core

package
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Published: Nov 11, 2023 License: GPL-3.0 Imports: 47 Imported by: 0

Documentation

Overview

Package core implements the Ethereum consensus protocol.

Index

Examples

Constants

View Source
const (
	TriesInMemory = 128

	// BlockChainVersion ensures that an incompatible database forces a resync from scratch.
	//
	// Changelog:
	//
	// - Version 4
	//   The following incompatible database changes were added:
	//   * the `BlockNumber`, `TxHash`, `TxIndex`, `BlockHash` and `Index` fields of log are deleted
	//   * the `Bloom` field of receipt is deleted
	//   * the `BlockIndex` and `TxIndex` fields of txlookup are deleted
	// - Version 5
	//  The following incompatible database changes were added:
	//    * the `TxHash`, `GasCost`, and `ContractAddress` fields are no longer stored for a receipt
	//    * the `TxHash`, `GasCost`, and `ContractAddress` fields are computed by looking up the
	//      receipts' corresponding block
	// - Version 6
	//  The following incompatible database changes were added:
	//    * Transaction lookup information stores the corresponding block number instead of block hash
	// - Version 7
	//  The following incompatible database changes were added:
	//    * Use freezer as the ancient database to maintain all ancient data
	// - Version 8
	//  The following incompatible database changes were added:
	//    * New scheme for contract code in order to separate the codes and trie nodes
	BlockChainVersion uint64 = 8
)

Variables

View Source
var (
	// ErrKnownBlock is returned when a block to import is already known locally.
	ErrKnownBlock = errors.New("block already known")

	// ErrBannedHash is returned if a block to import is on the banned list.
	ErrBannedHash = errors.New("banned hash")

	// ErrNoGenesis is returned when there is no Genesis Block.
	ErrNoGenesis = errors.New("genesis not found in chain")
)
View Source
var (
	// ErrNonceTooLow is returned if the nonce of a transaction is lower than the
	// one present in the local chain.
	ErrNonceTooLow = errors.New("nonce too low")

	// ErrNonceTooHigh is returned if the nonce of a transaction is higher than the
	// next one expected based on the local chain.
	ErrNonceTooHigh = errors.New("nonce too high")

	// ErrNonceMax is returned if the nonce of a transaction sender account has
	// maximum allowed value and would become invalid if incremented.
	ErrNonceMax = errors.New("nonce has max value")

	// ErrGasLimitReached is returned by the gas pool if the amount of gas required
	// by a transaction is higher than what's left in the block.
	ErrGasLimitReached = errors.New("gas limit reached")

	// ErrInsufficientFundsForTransfer is returned if the transaction sender doesn't
	// have enough funds for transfer(topmost call only).
	ErrInsufficientFundsForTransfer = errors.New("insufficient funds for transfer")

	// ErrMaxInitCodeSizeExceeded is returned if creation transaction provides the init code bigger
	// than init code size limit.
	ErrMaxInitCodeSizeExceeded = errors.New("max initcode size exceeded")

	// ErrInsufficientFunds is returned if the total cost of executing a transaction
	// is higher than the balance of the user's account.
	ErrInsufficientFunds = errors.New("insufficient funds for gas * price + value")

	// ErrGasUintOverflow is returned when calculating gas usage.
	ErrGasUintOverflow = errors.New("gas uint64 overflow")

	// ErrIntrinsicGas is returned if the transaction is specified to use less gas
	// than required to start the invocation.
	ErrIntrinsicGas = errors.New("intrinsic gas too low")

	// ErrTxTypeNotSupported is returned if a transaction is not supported in the
	// current network configuration.
	ErrTxTypeNotSupported = types.ErrTxTypeNotSupported

	// ErrTipAboveFeeCap is a sanity error to ensure no one is able to specify a
	// transaction with a tip higher than the total fee cap.
	ErrTipAboveFeeCap = errors.New("max priority fee per gas higher than max fee per gas")

	// ErrTipVeryHigh is a sanity error to avoid extremely big numbers specified
	// in the tip field.
	ErrTipVeryHigh = errors.New("max priority fee per gas higher than 2^256-1")

	// ErrFeeCapVeryHigh is a sanity error to avoid extremely big numbers specified
	// in the fee cap field.
	ErrFeeCapVeryHigh = errors.New("max fee per gas higher than 2^256-1")

	// ErrFeeCapTooLow is returned if the transaction fee cap is less than the
	// base fee of the block.
	ErrFeeCapTooLow = errors.New("max fee per gas less than block base fee")

	// ErrSenderNoEOA is returned if the sender of a transaction is a contract.
	ErrSenderNoEOA = errors.New("sender not an eoa")

	// ErrBlobFeeCapTooLow is returned if the transaction fee cap is less than the
	// blob gas fee of the block.
	ErrBlobFeeCapTooLow = errors.New("max fee per blob gas less than block blob gas fee")
)

List of evm-call-message pre-checking errors. All state transition messages will be pre-checked before execution. If any invalidation detected, the corresponding error should be returned which is defined here.

- If the pre-checking happens in the miner, then the transaction won't be packed. - If the pre-checking happens in the block processing procedure, then a "BAD BLOCk" error should be emitted.

View Source
var BadHashes = map[common.Hash]bool{
	common.HexToHash("05bef30ef572270f654746da22639a7a0c97dd97a7050b9e252391996aaeb689"): true,
	common.HexToHash("7d05d08cbc596a2e5e4f13b80a743e53e09221b5323c3a61946b20873e58583f"): true,
}

BadHashes represent a set of manually tracked bad hashes (usually hard forks)

View Source
var SenderCacher = newTxSenderCacher(runtime.NumCPU())

SenderCacher is a concurrent transaction sender recoverer and cacher.

Functions

func ApplyTransaction

func ApplyTransaction(config *params.ChainConfig, bc ChainContext, author *common.Address, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *uint64, cfg vm.Config) (*types.Receipt, error)

ApplyTransaction attempts to apply a transaction to the given state database and uses the input parameters for its environment. It returns the receipt for the transaction, gas used and an error if the transaction failed, indicating the block was invalid.

func CalcGasLimit

func CalcGasLimit(parentGasLimit, desiredLimit uint64) uint64

CalcGasLimit computes the gas limit of the next block after parent. It aims to keep the baseline gas close to the provided target, and increase it towards the target if the baseline gas is lower.

func CanTransfer

func CanTransfer(db vm.StateDB, addr common.Address, amount *big.Int) bool

CanTransfer checks whether there are enough funds in the address' account to make a transfer. This does not take the necessary gas in to account to make the transfer valid.

func GenerateChain

func GenerateChain(config *params.ChainConfig, parent *types.Block, engine consensus.Engine, db bludb.Database, n int, gen func(int, *BlockGen)) ([]*types.Block, []types.Receipts)

GenerateChain creates a chain of n blocks. The first block's parent will be the provided parent. db is used to store intermediate states and should contain the parent's state trie.

The generator function is called with a new block generator for every block. Any transactions and uncles added to the generator become part of the block. If gen is nil, the blocks will be empty and their coinbase will be the zero address.

Blocks created by GenerateChain do not contain valid proof of work values. Inserting them into BlockChain requires use of FakePow or a similar non-validating proof of work implementation.

