rollup

Documentation

Index

• Variables
• func ComputeL2OutputRoot(proofElements *bindings.TypesOutputRootProof) (eth.Bytes32, error)
• func ComputeL2OutputRootV0(block eth.BlockInfo, storageRoot [32]byte) (eth.Bytes32, error)
• func EpochesShifts(l1BlockTime uint64, l2BlockTime uint64) uint64
• type Config
  • func (cfg *Config) Check() error
  • func (cfg *Config) CheckL1ChainID(ctx context.Context, client L1Client) error
  • func (cfg *Config) CheckL1GenesisBlockHash(ctx context.Context, client L1Client) error
  • func (cfg *Config) CheckL2ChainID(ctx context.Context, client L2Client) error
  • func (cfg *Config) CheckL2GenesisBlockHash(ctx context.Context, client L2Client) error
  • func (c *Config) Description(l2Chains map[string]string) string
  • func (c *Config) IsRegolith(timestamp uint64) bool
  • func (c *Config) L1Signer() types.Signer
  • func (c *Config) LogDescription(log log.Logger, l2Chains map[string]string)
  • func (cfg *Config) TargetBlockNumber(timestamp uint64) (num uint64, err error)
  • func (cfg *Config) ValidateL1Config(ctx context.Context, client L1Client) error
  • func (cfg *Config) ValidateL2Config(ctx context.Context, client L2Client) error
• type Epoch
• type Genesis
• type L1Client
• type L2Client

Variables

var (
	ErrBlockTimeZero                 = errors.New("block time cannot be 0")
	ErrMissingChannelTimeout         = errors.New("channel timeout must be set, this should cover at least a L1 block time")
	ErrInvalidSeqWindowSize          = errors.New("sequencing window size must at least be 2")
	ErrMissingGenesisL1Hash          = errors.New("genesis L1 hash cannot be empty")
	ErrMissingGenesisL2Hash          = errors.New("genesis L2 hash cannot be empty")
	ErrGenesisHashesSame             = errors.New("achievement get! rollup inception: L1 and L2 genesis cannot be the same")
	ErrMissingGenesisL2Time          = errors.New("missing L2 genesis time")
	ErrMissingBatcherAddr            = errors.New("missing genesis system config batcher address")
	ErrMissingOverhead               = errors.New("missing genesis system config overhead")
	ErrMissingScalar                 = errors.New("missing genesis system config scalar")
	ErrMissingGasLimit               = errors.New("missing genesis system config gas limit")
	ErrMissingBatchInboxAddress      = errors.New("missing batch inbox address")
	ErrMissingDepositContractAddress = errors.New("missing deposit contract address")
	ErrMissingL1ChainID              = errors.New("L1 chain ID must not be nil")
	ErrMissingL2ChainID              = errors.New("L2 chain ID must not be nil")
	ErrChainIDsSame                  = errors.New("L1 and L2 chain IDs must be different")
	ErrL1ChainIDNotPositive          = errors.New("L1 chain ID must be non-zero and positive")
	ErrL2ChainIDNotPositive          = errors.New("L2 chain ID must be non-zero and positive")
)

var NilProof = errors.New("Output root proof is nil")

Functions

func ComputeL2OutputRoot

func ComputeL2OutputRoot(proofElements *bindings.TypesOutputRootProof) (eth.Bytes32, error)

ComputeL2OutputRoot computes the L2 output root by hashing an output root proof.

func ComputeL2OutputRootV0

func ComputeL2OutputRootV0(block eth.BlockInfo, storageRoot [32]byte) (eth.Bytes32, error)

func EpochesShifts

func EpochesShifts(l1BlockTime uint64, l2BlockTime uint64) uint64

Types

type Config

type Config struct {
	// Genesis anchor point of the rollup
	Genesis Genesis `json:"genesis"`
	// Seconds per L2 block
	BlockTime uint64 `json:"block_time"`
	//Load from flags, default value 12 like Ethereum block time
	L1BlockTime uint64 `json:"l1_block_time"`
	// Sequencer batches may not be more than MaxSequencerDrift seconds after
	// the L1 timestamp of the sequencing window end.
	//
	// Note: When L1 has many 1 second consecutive blocks, and L2 grows at fixed 2 seconds,
	// the L2 time may still grow beyond this difference.
	MaxSequencerDrift uint64 `json:"max_sequencer_drift"`
	// Number of epochs (L1 blocks) per sequencing window, including the epoch L1 origin block itself
	SeqWindowSize uint64 `json:"seq_window_size"`
	// Number of L1 blocks between when a channel can be opened and when it must be closed by.
	ChannelTimeout uint64 `json:"channel_timeout"`
	// Required to verify L1 signatures
	L1ChainID *big.Int `json:"l1_chain_id"`
	// Required to identify the L2 network and create p2p signatures unique for this chain.
	L2ChainID *big.Int `json:"l2_chain_id"`

