feat: spin up multiple chains

cmd/main.go

@@ -52,5 +52,5 @@ func SupersimMain(ctx *cli.Context, closeApp context.CancelCauseFunc) (cliapp.Li
 	}
 
 	// use config and setup supersim
-	return supersim.NewSupersim(log), nil
+	return supersim.NewSupersim(log, &supersim.DefaultConfig), nil
 }

supersim.go

@@ -1,34 +1,77 @@
 package supersim
 
 import (
+	"fmt"
+
 	"context"
 
 	"github.com/ethereum-optimism/supersim/anvil"
 
 	"github.com/ethereum/go-ethereum/log"
 )
 
+
+
+type Config struct {
+	l1Chain anvil.Config
+	l2Chains []anvil.Config
+}
+
+var DefaultConfig = Config{
+	l1Chain: anvil.Config{ChainId: 1, Port: 8545},
+	l2Chains: []anvil.Config{{ChainId: 10, Port: 9545}, {ChainId: 30, Port: 9555}},
+}
+
 type Supersim struct {
 	log log.Logger
 
-	anvil *anvil.Anvil
+	l1Chain *anvil.Anvil
+	l2Chains map[uint64]*anvil.Anvil
+
 }
 
-func NewSupersim(log log.Logger) *Supersim {
-	anvil := anvil.New(log, &anvil.Config{ChainId: 10, Port: 9545})
-	return &Supersim{log, anvil}
+func NewSupersim(log log.Logger, config *Config) *Supersim {
+	l1Chain := anvil.New(log, &config.l1Chain)
+
+	l2Chains := make(map[uint64]*anvil.Anvil)
+	for _, l2Chain := range config.l2Chains {
+		l2Chains[l2Chain.ChainId] = anvil.New(log, &l2Chain)
+	}
+
+	return &Supersim{log, l1Chain, l2Chains}
 }
 
 func (s *Supersim) Start(ctx context.Context) error {
 	s.log.Info("starting supersim")
-	return s.anvil.Start(ctx)
+
+	if err := s.l1Chain.Start(ctx); err != nil {
+		return fmt.Errorf("l1 chain failed to start: %w", err)
+	}
+
+	for _, l2Chain := range s.l2Chains {
+		if err := l2Chain.Start(ctx); err!= nil {
+			return fmt.Errorf("l2 chain failed to start: %w", err)
+		}
+	}
+
+	return nil
 }
 
 func (s *Supersim) Stop(_ context.Context) error {
 	s.log.Info("stopping supersim")
-	return s.anvil.Stop()
-}
+
+	for _, l2Chain := range s.l2Chains {
+		if err := l2Chain.Stop(); err!= nil {
+			return fmt.Errorf("l2 chain failed to stop: %w", err)
+		}
+	}
+
+	if err := s.l1Chain.Stop(); err != nil {
+		return fmt.Errorf("l1 chain failed to stop: %w", err)
+	}
+
+	return nil}
 
 func (s *Supersim) Stopped() bool {
-	return s.anvil.Stopped()
+	return s.l1Chain.Stopped()
 }