feat: startup logging

anvil/anvil.go

@@ -8,9 +8,7 @@ import (
 	"os"
 	"os/exec"
 	"sync/atomic"
-	"time"
 
-	"github.com/ethereum-optimism/supersim/utils"
 	"github.com/ethereum/go-ethereum/log"
 )
 
@@ -58,13 +56,12 @@ func (a *Anvil) Start(ctx context.Context) error {
 
 	tempFile, err := os.CreateTemp("", "genesis-*.json")
 	if err != nil {
-		return fmt.Errorf("Error creating temporary genesis file: %w", err)
+		return fmt.Errorf("error creating temporary genesis file: %w", err)
 	}
-	defer os.Remove(tempFile.Name())
 
 	_, err = tempFile.Write(a.cfg.Genesis)
 	if err != nil {
-		return fmt.Errorf("Error writing to genesis file: %w", err)
+		return fmt.Errorf("error writing to genesis file: %w", err)
 	}
 
 	// Prep args
@@ -109,11 +106,9 @@ func (a *Anvil) Start(ctx context.Context) error {
 		return fmt.Errorf("failed to start anvil: %w", err)
 	}
 
-	if _, err := utils.WaitForAnvilClientToBeReady(fmt.Sprintf("http://%s:%d", host, a.cfg.Port), 5*time.Second); err != nil {
-		return fmt.Errorf("failed to start anvil: %w", err)
-	}
-
 	go func() {
+		defer os.Remove(tempFile.Name())
+
 		if err := a.cmd.Wait(); err != nil {
 			anvilLog.Error("anvil terminated with an error", "error", err)
 		} else {
@@ -141,3 +136,11 @@ func (a *Anvil) Stop() error {
 func (a *Anvil) Stopped() bool {
 	return a.stopped.Load()
 }
+
+func (a *Anvil) Endpoint() string {
+	return fmt.Sprintf("http://%s:%d", host, a.cfg.Port)
+}
+
+func (a *Anvil) ChainId() uint64 {
+	return a.cfg.ChainId
+}

supersim.go

@@ -3,10 +3,14 @@ package supersim
 import (
 	_ "embed"
 	"fmt"
+	"strings"
+	"sync"
+	"time"
 
 	"context"
 
 	"github.com/ethereum-optimism/supersim/anvil"
+	"github.com/ethereum-optimism/supersim/utils"
 
 	"github.com/ethereum/go-ethereum/log"
 )
@@ -41,8 +45,8 @@ 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)
+	for _, l2ChainConfig := range config.l2Chains {
+		l2Chains[l2ChainConfig.ChainId] = anvil.New(log, &l2ChainConfig)
 	}
 
 	return &Supersim{log, l1Chain, l2Chains}
@@ -55,12 +59,27 @@ func (s *Supersim) Start(ctx context.Context) error {
 		return fmt.Errorf("l1 chain failed to start: %w", err)
 	}
 
+	var wg sync.WaitGroup
+	waitForAnvil := func(anvil *anvil.Anvil) {
+		defer wg.Done()
+		wg.Add(1)
+		utils.WaitForAnvilEndpointToBeReady(anvil.Endpoint(), 10*time.Second)
+	}
+
+	go waitForAnvil(s.l1Chain)
+
 	for _, l2Chain := range s.l2Chains {
 		if err := l2Chain.Start(ctx); err != nil {
 			return fmt.Errorf("l2 chain failed to start: %w", err)
 		}
+		go waitForAnvil(l2Chain)
 	}
 
+	wg.Wait()
+
+	s.log.Info("Supersim is ready")
+	s.log.Info(s.ConfigAsString())
+
 	return nil
 }
 
