
func TestNewLogger(t *testing.T) {
logger := NewLogger(slog.LevelInfo)
if logger == nil {
t.Fatal("NewLogger returned nil")
}
}
func TestLogger_Debug(t *testing.T) {
logger := NewLogger(slog.LevelDebug)
// Should not panic
logger.Debug("test message", "key", "value")
}
func TestLogger_Info(t *testing.T) {
logger := NewLogger(slog.LevelInfo)
// Should not panic
logger.Info("test message", "key", "value")
}
func TestLogger_Warn(t *testing.T) {
logger := NewLogger(slog.LevelWarn)
// Should not panic
logger.Warn("test message", "key", "value")
}
func TestLogger_Error(t *testing.T) {
logger := NewLogger(slog.LevelError)
// Should not panic
logger.Error("test message", "key", "value")
}
func TestLogger_With(t *testing.T) {
logger := NewLogger(slog.LevelInfo)
contextLogger := logger.With("component", "test")
if contextLogger == nil {
t.Fatal("With() returned nil")
}
// Should not panic
contextLogger.Info("test message")
}
func TestLogger_WithContext(t *testing.T) {
logger := NewLogger(slog.LevelInfo)
ctx := context.Background()
contextLogger := logger.WithContext(ctx)
if contextLogger == nil {
t.Fatal("WithContext() returned nil")
}
// Should not panic
contextLogger.Info("test message")
}
func TestLogger_AllLevels(t *testing.T) {
levels := []slog.Level{
slog.LevelDebug,
slog.LevelInfo,
slog.LevelWarn,
slog.LevelError,
}
for _, level := range levels {
logger := NewLogger(level)
if logger == nil {
t.Errorf("NewLogger(%v) returned nil", level)
}
// All log methods should work regardless of level
logger.Debug("debug")
logger.Info("info")
logger.Warn("warn")
logger.Error("error")
}
}

65
pkg/observability/metrics_test.go Normal file
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package observability
import (
"testing"
)
func TestNewMetrics(t *testing.T) {
metrics := NewMetrics("test")
if metrics == nil {
t.Fatal("NewMetrics returned nil")
}
}
func TestMetrics_RecordSwapEvent(t *testing.T) {
metrics := NewMetrics("test")
// Should not panic
metrics.RecordSwapEvent("uniswap-v2", true)
metrics.RecordSwapEvent("uniswap-v3", false)
}
func TestMetrics_RecordParseLatency(t *testing.T) {
metrics := NewMetrics("test")
// Should not panic
metrics.RecordParseLatency("uniswap-v2", 0.005)
metrics.RecordParseLatency("uniswap-v3", 0.003)
}
func TestMetrics_RecordArbitrageOpportunity(t *testing.T) {
metrics := NewMetrics("test")
// Should not panic
metrics.RecordArbitrageOpportunity(0.1)
metrics.RecordArbitrageOpportunity(0.5)
}
func TestMetrics_RecordExecution(t *testing.T) {
metrics := NewMetrics("test")
// Should not panic
metrics.RecordExecution(true, 0.05)
metrics.RecordExecution(false, -0.01)
}
func TestMetrics_PoolCacheSize(t *testing.T) {
metrics := NewMetrics("test")
// Should not panic
metrics.IncrementPoolCacheSize()
metrics.IncrementPoolCacheSize()
metrics.DecrementPoolCacheSize()
}
func TestMetrics_AllMethods(t *testing.T) {
metrics := NewMetrics("test")
// Test all methods in sequence
metrics.RecordSwapEvent("uniswap-v2", true)
metrics.RecordParseLatency("uniswap-v2", 0.004)
metrics.RecordArbitrageOpportunity(0.08)
metrics.RecordExecution(true, 0.05)
metrics.IncrementPoolCacheSize()
metrics.DecrementPoolCacheSize()
}

104
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package parsers
import (
"context"
"fmt"
"sync"
"github.com/ethereum/go-ethereum/core/types"
mevtypes "github.com/your-org/mev-bot/pkg/types"
)
// factory implements the Factory interface
type factory struct {
parsers map[mevtypes.ProtocolType]Parser
mu sync.RWMutex
}
// NewFactory creates a new parser factory
func NewFactory() Factory {
return &factory{
parsers: make(map[mevtypes.ProtocolType]Parser),
}
}
// RegisterParser registers a parser for a protocol
func (f *factory) RegisterParser(protocol mevtypes.ProtocolType, parser Parser) error {
if protocol == mevtypes.ProtocolUnknown {
return fmt.Errorf("cannot register parser for unknown protocol")
}
if parser == nil {
return fmt.Errorf("parser cannot be nil")
}
f.mu.Lock()
defer f.mu.Unlock()
if _, exists := f.parsers[protocol]; exists {
return fmt.Errorf("parser for protocol %s already registered", protocol)
}
f.parsers[protocol] = parser
return nil
}
// GetParser returns a parser for the given protocol
func (f *factory) GetParser(protocol mevtypes.ProtocolType) (Parser, error) {
f.mu.RLock()
defer f.mu.RUnlock()
parser, exists := f.parsers[protocol]
if !exists {
return nil, fmt.Errorf("no parser registered for protocol %s", protocol)
}
return parser, nil
}
// ParseLog routes a log to the appropriate parser
func (f *factory) ParseLog(ctx context.Context, log types.Log, tx *types.Transaction) (*mevtypes.SwapEvent, error) {
