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cmd, core, eth, els, params: disallow setheads below genesis, tweaks

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This commit is contained in:
Péter Szilágyi 2023-01-06 15:07:38 +02:00
parent fcf3d00488
commit b56c796220
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GPG Key ID: E9AE538CEDF8293D
10 changed files with 146 additions and 156 deletions
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9
cmd/geth/config.go
View File

@ -158,14 +158,9 @@ func makeConfigNode(ctx *cli.Context) (*node.Node, gethConfig) {
// makeFullNode loads geth configuration and creates the Ethereum backend.
func makeFullNode(ctx *cli.Context) (*node.Node, ethapi.Backend) {
stack, cfg := makeConfigNode(ctx)
if ctx.IsSet(utils.OverrideTerminalTotalDifficulty.Name) {
cfg.Eth.OverrideTerminalTotalDifficulty = flags.GlobalBig(ctx, utils.OverrideTerminalTotalDifficulty.Name)
if ctx.IsSet(utils.OverrideShanghai.Name) {
cfg.Eth.OverrideShanghai = flags.GlobalBig(ctx, utils.OverrideShanghai.Name)
}
if ctx.IsSet(utils.OverrideTerminalTotalDifficultyPassed.Name) {
override := ctx.Bool(utils.OverrideTerminalTotalDifficultyPassed.Name)
cfg.Eth.OverrideTerminalTotalDifficultyPassed = &override
}
backend, eth := utils.RegisterEthService(stack, &cfg.Eth)
// Configure log filter RPC API.

3
cmd/geth/main.go
View File

@ -64,8 +64,7 @@ var (
utils.NoUSBFlag,
utils.USBFlag,
utils.SmartCardDaemonPathFlag,
utils.OverrideTerminalTotalDifficulty,
utils.OverrideTerminalTotalDifficultyPassed,
utils.OverrideShanghai,
utils.EthashCacheDirFlag,
utils.EthashCachesInMemoryFlag,
utils.EthashCachesOnDiskFlag,

11
cmd/utils/flags.go
View File

@ -271,14 +271,9 @@ var (
Value: 2048,
Category: flags.EthCategory,
}
OverrideTerminalTotalDifficulty = &flags.BigFlag{
Name: "override.terminaltotaldifficulty",
Usage: "Manually specify TerminalTotalDifficulty, overriding the bundled setting",
Category: flags.EthCategory,
}
OverrideTerminalTotalDifficultyPassed = &cli.BoolFlag{
Name: "override.terminaltotaldifficultypassed",
Usage: "Manually specify TerminalTotalDifficultyPassed, overriding the bundled setting",
OverrideShanghai = &flags.BigFlag{
Name: "override.shanghai",
Usage: "Manually specify the Shanghai fork timestamp, overriding the bundled setting",
Category: flags.EthCategory,
}
// Light server and client settings

11
core/genesis.go
View File

@ -269,8 +269,7 @@ func (e *GenesisMismatchError) Error() string {
// ChainOverrides contains the changes to chain config.
type ChainOverrides struct {
OverrideTerminalTotalDifficulty *big.Int
OverrideTerminalTotalDifficultyPassed *bool
OverrideShanghai *big.Int
}
// SetupGenesisBlock writes or updates the genesis block in db.
@ -296,15 +295,11 @@ func SetupGenesisBlockWithOverride(db ethdb.Database, triedb *trie.Database, gen
}
applyOverrides := func(config *params.ChainConfig) {
if config != nil {
if overrides != nil && overrides.OverrideTerminalTotalDifficulty != nil {
config.TerminalTotalDifficulty = overrides.OverrideTerminalTotalDifficulty
}
if overrides != nil && overrides.OverrideTerminalTotalDifficultyPassed != nil {
config.TerminalTotalDifficultyPassed = *overrides.OverrideTerminalTotalDifficultyPassed
if overrides != nil && overrides.OverrideShanghai != nil {
config.ShanghaiTime = overrides.OverrideShanghai
}
}
}
// Just commit the new block if there is no stored genesis block.
stored := rawdb.ReadCanonicalHash(db, 0)
if (stored == common.Hash{}) {

