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Package core

v0.5.2
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The latest major version is .

Published: Nov 25, 2019 | License: GPL3 | Module: bitbucket.org/cpchain/chain

Overview

Package core implements the cpchain consensus protocol.

Index

Examples

Constants

const (

	// BlockChainVersion ensures that an incompatible database forces a resync from scratch.
	BlockChainVersion = 3
)

Variables

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

	// 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")

	// ErrBlacklistedHash is returned if a block to import is on the blacklist.
	ErrBlacklistedHash = errors.New("blacklisted hash")

	// 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")

	ErrInvalidChain = errors.New("hash chain is invalid")
)
var (
	RemoteDBAbsenceError = errors.New("remoteDB is not set, no capability of processing private transaction")
	NoPermissionError    = errors.New("the node doesn't have the permission/responsibility to process the private tx")
)
var (
	// ErrInvalidSender is returned if the transaction contains an invalid signature.
	ErrInvalidSender = errors.New("invalid sender")

	// 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")

	// ErrUnderpriced is returned if a transaction's gas price is below the minimum
	// configured for the transaction pool.
	ErrUnderpriced = errors.New("transaction underpriced")

	// ErrReplaceUnderpriced is returned if a transaction is attempted to be replaced
	// with a different one without the required price bump.
	ErrReplaceUnderpriced = errors.New("replacement transaction underpriced")

	// 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")

	// 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")

	// ErrGasLimit is returned if a transaction's requested gas limit exceeds the
	// maximum allowance of the current block.
	ErrGasLimit = errors.New("exceeds block gas limit")

	// ErrNegativeValue is a sanity error to ensure noone is able to specify a
	// transaction with a negative value.
	ErrNegativeValue = errors.New("negative value")

	// ErrOversizedData is returned if the input data of a transaction is greater
	// than some meaningful limit a user might use. This is not a consensus error
	// making the transaction invalid, rather a DOS protection.
	ErrOversizedData = errors.New("oversized data")

	// ErrExceedQueueMapSize is returned if exceed txpool.queue map size
	ErrExceedQueueMapSize = errors.New("exceeds queue map size")
)
var BadHashes = map[common.Hash]bool{}

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

var DefaultTxPoolConfig = TxPoolConfig{
	Journal:   "transactions.rlp",
	Rejournal: time.Hour,

	PriceLimit: 1,
	PriceBump:  10,

	AccountSlots: 1024,
	GlobalSlots:  8192,
	AccountQueue: 2048,
	GlobalQueue:  8192,
	MaxTxMapSize: 2048 * 16,
	Lifetime:     3 * time.Hour,
}

DefaultTxPoolConfig contains the default configurations for the transaction pool.

var DeprecatedDefaultTxPoolConfig = TxPoolConfig{
	Journal:   "transactions.rlp",
	Rejournal: time.Hour,

	PriceLimit: 1,
	PriceBump:  10,

	AccountSlots: 16,
	GlobalSlots:  8192,
	AccountQueue: 64,
	GlobalQueue:  8192,
	MaxTxMapSize: 1024,
	Lifetime:     3 * time.Hour,
}
var (
	ErrNoGenesis = errors.New("Genesis not found in chain")
)
var MainnetGenesisHash = common.HexToHash("0xf70bf47d2629b1e9e9f900b0eb3b73e7e93c31b330d04c0029557d2ad065282a")

Genesis hashes to enforce below configs on.

func ApplyMessage

func ApplyMessage(evm *vm.EVM, msg Message, gp *GasPool) ([]byte, uint64, bool, 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 ApplyTransaction

func ApplyTransaction(config *configs.ChainConfig, bc ChainContext, author *common.Address, gp *GasPool, pubStateDb *state.StateDB,
	privateStateDb *state.StateDB, remoteDB database.RemoteDatabase, header *types.Header, tx *types.Transaction, usedGas *uint64,
	cfg vm.Config, accm *accounts.Manager) (*types.Receipt, *types.Receipt, uint64, 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(parent *types.Block) uint64

CalcGasLimit computes the gas limit of the next block after parent. This is miner strategy, not consensus protocol.