f.mu.RLock()
defer f.mu.RUnlock()
// Try each registered parser
for _, parser := range f.parsers {
if parser.SupportsLog(log) {
return parser.ParseLog(ctx, log, tx)
}
}
return nil, mevtypes.ErrUnsupportedProtocol
}
// ParseTransaction parses all swap events from a transaction
func (f *factory) ParseTransaction(ctx context.Context, tx *types.Transaction, receipt *types.Receipt) ([]*mevtypes.SwapEvent, error) {
if receipt == nil {
return nil, fmt.Errorf("receipt cannot be nil")
}
f.mu.RLock()
defer f.mu.RUnlock()
var allEvents []*mevtypes.SwapEvent
// Try each log with all parsers
for _, log := range receipt.Logs {
for _, parser := range f.parsers {
if parser.SupportsLog(*log) {
event, err := parser.ParseLog(ctx, *log, tx)
if err != nil {
// Log error but continue with other parsers
continue
}
if event != nil {
allEvents = append(allEvents, event)
}
break // Found parser for this log, move to next log
}
}
}
return allEvents, nil
}

407
pkg/parsers/factory_test.go Normal file
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package parsers
import (
"context"
"math/big"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
mevtypes "github.com/your-org/mev-bot/pkg/types"
)
// mockParser is a mock implementation of Parser for testing
type mockParser struct {
protocol mevtypes.ProtocolType
supportsLog func(types.Log) bool
parseLog func(context.Context, types.Log, *types.Transaction) (*mevtypes.SwapEvent, error)
parseReceipt func(context.Context, *types.Receipt, *types.Transaction) ([]*mevtypes.SwapEvent, error)
}
func (m *mockParser) ParseLog(ctx context.Context, log types.Log, tx *types.Transaction) (*mevtypes.SwapEvent, error) {
if m.parseLog != nil {
return m.parseLog(ctx, log, tx)
}
return nil, nil
}
func (m *mockParser) ParseReceipt(ctx context.Context, receipt *types.Receipt, tx *types.Transaction) ([]*mevtypes.SwapEvent, error) {
if m.parseReceipt != nil {
return m.parseReceipt(ctx, receipt, tx)
}
return nil, nil
}
func (m *mockParser) SupportsLog(log types.Log) bool {
if m.supportsLog != nil {
return m.supportsLog(log)
}
return false
}
func (m *mockParser) Protocol() mevtypes.ProtocolType {
return m.protocol
}
func TestNewFactory(t *testing.T) {
factory := NewFactory()
if factory == nil {
t.Fatal("NewFactory returned nil")
}
}
func TestFactory_RegisterParser(t *testing.T) {
tests := []struct {
name string
protocol mevtypes.ProtocolType
parser Parser
wantErr bool
errString string
}{
{
name: "valid registration",
protocol: mevtypes.ProtocolUniswapV2,
parser: &mockParser{protocol: mevtypes.ProtocolUniswapV2},
wantErr: false,
},
{
name: "unknown protocol",
protocol: mevtypes.ProtocolUnknown,
parser: &mockParser{protocol: mevtypes.ProtocolUnknown},
wantErr: true,
errString: "cannot register parser for unknown protocol",
},
{
name: "nil parser",
protocol: mevtypes.ProtocolUniswapV2,
parser: nil,
wantErr: true,
errString: "parser cannot be nil",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
factory := NewFactory()
err := factory.RegisterParser(tt.protocol, tt.parser)
if tt.wantErr {
if err == nil {
t.Errorf("RegisterParser() expected error, got nil")
return
}
if tt.errString != "" && err.Error() != tt.errString {
t.Errorf("RegisterParser() error = %v, want %v", err.Error(), tt.errString)
}
} else {
if err != nil {
t.Errorf("RegisterParser() unexpected error: %v", err)
}
}
})
}
}
func TestFactory_RegisterParser_Duplicate(t *testing.T) {
factory := NewFactory()
parser := &mockParser{protocol: mevtypes.ProtocolUniswapV2}
// First registration should succeed
err := factory.RegisterParser(mevtypes.ProtocolUniswapV2, parser)
if err != nil {
t.Fatalf("First RegisterParser() failed: %v", err)
}
// Second registration should fail
err = factory.RegisterParser(mevtypes.ProtocolUniswapV2, parser)
if err == nil {
t.Error("RegisterParser() expected error for duplicate registration, got nil")
}
}
func TestFactory_GetParser(t *testing.T) {
factory := NewFactory()
parser := &mockParser{protocol: mevtypes.ProtocolUniswapV2}
// Register parser
err := factory.RegisterParser(mevtypes.ProtocolUniswapV2, parser)
if err != nil {
t.Fatalf("RegisterParser() failed: %v", err)
}
tests := []struct {
name string
protocol mevtypes.ProtocolType
wantErr bool
}{
{
name: "get registered parser",
protocol: mevtypes.ProtocolUniswapV2,
wantErr: false,
},
{
name: "get unregistered parser",
protocol: mevtypes.ProtocolUniswapV3,
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := factory.GetParser(tt.protocol)
if tt.wantErr {
if err == nil {
t.Error("GetParser() expected error, got nil")
}
if got != nil {
t.Error("GetParser() expected nil parser on error")
