core

package
v0.0.0-...-77fbf23 Latest Latest
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 Go to latest Published: Jun 16, 2019 License: GPL-3.0 Imports: 16 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var GenesisHashTxInput = HashBytes([]byte("genesis"))

Functions

func CalculatePoW 

func CalculatePoW(data PoWData, difficulty uint64) (uint64, error)

CalculatePoW calculates the nonce for the given data in order to fit in the current Proof of Work difficulty

func CheckBlockPoW 

func CheckBlockPoW(block *Block, difficulty uint64) bool

func CheckPoW 

func CheckPoW(hash Hash, difficulty uint64) bool

CheckPoW verifies the PoW difficulty of a Hash

func CheckTx 

func CheckTx(tx *Tx) bool

CheckTx checks if the transaction is consistent

func NewKey 

func NewKey() (*ecdsa.PrivateKey, error)

func PackPubK 

func PackPubK(pubK *ecdsa.PublicKey) []byte

func Uint64FromBytes 

func Uint64FromBytes(b []byte) uint64

func Uint64ToBytes 

func Uint64ToBytes(u uint64) []byte

func UnpackPubK 

func UnpackPubK(b []byte) *ecdsa.PublicKey

func VerifySignature 

func VerifySignature(pubK *ecdsa.PublicKey, m []byte, sig Signature) bool

Types

type Address 

type Address [32]byte

Address is the type data for addresses

func AddressFromPrivK 

func AddressFromPrivK(privK *ecdsa.PrivateKey) Address

func AddressFromPubK 

func AddressFromPubK(pubK *ecdsa.PublicKey) Address

func (Address) String 

func (addr Address) String() string

type Block 

type Block struct {
	Height    uint64
	PrevHash  Hash
	Txs       []Tx
	Miner     Address
	MinerPubK *ecdsa.PublicKey // tmp meanwhile no ecrecover function
	Timestamp time.Time
	Nonce     uint64
	Hash      Hash
	Signature []byte
}

Block holds the data structure for the block

func BlockFromBytes 

func BlockFromBytes(b []byte) (*Block, error)

func (Block) Bytes 

func (blk Block) Bytes() []byte

Bytes outputs a byte array containing the data of the Block

func (*Block) CalculateHash 

func (block *Block) CalculateHash()

func (*Block) CalculatePoW 

func (block *Block) CalculatePoW(difficulty uint64) error

func (Block) Copy 

func (block Block) Copy() *Block

func (*Block) GetNonce 

func (blk *Block) GetNonce() uint64

func (*Block) IncrementNonce 

func (blk *Block) IncrementNonce()

func (Block) Print 

func (block Block) Print()

for testing

type Blockchain 

type Blockchain struct {
	Id         []byte // Id allows to have multiple blockchains
	Difficulty uint64
	Genesis    Hash
	LastBlock  *Block

	PoA PoA
	// contains filtered or unexported fields
}

func NewBlockchain 

func NewBlockchain(database *db.Db, dif uint64) *Blockchain

func NewPoABlockchain 

func NewPoABlockchain(database *db.Db, authNodes []*ecdsa.PublicKey) *Blockchain

func (*Blockchain) AddBlock 

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

func (*Blockchain) GetBalance 

func (bc *Blockchain) GetBalance(pubK *ecdsa.PublicKey) (uint64, error)

func (*Blockchain) GetBlock 

func (bc *Blockchain) GetBlock(hash Hash) (*Block, error)

func (*Blockchain) GetHeight 

func (bc *Blockchain) GetHeight() uint64

func (*Blockchain) GetLastBlock 

func (bc *Blockchain) GetLastBlock() *Block

func (*Blockchain) GetPrevBlock 

func (bc *Blockchain) GetPrevBlock(hash Hash) (*Block, error)

func (*Blockchain) UpdateWalletsWithNewTx 

func (bc *Blockchain) UpdateWalletsWithNewTx(tx *Tx) error

func (*Blockchain) VerifyBlock 

func (bc *Blockchain) VerifyBlock(block *Block) bool

type Hash 

type Hash [32]byte

Hash is the type for a hash data packet

func HashBytes 

func HashBytes(b []byte) Hash

HashBytes performs a hash over a given byte array

func (*Hash) IsZero 

func (h *Hash) IsZero() bool

IsZero returns true if the Hash is empty (all zeroes)

func (*Hash) String 

func (h *Hash) String() string

type Input 

type Input struct {
	TxId  Hash
	Vout  int // index of the output from the TxId
	Value uint64
}

type Output 

type Output struct {
	Value uint64
}

type PoA 

type PoA struct {
	AuthMiners []*ecdsa.PublicKey
}

type PoWData 

type PoWData interface {
	Bytes() []byte
	GetNonce() uint64
	IncrementNonce()
}

PoWData is the interface for the data that have the Nonce parameter to calculate the Proof-of-Work

type Signature 

type Signature struct {
	R *big.Int
	S *big.Int
}

func Sign 

func Sign(privK *ecdsa.PrivateKey, m []byte) (*Signature, error)

func SignatureFromBytes 

func SignatureFromBytes(b []byte) (*Signature, error)

func (*Signature) Bytes 

func (sig *Signature) Bytes() []byte

type Tx 

type Tx struct {
	TxId       Hash
	From       *ecdsa.PublicKey
	To         *ecdsa.PublicKey
	InputCount uint64
	Inputs     []Input
	Outputs    []Output
	Signature  []byte
}

Tx holds the data structure of a transaction

func NewTx 

func NewTx(from, to *ecdsa.PublicKey, in []Input, out []Output) *Tx

func (*Tx) Bytes 

func (tx *Tx) Bytes() []byte

func (*Tx) CalculateTxId 

func (tx *Tx) CalculateTxId()

Source Files

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