Example
var (
	key1, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
	key2, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
	key3, _ = crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
	addr1   = crypto.PubkeyToAddress(key1.PublicKey)
	addr2   = crypto.PubkeyToAddress(key2.PublicKey)
	addr3   = crypto.PubkeyToAddress(key3.PublicKey)
	db      = rawdb.NewMemoryDatabase()
	genDb   = rawdb.NewMemoryDatabase()
)

// Ensure that key1 has some funds in the genesis block.
gspec := &Genesis{
	Config: &params.ChainConfig{HomesteadBlock: new(big.Int)},
	Alloc:  GenesisAlloc{addr1: {Balance: big.NewInt(1000000)}},
}
genesis := gspec.MustCommit(genDb, trie.NewDatabase(genDb, trie.HashDefaults))

// This call generates a chain of 5 blocks. The function runs for
// each block and adds different features to gen based on the
// block index.
signer := types.HomesteadSigner{}
chain, _ := GenerateChain(gspec.Config, genesis, ethash.NewFaker(), genDb, 5, func(i int, gen *BlockGen) {
	switch i {
	case 0:
		// In block 1, addr1 sends addr2 some ether.
		tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(10000), params.TxGas, nil, nil), signer, key1)
		gen.AddTx(tx)
	case 1:
		// In block 2, addr1 sends some more ether to addr2.
		// addr2 passes it on to addr3.
		tx1, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(1000), params.TxGas, nil, nil), signer, key1)
		tx2, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr2), addr3, big.NewInt(1000), params.TxGas, nil, nil), signer, key2)
		gen.AddTx(tx1)
		gen.AddTx(tx2)
	case 2:
		// Block 3 is empty but was mined by addr3.
		gen.SetCoinbase(addr3)
		gen.SetExtra([]byte("yeehaw"))
	case 3:
		// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
		b2 := gen.PrevBlock(1).Header()
		b2.Extra = []byte("foo")
		gen.AddUncle(b2)
		b3 := gen.PrevBlock(2).Header()
		b3.Extra = []byte("foo")
		gen.AddUncle(b3)
	}
})

// Import the chain. This runs all block validation rules.
blockchain, _ := NewBlockChain(db, DefaultCacheConfigWithScheme(rawdb.HashScheme), gspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
defer blockchain.Stop()

if i, err := blockchain.InsertChain(chain); err != nil {
	fmt.Printf("insert error (block %d): %v\n", chain[i].NumberU64(), err)
	return
}

state, _ := blockchain.State()
fmt.Printf("last block: #%d\n", blockchain.CurrentBlock().Number)
fmt.Println("balance of addr1:", state.GetBalance(addr1))
fmt.Println("balance of addr2:", state.GetBalance(addr2))
fmt.Println("balance of addr3:", state.GetBalance(addr3))
Output:

last block: #5
balance of addr1: 989000
balance of addr2: 10000
balance of addr3: 19687500000000001000

func GenerateChainWithGenesis

func GenerateChainWithGenesis(genesis *Genesis, engine consensus.Engine, n int, gen func(int, *BlockGen)) (bludb.Database, []*types.Block, []types.Receipts)

GenerateChainWithGenesis is a wrapper of GenerateChain which will initialize genesis block to database first according to the provided genesis specification then generate chain on top.

func GetHashFn

func GetHashFn(ref *types.Header, chain ChainContext) func(n uint64) common.Hash

GetHashFn returns a GetHashFunc which retrieves header hashes by number

func IntrinsicGas

func IntrinsicGas(data []byte, accessList types.AccessList, isContractCreation bool, isHomestead, isEIP2028 bool, isEIP3860 bool) (uint64, error)

IntrinsicGas computes the 'intrinsic gas' for a message with the given data.

func LoadChainConfig

func LoadChainConfig(db bludb.Database, genesis *Genesis) (*params.ChainConfig, error)

LoadChainConfig loads the stored chain config if it is already present in database, otherwise, return the config in the provided genesis specification.

func NewEVMBlockContext

func NewEVMBlockContext(header *types.Header, chain ChainContext, author *common.Address) vm.BlockContext

NewEVMBlockContext creates a new context for use in the EVM.

func NewEVMTxContext

func NewEVMTxContext(msg *Message) vm.TxContext

NewEVMTxContext creates a new transaction context for a single transaction.

func ProcessBeaconBlockRoot

func ProcessBeaconBlockRoot(beaconRoot common.Hash, vmenv *vm.EVM, statedb *state.StateDB)

ProcessBeaconBlockRoot applies the EIP-4788 system call to the beacon block root contract. This method is exported to be used in tests.

func SetupGenesisBlock

func SetupGenesisBlock(db bludb.Database, triedb *trie.Database, genesis *Genesis) (*params.ChainConfig, common.Hash, error)

SetupGenesisBlock writes or updates the genesis block in db. The block that will be used is:

                     genesis == nil       genesis != nil
                  +------------------------------------------
db has no genesis |  main-net default  |  genesis
db has genesis    |  from DB           |  genesis (if compatible)

The stored chain configuration will be updated if it is compatible (i.e. does not specify a fork block below the local head block). In case of a conflict, the error is a *params.ConfigCompatError and the new, unwritten config is returned.

The returned chain configuration is never nil.

func SetupGenesisBlockWithOverride

func SetupGenesisBlockWithOverride(db bludb.Database, triedb *trie.Database, genesis *Genesis, overrides *ChainOverrides) (*params.ChainConfig, common.Hash, error)

func Transfer

func Transfer(db vm.StateDB, sender, recipient common.Address, amount *big.Int)

Transfer subtracts amount from sender and adds amount to recipient using the given Db

Types

type BlockChain

type BlockChain struct {
	// contains filtered or unexported fields
}

BlockChain represents the canonical chain given a database with a genesis block. The Blockchain manages chain imports, reverts, chain reorganisations.

Importing blocks in to the block chain happens according to the set of rules defined by the two stage Validator. Processing of blocks is done using the Processor which processes the included transaction. The validation of the state is done in the second part of the Validator. Failing results in aborting of the import.

The BlockChain also helps in returning blocks from **any** chain included in the database as well as blocks that represents the canonical chain. It's important to note that GetBlock can return any block and does not need to be included in the canonical one where as GetBlockByNumber always represents the canonical chain.

func NewBlockChain

func NewBlockChain(db bludb.Database, cacheConfig *CacheConfig, genesis *Genesis, overrides *ChainOverrides, engine consensus.Engine, vmConfig vm.Config, shouldPreserve func(header *types.Header) bool, txLookupLimit *uint64) (*BlockChain, error)

NewBlockChain returns a fully initialised block chain using information available in the database. It initialises the default Ethereum Validator and Processor.

func (*BlockChain) Config

func (bc *BlockChain) Config() *params.ChainConfig

Config retrieves the chain's fork configuration.

func (*BlockChain) ContractCodeWithPrefix

func (bc *BlockChain) ContractCodeWithPrefix(hash common.Hash) ([]byte, error)

ContractCodeWithPrefix retrieves a blob of data associated with a contract hash either from ephemeral in-memory cache, or from persistent storage.

If the code doesn't exist in the in-memory cache, check the storage with new code scheme.

func (*BlockChain) CurrentBlock

func (bc *BlockChain) CurrentBlock() *types.Header

CurrentBlock retrieves the current head block of the canonical chain. The block is retrieved from the blockchain's internal cache.

func (*BlockChain) CurrentFinalBlock

func (bc *BlockChain) CurrentFinalBlock() *types.Header

CurrentFinalBlock retrieves the current finalized block of the canonical chain. The block is retrieved from the blockchain's internal cache.

func (*BlockChain) CurrentHeader

func (bc *BlockChain) CurrentHeader() *types.Header

CurrentHeader retrieves the current head header of the canonical chain. The header is retrieved from the HeaderChain's internal cache.

func (*BlockChain) CurrentSafeBlock

func (bc *BlockChain) CurrentSafeBlock() *types.Header

CurrentSafeBlock retrieves the current safe block of the canonical chain. The block is retrieved from the blockchain's internal cache.

func (*BlockChain) CurrentSnapBlock

func (bc *BlockChain) CurrentSnapBlock() *types.Header

CurrentSnapBlock retrieves the current snap-sync head block of the canonical chain. The block is retrieved from the blockchain's internal cache.

func (*BlockChain) Engine

func (bc *BlockChain) Engine() consensus.Engine

Engine retrieves the blockchain's consensus engine.

func (*BlockChain) Export

func (bc *BlockChain) Export(w io.Writer) error

Export writes the active chain to the given writer.

func (*BlockChain) ExportN

func (bc *BlockChain) ExportN(w io.Writer, first uint64, last uint64) error

ExportN writes a subset of the active chain to the given writer.

func (*BlockChain) GasLimit

func (bc *BlockChain) GasLimit() uint64

GasLimit returns the gas limit of the current HEAD block.

func (*BlockChain) Genesis

func (bc *BlockChain) Genesis() *types.Block

Genesis retrieves the chain's genesis block.

func (*BlockChain) GetAncestor

func (bc *BlockChain) GetAncestor(hash common.Hash, number, ancestor uint64, maxNonCanonical *uint64) (common.Hash, uint64)

GetAncestor retrieves the Nth ancestor of a given block. It assumes that either the given block or a close ancestor of it is canonical. maxNonCanonical points to a downwards counter limiting the number of blocks to be individually checked before we reach the canonical chain.