}
} else {
if err != nil {
t.Errorf("GetParser() unexpected error: %v", err)
}
if got == nil {
t.Error("GetParser() returned nil parser")
}
}
})
}
}
func TestFactory_ParseLog(t *testing.T) {
ctx := context.Background()
// Create test log
testLog := types.Log{
Address: common.HexToAddress("0x1234"),
Topics: []common.Hash{common.HexToHash("0xabcd")},
Data: []byte{},
}
testTx := types.NewTransaction(
0,
common.HexToAddress("0x1234"),
big.NewInt(0),
21000,
big.NewInt(1000000000),
nil,
)
tests := []struct {
name string
setupFactory func() Factory
log types.Log
tx *types.Transaction
wantErr bool
wantEvent bool
}{
{
name: "parser supports log",
setupFactory: func() Factory {
f := NewFactory()
parser := &mockParser{
protocol: mevtypes.ProtocolUniswapV2,
supportsLog: func(log types.Log) bool {
return true
},
parseLog: func(ctx context.Context, log types.Log, tx *types.Transaction) (*mevtypes.SwapEvent, error) {
return &mevtypes.SwapEvent{
Protocol: mevtypes.ProtocolUniswapV2,
}, nil
},
}
f.RegisterParser(mevtypes.ProtocolUniswapV2, parser)
return f
},
log: testLog,
tx: testTx,
wantErr: false,
wantEvent: true,
},
{
name: "no parser supports log",
setupFactory: func() Factory {
f := NewFactory()
parser := &mockParser{
protocol: mevtypes.ProtocolUniswapV2,
supportsLog: func(log types.Log) bool {
return false
},
}
f.RegisterParser(mevtypes.ProtocolUniswapV2, parser)
return f
},
log: testLog,
tx: testTx,
wantErr: true,
wantEvent: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
factory := tt.setupFactory()
event, err := factory.ParseLog(ctx, tt.log, tt.tx)
if tt.wantErr {
if err == nil {
t.Error("ParseLog() expected error, got nil")
}
} else {
if err != nil {
t.Errorf("ParseLog() unexpected error: %v", err)
}
}
if tt.wantEvent {
if event == nil {
t.Error("ParseLog() expected event, got nil")
}
} else {
if event != nil && !tt.wantErr {
t.Error("ParseLog() expected nil event")
}
}
})
}
}
func TestFactory_ParseTransaction(t *testing.T) {
ctx := context.Background()
testTx := types.NewTransaction(
0,
common.HexToAddress("0x1234"),
big.NewInt(0),
21000,
big.NewInt(1000000000),
nil,
)
testLog := &types.Log{
Address: common.HexToAddress("0x1234"),
Topics: []common.Hash{common.HexToHash("0xabcd")},
Data: []byte{},
}
testReceipt := &types.Receipt{
Logs: []*types.Log{testLog},
}
tests := []struct {
name string
setupFactory func() Factory
tx *types.Transaction
receipt *types.Receipt
wantErr bool
wantEvents int
}{
{
name: "parse transaction with events",
setupFactory: func() Factory {
f := NewFactory()
parser := &mockParser{
protocol: mevtypes.ProtocolUniswapV2,
supportsLog: func(log types.Log) bool {
return true
},
parseLog: func(ctx context.Context, log types.Log, tx *types.Transaction) (*mevtypes.SwapEvent, error) {
return &mevtypes.SwapEvent{
Protocol: mevtypes.ProtocolUniswapV2,
}, nil
},
}
f.RegisterParser(mevtypes.ProtocolUniswapV2, parser)
return f
},
tx: testTx,
receipt: testReceipt,
wantErr: false,
wantEvents: 1,
},
{
name: "parse transaction with no matching parsers",
setupFactory: func() Factory {
f := NewFactory()
parser := &mockParser{
protocol: mevtypes.ProtocolUniswapV2,
supportsLog: func(log types.Log) bool {
return false
},
}
f.RegisterParser(mevtypes.ProtocolUniswapV2, parser)
return f
},
tx: testTx,
receipt: testReceipt,
wantErr: false,
wantEvents: 0,
},
{
name: "nil receipt",
setupFactory: func() Factory {
return NewFactory()
},
tx: testTx,
receipt: nil,
wantErr: true,
wantEvents: 0,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
factory := tt.setupFactory()
events, err := factory.ParseTransaction(ctx, tt.tx, tt.receipt)
if tt.wantErr {
if err == nil {
t.Error("ParseTransaction() expected error, got nil")
}
} else {
if err != nil {
t.Errorf("ParseTransaction() unexpected error: %v", err)
}
}
if len(events) != tt.wantEvents {
t.Errorf("ParseTransaction() got %d events, want %d", len(events), tt.wantEvents)
}
})
}
}
func TestFactory_ConcurrentAccess(t *testing.T) {
factory := NewFactory()
// Test concurrent registration
done := make(chan bool)
for i := 0; i < 10; i++ {
go func(n int) {
protocol := mevtypes.ProtocolType(fmt.Sprintf("protocol-%d", n))
parser := &mockParser{protocol: protocol}
factory.RegisterParser(protocol, parser)
done <- true
}(i)
}
for i := 0; i < 10; i++ {
<-done
}
// Test concurrent reads
for i := 0; i < 10; i++ {
go func(n int) {
protocol := mevtypes.ProtocolType(fmt.Sprintf("protocol-%d", n))
factory.GetParser(protocol)
done <- true
}(i)
}
for i := 0; i < 10; i++ {
<-done
}
}

286
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package types
import (
"math/big"
"testing"
"github.com/ethereum/go-ethereum/common"
