blockchain

package
v0.0.0-...-d2f3a32 Latest Latest
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 Go to latest Published: Nov 18, 2019 License: GPL-3.0 Imports: 21 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var KnownNodes = []string{"localhost:3000"}

Functions

func SendTx 

func SendTx(addr string, tnx *Transaction)

func StartServer 

func StartServer(nodeID, minerAddress string)

StartServer starts a node

Types

type Block 

type Block struct {
	Timestamp     int64
	Transactions  []*Transaction
	PrevBlockHash []byte
	Hash          []byte
	Nonce         int
	Height        int
}

Block keeps block headers

func DeserializeBlock 

func DeserializeBlock(d []byte) *Block

DeserializeBlock deserializes a block

func NewBlock 

func NewBlock(transactions []*Transaction, prevBlockHash []byte, height int) *Block

NewBlock creates and returns Block

func NewGenesisBlock 

func NewGenesisBlock(coinbase *Transaction) *Block

NewGenesisBlock creates and returns genesis Block

func (*Block) HashTransactions 

func (b *Block) HashTransactions() []byte

HashTransactions returns a hash of the transactions in the block

func (*Block) Serialize 

func (b *Block) Serialize() []byte

Serialize serializes the block

type Blockchain 

type Blockchain struct {
	Tip []byte
	Db  *bolt.DB
}

Blockchain keeps a sequence of Blocks

func CreateBlockchain 

func CreateBlockchain(address, nodeID string) *Blockchain

CreateBlockchain creates a new blockchain DB

func NewBlockchain 

func NewBlockchain(nodeID string) *Blockchain

NewBlockchain creates a new Blockchain with genesis Block

func (*Blockchain) AddBlock 

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

AddBlock saves the block into the blockchain

func (*Blockchain) FindTransaction 

func (bc *Blockchain) FindTransaction(ID []byte) (Transaction, error)

FindTransaction finds a transaction by its ID

func (*Blockchain) FindUTXO 

func (bc *Blockchain) FindUTXO() map[string]TXOutputs

FindUTXO finds all unspent transaction outputs and returns transactions with spent outputs removed

func (*Blockchain) GetBestHeight 

func (bc *Blockchain) GetBestHeight() int

GetBestHeight returns the height of the latest block

func (*Blockchain) GetBlock 

func (bc *Blockchain) GetBlock(blockHash []byte) (Block, error)

GetBlock finds a block by its hash and returns it

func (*Blockchain) GetBlockHashes 

func (bc *Blockchain) GetBlockHashes() [][]byte

GetBlockHashes returns a list of hashes of all the blocks in the chain

func (*Blockchain) Iterator 

func (bc *Blockchain) Iterator() *BlockchainIterator

Iterator ...

func (*Blockchain) MineBlock 

func (bc *Blockchain) MineBlock(transactions []*Transaction) *Block

MineBlock saves provided data as a block in the blockchain

func (*Blockchain) SignTransaction 

func (bc *Blockchain) SignTransaction(tx *Transaction, privKey ecdsa.PrivateKey)

SignTransaction signs inputs of a Transaction

func (*Blockchain) VerifyTransaction 

func (bc *Blockchain) VerifyTransaction(tx *Transaction) bool

VerifyTransaction verifies transaction input signatures

type BlockchainIterator 

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

BlockchainIterator is used to iterate over blockchain blocks

func (*BlockchainIterator) Next 

func (i *BlockchainIterator) Next() *Block

Next returns next block starting from the tip

type ProofOfWork 

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

ProofOfWork represents a proof-of-work

func NewProofOfWork 

func NewProofOfWork(b *Block) *ProofOfWork

NewProofOfWork builds and returns a ProofOfWork

func (*ProofOfWork) Run 

func (pow *ProofOfWork) Run() (int, []byte)