Note: ancestor == 0 returns the same block, 1 returns its parent and so on.

func (*BlockChain) GetBlock

func (bc *BlockChain) GetBlock(hash common.Hash, number uint64) *types.Block

GetBlock retrieves a block from the database by hash and number, caching it if found.

func (*BlockChain) GetBlockByHash

func (bc *BlockChain) GetBlockByHash(hash common.Hash) *types.Block

GetBlockByHash retrieves a block from the database by hash, caching it if found.

func (*BlockChain) GetBlockByNumber

func (bc *BlockChain) GetBlockByNumber(number uint64) *types.Block

GetBlockByNumber retrieves a block from the database by number, caching it (associated with its hash) if found.

func (*BlockChain) GetBlocksFromHash

func (bc *BlockChain) GetBlocksFromHash(hash common.Hash, n int) (blocks []*types.Block)

GetBlocksFromHash returns the block corresponding to hash and up to n-1 ancestors. [deprecated by blu/62]

func (*BlockChain) GetBody

func (bc *BlockChain) GetBody(hash common.Hash) *types.Body

GetBody retrieves a block body (transactions and uncles) from the database by hash, caching it if found.

func (*BlockChain) GetBodyRLP

func (bc *BlockChain) GetBodyRLP(hash common.Hash) rlp.RawValue

GetBodyRLP retrieves a block body in RLP encoding from the database by hash, caching it if found.

func (*BlockChain) GetCanonicalHash

func (bc *BlockChain) GetCanonicalHash(number uint64) common.Hash

GetCanonicalHash returns the canonical hash for a given block number

func (*BlockChain) GetHeader

func (bc *BlockChain) GetHeader(hash common.Hash, number uint64) *types.Header

GetHeader retrieves a block header from the database by hash and number, caching it if found.

func (*BlockChain) GetHeaderByHash

func (bc *BlockChain) GetHeaderByHash(hash common.Hash) *types.Header

GetHeaderByHash retrieves a block header from the database by hash, caching it if found.

func (*BlockChain) GetHeaderByNumber

func (bc *BlockChain) GetHeaderByNumber(number uint64) *types.Header

GetHeaderByNumber retrieves a block header from the database by number, caching it (associated with its hash) if found.

func (*BlockChain) GetHeadersFrom

func (bc *BlockChain) GetHeadersFrom(number, count uint64) []rlp.RawValue

GetHeadersFrom returns a contiguous segment of headers, in rlp-form, going backwards from the given number.

func (*BlockChain) GetReceiptsByHash

func (bc *BlockChain) GetReceiptsByHash(hash common.Hash) types.Receipts

GetReceiptsByHash retrieves the receipts for all transactions in a given block.

func (*BlockChain) GetTd

func (bc *BlockChain) GetTd(hash common.Hash, number uint64) *big.Int

GetTd retrieves a block's total difficulty in the canonical chain from the database by hash and number, caching it if found.

func (*BlockChain) GetTransactionLookup

func (bc *BlockChain) GetTransactionLookup(hash common.Hash) *rawdb.LegacyTxLookupEntry

GetTransactionLookup retrieves the lookup associate with the given transaction hash from the cache or database.

func (*BlockChain) GetTrieFlushInterval

func (bc *BlockChain) GetTrieFlushInterval() time.Duration

GetTrieFlushInterval gets the in-memory tries flush interval

func (*BlockChain) GetUnclesInChain

func (bc *BlockChain) GetUnclesInChain(block *types.Block, length int) []*types.Header

GetUnclesInChain retrieves all the uncles from a given block backwards until a specific distance is reached.

func (*BlockChain) GetVMConfig

func (bc *BlockChain) GetVMConfig() *vm.Config

GetVMConfig returns the block chain VM config.

func (*BlockChain) HasBlock

func (bc *BlockChain) HasBlock(hash common.Hash, number uint64) bool

HasBlock checks if a block is fully present in the database or not.

func (*BlockChain) HasBlockAndState

func (bc *BlockChain) HasBlockAndState(hash common.Hash, number uint64) bool

HasBlockAndState checks if a block and associated state trie is fully present in the database or not, caching it if present.

func (*BlockChain) HasFastBlock

func (bc *BlockChain) HasFastBlock(hash common.Hash, number uint64) bool

HasFastBlock checks if a fast block is fully present in the database or not.

func (*BlockChain) HasHeader

func (bc *BlockChain) HasHeader(hash common.Hash, number uint64) bool

HasHeader checks if a block header is present in the database or not, caching it if present.

func (*BlockChain) HasState

func (bc *BlockChain) HasState(hash common.Hash) bool

HasState checks if state trie is fully present in the database or not.

func (*BlockChain) InsertBlockWithoutSetHead

func (bc *BlockChain) InsertBlockWithoutSetHead(block *types.Block) error

InsertBlockWithoutSetHead executes the block, runs the necessary verification upon it and then persist the block and the associate state into the database. The key difference between the InsertChain is it won't do the canonical chain updating. It relies on the additional SetCanonical call to finalize the entire procedure.

func (*BlockChain) InsertChain

func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error)

InsertChain attempts to insert the given batch of blocks in to the canonical chain or, otherwise, create a fork. If an error is returned it will return the index number of the failing block as well an error describing what went wrong. After insertion is done, all accumulated events will be fired.

func (*BlockChain) InsertHeaderChain

func (bc *BlockChain) InsertHeaderChain(chain []*types.Header) (int, error)

InsertHeaderChain attempts to insert the given header chain in to the local chain, possibly creating a reorg. If an error is returned, it will return the index number of the failing header as well an error describing what went wrong.

func (*BlockChain) InsertReceiptChain

func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain []types.Receipts, ancientLimit uint64) (int, error)

InsertReceiptChain attempts to complete an already existing header chain with transaction and receipt data.

func (*BlockChain) Processor

func (bc *BlockChain) Processor() Processor

Processor returns the current processor.

func (*BlockChain) Reset

func (bc *BlockChain) Reset() error

Reset purges the entire blockchain, restoring it to its genesis state.

func (*BlockChain) ResetWithGenesisBlock

func (bc *BlockChain) ResetWithGenesisBlock(genesis *types.Block) error

ResetWithGenesisBlock purges the entire blockchain, restoring it to the specified genesis state.

func (*BlockChain) SetBlockValidatorAndProcessorForTesting

func (bc *BlockChain) SetBlockValidatorAndProcessorForTesting(v Validator, p Processor)

SetBlockValidatorAndProcessorForTesting sets the current validator and processor. This method can be used to force an invalid blockchain to be verified for tests. This method is unsafe and should only be used before block import starts.

