all: make timestamp-based fork checks based on uint64 (#26474)

This PR changes the API so that uint64 is used for fork timestamps.
It's a good choice because types.Header also uses uint64 for time.

Co-authored-by: Felix Lange <fjl@twurst.com>

cmd/evm/internal/t8ntool/execution.go

@@ -138,7 +138,7 @@ func (pre *Prestate) Apply(vmConfig vm.Config, chainConfig *params.ChainConfig,
 		Transfer:    core.Transfer,
 		Coinbase:    pre.Env.Coinbase,
 		BlockNumber: new(big.Int).SetUint64(pre.Env.Number),
-		Time:        new(big.Int).SetUint64(pre.Env.Timestamp),
+		Time:        pre.Env.Timestamp,
 		Difficulty:  pre.Env.Difficulty,
 		GasLimit:    pre.Env.GasLimit,
 		GetHash:     getHash,

cmd/evm/internal/t8ntool/transaction.go

@@ -140,7 +140,7 @@ func Transaction(ctx *cli.Context) error {
 		}
 		// Check intrinsic gas
 		if gas, err := core.IntrinsicGas(tx.Data(), tx.AccessList(), tx.To() == nil,
-			chainConfig.IsHomestead(new(big.Int)), chainConfig.IsIstanbul(new(big.Int)), chainConfig.IsShanghai(new(big.Int))); err != nil {
+			chainConfig.IsHomestead(new(big.Int)), chainConfig.IsIstanbul(new(big.Int)), chainConfig.IsShanghai(0)); err != nil {
 			r.Error = err
 			results = append(results, r)
 			continue
@@ -172,7 +172,7 @@ func Transaction(ctx *cli.Context) error {
 			r.Error = errors.New("gas * maxFeePerGas exceeds 256 bits")
 		}
 		// Check whether the init code size has been exceeded.
-		if chainConfig.IsShanghai(new(big.Int)) && tx.To() == nil && len(tx.Data()) > params.MaxInitCodeSize {
+		if chainConfig.IsShanghai(0) && tx.To() == nil && len(tx.Data()) > params.MaxInitCodeSize {
 			r.Error = errors.New("max initcode size exceeded")
 		}
 		results = append(results, r)

cmd/evm/runner.go

@@ -209,7 +209,7 @@ func runCmd(ctx *cli.Context) error {
 		GasPrice:    flags.GlobalBig(ctx, PriceFlag.Name),
 		Value:       flags.GlobalBig(ctx, ValueFlag.Name),
 		Difficulty:  genesisConfig.Difficulty,
-		Time:        new(big.Int).SetUint64(genesisConfig.Timestamp),
+		Time:        genesisConfig.Timestamp,
 		Coinbase:    genesisConfig.Coinbase,
 		BlockNumber: new(big.Int).SetUint64(genesisConfig.Number),
 		EVMConfig: vm.Config{