	// RegolithTime sets the activation time of the Regolith network-upgrade:
	// a pre-mainnet Bedrock change that addresses findings of the Sherlock contest related to deposit attributes.
	// "Regolith" is the loose deposited rock that sits on top of Bedrock.
	// Active if RegolithTime != nil && L2 block timestamp >= *RegolithTime, inactive otherwise.
	RegolithTime *uint64 `json:"regolith_time,omitempty"`

	// L1 address that batches are sent to.
	BatchInboxAddress common.Address `json:"batch_inbox_address"`
	// L1 Deposit Contract Address
	DepositContractAddress common.Address `json:"deposit_contract_address"`
	// L1 System Config Address
	L1SystemConfigAddress common.Address `json:"l1_system_config_address"`
}

func (*Config) Check

func (cfg *Config) Check() error

Check verifies that the given configuration makes sense

func (*Config) CheckL1ChainID

func (cfg *Config) CheckL1ChainID(ctx context.Context, client L1Client) error

CheckL1ChainID checks that the configured L1 chain ID matches the client's chain ID.

func (*Config) CheckL1GenesisBlockHash

func (cfg *Config) CheckL1GenesisBlockHash(ctx context.Context, client L1Client) error

CheckL1GenesisBlockHash checks that the configured L1 genesis block hash is valid for the given client.

func (*Config) CheckL2ChainID

func (cfg *Config) CheckL2ChainID(ctx context.Context, client L2Client) error

CheckL2ChainID checks that the configured L2 chain ID matches the client's chain ID.

func (*Config) CheckL2GenesisBlockHash

func (cfg *Config) CheckL2GenesisBlockHash(ctx context.Context, client L2Client) error

CheckL2GenesisBlockHash checks that the configured L2 genesis block hash is valid for the given client.

func (*Config) Description

func (c *Config) Description(l2Chains map[string]string) string

Description outputs a banner describing the important parts of rollup configuration in a human-readable form. Optionally provide a mapping of L2 chain IDs to network names to label the L2 chain with if not unknown. The config should be config.Check()-ed before creating a description.

func (*Config) IsRegolith

func (c *Config) IsRegolith(timestamp uint64) bool

IsRegolith returns true if the Regolith hardfork is active at or past the given timestamp.

func (*Config) L1Signer

func (c *Config) L1Signer() types.Signer

func (*Config) LogDescription

func (c *Config) LogDescription(log log.Logger, l2Chains map[string]string)

Description outputs a banner describing the important parts of rollup configuration in a log format. Optionally provide a mapping of L2 chain IDs to network names to label the L2 chain with if not unknown. The config should be config.Check()-ed before creating a description.

func (*Config) TargetBlockNumber

func (cfg *Config) TargetBlockNumber(timestamp uint64) (num uint64, err error)

func (*Config) ValidateL1Config

func (cfg *Config) ValidateL1Config(ctx context.Context, client L1Client) error

ValidateL1Config checks L1 config variables for errors.

func (*Config) ValidateL2Config

func (cfg *Config) ValidateL2Config(ctx context.Context, client L2Client) error

ValidateL2Config checks L2 config variables for errors.

type Epoch

type Epoch uint64

type Genesis

type Genesis struct {
	// The L1 block that the rollup starts *after* (no derived transactions)
	L1 eth.BlockID `json:"l1"`
	// The L2 block the rollup starts from (no transactions, pre-configured state)
	L2 eth.BlockID `json:"l2"`
	// Timestamp of L2 block
	L2Time uint64 `json:"l2_time"`
	// Initial system configuration values.
	// The L2 genesis block may not include transactions, and thus cannot encode the config values,
	// unlike later L2 blocks.
	SystemConfig eth.SystemConfig `json:"system_config"`
}

type L1Client

type L1Client interface {
	ChainID(context.Context) (*big.Int, error)
	L1BlockRefByNumber(context.Context, uint64) (eth.L1BlockRef, error)
}

type L2Client

type L2Client interface {
	ChainID(context.Context) (*big.Int, error)
	L2BlockRefByNumber(context.Context, uint64) (eth.L2BlockRef, error)
}