func (*BlockChain) SetCanonical

func (bc *BlockChain) SetCanonical(head *types.Block) (common.Hash, error)

SetCanonical rewinds the chain to set the new head block as the specified block. It's possible that the state of the new head is missing, and it will be recovered in this function as well.

func (*BlockChain) SetFinalized

func (bc *BlockChain) SetFinalized(header *types.Header)

SetFinalized sets the finalized block.

func (*BlockChain) SetHead

func (bc *BlockChain) SetHead(head uint64) error

SetHead rewinds the local chain to a new head. Depending on whether the node was snap synced or full synced and in which state, the method will try to delete minimal data from disk whilst retaining chain consistency.

func (*BlockChain) SetHeadWithTimestamp

func (bc *BlockChain) SetHeadWithTimestamp(timestamp uint64) error

SetHeadWithTimestamp rewinds the local chain to a new head that has at max the given timestamp. Depending on whether the node was snap synced or full synced and in which state, the method will try to delete minimal data from disk whilst retaining chain consistency.

func (*BlockChain) SetSafe

func (bc *BlockChain) SetSafe(header *types.Header)

SetSafe sets the safe block.

func (*BlockChain) SetTrieFlushInterval

func (bc *BlockChain) SetTrieFlushInterval(interval time.Duration)

SetTrieFlushInterval configures how often in-memory tries are persisted to disk. The interval is in terms of block processing time, not wall clock. It is thread-safe and can be called repeatedly without side effects.

func (*BlockChain) SetTxLookupLimit

func (bc *BlockChain) SetTxLookupLimit(limit uint64)

SetTxLookupLimit is responsible for updating the txlookup limit to the original one stored in db if the new mismatches with the old one.

func (*BlockChain) SnapSyncCommitHead

func (bc *BlockChain) SnapSyncCommitHead(hash common.Hash) error

SnapSyncCommitHead sets the current head block to the one defined by the hash irrelevant what the chain contents were prior.

func (*BlockChain) Snapshots

func (bc *BlockChain) Snapshots() *snapshot.Tree

Snapshots returns the blockchain snapshot tree.

func (*BlockChain) State

func (bc *BlockChain) State() (*state.StateDB, error)

State returns a new mutable state based on the current HEAD block.

func (*BlockChain) StateAt

func (bc *BlockChain) StateAt(root common.Hash) (*state.StateDB, error)

StateAt returns a new mutable state based on a particular point in time.

func (*BlockChain) StateCache

func (bc *BlockChain) StateCache() state.Database

StateCache returns the caching database underpinning the blockchain instance.

func (*BlockChain) Stop

func (bc *BlockChain) Stop()

Stop stops the blockchain service. If any imports are currently in progress it will abort them using the procInterrupt.

func (*BlockChain) StopInsert

func (bc *BlockChain) StopInsert()

StopInsert interrupts all insertion methods, causing them to return errInsertionInterrupted as soon as possible. Insertion is permanently disabled after calling this method.

func (*BlockChain) SubscribeBlockProcessingEvent

func (bc *BlockChain) SubscribeBlockProcessingEvent(ch chan<- bool) event.Subscription

SubscribeBlockProcessingEvent registers a subscription of bool where true means block processing has started while false means it has stopped.

func (*BlockChain) SubscribeChainEvent

func (bc *BlockChain) SubscribeChainEvent(ch chan<- ChainEvent) event.Subscription

SubscribeChainEvent registers a subscription of ChainEvent.

func (*BlockChain) SubscribeChainHeadEvent

func (bc *BlockChain) SubscribeChainHeadEvent(ch chan<- ChainHeadEvent) event.Subscription

SubscribeChainHeadEvent registers a subscription of ChainHeadEvent.

func (*BlockChain) SubscribeChainSideEvent

func (bc *BlockChain) SubscribeChainSideEvent(ch chan<- ChainSideEvent) event.Subscription

SubscribeChainSideEvent registers a subscription of ChainSideEvent.

func (*BlockChain) SubscribeLogsEvent

func (bc *BlockChain) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription

SubscribeLogsEvent registers a subscription of []*types.Log.

func (*BlockChain) SubscribeRemovedLogsEvent

func (bc *BlockChain) SubscribeRemovedLogsEvent(ch chan<- RemovedLogsEvent) event.Subscription

SubscribeRemovedLogsEvent registers a subscription of RemovedLogsEvent.

func (*BlockChain) TrieDB

func (bc *BlockChain) TrieDB() *trie.Database

TrieDB retrieves the low level trie database used for data storage.

func (*BlockChain) TxLookupLimit

func (bc *BlockChain) TxLookupLimit() uint64

TxLookupLimit retrieves the txlookup limit used by blockchain to prune stale transaction indices.

func (*BlockChain) Validator

func (bc *BlockChain) Validator() Validator

Validator returns the current validator.

func (*BlockChain) WriteBlockAndSetHead

func (bc *BlockChain) WriteBlockAndSetHead(block *types.Block, receipts []*types.Receipt, logs []*types.Log, state *state.StateDB, emitHeadEvent bool) (status WriteStatus, err error)

WriteBlockAndSetHead writes the given block and all associated state to the database, and applies the block as the new chain head.

type BlockGen

type BlockGen struct {
	// contains filtered or unexported fields
}

BlockGen creates blocks for testing. See GenerateChain for a detailed explanation.

func (*BlockGen) AddTx

func (b *BlockGen) AddTx(tx *types.Transaction)

AddTx adds a transaction to the generated block. If no coinbase has been set, the block's coinbase is set to the zero address.

AddTx panics if the transaction cannot be executed. In addition to the protocol-imposed limitations (gas limit, etc.), there are some further limitations on the content of transactions that can be added. Notably, contract code relying on the BLOCKHASH instruction will panic during execution if it attempts to access a block number outside of the range created by GenerateChain.

func (*BlockGen) AddTxWithChain

func (b *BlockGen) AddTxWithChain(bc *BlockChain, tx *types.Transaction)

AddTxWithChain adds a transaction to the generated block. If no coinbase has been set, the block's coinbase is set to the zero address.

AddTxWithChain panics if the transaction cannot be executed. In addition to the protocol-imposed limitations (gas limit, etc.), there are some further limitations on the content of transactions that can be added. If contract code relies on the BLOCKHASH instruction, the block in chain will be returned.

func (*BlockGen) AddTxWithVMConfig

func (b *BlockGen) AddTxWithVMConfig(tx *types.Transaction, config vm.Config)

AddTxWithVMConfig adds a transaction to the generated block. If no coinbase has been set, the block's coinbase is set to the zero address. The evm interpreter can be customized with the provided vm config.

func (*BlockGen) AddUncheckedReceipt

func (b *BlockGen) AddUncheckedReceipt(receipt *types.Receipt)

AddUncheckedReceipt forcefully adds a receipts to the block without a backing transaction.

AddUncheckedReceipt will cause consensus failures when used during real chain processing. This is best used in conjunction with raw block insertion.

func (*BlockGen) AddUncheckedTx

func (b *BlockGen) AddUncheckedTx(tx *types.Transaction)

AddUncheckedTx forcefully adds a transaction to the block without any validation.

