fix(sim): make testutil/network genesis state deterministic (#18203)

testutil/network/network.go

@@ -113,6 +113,7 @@ type Config struct {
 	AccountRetriever client.AccountRetriever
 	AppConstructor   AppConstructor             // the ABCI application constructor
 	GenesisState     map[string]json.RawMessage // custom genesis state to provide
+	GenesisTime      time.Time                  // the genesis time
 	TimeoutCommit    time.Duration              // the consensus commitment timeout
 	ChainID          string                     // the network chain-id
 	NumValidators    int                        // the total number of validators to create and bond
@@ -477,7 +478,12 @@ func New(l Logger, baseDir string, cfg Config) (*Network, error) {
 		cmtCfg.P2P.AddrBookStrict = false
 		cmtCfg.P2P.AllowDuplicateIP = true
 
-		nodeID, pubKey, err := genutil.InitializeNodeValidatorFiles(cmtCfg)
+		var mnemonic string
+		if i < len(cfg.Mnemonics) {
+			mnemonic = cfg.Mnemonics[i]
+		}
+
+		nodeID, pubKey, err := genutil.InitializeNodeValidatorFilesFromMnemonic(cmtCfg, mnemonic)
 		if err != nil {
 			return nil, err
 		}
@@ -496,11 +502,6 @@ func New(l Logger, baseDir string, cfg Config) (*Network, error) {
 			return nil, err
 		}
 
-		var mnemonic string
-		if i < len(cfg.Mnemonics) {
-			mnemonic = cfg.Mnemonics[i]
-		}
-
 		addr, secret, err := testutil.GenerateSaveCoinKey(kb, nodeDirName, mnemonic, true, algo)
 		if err != nil {
 			return nil, err

testutil/network/util.go

@@ -122,7 +122,10 @@ func startInProcess(cfg Config, val *Validator) error {
 }
 
 func collectGenFiles(cfg Config, vals []*Validator, outputDir string) error {
-	genTime := cmttime.Now()
+	genTime := cfg.GenesisTime
+	if genTime.IsZero() {
+		genTime = cmttime.Now()
+	}
 
 	for i := 0; i < cfg.NumValidators; i++ {
 		cmtCfg := vals[i].Ctx.Config