)
func TestPoolInfo_Validate(t *testing.T) {
validPool := &PoolInfo{
Address: common.HexToAddress("0x1111"),
Protocol: ProtocolUniswapV2,
PoolType: "constant-product",
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Token0Decimals: 18,
Token1Decimals: 6,
Reserve0: big.NewInt(1000000),
Reserve1: big.NewInt(500000),
IsActive: true,
}
tests := []struct {
name string
pool *PoolInfo
wantErr error
}{
{
name: "valid pool",
pool: validPool,
wantErr: nil,
},
{
name: "invalid pool address",
pool: &PoolInfo{
Address: common.Address{},
Protocol: ProtocolUniswapV2,
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Token0Decimals: 18,
Token1Decimals: 6,
},
wantErr: ErrInvalidPoolAddress,
},
{
name: "invalid token0 address",
pool: &PoolInfo{
Address: common.HexToAddress("0x1111"),
Protocol: ProtocolUniswapV2,
Token0: common.Address{},
Token1: common.HexToAddress("0x3333"),
Token0Decimals: 18,
Token1Decimals: 6,
},
wantErr: ErrInvalidToken0Address,
},
{
name: "invalid token1 address",
pool: &PoolInfo{
Address: common.HexToAddress("0x1111"),
Protocol: ProtocolUniswapV2,
Token0: common.HexToAddress("0x2222"),
Token1: common.Address{},
Token0Decimals: 18,
Token1Decimals: 6,
},
wantErr: ErrInvalidToken1Address,
},
{
name: "invalid token0 decimals - zero",
pool: &PoolInfo{
Address: common.HexToAddress("0x1111"),
Protocol: ProtocolUniswapV2,
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Token0Decimals: 0,
Token1Decimals: 6,
},
wantErr: ErrInvalidToken0Decimals,
},
{
name: "invalid token0 decimals - too high",
pool: &PoolInfo{
Address: common.HexToAddress("0x1111"),
Protocol: ProtocolUniswapV2,
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Token0Decimals: 19,
Token1Decimals: 6,
},
wantErr: ErrInvalidToken0Decimals,
},
{
name: "invalid token1 decimals - zero",
pool: &PoolInfo{
Address: common.HexToAddress("0x1111"),
Protocol: ProtocolUniswapV2,
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Token0Decimals: 18,
Token1Decimals: 0,
},
wantErr: ErrInvalidToken1Decimals,
},
{
name: "invalid token1 decimals - too high",
pool: &PoolInfo{
Address: common.HexToAddress("0x1111"),
Protocol: ProtocolUniswapV2,
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Token0Decimals: 18,
Token1Decimals: 19,
},
wantErr: ErrInvalidToken1Decimals,
},
{
name: "unknown protocol",
pool: &PoolInfo{
Address: common.HexToAddress("0x1111"),
Protocol: ProtocolUnknown,
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Token0Decimals: 18,
Token1Decimals: 6,
},
wantErr: ErrUnknownProtocol,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
err := tt.pool.Validate()
if err != tt.wantErr {
t.Errorf("Validate() error = %v, want %v", err, tt.wantErr)
}
})
}
}
func TestPoolInfo_GetTokenPair(t *testing.T) {
tests := []struct {
name string
pool *PoolInfo
wantToken0 common.Address
wantToken1 common.Address
}{
{
name: "token0 < token1",
pool: &PoolInfo{
Token0: common.HexToAddress("0x1111"),
Token1: common.HexToAddress("0x2222"),
},
wantToken0: common.HexToAddress("0x1111"),
wantToken1: common.HexToAddress("0x2222"),
},
{
name: "token1 < token0",
pool: &PoolInfo{
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x1111"),
},
wantToken0: common.HexToAddress("0x1111"),
wantToken1: common.HexToAddress("0x2222"),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
token0, token1 := tt.pool.GetTokenPair()
if token0 != tt.wantToken0 {
t.Errorf("GetTokenPair() token0 = %v, want %v", token0, tt.wantToken0)
}
if token1 != tt.wantToken1 {
t.Errorf("GetTokenPair() token1 = %v, want %v", token1, tt.wantToken1)
}
})
}
}
func TestPoolInfo_CalculatePrice(t *testing.T) {
tests := []struct {
name string
pool *PoolInfo
wantPrice string // String representation for comparison
}{
{
name: "equal decimals",
pool: &PoolInfo{
Token0Decimals: 18,
Token1Decimals: 18,
Reserve0: big.NewInt(1000000000000000000), // 1e18
Reserve1: big.NewInt(2000000000000000000), // 2e18
},
wantPrice: "2",
},
{
name: "different decimals - USDC/WETH",
pool: &PoolInfo{
Token0Decimals: 6, // USDC
Token1Decimals: 18, // WETH
Reserve0: big.NewInt(1000000), // 1 USDC
Reserve1: big.NewInt(1000000000000000000), // 1 WETH
},
wantPrice: "1000000000000", // 1 WETH = 1,000,000,000,000 scaled USDC
},
{
name: "zero reserve0",
pool: &PoolInfo{
Token0Decimals: 18,
Token1Decimals: 18,
Reserve0: big.NewInt(0),
Reserve1: big.NewInt(1000),
},
wantPrice: "0",
},
{
name: "nil reserves",
pool: &PoolInfo{
Token0Decimals: 18,
Token1Decimals: 18,
Reserve0: nil,
Reserve1: nil,
},
wantPrice: "0",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
price := tt.pool.CalculatePrice()
if price.String() != tt.wantPrice {