func CanTransfer

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

CanTransfer checks wether 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 *configs.ChainConfig, parent *types.Block, engine consensus.Engine, db database.Database, remoteDB database.RemoteDatabase, 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

Code:

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       = database.NewMemDatabase()
	remoteDB = database.NewIpfsDbWithAdapter(database.NewFakeIpfsAdapter())
)

type configBackup struct {
	Cep1LastBlockY1 *big.Int
	Cep1LastBlockY2 *big.Int
	Cep1LastBlockY3 *big.Int
	Cep1LastBlockY4 *big.Int
	Cep1LastBlockY5 *big.Int
}
bak := configBackup{
	Cep1LastBlockY1: configs.Cep1LastBlockY1(),
	Cep1LastBlockY2: configs.Cep1LastBlockY2(),
	Cep1LastBlockY3: configs.Cep1LastBlockY3(),
	Cep1LastBlockY4: configs.Cep1LastBlockY4(),
	Cep1LastBlockY5: configs.Cep1LastBlockY5(),
}

configs.TestOnly_SetCep1LastBlockY1(big.NewInt(1))
configs.TestOnly_SetCep1LastBlockY2(big.NewInt(2))
configs.TestOnly_SetCep1LastBlockY3(big.NewInt(3))
configs.TestOnly_SetCep1LastBlockY4(big.NewInt(4))
configs.TestOnly_SetCep1LastBlockY5(big.NewInt(5))

// recover configs.Cep1LastBlockYx
defer func() {
	configs.TestOnly_SetCep1LastBlockY1(bak.Cep1LastBlockY1)
	configs.TestOnly_SetCep1LastBlockY2(bak.Cep1LastBlockY2)
	configs.TestOnly_SetCep1LastBlockY3(bak.Cep1LastBlockY3)
	configs.TestOnly_SetCep1LastBlockY4(bak.Cep1LastBlockY4)
	configs.TestOnly_SetCep1LastBlockY5(bak.Cep1LastBlockY5)

}()

// Ensure that key1 has some funds in the genesis block.
gspec := DefaultGenesisBlock()
gspec.Alloc = GenesisAlloc{addr1: {Balance: big.NewInt(1000000)}}
// Config: &configs.ChainConfig{HomesteadBlock: new(big.Int)},
genesis := gspec.MustCommit(db)

engine := dpor.NewFaker(configs.ChainConfigInfo().Dpor, db)
// 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{}
n := 5
chain, _ := GenerateChain(gspec.Config, genesis, engine, db, remoteDB, n, func(i int, gen *BlockGen) {
	switch i {
	case 0:
		gen.SetCoinbase(addr1)
		// In block 1, addr1 sends addr2 some ether.
		tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(10000), configs.TxGas, nil, nil), signer, key1)
		gen.AddTx(tx)
	case 1:
		gen.SetCoinbase(addr2)
		// 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), configs.TxGas, nil, nil), signer, key1)
		tx2, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr2), addr3, big.NewInt(1000), configs.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)
	}
})

// Import the chain. This runs all block validation rules.
blockchain, _ := NewBlockChain(db, nil, gspec.Config, engine, vm.Config{}, remoteDB, 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:", new(big.Int).Sub(state.GetBalance(addr1), new(big.Int).Mul(big.NewInt(1265), big.NewInt(1e+16))))
fmt.Println("balance of addr2:", new(big.Int).Sub(state.GetBalance(addr2), new(big.Int).Mul(big.NewInt(951), big.NewInt(1e+16))))

sub := new(big.Int).Mul(big.NewInt(713+539+403), big.NewInt(1e+16))
balanceAddr3 := new(big.Int).Sub(state.GetBalance(addr3), sub)
fmt.Println("balance of addr3 (adjusted):", balanceAddr3)
last block: #5
balance of addr1: 989000
balance of addr2: 10000
balance of addr3 (adjusted): 1000

func GenesisBlockForTesting

func GenesisBlockForTesting(db database.Database, addr common.Address, balance *big.Int) *types.Block

GenesisBlockForTesting creates and writes a block in which addr has the given wei balance.

