core

package
v0.90.0-pre Latest Latest
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 Go to latest Published: Apr 16, 2020 License: MIT Imports: 35 Imported by: 4

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Index

Constants

View Source 
const (
	// MaxContractDescriptionLen is the maximum length for contract description.
	MaxContractDescriptionLen = 65536
	// MaxContractScriptSize is the maximum script size for a contract.
	MaxContractScriptSize = 1024 * 1024
	// MaxContractParametersNum is the maximum number of parameters for a contract.
	MaxContractParametersNum = 252
	// MaxContractStringLen is the maximum length for contract metadata strings.
	MaxContractStringLen = 252
	// MaxAssetNameLen is the maximum length of asset name.
	MaxAssetNameLen = 1024
	// MaxAssetPrecision is the maximum precision of asset.
	MaxAssetPrecision = 8
	// BlocksPerYear is a multiplier for asset renewal.
	BlocksPerYear = 2000000
	// DefaultAssetLifetime is the default lifetime of an asset (which differs
	// from assets created by register tx).
	DefaultAssetLifetime = 1 + BlocksPerYear
)
View Source 
const (
	// MaxStorageKeyLen is the maximum length of a key for storage items.
	MaxStorageKeyLen = 1024
)

Variables

View Source 
var (
	// ErrAlreadyExists is returned when trying to add some already existing
	// transaction into the pool (not specifying whether it exists in the
	// chain or mempool).
	ErrAlreadyExists = errors.New("already exists")
	// ErrOOM is returned when adding transaction to the memory pool because
	// it reached its full capacity.
	ErrOOM = errors.New("no space left in the memory pool")
	// ErrPolicy is returned on attempt to add transaction that doesn't
	// comply with node's configured policy into the mempool.
	ErrPolicy = errors.New("not allowed by policy")
	// ErrInvalidBlockIndex is returned when trying to add block with index
	// other than expected height of the blockchain.
	ErrInvalidBlockIndex error = errors.New("invalid block index")
)

Functions

func GoverningTokenID 

func GoverningTokenID() util.Uint256

GoverningTokenID returns the governing token (NEO) hash.

func ScriptFromWitness 

func ScriptFromWitness(hash util.Uint160, witness *transaction.Witness) ([]byte, error)

ScriptFromWitness returns verification script for provided witness. If hash is not equal to the witness script hash, error is returned.

func SpawnVM added in v0.90.0 

func SpawnVM(ic *interop.Context) *vm.VM

SpawnVM returns a VM with script getter and interop functions set up for current blockchain.

func UtilityTokenID 

func UtilityTokenID() util.Uint256

UtilityTokenID returns the utility token (GAS) hash.

Types

type Blockchain 

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

Blockchain represents the blockchain.

func NewBlockchain 

func NewBlockchain(s storage.Store, cfg config.ProtocolConfiguration, log *zap.Logger) (*Blockchain, error)

NewBlockchain returns a new blockchain object the will use the given Store as its underlying storage.

func (*Blockchain) AddBlock 

func (bc *Blockchain) AddBlock(block *block.Block) error

AddBlock accepts successive block for the Blockchain, verifies it and stores internally. Eventually it will be persisted to the backing storage.

func (*Blockchain) AddHeaders 

func (bc *Blockchain) AddHeaders(headers ...*block.Header) error

AddHeaders processes the given headers and add them to the HeaderHashList. It expects headers to be sorted by index.

func (*Blockchain) ApplyPolicyToTxSet 

func (bc *Blockchain) ApplyPolicyToTxSet(txes []mempool.TxWithFee) []mempool.TxWithFee

ApplyPolicyToTxSet applies configured policies to given transaction set. It expects slice to be ordered by fee and returns a subslice of it.

func (*Blockchain) BlockHeight 

func (bc *Blockchain) BlockHeight() uint32

BlockHeight returns the height/index of the highest block.

func (*Blockchain) CalculateClaimable 

func (bc *Blockchain) CalculateClaimable(value util.Fixed8, startHeight, endHeight uint32) (util.Fixed8, util.Fixed8, error)

CalculateClaimable calculates the amount of GAS which can be claimed for a transaction with value. First return value is GAS generated between startHeight and endHeight. Second return value is GAS returned from accumulated SystemFees between startHeight and endHeight.

func (*Blockchain) Close 

func (bc *Blockchain) Close()

Close stops Blockchain's internal loop, syncs changes to persistent storage and closes it. The Blockchain is no longer functional after the call to Close.

func (*Blockchain) CurrentBlockHash 

func (bc *Blockchain) CurrentBlockHash() (hash util.Uint256)

CurrentBlockHash returns the highest processed block hash.