AddUncheckedTx will cause consensus failures when used during real chain processing. This is best used in conjunction with raw block insertion.

func (*BlockGen) AddUncle

func (b *BlockGen) AddUncle(h *types.Header)

AddUncle adds an uncle header to the generated block.

func (*BlockGen) AddWithdrawal

func (b *BlockGen) AddWithdrawal(w *types.Withdrawal) uint64

AddWithdrawal adds a withdrawal to the generated block. It returns the withdrawal index.

func (*BlockGen) BaseFee

func (b *BlockGen) BaseFee() *big.Int

BaseFee returns the EIP-1559 base fee of the block being generated.

func (*BlockGen) Difficulty

func (b *BlockGen) Difficulty() *big.Int

Difficulty returns the currently calculated difficulty of the block.

func (*BlockGen) Gas

func (b *BlockGen) Gas() uint64

Gas returns the amount of gas left in the current block.

func (*BlockGen) GetBalance

func (b *BlockGen) GetBalance(addr common.Address) *big.Int

GetBalance returns the balance of the given address at the generated block.

func (*BlockGen) Number

func (b *BlockGen) Number() *big.Int

Number returns the block number of the block being generated.

func (*BlockGen) OffsetTime

func (b *BlockGen) OffsetTime(seconds int64)

OffsetTime modifies the time instance of a block, implicitly changing its associated difficulty. It's useful to test scenarios where forking is not tied to chain length directly.

func (*BlockGen) PrevBlock

func (b *BlockGen) PrevBlock(index int) *types.Block

PrevBlock returns a previously generated block by number. It panics if num is greater or equal to the number of the block being generated. For index -1, PrevBlock returns the parent block given to GenerateChain.

func (*BlockGen) SetCoinbase

func (b *BlockGen) SetCoinbase(addr common.Address)

SetCoinbase sets the coinbase of the generated block. It can be called at most once.

func (*BlockGen) SetDifficulty

func (b *BlockGen) SetDifficulty(diff *big.Int)

SetDifficulty sets the difficulty field of the generated block. This method is useful for Clique tests where the difficulty does not depend on time. For the ethash tests, please use OffsetTime, which implicitly recalculates the diff.

func (*BlockGen) SetExtra

func (b *BlockGen) SetExtra(data []byte)

SetExtra sets the extra data field of the generated block.

func (*BlockGen) SetNonce

func (b *BlockGen) SetNonce(nonce types.BlockNonce)

SetNonce sets the nonce field of the generated block.

func (*BlockGen) SetParentBeaconRoot

func (b *BlockGen) SetParentBeaconRoot(root common.Hash)

SetParentBeaconRoot sets the parent beacon root field of the generated block.

func (*BlockGen) SetPoS

func (b *BlockGen) SetPoS()

SetPos makes the header a PoS-header (0 difficulty)

func (*BlockGen) Signer

func (b *BlockGen) Signer() types.Signer

Signer returns a valid signer instance for the current block.

func (*BlockGen) Timestamp

func (b *BlockGen) Timestamp() uint64

Timestamp returns the timestamp of the block being generated.

func (*BlockGen) TxNonce

func (b *BlockGen) TxNonce(addr common.Address) uint64

TxNonce returns the next valid transaction nonce for the account at addr. It panics if the account does not exist.

type BlockValidator

type BlockValidator struct {
	// contains filtered or unexported fields
}

BlockValidator is responsible for validating block headers, uncles and processed state.

BlockValidator implements Validator.

func NewBlockValidator

func NewBlockValidator(config *params.ChainConfig, blockchain *BlockChain, engine consensus.Engine) *BlockValidator

NewBlockValidator returns a new block validator which is safe for re-use

func (*BlockValidator) ValidateBody

func (v *BlockValidator) ValidateBody(block *types.Block) error

ValidateBody validates the given block's uncles and verifies the block header's transaction and uncle roots. The headers are assumed to be already validated at this point.

func (*BlockValidator) ValidateState

func (v *BlockValidator) ValidateState(block *types.Block, statedb *state.StateDB, receipts types.Receipts, usedGas uint64) error

ValidateState validates the various changes that happen after a state transition, such as amount of used gas, the receipt roots and the state root itself.

type BloomIndexer

type BloomIndexer struct {
	// contains filtered or unexported fields
}

BloomIndexer implements a core.ChainIndexer, building up a rotated bloom bits index for the Ethereum header bloom filters, permitting blazing fast filtering.

func (*BloomIndexer) Commit

func (b *BloomIndexer) Commit() error

Commit implements core.ChainIndexerBackend, finalizing the bloom section and writing it out into the database.

func (*BloomIndexer) Process

func (b *BloomIndexer) Process(ctx context.Context, header *types.Header) error

Process implements core.ChainIndexerBackend, adding a new header's bloom into the index.

func (*BloomIndexer) Prune

func (b *BloomIndexer) Prune(threshold uint64) error

Prune returns an empty error since we don't support pruning here.

func (*BloomIndexer) Reset

func (b *BloomIndexer) Reset(ctx context.Context, section uint64, lastSectionHead common.Hash) error

Reset implements core.ChainIndexerBackend, starting a new bloombits index section.

type CacheConfig

type CacheConfig struct {
	TrieCleanLimit      int           // Memory allowance (MB) to use for caching trie nodes in memory
	TrieCleanNoPrefetch bool          // Whether to disable heuristic state prefetching for followup blocks
	TrieDirtyLimit      int           // Memory limit (MB) at which to start flushing dirty trie nodes to disk
	TrieDirtyDisabled   bool          // Whether to disable trie write caching and GC altobluer (archive node)
	TrieTimeLimit       time.Duration // Time limit after which to flush the current in-memory trie to disk
	SnapshotLimit       int           // Memory allowance (MB) to use for caching snapshot entries in memory
	Preimages           bool          // Whether to store preimage of trie key to the disk
	StateHistory        uint64        // Number of blocks from head whose state histories are reserved.
	StateScheme         string        // Scheme used to store ethereum states and merkle tree nodes on top

	SnapshotNoBuild bool // Whether the background generation is allowed
	SnapshotWait    bool // Wait for snapshot construction on startup. TODO(karalabe): This is a dirty hack for testing, nuke it
}

CacheConfig contains the configuration values for the trie database and state snapshot these are resident in a blockchain.

func DefaultCacheConfigWithScheme

func DefaultCacheConfigWithScheme(scheme string) *CacheConfig

DefaultCacheConfigWithScheme returns a deep copied default cache config with a provided trie node scheme.

type ChainContext

type ChainContext interface {
	// Engine retrieves the chain's consensus engine.
	Engine() consensus.Engine

	// GetHeader returns the header corresponding to the hash/number argument pair.
	GetHeader(common.Hash, uint64) *types.Header
}

ChainContext supports retrieving headers and consensus parameters from the current blockchain to be used during transaction processing.

type ChainEvent

type ChainEvent struct {
	Block *types.Block
	Hash  common.Hash
	Logs  []*types.Log
}

type ChainHeadEvent

type ChainHeadEvent struct{ Block *types.Block }

type ChainIndexer

type ChainIndexer struct {
	// contains filtered or unexported fields
}

ChainIndexer does a post-processing job for equally sized sections of the canonical chain (like BlooomBits and CHT structures). A ChainIndexer is connected to the blockchain through the event system by starting a ChainHeadEventLoop in a goroutine.

Further child ChainIndexers can be added which use the output of the parent section indexer. These child indexers receive new head notifications only after an entire section has been finished or in case of rollbacks that might affect already finished sections.

func NewBloomIndexer

func NewBloomIndexer(db bludb.Database, size, confirms uint64) *ChainIndexer

NewBloomIndexer returns a chain indexer that generates bloom bits data for the canonical chain for fast logs filtering.

func NewChainIndexer

func NewChainIndexer(chainDb bludb.Database, indexDb bludb.Database, backend ChainIndexerBackend, section, confirm uint64, throttling time.Duration, kind string) *ChainIndexer

NewChainIndexer creates a new chain indexer to do background processing on chain segments of a given size after certain number of confirmations passed. The throttling parameter might be used to prevent database thrashing.

func (*ChainIndexer) AddCheckpoint

func (c *ChainIndexer) AddCheckpoint(section uint64, shead common.Hash)

AddCheckpoint adds a checkpoint. Sections are never processed and the chain is not expected to be available before this point. The indexer assumes that the backend has sufficient information available to process subsequent sections.