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 GetPrivateStateRoot

func GetPrivateStateRoot(db database.Database, blockRoot common.Hash) common.Hash

GetPrivateStateRoot gets the root(hash) for private state associated with the root of Merkle tree in public chain.

func IntrinsicGas

func IntrinsicGas(data []byte, contractCreation bool) (uint64, error)

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

func NewEVMContext

func NewEVMContext(msg Message, header *types.Header, chain ChainContext, author *common.Address) vm.Context

NewEVMContext creates a new context for use in the EVM.

func OpenGenesisBlock

func OpenGenesisBlock(db database.Database) (*configs.ChainConfig, common.Hash, error)

OpenGenesisBlock opens genesis block and returns its chain configuration and hash. Return errors when genesis block not exist or genesis block configuration not exist.

func ReadPrivateReceipt

func ReadPrivateReceipt(txHash common.Hash, db database.Database) (*types.Receipt, error)

ReadPrivateReceipt reads private receipt associated with specified transaction.

func SetReceiptsData

func SetReceiptsData(config *configs.ChainConfig, block *types.Block, receipts types.Receipts) error

SetReceiptsData computes all the non-consensus fields of the receipts

func SetupGenesisBlock

func SetupGenesisBlock(db database.Database, genesis *Genesis) (*configs.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 (must match)

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 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

func WritePrivateReceipt

func WritePrivateReceipt(receipt *types.Receipt, txHash common.Hash, db database.Database) error

WritePrivateReceipt writes private receipt associated with specified transaction.

func WritePrivateStateRoot

func WritePrivateStateRoot(db database.Database, blockRoot, root common.Hash) error

WritePrivateStateRoot writes the root(hash) for private state associated with the root of Merkle tree in public chain.

type BlockChain

type BlockChain struct {
	Quit chan struct{} // blockchain quit channel

	ErrChan chan error
	// 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 database.Database, cacheConfig *CacheConfig, chainConfig *configs.ChainConfig, engine consensus.Engine,
	vmConfig vm.Config, remoteDB database.RemoteDatabase, accm *accounts.Manager) (*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) BadBlocks

func (bc *BlockChain) BadBlocks() []*types.Block

BadBlocks returns a list of the last 'bad blocks' that the client has seen on the network

func (*BlockChain) CommitStateDB

func (bc *BlockChain) CommitStateDB()

func (*BlockChain) Config

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

Config retrieves the blockchain's chain configuration.

func (*BlockChain) CurrentBlock

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

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

func (*BlockChain) CurrentFastBlock

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

CurrentFastBlock retrieves the current fast-sync head 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) Database

func (bc *BlockChain) Database() database.Database

Database return db

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) FastSyncCommitHead

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

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

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) GetBlockHashesFromHash

func (bc *BlockChain) GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash

GetBlockHashesFromHash retrieves a number of block hashes starting at a given hash, fetching towards the genesis block.

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 eth/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) 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) GetReceiptsByHash

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

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

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) 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) 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, checkFreq int) (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.

The verify parameter can be used to fine tune whether nonce verification should be done or not. The reason behind the optional check is because some of the header retrieval mechanisms already need to verify nonces, as well as because nonces can be verified sparsely, not needing to check each.

func (*BlockChain) InsertReceiptChain

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

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

func (*BlockChain) KnownHead

func (bc *BlockChain) KnownHead() (common.Hash, uint64)

KnownHead returns hash and number of current head block (maybe not in local chain)

func (*BlockChain) PostChainEvents

func (bc *BlockChain) PostChainEvents(events []interface{}, logs []*types.Log)

PostChainEvents iterates over the events generated by a chain insertion and posts them into the event feed. TODO: Should not expose PostChainEvents. The chain events should be posted in WriteBlock.

func (*BlockChain) Processor

func (bc *BlockChain) Processor() Processor

Processor returns the current processor.

func (*BlockChain) RemoteDB

func (bc *BlockChain) RemoteDB() database.RemoteDatabase

RemoteDB returns remote database if it has, otherwise return nil.

