params: add prague timestamp for mainnet (ethereum#31535)

https://eips.ethereum.org/EIPS/eip-7600#activation

Timestamp: `1746612311`
Fork id: `0xc376cf8b`

Author: lightclient

core/forkid/forkid_test.go

@@ -76,8 +76,10 @@ func TestCreation(t *testing.T) {
 				{20000000, 1681338454, ID{Hash: checksumToBytes(0xf0afd0e3), Next: 1681338455}}, // Last Gray Glacier block
 				{20000000, 1681338455, ID{Hash: checksumToBytes(0xdce96c2d), Next: 1710338135}}, // First Shanghai block
 				{30000000, 1710338134, ID{Hash: checksumToBytes(0xdce96c2d), Next: 1710338135}}, // Last Shanghai block
-				{40000000, 1710338135, ID{Hash: checksumToBytes(0x9f3d2254), Next: 0}},          // First Cancun block
-				{50000000, 2000000000, ID{Hash: checksumToBytes(0x9f3d2254), Next: 0}},          // Future Cancun block
+				{40000000, 1710338135, ID{Hash: checksumToBytes(0x9f3d2254), Next: 1746612311}}, // First Cancun block
+				{30000000, 1746022486, ID{Hash: checksumToBytes(0x9f3d2254), Next: 1746612311}}, // Last Cancun block
+				{30000000, 1746612311, ID{Hash: checksumToBytes(0xc376cf8b), Next: 0}},          // First Prague block
+				{50000000, 2000000000, ID{Hash: checksumToBytes(0xc376cf8b), Next: 0}},          // Future Prague block
 			},
 		},
 		// Sepolia test cases
@@ -137,9 +139,11 @@ func TestCreation(t *testing.T) {
 // fork ID.
 func TestValidation(t *testing.T) {
 	// Config that has not timestamp enabled
+	// TODO(lightclient): this always needs to be updated when a mainnet timestamp is set.
 	legacyConfig := *params.MainnetChainConfig
 	legacyConfig.ShanghaiTime = nil
 	legacyConfig.CancunTime = nil
+	legacyConfig.PragueTime = nil
 
 	tests := []struct {
 		config *params.ChainConfig
@@ -314,18 +318,15 @@ func TestValidation(t *testing.T) {
 
 		// Local is mainnet Prague, remote announces Shanghai + knowledge about Cancun. Remote
 		// is definitely out of sync. It may or may not need the Prague update, we don't know yet.
-		//
-		// TODO(karalabe): Enable this when Cancun **and** Prague is specced, update all the numbers
-		//{params.MainnetChainConfig, 0, 0, ID{Hash: checksumToBytes(0x3edd5b10), Next: 4370000}, nil},
+		{params.MainnetChainConfig, 0, 0, ID{Hash: checksumToBytes(0x3edd5b10), Next: 1710338135}, nil},
 
 		// Local is mainnet Shanghai, remote announces Cancun. Local is out of sync, accept.
 		{params.MainnetChainConfig, 21000000, 1700000000, ID{Hash: checksumToBytes(0x9f3d2254), Next: 0}, nil},
 
 		// Local is mainnet Shanghai, remote announces Cancun, but is not aware of Prague. Local
 		// out of sync. Local also knows about a future fork, but that is uncertain yet.
 		//
-		// TODO(karalabe): Enable this when Cancun **and** Prague is specced, update remote checksum
-		//{params.MainnetChainConfig, 21000000, 1678000000, ID{Hash: checksumToBytes(0x00000000), Next: 0}, nil},
+		{params.MainnetChainConfig, 21000000, 1678000000, ID{Hash: checksumToBytes(0xc376cf8b), Next: 0}, nil},
 
 		// Local is mainnet Cancun. remote announces Shanghai but is not aware of further forks.
 		// Remote needs software update.
@@ -342,11 +343,11 @@ func TestValidation(t *testing.T) {
 		// Local is mainnet Shanghai, remote is random Shanghai.
 		{params.MainnetChainConfig, 20000000, 1681338455, ID{Hash: checksumToBytes(0x12345678), Next: 0}, ErrLocalIncompatibleOrStale},
 
-		// Local is mainnet Cancun, far in the future. Remote announces Gopherium (non existing fork)
+		// Local is mainnet Prague, far in the future. Remote announces Gopherium (non existing fork)
 		// at some future timestamp 8888888888, for itself, but past block for local. Local is incompatible.
 		//
 		// This case detects non-upgraded nodes with majority hash power (typical Ropsten mess).
-		{params.MainnetChainConfig, 88888888, 8888888888, ID{Hash: checksumToBytes(0x9f3d2254), Next: 8888888888}, ErrLocalIncompatibleOrStale},
+		{params.MainnetChainConfig, 88888888, 8888888888, ID{Hash: checksumToBytes(0xc376cf8b), Next: 8888888888}, ErrLocalIncompatibleOrStale},
 
 		// Local is mainnet Shanghai. Remote is also in Shanghai, but announces Gopherium (non existing
 		// fork) at timestamp 1668000000, before Cancun. Local is incompatible.

params/config.go

@@ -60,10 +60,12 @@ var (
 		TerminalTotalDifficulty: MainnetTerminalTotalDifficulty, // 58_750_000_000_000_000_000_000
 		ShanghaiTime:            newUint64(1681338455),
 		CancunTime:              newUint64(1710338135),
+		PragueTime:              newUint64(1746612311),
 		DepositContractAddress:  common.HexToAddress("0x00000000219ab540356cbb839cbe05303d7705fa"),
 		Ethash:                  new(EthashConfig),
 		BlobScheduleConfig: &BlobScheduleConfig{
 			Cancun: DefaultCancunBlobConfig,
+			Prague: DefaultPragueBlobConfig,
 		},
 	}
 	// HoleskyChainConfig contains the chain parameters to run a node on the Holesky test network.