diff --git a/params/config.go b/params/config.go
index 26c5123e71..1d530a8a6b 100644
--- a/params/config.go
+++ b/params/config.go
@@ -261,16 +261,16 @@ var (
 	//
 	// This configuration is intentionally not using keyed fields to force anyone
 	// adding flags to the config to also have to set these fields.
-	AllEthashProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, new(EthashConfig), nil}
+	AllEthashProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, nil, nil, new(EthashConfig), nil}
 
 	// AllCliqueProtocolChanges contains every protocol change (EIPs) introduced
 	// and accepted by the Ethereum core developers into the Clique consensus.
 	//
 	// This configuration is intentionally not using keyed fields to force anyone
 	// adding flags to the config to also have to set these fields.
-	AllCliqueProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, nil, nil, nil, &CliqueConfig{Period: 0, Epoch: 30000}}
+	AllCliqueProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, nil, nil, nil, nil, nil, &CliqueConfig{Period: 0, Epoch: 30000}}
 
-	TestChainConfig = &ChainConfig{big.NewInt(1), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, new(EthashConfig), nil}
+	TestChainConfig = &ChainConfig{big.NewInt(1), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, nil, nil, new(EthashConfig), nil}
 	TestRules       = TestChainConfig.Rules(new(big.Int), false)
 )
 
@@ -361,6 +361,8 @@ type ChainConfig struct {
 	ArrowGlacierBlock   *big.Int `json:"arrowGlacierBlock,omitempty"`   // Eip-4345 (bomb delay) switch block (nil = no fork, 0 = already activated)
 	GrayGlacierBlock    *big.Int `json:"grayGlacierBlock,omitempty"`    // Eip-5133 (bomb delay) switch block (nil = no fork, 0 = already activated)
 	MergeNetsplitBlock  *big.Int `json:"mergeNetsplitBlock,omitempty"`  // Virtual fork after The Merge to use as a network splitter
+	ShanghaiBlock       *big.Int `json:"shanghaiBlock,omitempty"`       // Shanghai switch block (nil = no fork, 0 = already on shanghai)
+	CancunBlock         *big.Int `json:"cancunBlock,omitempty"`         // Cancun switch block (nil = no fork, 0 = already on cancun)
 
 	// TerminalTotalDifficulty is the amount of total difficulty reached by
 	// the network that triggers the consensus upgrade.
@@ -444,6 +446,12 @@ func (c *ChainConfig) String() string {
 	if c.GrayGlacierBlock != nil {
 		banner += fmt.Sprintf(" - Gray Glacier:                %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/gray-glacier.md)\n", c.GrayGlacierBlock)
 	}
+	if c.ShanghaiBlock != nil {
+		banner += fmt.Sprintf(" - Shanghai:                     %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/shanghai.md)\n", c.ShanghaiBlock)
+	}
+	if c.CancunBlock != nil {
+		banner += fmt.Sprintf(" - Cancun:                      %-8v\n", c.CancunBlock)
+	}
 	banner += "\n"
 
 	// Add a special section for the merge as it's non-obvious
@@ -539,6 +547,16 @@ func (c *ChainConfig) IsTerminalPoWBlock(parentTotalDiff *big.Int, totalDiff *bi
 	return parentTotalDiff.Cmp(c.TerminalTotalDifficulty) < 0 && totalDiff.Cmp(c.TerminalTotalDifficulty) >= 0
 }
 
+// IsShanghai returns whether num is either equal to the Shanghai fork block or greater.
+func (c *ChainConfig) IsShanghai(num *big.Int) bool {
+	return isForked(c.ShanghaiBlock, num)
+}
+
+// IsCancun returns whether num is either equal to the Cancun fork block or greater.
+func (c *ChainConfig) IsCancun(num *big.Int) bool {
+	return isForked(c.CancunBlock, num)
+}
+
 // CheckCompatible checks whether scheduled fork transitions have been imported
 // with a mismatching chain configuration.
 func (c *ChainConfig) CheckCompatible(newcfg *ChainConfig, height uint64) *ConfigCompatError {
@@ -582,6 +600,8 @@ func (c *ChainConfig) CheckConfigForkOrder() error {
 		{name: "arrowGlacierBlock", block: c.ArrowGlacierBlock, optional: true},
 		{name: "grayGlacierBlock", block: c.GrayGlacierBlock, optional: true},
 		{name: "mergeNetsplitBlock", block: c.MergeNetsplitBlock, optional: true},
+		{name: "shanghaiBlock", block: c.ShanghaiBlock, optional: true},
+		{name: "cancunBlock", block: c.CancunBlock, optional: true},
 	} {
 		if lastFork.name != "" {
 			// Next one must be higher number
@@ -660,6 +680,12 @@ func (c *ChainConfig) checkCompatible(newcfg *ChainConfig, head *big.Int) *Confi
 	if isForkIncompatible(c.MergeNetsplitBlock, newcfg.MergeNetsplitBlock, head) {
 		return newCompatError("Merge netsplit fork block", c.MergeNetsplitBlock, newcfg.MergeNetsplitBlock)
 	}
+	if isForkIncompatible(c.ShanghaiBlock, newcfg.ShanghaiBlock, head) {
+		return newCompatError("Shanghai fork block", c.ShanghaiBlock, newcfg.ShanghaiBlock)
+	}
+	if isForkIncompatible(c.CancunBlock, newcfg.CancunBlock, head) {
+		return newCompatError("Cancun fork block", c.CancunBlock, newcfg.CancunBlock)
+	}
 	return nil
 }
 
@@ -728,7 +754,7 @@ type Rules struct {
 	IsHomestead, IsEIP150, IsEIP155, IsEIP158               bool
 	IsByzantium, IsConstantinople, IsPetersburg, IsIstanbul bool
 	IsBerlin, IsLondon                                      bool
-	IsMerge                                                 bool
+	IsMerge, IsShanghai, isCancun                           bool
 }
 
 // Rules ensures c's ChainID is not nil.
@@ -750,5 +776,7 @@ func (c *ChainConfig) Rules(num *big.Int, isMerge bool) Rules {
 		IsBerlin:         c.IsBerlin(num),
 		IsLondon:         c.IsLondon(num),
 		IsMerge:          isMerge,
+		IsShanghai:       c.IsShanghai(num),
+		isCancun:         c.IsCancun(num),
 	}
 }