13
core/headerchain.go
View File

@ -578,6 +578,19 @@ func (hc *HeaderChain) SetHeadWithTimestamp(time uint64, updateFn UpdateHeadBloc
// setHead rewinds the local chain to a new head block or a head timestamp.
// Everything above the new head will be deleted and the new one set.
func (hc *HeaderChain) setHead(headBlock uint64, headTime uint64, updateFn UpdateHeadBlocksCallback, delFn DeleteBlockContentCallback) {
// Sanity check that there's no attempt to undo the genesis block. This is
// a fairly synthetic case where someone enables a timestamp based fork
// below the genesis timestamp. It's nice to not allow that instead of the
// entire chain getting deleted.
if headTime > 0 && hc.genesisHeader.Time > headTime {
// Note, a critical error is quite brutal, but we should really not reach
// this point. Since pre-timestamp based forks it was impossible to have
// a fork before block 0, the setHead would always work. With timestamp
// forks it becomes possible to specify below the genesis. That said, the
// only time we setHead via timestamp is with chain config changes on the
// startup, so failing hard there is ok.
log.Crit("Rejecting genesis rewind via timestamp", "target", headTime, "genesis", hc.genesisHeader.Time)
}
var (
parentHash common.Hash
batch = hc.chainDb.NewBatch()

7
eth/backend.go
View File

@ -195,11 +195,8 @@ func New(stack *node.Node, config *ethconfig.Config) (*Ethereum, error) {
)
// Override the chain config with provided settings.
var overrides core.ChainOverrides
if config.OverrideTerminalTotalDifficulty != nil {
overrides.OverrideTerminalTotalDifficulty = config.OverrideTerminalTotalDifficulty
}
if config.OverrideTerminalTotalDifficultyPassed != nil {
overrides.OverrideTerminalTotalDifficultyPassed = config.OverrideTerminalTotalDifficultyPassed
if config.OverrideShanghai != nil {
overrides.OverrideShanghai = config.OverrideShanghai
}
eth.blockchain, err = core.NewBlockChain(chainDb, cacheConfig, config.Genesis, &overrides, eth.engine, vmConfig, eth.shouldPreserve, &config.TxLookupLimit)
if err != nil {

7
eth/ethconfig/config.go
View File

@ -206,11 +206,8 @@ type Config struct {
// CheckpointOracle is the configuration for checkpoint oracle.
CheckpointOracle *params.CheckpointOracleConfig `toml:",omitempty"`
// OverrideTerminalTotalDifficulty (TODO: remove after the fork)
OverrideTerminalTotalDifficulty *big.Int `toml:",omitempty"`
// OverrideTerminalTotalDifficultyPassed (TODO: remove after the fork)
OverrideTerminalTotalDifficultyPassed *bool `toml:",omitempty"`
// OverrideShanghai (TODO: remove after the fork)
OverrideShanghai *big.Int `toml:",omitempty"`
}
// CreateConsensusEngine creates a consensus engine for the given chain configuration.

