core

package
v0.0.0-...-eef6c14 Latest Latest
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 Go to latest Published: Aug 9, 2018 License: MIT Imports: 21 Imported by: 0

Documentation

Index

Constants

View Source 
const BlockBucket = "blocks"

BlockBucket is the name of the bucket for the blockchain database

View Source 
const BlockFile = "%s.blk"

BlockFile is the format of block filenames

View Source 
const IndexDB = "bc_%s.db" // node id

IndexDB is the database file for the node

Variables

View Source 
var (
	//ErrUnableToExport occurs when unable to write blockfile to disk
	ErrUnableToExport = errors.New("Unable to export block")
	//ErrHashModification occurs when hash of block is attempted to be modified
	ErrHashModification = errors.New("Attempt to modify hash value of block")
)
View Source 
var (
	//ErrUnverifiedBlock when unable to verify block
	ErrUnverifiedBlock = errors.New("Unverified block cannot be added to the blockchain")
	//ErrJobNotFound when unable to find job in bc
	ErrJobNotFound = errors.New("Job not found")
	//ErrBlockNotFound when unable to finc block in the bc
	ErrBlockNotFound = errors.New("Blockinfo not found")
)
View Source 
var BlockPathDev = path.Join(os.Getenv("HOME"), ".gizo-dev", "blocks")

BlockPathDev is the path block files are saved on the disk for development

View Source 
var BlockPathProd = path.Join(os.Getenv("HOME"), ".gizo", "blocks")

BlockPathProd is the path block files are saved on the disk for production

View Source 
var IndexPathDev = path.Join(os.Getenv("HOME"), ".gizo-dev")

IndexPathDev is the path database files are saved on the disk for development

View Source 
var IndexPathProd = path.Join(os.Getenv("HOME"), ".gizo")

IndexPathProd is the path database files are saved on the disk for production

Functions

func InitializeDataPath 

func InitializeDataPath()

InitializeDataPath creates .gizo folder and block subfolder

func RemoveDataPath 

func RemoveDataPath()

RemoveDataPath delete's .gizo / .gizo-dev folder

Types

type Block 

type Block struct {
	Header     BlockHeader
	Jobs       []*merkletree.MerkleNode
	Height     uint64
	ReceivedAt int64  //time it was received
	By         string // id of node that generated block
}

Block - the foundation of blockchain

func GenesisBlock 

func GenesisBlock(by string) *Block

GenesisBlock returns genesis block

func NewBlock 

func NewBlock(tree merkletree.MerkleTree, pHash string, height uint64, difficulty uint8, by string) (*Block, error)

NewBlock returns a new block

func (Block) DeleteFile 

func (b Block) DeleteFile() error

DeleteFile deletes block file on disk

func (Block) Export 

func (b Block) Export() error

Export writes block on disk

func (Block) GetBy 

func (b Block) GetBy() string

GetBy returns id of node that mined block

func (Block) GetHeader 

func (b Block) GetHeader() BlockHeader

GetHeader returns the block header

func (Block) GetHeight 

func (b Block) GetHeight() uint64

GetHeight returns the block height

func (Block) GetNodes 

func (b Block) GetNodes() []*merkletree.MerkleNode

GetNodes retuns the block's merklenodes

func (*Block) Import 

func (b *Block) Import(hash string) error

Import reads block file into memory

func (*Block) IsEmpty 

func (b *Block) IsEmpty() bool

IsEmpty returns true is block is empty

func (*Block) VerifyBlock 

func (b *Block) VerifyBlock() (bool, error)

VerifyBlock verifies a block

type BlockChain 

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

BlockChain - singly linked list of blocks

func CreateBlockChain 

func CreateBlockChain(nodeID string) *BlockChain

CreateBlockChain initializes a db, set's the tip to GenesisBlock and returns the blockchain

func (*BlockChain) AddBlock 

func (bc *BlockChain) AddBlock(block *Block) error

AddBlock adds block to the blockchain

func (*BlockChain) FindExec 

func (bc *BlockChain) FindExec(id string, hash string) (*job.Exec, error)

FindExec finds exec in the bc

func (*BlockChain) FindJob 

func (bc *BlockChain) FindJob(id string) (*job.Job, error)

FindJob returns the job from the blockchain

func (*BlockChain) FindMerkleNode 

func (bc *BlockChain) FindMerkleNode(h string) (*merkletree.MerkleNode, error)

FindMerkleNode returns the merklenode from the blockchain

func (*BlockChain) GetBlockByHeight 

func (bc *BlockChain) GetBlockByHeight(height int) (*Block, error)

GetBlockByHeight return block by height

func (*BlockChain) GetBlockHashes 

func (bc *BlockChain) GetBlockHashes() ([]string, error)

GetBlockHashes returns all the hashes of all the blocks in the current bc

func (*BlockChain) GetBlockHashesHex 

func (bc *BlockChain) GetBlockHashesHex() ([]string, error)