t.Errorf("CalculatePrice() = %v, want %v", price.String(), tt.wantPrice)
}
})
}
}
func Test_scaleToDecimals(t *testing.T) {
tests := []struct {
name string
amount *big.Int
fromDecimals uint8
toDecimals uint8
want *big.Int
}{
{
name: "same decimals",
amount: big.NewInt(1000),
fromDecimals: 18,
toDecimals: 18,
want: big.NewInt(1000),
},
{
name: "scale up - 6 to 18 decimals",
amount: big.NewInt(1000000), // 1 USDC (6 decimals)
fromDecimals: 6,
toDecimals: 18,
want: new(big.Int).Mul(big.NewInt(1000000), new(big.Int).Exp(big.NewInt(10), big.NewInt(12), nil)),
},
{
name: "scale down - 18 to 6 decimals",
amount: new(big.Int).Mul(big.NewInt(1), new(big.Int).Exp(big.NewInt(10), big.NewInt(18), nil)), // 1 ETH
fromDecimals: 18,
toDecimals: 6,
want: big.NewInt(1000000),
},
{
name: "scale up - 8 to 18 decimals (WBTC to ETH)",
amount: big.NewInt(100000000), // 1 WBTC (8 decimals)
fromDecimals: 8,
toDecimals: 18,
want: new(big.Int).Mul(big.NewInt(100000000), new(big.Int).Exp(big.NewInt(10), big.NewInt(10), nil)),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := scaleToDecimals(tt.amount, tt.fromDecimals, tt.toDecimals)
if got.Cmp(tt.want) != 0 {
t.Errorf("scaleToDecimals() = %v, want %v", got, tt.want)
}
})
}
}

259
pkg/types/swap_test.go Normal file
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package types
import (
"math/big"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
)
func TestSwapEvent_Validate(t *testing.T) {
validEvent := &SwapEvent{
TxHash: common.HexToHash("0x1234"),
BlockNumber: 1000,
LogIndex: 0,
Timestamp: time.Now(),
PoolAddress: common.HexToAddress("0x1111"),
Protocol: ProtocolUniswapV2,
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Token0Decimals: 18,
Token1Decimals: 6,
Amount0In: big.NewInt(1000),
Amount1In: big.NewInt(0),
Amount0Out: big.NewInt(0),
Amount1Out: big.NewInt(500),
Sender: common.HexToAddress("0x4444"),
Recipient: common.HexToAddress("0x5555"),
}
tests := []struct {
name string
event *SwapEvent
wantErr error
}{
{
name: "valid event",
event: validEvent,
wantErr: nil,
},
{
name: "invalid tx hash",
event: &SwapEvent{
TxHash: common.Hash{},
PoolAddress: common.HexToAddress("0x1111"),
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Protocol: ProtocolUniswapV2,
Amount0In: big.NewInt(1000),
},
wantErr: ErrInvalidTxHash,
},
{
name: "invalid pool address",
event: &SwapEvent{
TxHash: common.HexToHash("0x1234"),
PoolAddress: common.Address{},
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Protocol: ProtocolUniswapV2,
Amount0In: big.NewInt(1000),
},
wantErr: ErrInvalidPoolAddress,
},
{
name: "invalid token0 address",
event: &SwapEvent{
TxHash: common.HexToHash("0x1234"),
PoolAddress: common.HexToAddress("0x1111"),
Token0: common.Address{},
Token1: common.HexToAddress("0x3333"),
Protocol: ProtocolUniswapV2,
Amount0In: big.NewInt(1000),
},
wantErr: ErrInvalidToken0Address,
},
{
name: "invalid token1 address",
event: &SwapEvent{
TxHash: common.HexToHash("0x1234"),
PoolAddress: common.HexToAddress("0x1111"),
Token0: common.HexToAddress("0x2222"),
Token1: common.Address{},
Protocol: ProtocolUniswapV2,
Amount0In: big.NewInt(1000),
},
wantErr: ErrInvalidToken1Address,
},
{
name: "unknown protocol",
event: &SwapEvent{
TxHash: common.HexToHash("0x1234"),
PoolAddress: common.HexToAddress("0x1111"),
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Protocol: ProtocolUnknown,
Amount0In: big.NewInt(1000),
},
wantErr: ErrUnknownProtocol,
},
{
name: "zero amounts",
event: &SwapEvent{
TxHash: common.HexToHash("0x1234"),
PoolAddress: common.HexToAddress("0x1111"),
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Protocol: ProtocolUniswapV2,
Amount0In: big.NewInt(0),
Amount1In: big.NewInt(0),
Amount0Out: big.NewInt(0),
Amount1Out: big.NewInt(0),
},
wantErr: ErrZeroAmounts,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
err := tt.event.Validate()
if err != tt.wantErr {
t.Errorf("Validate() error = %v, want %v", err, tt.wantErr)
}
})
}
}
func TestSwapEvent_GetInputToken(t *testing.T) {
tests := []struct {
name string
event *SwapEvent
wantToken common.Address
wantAmount *big.Int
}{
{
name: "token0 input",
event: &SwapEvent{
Token0: common.HexToAddress("0x1111"),
Token1: common.HexToAddress("0x2222"),
Amount0In: big.NewInt(1000),
Amount1In: big.NewInt(0),
Amount0Out: big.NewInt(0),
Amount1Out: big.NewInt(500),
},
wantToken: common.HexToAddress("0x1111"),
wantAmount: big.NewInt(1000),
},
{
name: "token1 input",
event: &SwapEvent{
Token0: common.HexToAddress("0x1111"),
Token1: common.HexToAddress("0x2222"),
Amount0In: big.NewInt(0),
Amount1In: big.NewInt(500),
Amount0Out: big.NewInt(1000),