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) Rollback

func (bc *BlockChain) Rollback(chain []common.Hash)

Rollback is designed to remove a chain of links from the database that aren't certain enough to be valid.

func (*BlockChain) SetHead

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

SetHead rewinds the local chain to a new head. In the case of headers, everything above the new head will be deleted and the new one set. In the case of blocks though, the head may be further rewound if block bodies are missing (non-archive nodes after a fast sync).

func (*BlockChain) SetKnownHead

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

SetKnownHead sets the known head block hash and number

func (*BlockChain) SetProcessor

func (bc *BlockChain) SetProcessor(processor Processor)

SetProcessor sets the processor required for making state modifications.

func (*BlockChain) SetSyncMode

func (bc *BlockChain) SetSyncMode(mode syncer.SyncMode)

SetSyncMode set syncMode

func (*BlockChain) SetTypeMux

func (bc *BlockChain) SetTypeMux(mux *event.TypeMux)

func (*BlockChain) SetValidator

func (bc *BlockChain) SetValidator(validator Validator)

SetValidator sets the validator which is used to validate incoming blocks.

func (*BlockChain) State

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

State returns a new mutable state(public) 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(public) based on a particular point in time.

func (*BlockChain) StatePriv

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

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

func (*BlockChain) StatePrivAt

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

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

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) 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) SubscribeChainLatestEvent

func (bc *BlockChain) SubscribeChainLatestEvent(ch chan<- ChainLatestEvent) event.Subscription

SubscribeChainLatestEvent registers a subscription of ChainLatestEvent.

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) SyncMode

func (bc *BlockChain) SyncMode() syncer.SyncMode

SyncMode return syncMode

func (*BlockChain) TrieNode

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

TrieNode retrieves a blob of data associated with a trie node (or code hash) either from ephemeral in-memory cache, or from persistent storage.

func (*BlockChain) ValidateBlockBody

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

ValidateBlockBody validates transactions in a block based on known states

func (*BlockChain) Validator

func (bc *BlockChain) Validator() Validator

Validator returns the current validator.

func (*BlockChain) WriteBlockWithState

func (bc *BlockChain) WriteBlockWithState(block *types.Block, pubReceipts []*types.Receipt, privReceipts []*types.Receipt,
	pubState *state.StateDB, privState *state.StateDB) (status WriteStatus, err error)

WriteBlockWithState writes the block and all associated state to the database.

func (*BlockChain) WriteBlockWithoutState

func (bc *BlockChain) WriteBlockWithoutState(block *types.Block, td *big.Int) (err error)

WriteBlockWithoutState writes only the block and its metadata to the database, but does not write any state. This is used to construct competing side forks up to the point where they exceed the canonical total difficulty.

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.

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) 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) Number

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

Number returns the block number of the block being generated.

func (*BlockGen) OffsetTime

func (b *BlockGen) OffsetTime(milliseconds 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) SetExtra

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

SetExtra sets the extra data field of the generated block.

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 *configs.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 header's transaction root. The headers are assumed to be already validated at this point.

func (*BlockValidator) ValidateState

func (v *BlockValidator) ValidateState(block, parent *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. ValidateState returns a database batch if the validation was a success otherwise nil and an error is returned.

type CacheConfig

type CacheConfig struct {
	Disabled      bool          // Whether to disable trie write caching (archive node)
	TrieNodeLimit int           // Memory limit (MB) at which to flush the current in-memory trie to disk
	TrieTimeLimit time.Duration // Time limit after which to flush the current in-memory trie to disk
}

CacheConfig contains the configuration values for the trie caching/pruning that's resident in a blockchain.

type ChainContext

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

	// GetHeader returns the hash corresponding to their hash.
	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 NewChainIndexer

func NewChainIndexer(chainDb, indexDb database.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) AddChildIndexer

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

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

func (*ChainIndexer) AddKnownSectionHead

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

AddKnownSectionHead marks a new section head as known/processed if it is newer than the already known best section head

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) 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(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(header *types.Header)

	// Commit finalizes the section metadata and stores it into the database.
	Commit() 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.
	// cf. https://github.com/ethereum/go-ethereum/pull/17826
	SubscribeChainHeadEvent(ch chan<- ChainHeadEvent) event.Subscription
}