184
eth/ethconfig/gen_config.go
View File

@ -19,50 +19,49 @@ import (
// MarshalTOML marshals as TOML.
func (c Config) MarshalTOML() (interface{}, error) {
type Config struct {
Genesis *core.Genesis `toml:",omitempty"`
NetworkId uint64
SyncMode downloader.SyncMode
EthDiscoveryURLs []string
SnapDiscoveryURLs []string
NoPruning bool
NoPrefetch bool
TxLookupLimit uint64 `toml:",omitempty"`
RequiredBlocks map[uint64]common.Hash `toml:"-"`
LightServ int `toml:",omitempty"`
LightIngress int `toml:",omitempty"`
LightEgress int `toml:",omitempty"`
LightPeers int `toml:",omitempty"`
LightNoPrune bool `toml:",omitempty"`
LightNoSyncServe bool `toml:",omitempty"`
SyncFromCheckpoint bool `toml:",omitempty"`
UltraLightServers []string `toml:",omitempty"`
UltraLightFraction int `toml:",omitempty"`
UltraLightOnlyAnnounce bool `toml:",omitempty"`
SkipBcVersionCheck bool `toml:"-"`
DatabaseHandles int `toml:"-"`
DatabaseCache int
DatabaseFreezer string
TrieCleanCache int
TrieCleanCacheJournal string `toml:",omitempty"`
TrieCleanCacheRejournal time.Duration `toml:",omitempty"`
TrieDirtyCache int
TrieTimeout time.Duration
SnapshotCache int
Preimages bool
FilterLogCacheSize int
Miner miner.Config
Ethash ethash.Config
TxPool txpool.Config
GPO gasprice.Config
EnablePreimageRecording bool
DocRoot string `toml:"-"`
RPCGasCap uint64
RPCEVMTimeout time.Duration
RPCTxFeeCap float64
Checkpoint *params.TrustedCheckpoint `toml:",omitempty"`
CheckpointOracle *params.CheckpointOracleConfig `toml:",omitempty"`
OverrideTerminalTotalDifficulty *big.Int `toml:",omitempty"`
OverrideTerminalTotalDifficultyPassed *bool `toml:",omitempty"`
Genesis *core.Genesis `toml:",omitempty"`
NetworkId uint64
SyncMode downloader.SyncMode
EthDiscoveryURLs []string
SnapDiscoveryURLs []string
NoPruning bool
NoPrefetch bool
TxLookupLimit uint64 `toml:",omitempty"`
RequiredBlocks map[uint64]common.Hash `toml:"-"`
LightServ int `toml:",omitempty"`
LightIngress int `toml:",omitempty"`
LightEgress int `toml:",omitempty"`
LightPeers int `toml:",omitempty"`
LightNoPrune bool `toml:",omitempty"`
LightNoSyncServe bool `toml:",omitempty"`
SyncFromCheckpoint bool `toml:",omitempty"`
UltraLightServers []string `toml:",omitempty"`
UltraLightFraction int `toml:",omitempty"`
UltraLightOnlyAnnounce bool `toml:",omitempty"`
SkipBcVersionCheck bool `toml:"-"`
DatabaseHandles int `toml:"-"`
DatabaseCache int
DatabaseFreezer string
TrieCleanCache int
TrieCleanCacheJournal string `toml:",omitempty"`
TrieCleanCacheRejournal time.Duration `toml:",omitempty"`
TrieDirtyCache int
TrieTimeout time.Duration
SnapshotCache int
Preimages bool
FilterLogCacheSize int
Miner miner.Config
Ethash ethash.Config
TxPool txpool.Config
GPO gasprice.Config
EnablePreimageRecording bool
DocRoot string `toml:"-"`
RPCGasCap uint64
RPCEVMTimeout time.Duration
RPCTxFeeCap float64
Checkpoint *params.TrustedCheckpoint `toml:",omitempty"`
CheckpointOracle *params.CheckpointOracleConfig `toml:",omitempty"`
OverrideShanghai *big.Int `toml:",omitempty"`
}
var enc Config
enc.Genesis = c.Genesis
@ -107,58 +106,56 @@ func (c Config) MarshalTOML() (interface{}, error) {
enc.RPCTxFeeCap = c.RPCTxFeeCap
enc.Checkpoint = c.Checkpoint
enc.CheckpointOracle = c.CheckpointOracle
enc.OverrideTerminalTotalDifficulty = c.OverrideTerminalTotalDifficulty
enc.OverrideTerminalTotalDifficultyPassed = c.OverrideTerminalTotalDifficultyPassed
enc.OverrideShanghai = c.OverrideShanghai
return &enc, nil
}
// UnmarshalTOML unmarshals from TOML.
func (c *Config) UnmarshalTOML(unmarshal func(interface{}) error) error {