func (*Blockchain) CurrentHeaderHash 

func (bc *Blockchain) CurrentHeaderHash() (hash util.Uint256)

CurrentHeaderHash returns the hash of the latest known header.

func (*Blockchain) FeePerByte 

func (bc *Blockchain) FeePerByte(t *transaction.Transaction) util.Fixed8

FeePerByte returns network fee divided by the size of the transaction.

func (*Blockchain) GetAccountState 

func (bc *Blockchain) GetAccountState(scriptHash util.Uint160) *state.Account

GetAccountState returns the account state from its script hash.

func (*Blockchain) GetAppExecResult 

func (bc *Blockchain) GetAppExecResult(hash util.Uint256) (*state.AppExecResult, error)

GetAppExecResult returns application execution result by the given tx hash.

func (*Blockchain) GetAssetState 

func (bc *Blockchain) GetAssetState(assetID util.Uint256) *state.Asset

GetAssetState returns asset state from its assetID.

func (*Blockchain) GetBlock 

func (bc *Blockchain) GetBlock(hash util.Uint256) (*block.Block, error)

GetBlock returns a Block by the given hash.

func (*Blockchain) GetConfig 

func (bc *Blockchain) GetConfig() config.ProtocolConfiguration

GetConfig returns the config stored in the blockchain.

func (*Blockchain) GetContractState 

func (bc *Blockchain) GetContractState(hash util.Uint160) *state.Contract

GetContractState returns contract by its script hash.

func (*Blockchain) GetEnrollments 

func (bc *Blockchain) GetEnrollments() ([]*state.Validator, error)

GetEnrollments returns all registered validators and non-registered SB validators

func (*Blockchain) GetHeader 

func (bc *Blockchain) GetHeader(hash util.Uint256) (*block.Header, error)

GetHeader returns data block header identified with the given hash value.

func (*Blockchain) GetHeaderHash 

func (bc *Blockchain) GetHeaderHash(i int) (hash util.Uint256)

GetHeaderHash returns the hash from the headerList by its height/index.

func (*Blockchain) GetMemPool 

func (bc *Blockchain) GetMemPool() *mempool.Pool

GetMemPool returns the memory pool of the blockchain.

func (*Blockchain) GetNEP5Balances 

func (bc *Blockchain) GetNEP5Balances(acc util.Uint160) *state.NEP5Balances

GetNEP5Balances returns NEP5 balances for the acc.

func (*Blockchain) GetNEP5TransferLog 

func (bc *Blockchain) GetNEP5TransferLog(acc util.Uint160) *state.NEP5TransferLog

GetNEP5TransferLog returns NEP5 transfer log for the acc.

func (*Blockchain) GetScriptHashesForVerifying 

func (bc *Blockchain) GetScriptHashesForVerifying(t *transaction.Transaction) ([]util.Uint160, error)

GetScriptHashesForVerifying returns all the ScriptHashes of a transaction which will be use to verify whether the transaction is bonafide or not. Golang implementation of GetScriptHashesForVerifying method in C# (https://github.com/neo-project/neo/blob/master/neo/Network/P2P/Payloads/Transaction.cs#L190)

func (*Blockchain) GetStandByValidators 

func (bc *Blockchain) GetStandByValidators() (keys.PublicKeys, error)

GetStandByValidators returns validators from the configuration.

func (*Blockchain) GetStorageItem 

func (bc *Blockchain) GetStorageItem(scripthash util.Uint160, key []byte) *state.StorageItem

GetStorageItem returns an item from storage.

func (*Blockchain) GetStorageItems 

func (bc *Blockchain) GetStorageItems(hash util.Uint160) (map[string]*state.StorageItem, error)

GetStorageItems returns all storage items for a given scripthash.

func (*Blockchain) GetTestVM 

func (bc *Blockchain) GetTestVM() *vm.VM

GetTestVM returns a VM and a Store setup for a test run of some sort of code.

func (*Blockchain) GetTransaction 

func (bc *Blockchain) GetTransaction(hash util.Uint256) (*transaction.Transaction, uint32, error)

GetTransaction returns a TX and its height by the given hash.

func (*Blockchain) GetTransactionResults 

func (bc *Blockchain) GetTransactionResults(t *transaction.Transaction) []*transaction.Result

GetTransactionResults returns the transaction results aggregate by assetID. Golang of GetTransationResults method in C# (https://github.com/neo-project/neo/blob/master/neo/Network/P2P/Payloads/Transaction.cs#L207)

func (*Blockchain) GetUnspentCoinState 

func (bc *Blockchain) GetUnspentCoinState(hash util.Uint256) *state.UnspentCoin

GetUnspentCoinState returns unspent coin state for given tx hash.