Amount1Out: big.NewInt(0),
},
wantToken: common.HexToAddress("0x2222"),
wantAmount: big.NewInt(500),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
token, amount := tt.event.GetInputToken()
if token != tt.wantToken {
t.Errorf("GetInputToken() token = %v, want %v", token, tt.wantToken)
}
if amount.Cmp(tt.wantAmount) != 0 {
t.Errorf("GetInputToken() amount = %v, want %v", amount, tt.wantAmount)
}
})
}
}
func TestSwapEvent_GetOutputToken(t *testing.T) {
tests := []struct {
name string
event *SwapEvent
wantToken common.Address
wantAmount *big.Int
}{
{
name: "token0 output",
event: &SwapEvent{
Token0: common.HexToAddress("0x1111"),
Token1: common.HexToAddress("0x2222"),
Amount0In: big.NewInt(0),
Amount1In: big.NewInt(500),
Amount0Out: big.NewInt(1000),
Amount1Out: big.NewInt(0),
},
wantToken: common.HexToAddress("0x1111"),
wantAmount: big.NewInt(1000),
},
{
name: "token1 output",
event: &SwapEvent{
Token0: common.HexToAddress("0x1111"),
Token1: common.HexToAddress("0x2222"),
Amount0In: big.NewInt(1000),
Amount1In: big.NewInt(0),
Amount0Out: big.NewInt(0),
Amount1Out: big.NewInt(500),
},
wantToken: common.HexToAddress("0x2222"),
wantAmount: big.NewInt(500),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
token, amount := tt.event.GetOutputToken()
if token != tt.wantToken {
t.Errorf("GetOutputToken() token = %v, want %v", token, tt.wantToken)
}
if amount.Cmp(tt.wantAmount) != 0 {
t.Errorf("GetOutputToken() amount = %v, want %v", amount, tt.wantAmount)
}
})
}
}
func Test_isZero(t *testing.T) {
tests := []struct {
name string
n *big.Int
want bool
}{
{
name: "nil is zero",
n: nil,
want: true,
},
{
name: "zero value is zero",
n: big.NewInt(0),
want: true,
},
{
name: "positive value is not zero",
n: big.NewInt(100),
want: false,
},
{
name: "negative value is not zero",
n: big.NewInt(-100),
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := isZero(tt.n); got != tt.want {
t.Errorf("isZero() = %v, want %v", got, tt.want)
}
})
}
}

141
pkg/validation/validator.go Normal file
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package validation
import (
"context"
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/your-org/mev-bot/pkg/types"
)
// validator implements the Validator interface
type validator struct {
rules *ValidationRules
}
// NewValidator creates a new validator with the given rules
func NewValidator(rules *ValidationRules) Validator {
if rules == nil {
rules = DefaultValidationRules()
}
return &validator{
rules: rules,
}
}
// ValidateSwapEvent validates a swap event
func (v *validator) ValidateSwapEvent(ctx context.Context, event *types.SwapEvent) error {
if event == nil {
return fmt.Errorf("event cannot be nil")
}
// First, run built-in validation
if err := event.Validate(); err != nil {
return err
}
// Additional validation based on rules
if v.rules.RejectZeroAddresses {
if event.Token0 == (common.Address{}) || event.Token1 == (common.Address{}) {
return types.ErrInvalidToken0Address
}
}
if v.rules.RejectZeroAmounts {
if isZero(event.Amount0In) && isZero(event.Amount1In) &&
isZero(event.Amount0Out) && isZero(event.Amount1Out) {
return types.ErrZeroAmounts
}
}
// Check amount thresholds
amounts := []*big.Int{event.Amount0In, event.Amount1In, event.Amount0Out, event.Amount1Out}
for _, amount := range amounts {
if amount == nil || amount.Sign() == 0 {
continue
}
if v.rules.MinAmount != nil && amount.Cmp(v.rules.MinAmount) < 0 {
return fmt.Errorf("amount %s below minimum %s", amount.String(), v.rules.MinAmount.String())
}
if v.rules.MaxAmount != nil && amount.Cmp(v.rules.MaxAmount) > 0 {
return fmt.Errorf("amount %s exceeds maximum %s", amount.String(), v.rules.MaxAmount.String())
}
}
// Check if protocol is allowed
if len(v.rules.AllowedProtocols) > 0 {
if !v.rules.AllowedProtocols[event.Protocol] {
return fmt.Errorf("protocol %s not allowed", event.Protocol)
}
}
// Check blacklisted pools
if v.rules.BlacklistedPools[event.PoolAddress] {
return fmt.Errorf("pool %s is blacklisted", event.PoolAddress.Hex())
}
// Check blacklisted tokens
if v.rules.BlacklistedTokens[event.Token0] || v.rules.BlacklistedTokens[event.Token1] {
return fmt.Errorf("blacklisted token in swap")
}
return nil
}
// ValidatePoolInfo validates pool information
func (v *validator) ValidatePoolInfo(ctx context.Context, pool *types.PoolInfo) error {
if pool == nil {
return fmt.Errorf("pool cannot be nil")
}
// Run built-in validation
if err := pool.Validate(); err != nil {
return err
}
// Check if protocol is allowed
if len(v.rules.AllowedProtocols) > 0 {
if !v.rules.AllowedProtocols[pool.Protocol] {
return fmt.Errorf("protocol %s not allowed", pool.Protocol)