@@ -83,3 +102,18 @@ func (s *Supersim) Stop(_ context.Context) error {
 func (s *Supersim) Stopped() bool {
 	return s.l1Chain.Stopped()
 }
+
+func (s *Supersim) ConfigAsString() string {
+	var b strings.Builder
+
+	fmt.Fprintf(&b, "\nSupersim Config:\n")
+	fmt.Fprintf(&b, "L1:\n")
+	fmt.Fprintf(&b, "  Chain ID: %d    RPC: %s\n", s.l1Chain.ChainId(), s.l1Chain.Endpoint())
+
+	fmt.Fprintf(&b, "L2:\n")
+	for _, l2Chain := range s.l2Chains {
+		fmt.Fprintf(&b, "  Chain ID: %d    RPC: %s\n", l2Chain.ChainId(), l2Chain.Endpoint())
+	}
+
+	return b.String()
+}

supersim_test.go

@@ -10,6 +10,8 @@ import (
 
 	oplog "github.com/ethereum-optimism/optimism/op-service/log"
 	"github.com/ethereum-optimism/supersim/utils"
+
+	"github.com/ethereum/go-ethereum/rpc"
 )
 
 const (
@@ -33,7 +35,14 @@ func TestGenesisState(t *testing.T) {
 	}()
 
 	for _, l2ChainConfig := range DefaultConfig.l2Chains {
-		client, err := utils.WaitForAnvilClientToBeReady(fmt.Sprintf("http://127.0.0.1:%d", l2ChainConfig.Port), anvilClientTimeout)
+		rpcUrl := fmt.Sprintf("http://127.0.0.1:%d", l2ChainConfig.Port)
+		client, clientCreateErr := rpc.Dial(rpcUrl)
+
+		if clientCreateErr != nil {
+			t.Fatalf("Failed to create client: %v", clientCreateErr)
+		}
+
+		err := utils.WaitForAnvilClientToBeReady(client, anvilClientTimeout)
 		if err != nil {
 			t.Fatalf("Failed to connect to RPC server: %v", err)
 		}

utils/rpc.go

@@ -3,13 +3,27 @@ package utils
 import (
 	"context"
 	"fmt"
-	"net/http"
+	"strings"
 	"time"
 
 	"github.com/ethereum/go-ethereum/rpc"
 )
 
-func WaitForAnvilClientToBeReady(rpcUrl string, timeout time.Duration) (*rpc.Client, error) {
+func WaitForAnvilEndpointToBeReady(endpoint string, timeout time.Duration) error {
+	client, clientCreateErr := rpc.Dial(endpoint)
+	if clientCreateErr != nil {
+		return fmt.Errorf("failed to create client: %v", clientCreateErr)
+	}
+
+	err := WaitForAnvilClientToBeReady(client, timeout)
+	if err != nil {
+		return fmt.Errorf("failed to connect to RPC server: %v", err)
+	}
+
+	return nil
+}
+
+func WaitForAnvilClientToBeReady(client *rpc.Client, timeout time.Duration) error {
 	ctx, cancel := context.WithTimeout(context.Background(), timeout)
 	defer cancel()
 
@@ -19,23 +33,20 @@ func WaitForAnvilClientToBeReady(rpcUrl string, timeout time.Duration) (*rpc.Cli
 	for {
 		select {
 		case <-ctx.Done():
-			return nil, fmt.Errorf("timed out waiting for response from %s", rpcUrl)
+			return fmt.Errorf("timed out waiting for response from client")
 		case <-ticker.C:
-			res, err := http.Get(rpcUrl)
+			var result string
+			callErr := client.Call(&result, "web3_clientVersion")
 
-			if err != nil {
-				fmt.Printf("Error making request: %v\n", err)
+			if callErr != nil {
 				continue
 			}
-			defer res.Body.Close()
 
-			client, err := rpc.Dial(rpcUrl)
-			if err != nil {
-				fmt.Printf("Error creating rpc client: %v\n", err)
-				continue
+			if strings.HasPrefix(result, "anvil") {
+				return nil
 			}
 
-			return client, nil
+			return fmt.Errorf("unexpected client version: %s", result)
 		}
 	}
 }