func (*Blockchain) GetValidators 

func (bc *Blockchain) GetValidators(txes ...*transaction.Transaction) ([]*keys.PublicKey, error)

GetValidators returns validators. Golang implementation of GetValidators method in C# (https://github.com/neo-project/neo/blob/c64748ecbac3baeb8045b16af0d518398a6ced24/neo/Persistence/Snapshot.cs#L182)

func (*Blockchain) HasBlock 

func (bc *Blockchain) HasBlock(hash util.Uint256) bool

HasBlock returns true if the blockchain contains the given block hash.

func (*Blockchain) HasTransaction 

func (bc *Blockchain) HasTransaction(hash util.Uint256) bool

HasTransaction returns true if the blockchain contains he given transaction hash.

func (*Blockchain) HeaderHeight 

func (bc *Blockchain) HeaderHeight() uint32

HeaderHeight returns the index/height of the highest header.

func (*Blockchain) IsLowPriority 

func (bc *Blockchain) IsLowPriority(fee util.Fixed8) bool

IsLowPriority checks given fee for being less than configured LowPriorityThreshold.

func (*Blockchain) LastBatch 

func (bc *Blockchain) LastBatch() *storage.MemBatch

LastBatch returns last persisted storage batch.

func (*Blockchain) NetworkFee 

func (bc *Blockchain) NetworkFee(t *transaction.Transaction) util.Fixed8

NetworkFee returns network fee.

func (*Blockchain) PoolTx 

func (bc *Blockchain) PoolTx(t *transaction.Transaction) error

PoolTx verifies and tries to add given transaction into the mempool.

func (*Blockchain) References 

func (bc *Blockchain) References(t *transaction.Transaction) ([]transaction.InOut, error)

References maps transaction's inputs into a slice of InOuts, effectively joining each Input with the corresponding Output. @TODO: unfortunately we couldn't attach this method to the Transaction struct in the transaction package because of a import cycle problem. Perhaps we should think to re-design the code base to avoid this situation.

func (*Blockchain) RegisterNative 

func (bc *Blockchain) RegisterNative(c native.Contract)

RegisterNative registers native contract in the blockchain.

func (*Blockchain) Run 

func (bc *Blockchain) Run()

Run runs chain loop.

func (*Blockchain) SystemFee 

func (bc *Blockchain) SystemFee(t *transaction.Transaction) util.Fixed8

SystemFee returns system fee.

func (*Blockchain) VerifyTx 

func (bc *Blockchain) VerifyTx(t *transaction.Transaction, block *block.Block) error

VerifyTx verifies whether a transaction is bonafide or not. Block parameter is used for easy interop access and can be omitted for transactions that are not yet added into any block. Golang implementation of Verify method in C# (https://github.com/neo-project/neo/blob/master/neo/Network/P2P/Payloads/Transaction.cs#L270).

type HeaderHashList 

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

A HeaderHashList represents a list of header hashes. This data structure in not routine safe and should be used under some kind of protection against race conditions.

func NewHeaderHashList 

func NewHeaderHashList(hashes ...util.Uint256) *HeaderHashList

NewHeaderHashList returns a new pointer to a HeaderHashList.

func NewHeaderHashListFromBytes 

func NewHeaderHashListFromBytes(b []byte) (*HeaderHashList, error)

NewHeaderHashListFromBytes returns a new hash list from the given bytes.

func (*HeaderHashList) Add 

func (l *HeaderHashList) Add(h ...util.Uint256)

Add appends the given hash to the list of hashes.

func (*HeaderHashList) Get 

func (l *HeaderHashList) Get(i int) util.Uint256

Get returns the hash by the given index.

func (*HeaderHashList) Last 

func (l *HeaderHashList) Last() util.Uint256

Last return the last hash in the HeaderHashList.

func (*HeaderHashList) Len 

func (l *HeaderHashList) Len() int

Len returns the length of the underlying hashes slice.

func (*HeaderHashList) Slice 

func (l *HeaderHashList) Slice(start, end int) []util.Uint256

Slice return a subslice of the underlying hashes. Subsliced from start to end. Example: 

headers := headerList.Slice(0, 2000)

func (*HeaderHashList) Write 

func (l *HeaderHashList) Write(bw *io.BinWriter, start, n int) error

WriteTo writes n underlying hashes to the given BinWriter starting from start.

type StorageContext 

type StorageContext struct {
	ScriptHash util.Uint160
	ReadOnly   bool
}

StorageContext contains storing script hash and read/write flag, it's used as a context for storage manipulation functions.

Source Files

View all Source files

Directories

Path Synopsis
crypto
enumerator
iterator
runtime

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