Adding possibility to add more prefunded accounts

Add possibility to add more prefunded accounts to the L1 generated genesis by accepting a repeated `[]string` flag `--prefunded-account` which accepts the same format (private key in hex) as the static prefunded accounts.

I debated about putting the `prefunded-account` flag on the L1 recipe directly, to scope it just to this. Maybe it would be preferable, let me know what do you think.

Author: maoueh

main.go

@@ -33,6 +33,7 @@ var platform string
 var contenderEnabled bool
 var contenderArgs []string
 var contenderTarget string
+var prefundedAccounts []string
 
 var rootCmd = &cobra.Command{
 	Use:   "playground",
@@ -185,6 +186,7 @@ func main() {
 		recipeCmd.Flags().BoolVar(&contenderEnabled, "contender", false, "spam nodes with contender")
 		recipeCmd.Flags().StringArrayVar(&contenderArgs, "contender.arg", []string{}, "add/override contender CLI flags")
 		recipeCmd.Flags().StringVar(&contenderTarget, "contender.target", "", "override the node that contender spams -- accepts names like \"el\"")
+		recipeCmd.Flags().StringArrayVar(&prefundedAccounts, "prefunded-account", []string{}, "Add a prefunded account by passing its private key in hexadecimal format")
 
 		cookCmd.AddCommand(recipeCmd)
 	}
@@ -225,6 +227,7 @@ func runIt(recipe playground.Recipe) error {
 	builder := recipe.Artifacts()
 	builder.OutputDir(outputFlag)
 	builder.GenesisDelay(genesisDelayFlag)
+	builder.PrefundedAccounts(prefundedAccounts)
 	artifacts, err := builder.Build()
 	if err != nil {
 		return err

playground/artifacts.go

@@ -65,6 +65,7 @@ type ArtifactsBuilder struct {
 	genesisDelay      uint64
 	applyLatestL2Fork *uint64
 	OpblockTime       uint64
+	prefundedAccounts []string
 }
 
 func NewArtifactsBuilder() *ArtifactsBuilder {
@@ -101,6 +102,32 @@ func (b *ArtifactsBuilder) OpBlockTime(blockTimeSeconds uint64) *ArtifactsBuilde
 	return b
 }
 
+func (b *ArtifactsBuilder) PrefundedAccounts(accounts []string) *ArtifactsBuilder {
+	b.prefundedAccounts = accounts
+	return b
+}
+
+var staticPrefundedAccounts = []string{
+	"0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80",
+	"0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d",
+	"0x5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a",
+	"0x7c852118294e51e653712a81e05800f419141751be58f605c371e15141b007a6",
+	"0x47e179ec197488593b187f80a00eb0da91f1b9d0b13f8733639f19c30a34926a",
+	"0x8b3a350cf5c34c9194ca85829a2df0ec3153be0318b5e2d3348e872092edffba",
+	"0x92db14e403b83dfe3df233f83dfa3a0d7096f21ca9b0d6d6b8d88b2b4ec1564e",
+	"0x4bbbf85ce3377467afe5d46f804f221813b2bb87f24d81f60f1fcdbf7cbf4356",
+	"0xdbda1821b80551c9d65939329250298aa3472ba22feea921c0cf5d620ea67b97",
+	"0x2a871d0798f97d79848a013d4936a73bf4cc922c825d33c1cf7073dff6d409c6",
+}
+
+func (b *ArtifactsBuilder) getPrefundedAccounts() []string {
+	if len(b.prefundedAccounts) > 0 {
+		return append(append([]string{}, staticPrefundedAccounts...), b.prefundedAccounts...)
+	}
+
+	return staticPrefundedAccounts
+}
+
 type Artifacts struct {
 	Out *output
 }
@@ -158,7 +185,7 @@ func (b *ArtifactsBuilder) Build() (*Artifacts, error) {
 	// add pre-funded accounts
 	prefundedBalance, _ := new(big.Int).SetString("10000000000000000000000", 16)
 
-	for _, privStr := range prefundedAccounts {
+	for _, privStr := range b.getPrefundedAccounts() {
 		priv, err := getPrivKey(privStr)
 		if err != nil {
 			return nil, err
@@ -283,7 +310,7 @@ func (b *ArtifactsBuilder) Build() (*Artifacts, error) {
 		// Update the allocs to include the same prefunded accounts as the L1 genesis.
 		allocs := make(map[string]interface{})
 		input["alloc"] = allocs
-		for _, privStr := range prefundedAccounts {
+		for _, privStr := range b.getPrefundedAccounts() {
 			priv, err := getPrivKey(privStr)
 			if err != nil {
 				return nil, err
@@ -678,19 +705,6 @@ func isByteSlice(t reflect.Type) bool {
 	return t.Kind() == reflect.Slice && t.Elem().Kind() == reflect.Uint8
 }
 
-var prefundedAccounts = []string{
-	"0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80",
-	"0x59c6995e998f97a5a0044966f0945389dc9e86dae88c7a8412f4603b6b78690d",
-	"0x5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a",
-	"0x7c852118294e51e653712a81e05800f419141751be58f605c371e15141b007a6",
-	"0x47e179ec197488593b187f80a00eb0da91f1b9d0b13f8733639f19c30a34926a",
-	"0x8b3a350cf5c34c9194ca85829a2df0ec3153be0318b5e2d3348e872092edffba",
-	"0x92db14e403b83dfe3df233f83dfa3a0d7096f21ca9b0d6d6b8d88b2b4ec1564e",
-	"0x4bbbf85ce3377467afe5d46f804f221813b2bb87f24d81f60f1fcdbf7cbf4356",
-	"0xdbda1821b80551c9d65939329250298aa3472ba22feea921c0cf5d620ea67b97",
-	"0x2a871d0798f97d79848a013d4936a73bf4cc922c825d33c1cf7073dff6d409c6",
-}
-
 func applyTemplate2(templateStr []byte, input interface{}) ([]byte, error) {
 	tpl, err := template.New("").Parse(string(templateStr))
 	if err != nil {