Note: knownSections == 0 and storedSections == checkpointSections until syncing reaches the checkpoint

func (*ChainIndexer) AddChildIndexer

func (c *ChainIndexer) AddChildIndexer(indexer *ChainIndexer)

AddChildIndexer adds a child ChainIndexer that can use the output of this one

func (*ChainIndexer) Close

func (c *ChainIndexer) Close() error

Close tears down all goroutines belonging to the indexer and returns any error that might have occurred internally.

func (*ChainIndexer) Prune

func (c *ChainIndexer) Prune(threshold uint64) error

Prune deletes all chain data older than given threshold.

func (*ChainIndexer) SectionHead

func (c *ChainIndexer) SectionHead(section uint64) common.Hash

SectionHead retrieves the last block hash of a processed section from the index database.

func (*ChainIndexer) Sections

func (c *ChainIndexer) Sections() (uint64, uint64, common.Hash)

Sections returns the number of processed sections maintained by the indexer and also the information about the last header indexed for potential canonical verifications.

func (*ChainIndexer) Start

func (c *ChainIndexer) Start(chain ChainIndexerChain)

Start creates a goroutine to feed chain head events into the indexer for cascading background processing. Children do not need to be started, they are notified about new events by their parents.

type ChainIndexerBackend

type ChainIndexerBackend interface {
	// Reset initiates the processing of a new chain segment, potentially terminating
	// any partially completed operations (in case of a reorg).
	Reset(ctx context.Context, section uint64, prevHead common.Hash) error

	// Process crunches through the next header in the chain segment. The caller
	// will ensure a sequential order of headers.
	Process(ctx context.Context, header *types.Header) error

	// Commit finalizes the section metadata and stores it into the database.
	Commit() error

	// Prune deletes the chain index older than the given threshold.
	Prune(threshold uint64) error
}

ChainIndexerBackend defines the methods needed to process chain segments in the background and write the segment results into the database. These can be used to create filter blooms or CHTs.

type ChainIndexerChain

type ChainIndexerChain interface {
	// CurrentHeader retrieves the latest locally known header.
	CurrentHeader() *types.Header

	// SubscribeChainHeadEvent subscribes to new head header notifications.
	SubscribeChainHeadEvent(ch chan<- ChainHeadEvent) event.Subscription
}

ChainIndexerChain interface is used for connecting the indexer to a blockchain

type ChainOverrides

type ChainOverrides struct {
	OverrideCancun *uint64
	OverrideVerkle *uint64
}

ChainOverrides contains the changes to chain config.

type ChainReader

type ChainReader interface {
	// Config retrieves the header chain's chain configuration.
	Config() *params.ChainConfig

	// GetTd returns the total difficulty of a local block.
	GetTd(common.Hash, uint64) *big.Int
}

ChainReader defines a small collection of methods needed to access the local blockchain during header verification. It's implemented by both blockchain and lightchain.

type ChainSideEvent

type ChainSideEvent struct {
	Block *types.Block
}

type DeleteBlockContentCallback

type DeleteBlockContentCallback func(bludb.KeyValueWriter, common.Hash, uint64)

DeleteBlockContentCallback is a callback function that is called by SetHead before each header is deleted.

type ExecutionResult

type ExecutionResult struct {
	UsedGas    uint64 // Total used gas but include the refunded gas
	Err        error  // Any error encountered during the execution(listed in core/vm/errors.go)
	ReturnData []byte // Returned data from evm(function result or data supplied with revert opcode)
}

ExecutionResult includes all output after executing given evm message no matter the execution itself is successful or not.

func ApplyMessage

func ApplyMessage(evm *vm.EVM, msg *Message, gp *GasPool) (*ExecutionResult, error)

ApplyMessage computes the new state by applying the given message against the old state within the environment.

ApplyMessage returns the bytes returned by any EVM execution (if it took place), the gas used (which includes gas refunds) and an error if it failed. An error always indicates a core error meaning that the message would always fail for that particular state and would never be accepted within a block.

func (*ExecutionResult) Failed

func (result *ExecutionResult) Failed() bool

Failed returns the indicator whether the execution is successful or not

func (*ExecutionResult) Return

func (result *ExecutionResult) Return() []byte

Return is a helper function to help caller distinguish between revert reason and function return. Return returns the data after execution if no error occurs.

func (*ExecutionResult) Revert

func (result *ExecutionResult) Revert() []byte

Revert returns the concrete revert reason if the execution is aborted by `REVERT` opcode. Note the reason can be nil if no data supplied with revert opcode.

func (*ExecutionResult) Unwrap

func (result *ExecutionResult) Unwrap() error

Unwrap returns the internal evm error which allows us for further analysis outside.

type ForkChoice

type ForkChoice struct {
	// contains filtered or unexported fields
}

ForkChoice is the fork chooser based on the highest total difficulty of the chain(the fork choice used in the eth1) and the external fork choice (the fork choice used in the eth2). This main goal of this ForkChoice is not only for offering fork choice during the eth1/2 merge phase, but also keep the compatibility for all other proof-of-work networks.

func NewForkChoice

func NewForkChoice(chainReader ChainReader, preserve func(header *types.Header) bool) *ForkChoice

func (*ForkChoice) ReorgNeeded

func (f *ForkChoice) ReorgNeeded(current *types.Header, extern *types.Header) (bool, error)

ReorgNeeded returns whether the reorg should be applied based on the given external header and local canonical chain. In the td mode, the new head is chosen if the corresponding total difficulty is higher. In the extern mode, the trusted header is always selected as the head.

type GasPool

type GasPool uint64

GasPool tracks the amount of gas available during execution of the transactions in a block. The zero value is a pool with zero gas available.

func (*GasPool) AddGas

func (gp *GasPool) AddGas(amount uint64) *GasPool

AddGas makes gas available for execution.

func (*GasPool) Gas

func (gp *GasPool) Gas() uint64

Gas returns the amount of gas remaining in the pool.

func (*GasPool) SetGas

func (gp *GasPool) SetGas(gas uint64)

SetGas sets the amount of gas with the provided number.

func (*GasPool) String

func (gp *GasPool) String() string

func (*GasPool) SubGas

func (gp *GasPool) SubGas(amount uint64) error

SubGas deducts the given amount from the pool if enough gas is available and returns an error otherwise.

type Genesis

type Genesis struct {
	Config     *params.ChainConfig `json:"config"`
	Nonce      uint64              `json:"nonce"`
	Timestamp  uint64              `json:"timestamp"`
	ExtraData  []byte              `json:"extraData"`
	GasLimit   uint64              `json:"gasLimit"   gencodec:"required"`
	Difficulty *big.Int            `json:"difficulty" gencodec:"required"`
	Mixhash    common.Hash         `json:"mixHash"`
	Coinbase   common.Address      `json:"coinbase"`
	Alloc      GenesisAlloc        `json:"alloc"      gencodec:"required"`

	// These fields are used for consensus tests. Please don't use them
	// in actual genesis blocks.
	Number        uint64      `json:"number"`
	GasUsed       uint64      `json:"gasUsed"`
	ParentHash    common.Hash `json:"parentHash"`
	BaseFee       *big.Int    `json:"baseFeePerGas"` // EIP-1559
	ExcessBlobGas *uint64     `json:"excessBlobGas"` // EIP-4844
	BlobGasUsed   *uint64     `json:"blobGasUsed"`   // EIP-4844
}

Genesis specifies the header fields, state of a genesis block. It also defines hard fork switch-over blocks through the chain configuration.

func DefaultGenesisBlock

func DefaultGenesisBlock() *Genesis

DefaultGenesisBlock returns the Ethereum main net genesis block.

func DefaultGoerliGenesisBlock

func DefaultGoerliGenesisBlock() *Genesis

DefaultGoerliGenesisBlock returns the Görli network genesis block.

