Add full monorepo: virtual-banker, backend, frontend, docs, scripts, deployment

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/swap/aggregator.go

@@ -0,0 +1,130 @@
+package swap
+
+import (
+	"context"
+	"fmt"
+)
+
+// Aggregator aggregates quotes from multiple DEX aggregators
+type Aggregator struct {
+	providers []QuoteProvider
+}
+
+// NewAggregator creates a new swap aggregator
+func NewAggregator() *Aggregator {
+	return &Aggregator{
+		providers: []QuoteProvider{
+			NewOneInchProvider(),
+			NewZeroXProvider(),
+			NewParaswapProvider(),
+		},
+	}
+}
+
+// QuoteProvider interface for DEX aggregators
+type QuoteProvider interface {
+	GetQuote(ctx context.Context, req *QuoteRequest) (*Quote, error)
+	Name() string
+}
+
+// QuoteRequest represents a swap quote request
+type QuoteRequest struct {
+	FromToken  string
+	ToToken    string
+	Amount     string
+	FromChain  int
+	ToChain    int
+	Slippage   float64
+}
+
+// Quote represents a swap quote
+type Quote struct {
+	Provider      string
+	FromToken     string
+	ToToken       string
+	FromAmount    string
+	ToAmount      string
+	EstimatedGas  string
+	PriceImpact   float64
+	Route         []RouteStep
+}
+
+// RouteStep represents a step in the swap route
+type RouteStep struct {
+	Protocol string
+	From     string
+	To       string
+}
+
+// GetBestQuote gets the best quote from all providers
+func (a *Aggregator) GetBestQuote(ctx context.Context, req *QuoteRequest) (*Quote, error) {
+	var bestQuote *Quote
+	var bestAmount string
+
+	for _, provider := range a.providers {
+		quote, err := provider.GetQuote(ctx, req)
+		if err != nil {
+			continue
+		}
+
+		if bestQuote == nil || quote.ToAmount > bestAmount {
+			bestQuote = quote
+			bestAmount = quote.ToAmount
+		}
+	}
+
+	if bestQuote == nil {
+		return nil, fmt.Errorf("no quotes available")
+	}
+
+	return bestQuote, nil
+}
+
+// OneInchProvider implements QuoteProvider for 1inch
+type OneInchProvider struct{}
+
+func NewOneInchProvider() *OneInchProvider {
+	return &OneInchProvider{}
+}
+
+func (p *OneInchProvider) Name() string {
+	return "1inch"
+}
+
+func (p *OneInchProvider) GetQuote(ctx context.Context, req *QuoteRequest) (*Quote, error) {
+	// Implementation would call 1inch API
+	return nil, fmt.Errorf("not implemented - requires 1inch API integration")
+}
+
+// ZeroXProvider implements QuoteProvider for 0x
+type ZeroXProvider struct{}
+
+func NewZeroXProvider() *ZeroXProvider {
+	return &ZeroXProvider{}
+}
+
+func (p *ZeroXProvider) Name() string {
+	return "0x"
+}
+
+func (p *ZeroXProvider) GetQuote(ctx context.Context, req *QuoteRequest) (*Quote, error) {
+	// Implementation would call 0x API
+	return nil, fmt.Errorf("not implemented - requires 0x API integration")
+}
+
+// ParaswapProvider implements QuoteProvider for Paraswap
+type ParaswapProvider struct{}
+
+func NewParaswapProvider() *ParaswapProvider {
+	return &ParaswapProvider{}
+}
+
+func (p *ParaswapProvider) Name() string {
+	return "Paraswap"
+}
+
+func (p *ParaswapProvider) GetQuote(ctx context.Context, req *QuoteRequest) (*Quote, error) {
+	// Implementation would call Paraswap API
+	return nil, fmt.Errorf("not implemented - requires Paraswap API integration")
+}
+