type Config struct {
Genesis *core.Genesis `toml:",omitempty"`
NetworkId *uint64
SyncMode *downloader.SyncMode
EthDiscoveryURLs []string
SnapDiscoveryURLs []string
NoPruning *bool
NoPrefetch *bool
TxLookupLimit *uint64 `toml:",omitempty"`
RequiredBlocks map[uint64]common.Hash `toml:"-"`
LightServ *int `toml:",omitempty"`
LightIngress *int `toml:",omitempty"`
LightEgress *int `toml:",omitempty"`
LightPeers *int `toml:",omitempty"`
LightNoPrune *bool `toml:",omitempty"`
LightNoSyncServe *bool `toml:",omitempty"`
SyncFromCheckpoint *bool `toml:",omitempty"`
UltraLightServers []string `toml:",omitempty"`
UltraLightFraction *int `toml:",omitempty"`
UltraLightOnlyAnnounce *bool `toml:",omitempty"`
SkipBcVersionCheck *bool `toml:"-"`
DatabaseHandles *int `toml:"-"`
DatabaseCache *int
DatabaseFreezer *string
TrieCleanCache *int
TrieCleanCacheJournal *string `toml:",omitempty"`
TrieCleanCacheRejournal *time.Duration `toml:",omitempty"`
TrieDirtyCache *int
TrieTimeout *time.Duration
SnapshotCache *int
Preimages *bool
FilterLogCacheSize *int
Miner *miner.Config
Ethash *ethash.Config
TxPool *txpool.Config
GPO *gasprice.Config
EnablePreimageRecording *bool
DocRoot *string `toml:"-"`
RPCGasCap *uint64
RPCEVMTimeout *time.Duration
RPCTxFeeCap *float64
Checkpoint *params.TrustedCheckpoint `toml:",omitempty"`
CheckpointOracle *params.CheckpointOracleConfig `toml:",omitempty"`
OverrideTerminalTotalDifficulty *big.Int `toml:",omitempty"`
OverrideTerminalTotalDifficultyPassed *bool `toml:",omitempty"`
Genesis *core.Genesis `toml:",omitempty"`
NetworkId *uint64
SyncMode *downloader.SyncMode
EthDiscoveryURLs []string
SnapDiscoveryURLs []string
NoPruning *bool
NoPrefetch *bool
TxLookupLimit *uint64 `toml:",omitempty"`
RequiredBlocks map[uint64]common.Hash `toml:"-"`
LightServ *int `toml:",omitempty"`
LightIngress *int `toml:",omitempty"`
LightEgress *int `toml:",omitempty"`
LightPeers *int `toml:",omitempty"`
LightNoPrune *bool `toml:",omitempty"`
LightNoSyncServe *bool `toml:",omitempty"`
SyncFromCheckpoint *bool `toml:",omitempty"`
UltraLightServers []string `toml:",omitempty"`
UltraLightFraction *int `toml:",omitempty"`
UltraLightOnlyAnnounce *bool `toml:",omitempty"`
SkipBcVersionCheck *bool `toml:"-"`
DatabaseHandles *int `toml:"-"`
DatabaseCache *int
DatabaseFreezer *string
TrieCleanCache *int
TrieCleanCacheJournal *string `toml:",omitempty"`
TrieCleanCacheRejournal *time.Duration `toml:",omitempty"`
TrieDirtyCache *int
TrieTimeout *time.Duration
SnapshotCache *int
Preimages *bool
FilterLogCacheSize *int
Miner *miner.Config
Ethash *ethash.Config
TxPool *txpool.Config
GPO *gasprice.Config
EnablePreimageRecording *bool
DocRoot *string `toml:"-"`
RPCGasCap *uint64
RPCEVMTimeout *time.Duration
RPCTxFeeCap *float64
Checkpoint *params.TrustedCheckpoint `toml:",omitempty"`
CheckpointOracle *params.CheckpointOracleConfig `toml:",omitempty"`
OverrideShanghai *big.Int `toml:",omitempty"`
}
var dec Config
if err := unmarshal(&dec); err != nil {
@ -290,11 +287,8 @@ func (c *Config) UnmarshalTOML(unmarshal func(interface{}) error) error {
if dec.CheckpointOracle != nil {
c.CheckpointOracle = dec.CheckpointOracle
}
if dec.OverrideTerminalTotalDifficulty != nil {
c.OverrideTerminalTotalDifficulty = dec.OverrideTerminalTotalDifficulty
}
if dec.OverrideTerminalTotalDifficultyPassed != nil {
c.OverrideTerminalTotalDifficultyPassed = dec.OverrideTerminalTotalDifficultyPassed
if dec.OverrideShanghai != nil {
c.OverrideShanghai = dec.OverrideShanghai
}
return nil
}

