core: update genesis block to store timestamp in ms

pkg/core/helper_test.go

@@ -60,7 +60,7 @@ func newBlock(cfg config.ProtocolConfiguration, index uint32, prev util.Uint256,
 		Base: block.Base{
 			Version:       0,
 			PrevHash:      prev,
-			Timestamp:     uint64(time.Now().UTC().Unix()) + uint64(index),
+			Timestamp:     uint64(time.Now().UTC().Unix())*1000 + uint64(index),
 			Index:         index,
 			NextConsensus: witness.ScriptHash(),
 			Script:        witness,

pkg/core/util.go

@@ -46,7 +46,7 @@ func createGenesisBlock(cfg config.ProtocolConfiguration) (*block.Block, error)
 	base := block.Base{
 		Version:       0,
 		PrevHash:      util.Uint256{},
-		Timestamp:     uint64(time.Date(2016, 7, 15, 15, 8, 21, 0, time.UTC).Unix()),
+		Timestamp:     uint64(time.Date(2016, 7, 15, 15, 8, 21, 0, time.UTC).Unix()) * 1000, // Milliseconds.
 		Index:         0,
 		NextConsensus: nextConsensus,
 		Script: transaction.Witness{

pkg/core/util_test.go

@@ -20,7 +20,7 @@ func TestGenesisBlockMainNet(t *testing.T) {
 	// have been changed. Consequently, hash of the genesis block has been changed.
 	// Update expected genesis block hash for better times.
 	// Old hash is "d42561e3d30e15be6400b6df2f328e02d2bf6354c41dce433bc57687c82144bf"
-	expect := "d2e6d56c734f24c294a74785023af23f20347d97ef92e7bff1b337e37acbf2dd"
+	expect := "30b7e37836146ef63ffdc28411c6c22153b69d8fb10b1d5b96ea662cfb19d2e8"
 	assert.Equal(t, expect, block.Hash().StringLE())
 }