Run performs a proof-of-work

func (*ProofOfWork) Validate 

func (pow *ProofOfWork) Validate() bool

Validate validates block's PoW

type TXInput 

type TXInput struct {
	Txid      []byte
	Vout      int
	Signature []byte
	PubKey    []byte
}

TXInput represents a transaction input

func (*TXInput) UsesKey 

func (in *TXInput) UsesKey(pubKeyHash []byte) bool

UsesKey checks whether the address initiated the transaction

type TXOutput 

type TXOutput struct {
	Value      int
	PubKeyHash []byte
}

TXOutput represents a transaction output

func NewTXOutput 

func NewTXOutput(value int, address string) *TXOutput

NewTXOutput create a new TXOutput

func (*TXOutput) IsLockedWithKey 

func (out *TXOutput) IsLockedWithKey(pubKeyHash []byte) bool

IsLockedWithKey checks if the output can be used by the owner of the pubkey

func (*TXOutput) Lock 

func (out *TXOutput) Lock(address []byte)

Lock signs the output

type TXOutputs 

type TXOutputs struct {
	Outputs []TXOutput
}

TXOutputs collects TXOutput

func DeserializeOutputs 

func DeserializeOutputs(data []byte) TXOutputs

DeserializeOutputs deserializes TXOutputs

func (TXOutputs) Serialize 

func (outs TXOutputs) Serialize() []byte

Serialize serializes TXOutputs

type Transaction 

type Transaction struct {
	ID   []byte
	Vin  []TXInput
	Vout []TXOutput
}

Transaction represents a Bitcoin transaction

func DeserializeTransaction 

func DeserializeTransaction(data []byte) Transaction

DeserializeTransaction deserializes a transaction

func NewCoinbaseTX 

func NewCoinbaseTX(to, data string) *Transaction

NewCoinbaseTX creates a new coinbase transaction

func NewUTXOTransaction 

func NewUTXOTransaction(wallet *wallets.Wallet, to string, amount int, UTXOSet *UTXOSet) *Transaction

NewUTXOTransaction creates a new transaction

func (*Transaction) Hash 

func (tx *Transaction) Hash() []byte

Hash returns the hash of the Transaction

func (Transaction) IsCoinbase 

func (tx Transaction) IsCoinbase() bool

IsCoinbase checks whether the transaction is coinbase

func (Transaction) Serialize 

func (tx Transaction) Serialize() []byte

Serialize returns a serialized Transaction

func (*Transaction) Sign 

func (tx *Transaction) Sign(privKey ecdsa.PrivateKey, prevTXs map[string]Transaction)

Sign signs each input of a Transaction

func (Transaction) String 

func (tx Transaction) String() string

String returns a human-readable representation of a transaction

func (*Transaction) TrimmedCopy 

func (tx *Transaction) TrimmedCopy() Transaction

TrimmedCopy creates a trimmed copy of Transaction to be used in signing

func (*Transaction) Verify 

func (tx *Transaction) Verify(prevTXs map[string]Transaction) bool

Verify verifies signatures of Transaction inputs

type UTXOSet 

type UTXOSet struct {
	Blockchain *Blockchain
}

UTXOSet represents UTXO set

func (UTXOSet) CountTransactions 

func (u UTXOSet) CountTransactions() int

CountTransactions returns the number of transactions in the UTXO set

func (UTXOSet) FindSpendableOutputs 

func (u UTXOSet) FindSpendableOutputs(pubkeyHash []byte, amount int) (int, map[string][]int)

FindSpendableOutputs finds and returns unspent outputs to reference in inputs

func (UTXOSet) FindUTXO 

func (u UTXOSet) FindUTXO(pubKeyHash []byte) []TXOutput

FindUTXO finds UTXO for a public key hash

func (UTXOSet) Reindex 

func (u UTXOSet) Reindex()

Reindex rebuilds the UTXO set

func (UTXOSet) Update 

func (u UTXOSet) Update(block *Block)

Update updates the UTXO set with transactions from the Block The Block is considered to be the tip of a blockchain

Source Files

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