mev-beta/pkg/pools/pool_cache_adapter.go

package pools

import (
	"github.com/ethereum/go-ethereum/common"
	arbcommon "github.com/fraktal/mev-beta/pkg/arbitrum/common"
)

// PoolCacheAdapter adapts PoolDiscovery to implement interfaces.PoolCache
// This allows the EventParser to use PoolDiscovery as its pool cache
type PoolCacheAdapter struct {
	discovery *PoolDiscovery
}

// NewPoolCacheAdapter creates a new adapter wrapping a PoolDiscovery
func NewPoolCacheAdapter(discovery *PoolDiscovery) *PoolCacheAdapter {
	return &PoolCacheAdapter{
		discovery: discovery,
	}
}

// GetPool retrieves pool information from cache
func (a *PoolCacheAdapter) GetPool(address common.Address) *arbcommon.PoolInfo {
	if a.discovery == nil {
		return nil
	}

	// Get pool from discovery
	pool, exists := a.discovery.GetPool(address.Hex())
	if !exists || pool == nil {
		return nil
	}

	// Convert Pool to PoolInfo
	return &arbcommon.PoolInfo{
		Address:        common.HexToAddress(pool.Address),
		Protocol:       parseProtocol(pool.Protocol),
		PoolType:       parsePoolType(pool.Protocol),
		FactoryAddress: common.HexToAddress(pool.Factory),
		Token0:         common.HexToAddress(pool.Token0),
		Token1:         common.HexToAddress(pool.Token1),
		Fee:            pool.Fee,
		TotalLiquidity: pool.Liquidity,
	}
}

// GetPoolsByTokenPair retrieves pools for a specific token pair
func (a *PoolCacheAdapter) GetPoolsByTokenPair(token0, token1 common.Address) []*arbcommon.PoolInfo {
	if a.discovery == nil {
		return nil
	}

	// PoolDiscovery doesn't have a direct method for this yet
	// We'll return nil for now and implement this later if needed
	// This is acceptable as the parser only uses GetPool currently
	return nil
}

// parseProtocol converts protocol string to Protocol enum
func parseProtocol(protocol string) arbcommon.Protocol {
	switch protocol {
	case "uniswap-v2":
		return arbcommon.ProtocolUniswapV2
	case "uniswap-v3":
		return arbcommon.ProtocolUniswapV3
	case "sushiswap":
		return arbcommon.ProtocolSushiSwap
	case "camelot":
		return arbcommon.ProtocolCamelot
	case "curve":
		return arbcommon.ProtocolCurve
	case "balancer":
		return arbcommon.ProtocolBalancer
	default:
		return arbcommon.ProtocolUnknown
	}
}

// parsePoolType converts protocol string to PoolType enum
func parsePoolType(protocol string) arbcommon.PoolType {
	switch protocol {
	case "uniswap-v2", "sushiswap", "camelot":
		return arbcommon.PoolTypeV2
	case "uniswap-v3":
		return arbcommon.PoolTypeV3
	case "curve":
		return arbcommon.PoolTypeStableSwap
	case "balancer":
		return arbcommon.PoolTypeWeighted
	default:
		return arbcommon.PoolTypeUnknown
	}
}