}
}
// Check blacklisted pool
if v.rules.BlacklistedPools[pool.Address] {
return fmt.Errorf("pool %s is blacklisted", pool.Address.Hex())
}
// Check blacklisted tokens
if v.rules.BlacklistedTokens[pool.Token0] || v.rules.BlacklistedTokens[pool.Token1] {
return fmt.Errorf("blacklisted token in pool")
}
return nil
}
// FilterValid filters a slice of swap events, returning only valid ones
func (v *validator) FilterValid(ctx context.Context, events []*types.SwapEvent) []*types.SwapEvent {
var valid []*types.SwapEvent
for _, event := range events {
if err := v.ValidateSwapEvent(ctx, event); err == nil {
valid = append(valid, event)
}
}
return valid
}
// GetValidationRules returns the current validation rules
func (v *validator) GetValidationRules() *ValidationRules {
return v.rules
}
// isZero checks if a big.Int is nil or zero
func isZero(n *big.Int) bool {
return n == nil || n.Sign() == 0
}

395
pkg/validation/validator_test.go Normal file
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package validation
import (
"context"
"math/big"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/your-org/mev-bot/pkg/types"
)
func createValidSwapEvent() *types.SwapEvent {
return &types.SwapEvent{
TxHash: common.HexToHash("0x1234"),
BlockNumber: 1000,
LogIndex: 0,
Timestamp: time.Now(),
PoolAddress: common.HexToAddress("0x1111"),
Protocol: types.ProtocolUniswapV2,
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Token0Decimals: 18,
Token1Decimals: 6,
Amount0In: big.NewInt(1000),
Amount1In: big.NewInt(0),
Amount0Out: big.NewInt(0),
Amount1Out: big.NewInt(500),
Sender: common.HexToAddress("0x4444"),
Recipient: common.HexToAddress("0x5555"),
}
}
func createValidPoolInfo() *types.PoolInfo {
return &types.PoolInfo{
Address: common.HexToAddress("0x1111"),
Protocol: types.ProtocolUniswapV2,
Token0: common.HexToAddress("0x2222"),
Token1: common.HexToAddress("0x3333"),
Token0Decimals: 18,
Token1Decimals: 6,
Reserve0: big.NewInt(1000000),
Reserve1: big.NewInt(500000),
IsActive: true,
}
}
func TestNewValidator(t *testing.T) {
validator := NewValidator(nil)
if validator == nil {
t.Fatal("NewValidator returned nil")
}
rules := DefaultValidationRules()
validator = NewValidator(rules)
if validator == nil {
t.Fatal("NewValidator with rules returned nil")
}
}
func TestDefaultValidationRules(t *testing.T) {
rules := DefaultValidationRules()
if rules == nil {
t.Fatal("DefaultValidationRules returned nil")
}
if !rules.RejectZeroAddresses {
t.Error("DefaultValidationRules RejectZeroAddresses should be true")
}
if !rules.RejectZeroAmounts {
t.Error("DefaultValidationRules RejectZeroAmounts should be true")
}
if rules.MinAmount == nil {
t.Error("DefaultValidationRules MinAmount should not be nil")
}
if rules.MaxAmount == nil {
t.Error("DefaultValidationRules MaxAmount should not be nil")
}
}
func TestValidator_ValidateSwapEvent(t *testing.T) {
ctx := context.Background()
tests := []struct {
name string
rules *ValidationRules
event *types.SwapEvent
wantErr bool
}{
{
name: "valid event with default rules",
rules: DefaultValidationRules(),
event: createValidSwapEvent(),
wantErr: false,
},
{
name: "nil event",
rules: DefaultValidationRules(),
event: nil,
wantErr: true,
},
{
name: "amount below minimum",
rules: DefaultValidationRules(),
event: func() *types.SwapEvent {
e := createValidSwapEvent()
e.Amount0In = big.NewInt(1) // Below default minimum
return e
}(),
wantErr: true,
},
{
name: "amount above maximum",
rules: &ValidationRules{
RejectZeroAddresses: true,
RejectZeroAmounts: true,
MinAmount: big.NewInt(1),
MaxAmount: big.NewInt(100),
AllowedProtocols: make(map[types.ProtocolType]bool),
BlacklistedPools: make(map[common.Address]bool),
BlacklistedTokens: make(map[common.Address]bool),
},
event: func() *types.SwapEvent {
e := createValidSwapEvent()
e.Amount0In = big.NewInt(1000) // Above maximum
return e
}(),
wantErr: true,
},
{
name: "protocol not allowed",
rules: &ValidationRules{
RejectZeroAddresses: true,
RejectZeroAmounts: true,
MinAmount: big.NewInt(1),
MaxAmount: big.NewInt(1e18),
AllowedProtocols: map[types.ProtocolType]bool{
types.ProtocolUniswapV3: true,
},
BlacklistedPools: make(map[common.Address]bool),
BlacklistedTokens: make(map[common.Address]bool),
},
event: createValidSwapEvent(), // UniswapV2
wantErr: true,
},
{
name: "blacklisted pool",
rules: &ValidationRules{
RejectZeroAddresses: true,
RejectZeroAmounts: true,
MinAmount: big.NewInt(1),
MaxAmount: big.NewInt(1e18),
AllowedProtocols: make(map[types.ProtocolType]bool),
BlacklistedPools: map[common.Address]bool{
common.HexToAddress("0x1111"): true,
},
BlacklistedTokens: make(map[common.Address]bool),