ChainIndexerChain interface is used for connecting the indexer to a blockchain

type ChainLatestEvent

type ChainLatestEvent struct {
	Block *types.Block
}

type ChainSideEvent

type ChainSideEvent struct {
	Block *types.Block
}

type DeleteCallback

type DeleteCallback func(rawdb.DatabaseDeleter, common.Hash, uint64)

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

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) 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     *configs.ChainConfig `json:"config"     toml:"config"`
	Timestamp  uint64               `json:"timestamp"  toml:"timestamp"`
	ExtraData  []byte               `json:"extraData"  toml:"extraData"`
	GasLimit   uint64               `json:"gasLimit"   toml:"gasLimit"   gencodec:"required"`
	Difficulty *big.Int             `json:"difficulty" toml:"difficulty" gencodec:"required"`
	Coinbase   common.Address       `json:"coinbase"   toml:"coinbase"`
	Alloc      GenesisAlloc         `json:"alloc"      toml:"alloc"      gencodec:"required"`

	// These fields are used for consensus tests. Please don't use them
	// in actual genesis blocks.
	Number     uint64         `json:"number"     toml:"number"`
	GasUsed    uint64         `json:"gasUsed"    toml:"gasUsed"`
	ParentHash common.Hash    `json:"parentHash" toml:"parentHash"`
	Dpor       types.DporSnap `json:"dpor"       toml:"dpor"`
}

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 cpchain main net genesis block.

func (*Genesis) Commit

func (g *Genesis) Commit(db database.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) MarshalTOML

func (g Genesis) MarshalTOML() (interface{}, error)

MarshalTOML marshals as TOML.

func (*Genesis) MustCommit

func (g *Genesis) MustCommit(db database.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(db database.Database) *types.Block

ToBlock creates the genesis block and writes state of a genesis specification to the given database (or discards it if nil).

func (*Genesis) UnmarshalJSON

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

UnmarshalJSON unmarshals from JSON.

func (*Genesis) UnmarshalTOML

func (g *Genesis) UnmarshalTOML(unmarshal func(interface{}) error) error

UnmarshalTOML unmarshals from TOML.

type GenesisAccount

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

func (g GenesisAccount) MarshalTOML() (interface{}, error)

MarshalTOML marshals as TOML.

func (*GenesisAccount) UnmarshalJSON

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

UnmarshalJSON unmarshals from JSON.

func (*GenesisAccount) UnmarshalTOML

func (g *GenesisAccount) UnmarshalTOML(unmarshal func(interface{}) error) error

UnmarshalTOML unmarshals from TOML.

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

func NewHeaderChain

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

NewHeaderChain creates a new HeaderChain structure.

getValidator should return the parent's validator
procInterrupt points to the parent's interrupt semaphore
wg points to the parent's shutdown wait group

func (*HeaderChain) Config

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

Config retrieves the header chain's chain configuration.

func (*HeaderChain) CurrentBlock

func (hc *HeaderChain) CurrentBlock() *types.Block

CurrentBlock returns nil!

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) GetBlockHashesFromHash

func (hc *HeaderChain) GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash

GetBlockHashesFromHash retrieves a number of block hashes starting at a given hash, fetching towards the genesis block.

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) 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) HasHeader

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

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

func (*HeaderChain) InsertHeaderChain

func (hc *HeaderChain) InsertHeaderChain(chain []*types.Header, writeHeader WhCallback, start time.Time) (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.

The verify parameter can be used to fine tune whether nonce verification should be done or not. The reason behind the optional check is because some of the header retrieval mechanisms already need to verfy nonces, as well as because nonces can be verified sparsely, not needing to check each.

func (*HeaderChain) KnownHead

func (hc *HeaderChain) KnownHead() (common.Hash, uint64)

KnownHead returns hash and number of current head block (maybe not in local chain)

func (*HeaderChain) SetCurrentHeader

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

SetCurrentHeader sets the current head header of the canonical chain.