7
les/client.go
View File

@ -94,11 +94,8 @@ func New(stack *node.Node, config *ethconfig.Config) (*LightEthereum, error) {
return nil, err
}
var overrides core.ChainOverrides
if config.OverrideTerminalTotalDifficulty != nil {
overrides.OverrideTerminalTotalDifficulty = config.OverrideTerminalTotalDifficulty
}
if config.OverrideTerminalTotalDifficultyPassed != nil {
overrides.OverrideTerminalTotalDifficultyPassed = config.OverrideTerminalTotalDifficultyPassed
if config.OverrideShanghai != nil {
overrides.OverrideShanghai = config.OverrideShanghai
}
chainConfig, genesisHash, genesisErr := core.SetupGenesisBlockWithOverride(chainDb, trie.NewDatabase(chainDb), config.Genesis, &overrides)
if _, isCompat := genesisErr.(*params.ConfigCompatError); genesisErr != nil && !isCompat {

50
params/config.go
View File

@ -445,45 +445,53 @@ func (c *ChainConfig) Description() string {
// Create a list of forks with a short description of them. Forks that only
// makes sense for mainnet should be optional at printing to avoid bloating
// the output for testnets and private networks.
banner += "Pre-Merge hard forks:\n"
banner += fmt.Sprintf(" - Homestead: %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/homestead.md)\n", c.HomesteadBlock)
banner += "Pre-Merge hard forks (block based):\n"
banner += fmt.Sprintf(" - Homestead: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/homestead.md)\n", c.HomesteadBlock)
if c.DAOForkBlock != nil {
banner += fmt.Sprintf(" - DAO Fork: %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/dao-fork.md)\n", c.DAOForkBlock)
banner += fmt.Sprintf(" - DAO Fork: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/dao-fork.md)\n", c.DAOForkBlock)
}
banner += fmt.Sprintf(" - Tangerine Whistle (EIP 150): %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/tangerine-whistle.md)\n", c.EIP150Block)
banner += fmt.Sprintf(" - Spurious Dragon/1 (EIP 155): %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/spurious-dragon.md)\n", c.EIP155Block)
banner += fmt.Sprintf(" - Spurious Dragon/2 (EIP 158): %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/spurious-dragon.md)\n", c.EIP155Block)
banner += fmt.Sprintf(" - Byzantium: %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/byzantium.md)\n", c.ByzantiumBlock)
banner += fmt.Sprintf(" - Constantinople: %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/constantinople.md)\n", c.ConstantinopleBlock)
banner += fmt.Sprintf(" - Petersburg: %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/petersburg.md)\n", c.PetersburgBlock)
banner += fmt.Sprintf(" - Istanbul: %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/istanbul.md)\n", c.IstanbulBlock)
banner += fmt.Sprintf(" - Tangerine Whistle (EIP 150): #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/tangerine-whistle.md)\n", c.EIP150Block)
banner += fmt.Sprintf(" - Spurious Dragon/1 (EIP 155): #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/spurious-dragon.md)\n", c.EIP155Block)
banner += fmt.Sprintf(" - Spurious Dragon/2 (EIP 158): #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/spurious-dragon.md)\n", c.EIP155Block)
banner += fmt.Sprintf(" - Byzantium: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/byzantium.md)\n", c.ByzantiumBlock)
banner += fmt.Sprintf(" - Constantinople: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/constantinople.md)\n", c.ConstantinopleBlock)
banner += fmt.Sprintf(" - Petersburg: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/petersburg.md)\n", c.PetersburgBlock)
banner += fmt.Sprintf(" - Istanbul: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/istanbul.md)\n", c.IstanbulBlock)
if c.MuirGlacierBlock != nil {
banner += fmt.Sprintf(" - Muir Glacier: %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/muir-glacier.md)\n", c.MuirGlacierBlock)
banner += fmt.Sprintf(" - Muir Glacier: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/muir-glacier.md)\n", c.MuirGlacierBlock)
}
banner += fmt.Sprintf(" - Berlin: %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/berlin.md)\n", c.BerlinBlock)
banner += fmt.Sprintf(" - London: %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/london.md)\n", c.LondonBlock)
banner += fmt.Sprintf(" - Berlin: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/berlin.md)\n", c.BerlinBlock)
banner += fmt.Sprintf(" - London: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/london.md)\n", c.LondonBlock)
if c.ArrowGlacierBlock != nil {
banner += fmt.Sprintf(" - Arrow Glacier: %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/arrow-glacier.md)\n", c.ArrowGlacierBlock)
banner += fmt.Sprintf(" - Arrow Glacier: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/arrow-glacier.md)\n", c.ArrowGlacierBlock)
}
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)
}
banner += fmt.Sprintf(" - Shanghai: %-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/shanghai.md)\n", c.ShanghaiTime)
if c.CancunBlock != nil {
banner += fmt.Sprintf(" - Cancun: %-8v\n", c.CancunBlock)
banner += fmt.Sprintf(" - Gray Glacier: #%-8v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/gray-glacier.md)\n", c.GrayGlacierBlock)
}
banner += "\n"
// Add a special section for the merge as it's non-obvious
if c.TerminalTotalDifficulty == nil {
banner += "The Merge is not yet available for this network!\n"
banner += " - Hard-fork specification: https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/paris.md"
banner += " - Hard-fork specification: https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/paris.md\n"
} else {
banner += "Merge configured:\n"
banner += " - Hard-fork specification: https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/paris.md\n"
banner += fmt.Sprintf(" - Network known to be merged: %v\n", c.TerminalTotalDifficultyPassed)
banner += fmt.Sprintf(" - Total terminal difficulty: %v\n", c.TerminalTotalDifficulty)
banner += fmt.Sprintf(" - Merge netsplit block: %-8v", c.MergeNetsplitBlock)
if c.MergeNetsplitBlock != nil {
banner += fmt.Sprintf(" - Merge netsplit block: #%-8v\n", c.MergeNetsplitBlock)
}
}
banner += "\n"
// Create a list of forks post-merge
banner += "Post-Merge hard forks (timestamp based):\n"
if c.ShanghaiTime != nil {
banner += fmt.Sprintf(" - Shanghai: @%-10v (https://github.com/ethereum/execution-specs/blob/master/network-upgrades/mainnet-upgrades/shanghai.md)\n", c.ShanghaiTime)
}
if c.CancunBlock != nil {
banner += fmt.Sprintf(" - Cancun: @%-10v\n", c.CancunBlock)
}
return banner
}