GetBlockHashesHex returns hashes (hex) of all the blocks in the bc

func (*BlockChain) GetBlockInfo 

func (bc *BlockChain) GetBlockInfo(hash string) (*BlockInfo, error)

GetBlockInfo returns the blockinfo of a particular block from the db

func (*BlockChain) GetBlocksWithinMinute 

func (bc *BlockChain) GetBlocksWithinMinute() ([]Block, error)

GetBlocksWithinMinute returns all blocks in the db within the last minute

func (*BlockChain) GetJobExecs 

func (bc *BlockChain) GetJobExecs(id string) ([]job.Exec, error)

GetJobExecs returns all execs of a job

func (*BlockChain) GetLatest15 

func (bc *BlockChain) GetLatest15() ([]Block, error)

GetLatest15 retuns the latest 15 blocks

func (*BlockChain) GetLatestBlock 

func (bc *BlockChain) GetLatestBlock() (*Block, error)

GetLatestBlock returns the tip as a block

func (*BlockChain) GetLatestHeight 

func (bc *BlockChain) GetLatestHeight() (int, error)

GetLatestHeight returns the height of the latest block to the blockchain

func (BlockChain) GetNextHeight 

func (bc BlockChain) GetNextHeight() (uint64, error)

GetNextHeight returns the next height in the blockchain

func (BlockChain) GetPrevHash 

func (bc BlockChain) GetPrevHash() (string, error)

GetPrevHash returns the hash of the last block in the bc

func (*BlockChain) InitGenesisBlock 

func (bc *BlockChain) InitGenesisBlock(nodeID string)

InitGenesisBlock creates genesis block

func (*BlockChain) Verify 

func (bc *BlockChain) Verify() (bool, error)

Verify verifies the blockchain

type BlockChainIterator 

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

BlockChainIterator - a way to loop through the blockchain (from newest block to oldest block)

func (BlockChainIterator) GetCurrent 

func (i BlockChainIterator) GetCurrent() []byte

GetCurrent returns current block

func (*BlockChainIterator) Next 

func (i *BlockChainIterator) Next() (*Block, error)

Next returns the next block in the blockchain

func (*BlockChainIterator) NextBlockinfo 

func (i *BlockChainIterator) NextBlockinfo() (*BlockInfo, error)

NextBlockinfo returns the next blockinfo in the blockchain - more lightweight

type BlockHeader 

type BlockHeader struct {
	Timestamp     int64
	PrevBlockHash string
	MerkleRoot    string // hash of merkle root
	Nonce         uint64
	Difficulty    *big.Int
	Hash          string
}

BlockHeader holds the header of the block

func (BlockHeader) GetDifficulty 

func (bh BlockHeader) GetDifficulty() *big.Int

GetDifficulty returns difficulty

func (BlockHeader) GetHash 

func (bh BlockHeader) GetHash() string

GetHash returns hash

func (BlockHeader) GetMerkleRoot 

func (bh BlockHeader) GetMerkleRoot() string

GetMerkleRoot returns merkleroot

func (BlockHeader) GetNonce 

func (bh BlockHeader) GetNonce() uint64

GetNonce returns the nonce

func (BlockHeader) GetPrevBlockHash 

func (bh BlockHeader) GetPrevBlockHash() string

GetPrevBlockHash returns previous block hash

func (BlockHeader) GetTimestamp 

func (bh BlockHeader) GetTimestamp() int64

GetTimestamp returns timestamp

type BlockInfo 

type BlockInfo struct {
	Header    BlockHeader
	Height    uint64
	TotalJobs uint
	FileName  string
	FileSize  int64
}

BlockInfo - model of data written to embedded database

func (BlockInfo) GetBlock 

func (bi BlockInfo) GetBlock() *Block

GetBlock - imports block from file into memory

func (BlockInfo) GetFileName 

func (bi BlockInfo) GetFileName() string

GetFileName returns filename

func (BlockInfo) GetFileSize 

func (bi BlockInfo) GetFileSize() int64

GetFileSize returns the blocks filesize

func (BlockInfo) GetHeader 

func (bi BlockInfo) GetHeader() BlockHeader

GetHeader returns block header

func (BlockInfo) GetHeight 

func (bi BlockInfo) GetHeight() uint64

GetHeight return height

func (BlockInfo) GetTotalJobs 

func (bi BlockInfo) GetTotalJobs() uint

GetTotalJobs returns total jobs

type POW 

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

POW - consensus algorithm

func NewPOW 

func NewPOW(b *Block) *POW

NewPOW returns POW

func (POW) GetBlock 

func (p POW) GetBlock() *Block

GetBlock returns block

func (POW) GetDifficulty 

func (p POW) GetDifficulty() uint8

GetDifficulty returns difficulty

func (POW) GetTarget 

func (p POW) GetTarget() *big.Int

GetTarget returns target

func (*POW) Validate 

func (p *POW) Validate() (bool, error)

Validate - validates POW

Source Files

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