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, delFn DeleteCallback)

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

func (*HeaderChain) SetKnownHead

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

SetKnownHead sets the known head block hash and number

func (*HeaderChain) ValidateBlockBody

func (hc *HeaderChain) ValidateBlockBody(block *types.Block) error

ValidateBlockBody validates transactions in a block based on known states

func (*HeaderChain) ValidateHeaderChain

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

func (*HeaderChain) WriteHeader

func (hc *HeaderChain) WriteHeader(header *types.Header) (status WriteStatus, err error)

WriteHeader writes a header into the local chain, given that its parent is already known. If the total difficulty of the newly inserted header becomes greater than the current known TD, the canonical chain is re-routed.

Note: This method is not concurrent-safe with inserting blocks simultaneously into the chain, as side effects caused by reorganisations cannot be emulated without the real blocks. Hence, writing headers directly should only be done in two scenarios: pure-header mode of operation (light clients), or properly separated header/block phases (non-archive clients).

type InsertionDoneEvent

type InsertionDoneEvent struct{}

type InsertionStartEvent

type InsertionStartEvent struct{}

type Message

type Message interface {
	From() common.Address
	//FromFrontier() (common.Address, error)
	To() *common.Address

	GasPrice() *big.Int
	Gas() uint64
	Value() *big.Int

	Nonce() uint64
	CheckNonce() bool
	Data() []byte
}

Message represents a message sent to a contract.

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
	ForceBroadcast bool
}

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

type PendingLogsEvent

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

PendingLogsEvent is posted pre mining and notifies of pending logs.

type PendingStateEvent

type PendingStateEvent struct{}

PendingStateEvent is posted pre mining and notifies of pending state changes.

type Processor

type Processor interface {
	Process(block *types.Block, statedb *state.StateDB, statePrivDB *state.StateDB, remoteDB database.RemoteDatabase,
		cfg vm.Config) (types.Receipts, types.Receipts, []*types.Log, uint64, error)
}

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

Process takes the block to be processed and the pubStateDB upon which the initial state is based. It should return the receipts generated, amount of gas used in the process and return an error if any of the internal rules failed.

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 *configs.ChainConfig, bc *BlockChain, engine consensus.Engine, accm *accounts.Manager) *StateProcessor

NewStateProcessor initialises a new StateProcessor.

func (*StateProcessor) Process

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

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

Process returns the public receipts, private receipts(if have) 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
}

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 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 \0*32 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 == 5) Run Script section 6) 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() (ret []byte, usedGas uint64, failed bool, err error)

TransitionDb will transition the state by applying the current message and returning the result including the the used gas. It returns an error if it failed. An error indicates a consensus issue.

type TimedTransaction

type TimedTransaction struct {
	*types.Transaction
	// contains filtered or unexported fields
}

func (*TimedTransaction) Tx

func (tt *TimedTransaction) Tx() *types.Transaction

type TxPool

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

TxPool contains all currently known transactions. Transactions enter the pool when they are received from the network or submitted locally. They exit the pool when they are included in the blockchain.

The pool separates processable transactions (which can be applied to the current state) and future transactions. Transactions move between those two states over time as they are received and processed.

func NewTxPool

func NewTxPool(config TxPoolConfig, chainconfig *configs.ChainConfig, chain blockChain) *TxPool

NewTxPool creates a new transaction pool to gather, sort and filter inbound transactions from the network.

func (*TxPool) AddLocal

func (pool *TxPool) AddLocal(tx *types.Transaction) error

AddLocal enqueues a single transaction into the pool if it is valid, marking the sender as a local one in the mean time, ensuring it goes around the local pricing constraints.

func (*TxPool) AddLocals

func (pool *TxPool) AddLocals(txs []*types.Transaction) []error

AddLocals enqueues a batch of transactions into the pool if they are valid, marking the senders as a local ones in the mean time, ensuring they go around the local pricing constraints.

func (*TxPool) AddRemote

func (pool *TxPool) AddRemote(tx *types.Transaction) error

AddRemote enqueues a single transaction into the pool if it is valid. If the sender is not among the locally tracked ones, full pricing constraints will apply.

