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>

internal/ethapi/api.go

@@ -920,7 +920,7 @@ func (diff *StateOverride) Apply(state *state.StateDB) error {
 type BlockOverrides struct {
 	Number     *hexutil.Big
 	Difficulty *hexutil.Big
-	Time       *hexutil.Big
+	Time       *hexutil.Uint64
 	GasLimit   *hexutil.Uint64
 	Coinbase   *common.Address
 	Random     *common.Hash
@@ -939,7 +939,7 @@ func (diff *BlockOverrides) Apply(blockCtx *vm.BlockContext) {
 		blockCtx.Difficulty = diff.Difficulty.ToInt()
 	}
 	if diff.Time != nil {
-		blockCtx.Time = diff.Time.ToInt()
+		blockCtx.Time = uint64(*diff.Time)
 	}
 	if diff.GasLimit != nil {
 		blockCtx.GasLimit = uint64(*diff.GasLimit)
@@ -1444,7 +1444,7 @@ func AccessList(ctx context.Context, b Backend, blockNrOrHash rpc.BlockNumberOrH
 	}
 	isPostMerge := header.Difficulty.Cmp(common.Big0) == 0
 	// Retrieve the precompiles since they don't need to be added to the access list
-	precompiles := vm.ActivePrecompiles(b.ChainConfig().Rules(header.Number, isPostMerge, new(big.Int).SetUint64(header.Time)))
+	precompiles := vm.ActivePrecompiles(b.ChainConfig().Rules(header.Number, isPostMerge, header.Time))
 
 	// Create an initial tracer
 	prevTracer := logger.NewAccessListTracer(nil, args.from(), to, precompiles)