func DefaultHoleskyGenesisBlock

func DefaultHoleskyGenesisBlock() *Genesis

DefaultHoleskyGenesisBlock returns the Holesky network genesis block.

func DefaultSepoliaGenesisBlock

func DefaultSepoliaGenesisBlock() *Genesis

DefaultSepoliaGenesisBlock returns the Sepolia network genesis block.

func DeveloperGenesisBlock

func DeveloperGenesisBlock(gasLimit uint64, faucet common.Address) *Genesis

DeveloperGenesisBlock returns the 'blu --dev' genesis block.

func ReadGenesis

func ReadGenesis(db bludb.Database) (*Genesis, error)

func (*Genesis) Commit

func (g *Genesis) Commit(db bludb.Database, triedb *trie.Database) (*types.Block, error)

Commit writes the block and state of a genesis specification to the database. The block is committed as the canonical head block.

func (Genesis) MarshalJSON

func (g Genesis) MarshalJSON() ([]byte, error)

MarshalJSON marshals as JSON.

func (*Genesis) MustCommit

func (g *Genesis) MustCommit(db bludb.Database, triedb *trie.Database) *types.Block

MustCommit writes the genesis block and state to db, panicking on error. The block is committed as the canonical head block.

func (*Genesis) ToBlock

func (g *Genesis) ToBlock() *types.Block

ToBlock returns the genesis block according to genesis specification.

func (*Genesis) UnmarshalJSON

func (g *Genesis) UnmarshalJSON(input []byte) error

UnmarshalJSON unmarshals from JSON.

type GenesisAccount

type GenesisAccount struct {
	Code       []byte                      `json:"code,omitempty"`
	Storage    map[common.Hash]common.Hash `json:"storage,omitempty"`
	Balance    *big.Int                    `json:"balance" gencodec:"required"`
	Nonce      uint64                      `json:"nonce,omitempty"`
	PrivateKey []byte                      `json:"secretKey,omitempty"` // for tests
}

GenesisAccount is an account in the state of the genesis block.

func (GenesisAccount) MarshalJSON

func (g GenesisAccount) MarshalJSON() ([]byte, error)

MarshalJSON marshals as JSON.

func (*GenesisAccount) UnmarshalJSON

func (g *GenesisAccount) UnmarshalJSON(input []byte) error

UnmarshalJSON unmarshals from JSON.

type GenesisAlloc

type GenesisAlloc map[common.Address]GenesisAccount

GenesisAlloc specifies the initial state that is part of the genesis block.

func (*GenesisAlloc) UnmarshalJSON

func (ga *GenesisAlloc) UnmarshalJSON(data []byte) error

type GenesisMismatchError

type GenesisMismatchError struct {
	Stored, New common.Hash
}

GenesisMismatchError is raised when trying to overwrite an existing genesis block with an incompatible one.

func (*GenesisMismatchError) Error

func (e *GenesisMismatchError) Error() string

type HeaderChain

type HeaderChain struct {
	// contains filtered or unexported fields
}

HeaderChain implements the basic block header chain logic that is shared by core.BlockChain and light.LightChain. It is not usable in itself, only as a part of either structure.

HeaderChain is responsible for maintaining the header chain including the header query and updating.

The components maintained by headerchain includes: (1) total difficulty (2) header (3) block hash -> number mapping (4) canonical number -> hash mapping and (5) head header flag.

It is not thread safe either, the encapsulating chain structures should do the necessary mutex locking/unlocking.

func NewHeaderChain

func NewHeaderChain(chainDb bludb.Database, config *params.ChainConfig, engine consensus.Engine, procInterrupt func() bool) (*HeaderChain, error)

NewHeaderChain creates a new HeaderChain structure. ProcInterrupt points to the parent's interrupt semaphore.

func (*HeaderChain) Config

func (hc *HeaderChain) Config() *params.ChainConfig

Config retrieves the header chain's chain configuration.

func (*HeaderChain) CurrentHeader

func (hc *HeaderChain) CurrentHeader() *types.Header

CurrentHeader retrieves the current head header of the canonical chain. The header is retrieved from the HeaderChain's internal cache.

func (*HeaderChain) Engine

func (hc *HeaderChain) Engine() consensus.Engine

Engine retrieves the header chain's consensus engine.

func (*HeaderChain) GetAncestor

func (hc *HeaderChain) GetAncestor(hash common.Hash, number, ancestor uint64, maxNonCanonical *uint64) (common.Hash, uint64)

GetAncestor retrieves the Nth ancestor of a given block. It assumes that either the given block or a close ancestor of it is canonical. maxNonCanonical points to a downwards counter limiting the number of blocks to be individually checked before we reach the canonical chain.

Note: ancestor == 0 returns the same block, 1 returns its parent and so on.

func (*HeaderChain) GetBlock

func (hc *HeaderChain) GetBlock(hash common.Hash, number uint64) *types.Block

GetBlock implements consensus.ChainReader, and returns nil for every input as a header chain does not have blocks available for retrieval.

func (*HeaderChain) GetBlockNumber

func (hc *HeaderChain) GetBlockNumber(hash common.Hash) *uint64

GetBlockNumber retrieves the block number belonging to the given hash from the cache or database

func (*HeaderChain) GetCanonicalHash

func (hc *HeaderChain) GetCanonicalHash(number uint64) common.Hash

func (*HeaderChain) GetHeader

func (hc *HeaderChain) GetHeader(hash common.Hash, number uint64) *types.Header

GetHeader retrieves a block header from the database by hash and number, caching it if found.

func (*HeaderChain) GetHeaderByHash

func (hc *HeaderChain) GetHeaderByHash(hash common.Hash) *types.Header

GetHeaderByHash retrieves a block header from the database by hash, caching it if found.

func (*HeaderChain) GetHeaderByNumber

func (hc *HeaderChain) GetHeaderByNumber(number uint64) *types.Header

GetHeaderByNumber retrieves a block header from the database by number, caching it (associated with its hash) if found.

func (*HeaderChain) GetHeadersFrom

func (hc *HeaderChain) GetHeadersFrom(number, count uint64) []rlp.RawValue

GetHeadersFrom returns a contiguous segment of headers, in rlp-form, going backwards from the given number. If the 'number' is higher than the highest local header, this method will return a best-effort response, containing the headers that we do have.

func (*HeaderChain) GetTd

func (hc *HeaderChain) GetTd(hash common.Hash, number uint64) *big.Int

GetTd retrieves a block's total difficulty in the canonical chain from the database by hash and number, caching it if found.

func (*HeaderChain) HasHeader

func (hc *HeaderChain) HasHeader(hash common.Hash, number uint64) bool

HasHeader checks if a block header is present in the database or not. In theory, if header is present in the database, all relative components like td and hash->number should be present too.

func (*HeaderChain) InsertHeaderChain

func (hc *HeaderChain) InsertHeaderChain(chain []*types.Header, start time.Time, forker *ForkChoice) (WriteStatus, error)

InsertHeaderChain inserts the given headers and does the reorganisations.

The validity of the headers is NOT CHECKED by this method, i.e. they need to be validated by ValidateHeaderChain before calling InsertHeaderChain.

This insert is all-or-nothing. If this returns an error, no headers were written, otherwise they were all processed successfully.