},
event: createValidSwapEvent(),
wantErr: true,
},
{
name: "blacklisted token",
rules: &ValidationRules{
RejectZeroAddresses: true,
RejectZeroAmounts: true,
MinAmount: big.NewInt(1),
MaxAmount: big.NewInt(1e18),
AllowedProtocols: make(map[types.ProtocolType]bool),
BlacklistedPools: make(map[common.Address]bool),
BlacklistedTokens: map[common.Address]bool{
common.HexToAddress("0x2222"): true,
},
},
event: createValidSwapEvent(),
wantErr: true,
},
{
name: "zero amounts when rejected",
rules: DefaultValidationRules(),
event: func() *types.SwapEvent {
e := createValidSwapEvent()
e.Amount0In = big.NewInt(0)
e.Amount1In = big.NewInt(0)
e.Amount0Out = big.NewInt(0)
e.Amount1Out = big.NewInt(0)
return e
}(),
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
validator := NewValidator(tt.rules)
err := validator.ValidateSwapEvent(ctx, tt.event)
if tt.wantErr {
if err == nil {
t.Error("ValidateSwapEvent() expected error, got nil")
}
} else {
if err != nil {
t.Errorf("ValidateSwapEvent() unexpected error: %v", err)
}
}
})
}
}
func TestValidator_ValidatePoolInfo(t *testing.T) {
ctx := context.Background()
tests := []struct {
name string
rules *ValidationRules
pool *types.PoolInfo
wantErr bool
}{
{
name: "valid pool with default rules",
rules: DefaultValidationRules(),
pool: createValidPoolInfo(),
wantErr: false,
},
{
name: "nil pool",
rules: DefaultValidationRules(),
pool: nil,
wantErr: true,
},
{
name: "protocol not allowed",
rules: &ValidationRules{
AllowedProtocols: map[types.ProtocolType]bool{
types.ProtocolUniswapV3: true,
},
BlacklistedPools: make(map[common.Address]bool),
BlacklistedTokens: make(map[common.Address]bool),
},
pool: createValidPoolInfo(), // UniswapV2
wantErr: true,
},
{
name: "blacklisted pool",
rules: &ValidationRules{
AllowedProtocols: make(map[types.ProtocolType]bool),
BlacklistedPools: map[common.Address]bool{
common.HexToAddress("0x1111"): true,
},
BlacklistedTokens: make(map[common.Address]bool),
},
pool: createValidPoolInfo(),
wantErr: true,
},
{
name: "blacklisted token",
rules: &ValidationRules{
AllowedProtocols: make(map[types.ProtocolType]bool),
BlacklistedPools: make(map[common.Address]bool),
BlacklistedTokens: map[common.Address]bool{
common.HexToAddress("0x2222"): true,
},
},
pool: createValidPoolInfo(),
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
validator := NewValidator(tt.rules)
err := validator.ValidatePoolInfo(ctx, tt.pool)
if tt.wantErr {
if err == nil {
t.Error("ValidatePoolInfo() expected error, got nil")
}
} else {
if err != nil {
t.Errorf("ValidatePoolInfo() unexpected error: %v", err)
}
}
})
}
}
func TestValidator_FilterValid(t *testing.T) {
ctx := context.Background()
validEvent1 := createValidSwapEvent()
validEvent2 := createValidSwapEvent()
validEvent2.PoolAddress = common.HexToAddress("0x9999")
invalidEvent := createValidSwapEvent()
invalidEvent.Amount0In = big.NewInt(0)
invalidEvent.Amount1In = big.NewInt(0)
invalidEvent.Amount0Out = big.NewInt(0)
invalidEvent.Amount1Out = big.NewInt(0)
tests := []struct {
name string
rules *ValidationRules
events []*types.SwapEvent
wantCount int
}{
{
name: "all valid events",
rules: DefaultValidationRules(),
events: []*types.SwapEvent{validEvent1, validEvent2},
wantCount: 2,
},
{
name: "mixed valid and invalid",
rules: DefaultValidationRules(),
events: []*types.SwapEvent{validEvent1, invalidEvent, validEvent2},
wantCount: 2,
},
{
name: "all invalid events",
rules: DefaultValidationRules(),
events: []*types.SwapEvent{invalidEvent},
wantCount: 0,
},
{
name: "empty slice",
rules: DefaultValidationRules(),
events: []*types.SwapEvent{},
wantCount: 0,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
validator := NewValidator(tt.rules)
valid := validator.FilterValid(ctx, tt.events)
if len(valid) != tt.wantCount {
t.Errorf("FilterValid() count = %d, want %d", len(valid), tt.wantCount)
}
})
}
}
func TestValidator_GetValidationRules(t *testing.T) {
rules := DefaultValidationRules()
validator := NewValidator(rules)
retrievedRules := validator.GetValidationRules()
if retrievedRules != rules {
t.Error("GetValidationRules() returned different rules")
}
}
func Test_isZero_Validation(t *testing.T) {
tests := []struct {
name string
n *big.Int
want bool
}{
{
name: "nil is zero",
n: nil,
want: true,
},
{
name: "zero value is zero",
n: big.NewInt(0),
want: true,
},
{
name: "positive value is not zero",
n: big.NewInt(100),
want: false,
},
{
name: "negative value is not zero",
n: big.NewInt(-100),
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := isZero(tt.n); got != tt.want {
t.Errorf("isZero() = %v, want %v", got, tt.want)
}
})
}
}