func (*TxPool) AddRemotes

func (pool *TxPool) AddRemotes(txs []*types.Transaction) []error

AddRemotes enqueues a batch of transactions into the pool if they are valid. If the senders are not among the locally tracked ones, full pricing constraints will apply.

func (*TxPool) Content

func (pool *TxPool) Content() (map[common.Address]types.Transactions, map[common.Address]types.Transactions)

Content retrieves the data content of the transaction pool, returning all the pending as well as queued transactions, grouped by account and sorted by nonce.

func (*TxPool) GasPrice

func (pool *TxPool) GasPrice() *big.Int

GasPrice returns the current gas price enforced by the transaction pool.

func (*TxPool) Get

func (pool *TxPool) Get(hash common.Hash) *types.Transaction

Get returns a transaction if it is contained in the pool and nil otherwise.

func (*TxPool) Pending

func (pool *TxPool) Pending() (map[common.Address]types.Transactions, error)

Pending retrieves all currently processable transactions, groupped by origin account and sorted by nonce. The returned transaction set is a copy and can be freely modified by calling code.

func (*TxPool) SetGasPrice

func (pool *TxPool) SetGasPrice(price *big.Int)

SetGasPrice updates the minimum price required by the transaction pool for a new transaction, and drops all transactions below this threshold.

func (*TxPool) State

func (pool *TxPool) State() *state.ManagedState

State returns the virtual managed state of the transaction pool.

func (*TxPool) Stats

func (pool *TxPool) Stats() (int, int)

Stats retrieves the current pool stats, namely the number of pending and the number of queued (non-executable) transactions.

func (*TxPool) Status

func (pool *TxPool) Status(hashes []common.Hash) []TxStatus

Status returns the status (unknown/pending/queued) of a batch of transactions identified by their hashes.

func (*TxPool) Stop

func (pool *TxPool) Stop()

Stop terminates the transaction pool.

func (*TxPool) SubscribeNewTxsEvent

func (pool *TxPool) SubscribeNewTxsEvent(ch chan<- NewTxsEvent) event.Subscription

SubscribeNewTxsEvent registers a subscription of NewTxsEvent and starts sending event to the given channel.

type TxPoolConfig

type TxPoolConfig struct {
	NoLocals  bool          // Whether local transaction handling should be disabled
	Journal   string        // Journal of local transactions to survive node restarts
	Rejournal time.Duration // Time interval to regenerate the local transaction journal

	PriceLimit uint64 // Minimum gas price to enforce for acceptance into the pool
	PriceBump  uint64 // Minimum price bump percentage to replace an already existing transaction (nonce)

	AccountSlots uint64 // Minimum number of executable transaction slots guaranteed per account
	GlobalSlots  uint64 // Maximum number of executable transaction slots for all accounts
	AccountQueue uint64 // Maximum number of non-executable transaction slots permitted per account
	GlobalQueue  uint64 // Maximum number of non-executable transaction slots for all accounts

	MaxTxMapSize  uint64 // Maximum number of pending transactions
	IsFifoTxQueue bool   // Use fifo queue for txs queue, not priced heap

	Lifetime time.Duration // Maximum amount of time non-executable transaction are queued
}

TxPoolConfig are the configuration parameters of the transaction pool.

type TxStatus

type TxStatus uint

TxStatus is the current status of a transaction as seen by the pool.

const (
	TxStatusUnknown TxStatus = iota
	TxStatusQueued
	TxStatusPending
	TxStatusIncluded
)

type Validator

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

	// ValidateState validates the given pubStateDB and optionally the receipts and
	// gas used.
	ValidateState(block, parent *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 WhCallback

type WhCallback func(*types.Header) error

WhCallback is a callback function for inserting individual headers. A callback is used for two reasons: first, in a LightChain, status should be processed and light chain events sent, while in a BlockChain this is not necessary since chain events are sent after inserting blocks. Second, the header writes should be protected by the parent chain mutex individually.

type WriteStatus

type WriteStatus byte

WriteStatus status of write

const (
	NonStatTy WriteStatus = iota
	CanonStatTy
	SideStatTy
)

Package Files

Documentation was rendered with GOOS=linux and GOARCH=amd64.

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