The returned 'write status' says if the inserted headers are part of the canonical chain or a side chain.

func (*HeaderChain) Reorg

func (hc *HeaderChain) Reorg(headers []*types.Header) error

Reorg reorgs the local canonical chain into the specified chain. The reorg can be classified into two cases: (a) extend the local chain (b) switch the head to the given header.

func (*HeaderChain) SetCurrentHeader

func (hc *HeaderChain) SetCurrentHeader(head *types.Header)

SetCurrentHeader sets the in-memory head header marker of the canonical chan as the given header.

func (*HeaderChain) SetGenesis

func (hc *HeaderChain) SetGenesis(head *types.Header)

SetGenesis sets a new genesis block header for the chain

func (*HeaderChain) SetHead

func (hc *HeaderChain) SetHead(head uint64, updateFn UpdateHeadBlocksCallback, delFn DeleteBlockContentCallback)

SetHead rewinds the local chain to a new head. Everything above the new head will be deleted and the new one set.

func (*HeaderChain) SetHeadWithTimestamp

func (hc *HeaderChain) SetHeadWithTimestamp(time uint64, updateFn UpdateHeadBlocksCallback, delFn DeleteBlockContentCallback)

SetHeadWithTimestamp rewinds the local chain to a new head timestamp. Everything above the new head will be deleted and the new one set.

func (*HeaderChain) ValidateHeaderChain

func (hc *HeaderChain) ValidateHeaderChain(chain []*types.Header) (int, error)

func (*HeaderChain) WriteHeaders

func (hc *HeaderChain) WriteHeaders(headers []*types.Header) (int, error)

WriteHeaders writes a chain of headers into the local chain, given that the parents are already known. The chain head header won't be updated in this function, the additional SetCanonical is expected in order to finish the entire procedure.

type Message

type Message struct {
	To            *common.Address
	From          common.Address
	Nonce         uint64
	Value         *big.Int
	GasLimit      uint64
	GasPrice      *big.Int
	GasFeeCap     *big.Int
	GasTipCap     *big.Int
	Data          []byte
	AccessList    types.AccessList
	BlobGasFeeCap *big.Int
	BlobHashes    []common.Hash

	// When SkipAccountChecks is true, the message nonce is not checked against the
	// account nonce in state. It also disables checking that the sender is an EOA.
	// This field will be set to true for operations like RPC eth_call.
	SkipAccountChecks bool
}

A Message contains the data derived from a single transaction that is relevant to state processing.

func TransactionToMessage

func TransactionToMessage(tx *types.Transaction, s types.Signer, baseFee *big.Int) (*Message, error)

TransactionToMessage converts a transaction into a Message.

type NewMinedBlockEvent

type NewMinedBlockEvent struct{ Block *types.Block }

NewMinedBlockEvent is posted when a block has been imported.

type NewTxsEvent

type NewTxsEvent struct{ Txs []*types.Transaction }

NewTxsEvent is posted when a batch of transactions enter the transaction pool.

type Prefetcher

type Prefetcher interface {
	// Prefetch processes the state changes according to the Ethereum rules by running
	// the transaction messages using the statedb, but any changes are discarded. The
	// only goal is to pre-cache transaction signatures and state trie nodes.
	Prefetch(block *types.Block, statedb *state.StateDB, cfg vm.Config, interrupt *atomic.Bool)
}

Prefetcher is an interface for pre-caching transaction signatures and state.

type Processor

type Processor interface {
	// Process processes the state changes according to the Ethereum rules by running
	// the transaction messages using the statedb and applying any rewards to both
	// the processor (coinbase) and any included uncles.
	Process(block *types.Block, statedb *state.StateDB, cfg vm.Config) (types.Receipts, []*types.Log, uint64, error)
}

Processor is an interface for processing blocks using a given initial state.

type RemovedLogsEvent

type RemovedLogsEvent struct{ Logs []*types.Log }

RemovedLogsEvent is posted when a reorg happens

type StateProcessor

type StateProcessor struct {
	// contains filtered or unexported fields
}

StateProcessor is a basic Processor, which takes care of transitioning state from one point to another.

StateProcessor implements Processor.

func NewStateProcessor

func NewStateProcessor(config *params.ChainConfig, bc *BlockChain, engine consensus.Engine) *StateProcessor

NewStateProcessor initialises a new StateProcessor.

func (*StateProcessor) Process

func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg vm.Config) (types.Receipts, []*types.Log, uint64, error)

Process processes the state changes according to the Ethereum rules by running the transaction messages using the statedb and applying any rewards to both the processor (coinbase) and any included uncles.

Process returns the receipts and logs accumulated during the process and returns the amount of gas that was used in the process. If any of the transactions failed to execute due to insufficient gas it will return an error.

type StateTransition

type StateTransition struct {
	// contains filtered or unexported fields
}

StateTransition represents a state transition.

== The State Transitioning Model

A state transition is a change made when a transaction is applied to the current world state. The state transitioning model does all the necessary work to work out a valid new state root.

  1. Nonce handling
  2. Pre pay gas
  3. Create a new state object if the recipient is nil
  4. Value transfer

== If contract creation ==

4a. Attempt to run transaction data
4b. If valid, use result as code for the new state object

== end ==

  1. Run Script section
  2. Derive new state root

func NewStateTransition

func NewStateTransition(evm *vm.EVM, msg *Message, gp *GasPool) *StateTransition

NewStateTransition initialises and returns a new state transition object.

func (*StateTransition) TransitionDb

func (st *StateTransition) TransitionDb() (*ExecutionResult, error)

TransitionDb will transition the state by applying the current message and returning the evm execution result with following fields.

  • used gas: total gas used (including gas being refunded)
  • returndata: the returned data from evm
  • concrete execution error: various EVM errors which abort the execution, e.g. ErrOutOfGas, ErrExecutionReverted

However if any consensus issue encountered, return the error directly with nil evm execution result.

type UpdateHeadBlocksCallback

type UpdateHeadBlocksCallback func(bludb.KeyValueWriter, *types.Header) (*types.Header, bool)

UpdateHeadBlocksCallback is a callback function that is called by SetHead before head header is updated. The method will return the actual block it updated the head to (missing state) and a flag if setHead should continue rewinding till that forcefully (exceeded ancient limits)

type Validator

type Validator interface {
	// ValidateBody validates the given block's content.
	ValidateBody(block *types.Block) error

	// ValidateState validates the given statedb and optionally the receipts and
	// gas used.
	ValidateState(block *types.Block, state *state.StateDB, receipts types.Receipts, usedGas uint64) error
}

Validator is an interface which defines the standard for block validation. It is only responsible for validating block contents, as the header validation is done by the specific consensus engines.

type WriteStatus

type WriteStatus byte

WriteStatus status of write

const (
	NonStatTy WriteStatus = iota
	CanonStatTy
	SideStatTy
)

Directories

Path Synopsis
Package asm provides support for dealing with EVM assembly instructions (e.g., disassembling them).
Package asm provides support for dealing with EVM assembly instructions (e.g., disassembling them).
Package bloombits implements bloom filtering on batches of data.
Package bloombits implements bloom filtering on batches of data.
Package forkid implements EIP-2124 (https://eips.ethereum.org/EIPS/eip-2124).
Package forkid implements EIP-2124 (https://eips.ethereum.org/EIPS/eip-2124).
Package rawdb contains a collection of low level database accessors.
Package rawdb contains a collection of low level database accessors.
Package state provides a caching layer atop the Ethereum state trie.
Package state provides a caching layer atop the Ethereum state trie.
snapshot
Package snapshot implements a journalled, dynamic state dump.
Package snapshot implements a journalled, dynamic state dump.
blobpool
Package blobpool implements the EIP-4844 blob transaction pool.
Package blobpool implements the EIP-4844 blob transaction pool.
legacypool
Package legacypool implements the normal EVM execution transaction pool.
Package legacypool implements the normal EVM execution transaction pool.
Package types contains data types related to Ethereum consensus.
Package types contains data types related to Ethereum consensus.
vm
Package vm implements the Ethereum Virtual Machine.
Package vm implements the Ethereum Virtual Machine.
runtime
Package runtime provides a basic execution model for executing EVM code.
Package runtime provides a basic execution model for executing EVM code.

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