core

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v0.0.0-...-46cf522 Latest Latest
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 Go to latest Published: Jul 15, 2018 License: MIT Imports: 11 Imported by: 0

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Functions

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Types

type Block 

type Block struct {
	Transactions []Transaction
	// contains filtered or unexported fields
}

Block conains a group of valid transactions and the cryptographic hash of the prior block in the blockchain

func CreateFirstBlock 

func CreateFirstBlock(timeStampMs uint64, minerAddress *rsa.PublicKey) *Block

CreateFirstBlock create first block of a chain.

func CreateNextBlock 

func CreateNextBlock(prevBlock *Block, timeStamp uint64, minerAddress *rsa.PublicKey, naunce uint64, transactions []Transaction) *Block

CreateNextBlock create next block of a chain.

func CreateNextEmptyBlock 

func CreateNextEmptyBlock(prevBlock *Block, timeStamp uint64, minerAddress *rsa.PublicKey) *Block

CreateNextEmptyBlock create next empty block of a chain.

func (*Block) AddTransaction 

func (block *Block) AddTransaction(tran *Transaction)

AddTransaction add a transaction to current block.

func (*Block) AddTransactions 

func (block *Block) AddTransactions(trans []Transaction)

AddTransactions add a series transactions to current block.

func (*Block) FinalizeBlockAt 

func (block *Block) FinalizeBlockAt(naunce uint64, timeStampMs uint64)

FinalizeBlockAt Finalize a block with specified timestamp

func (*Block) GetBlockHash 

func (block *Block) GetBlockHash() [config.HashSize]byte

GetBlockHash Get hash value of block

func (*Block) Print 

func (block *Block) Print() string

Print details of block

func (*Block) VerifyBlockHash 

func (block *Block) VerifyBlockHash() bool

VerifyBlockHash Verify block hash

type Blockchain 

type Blockchain struct {

	/* fields to support wallet */
	AddressMap      map[rsa.PublicKey]map[UTXO]bool /* map of all Addresses to their utxo list */
	TransactionPool map[string]*Transaction         /* all transaction broadcastd by user */
	// contains filtered or unexported fields
}

A Blockchain contains - a chain of blocks indexed by hash and block index - a set of unspent transaction output - a set of Transactions indexed by tx hash

func InitializeBlockchainWithDiff 

func InitializeBlockchainWithDiff(gensisAddress *rsa.PublicKey, diff Difficulty) Blockchain

InitializeBlockchainWithDiff creates a blockchain from scratch

func (*Blockchain) AcceptBroadcastedTransaction 

func (chain *Blockchain) AcceptBroadcastedTransaction(tran *Transaction)

AcceptBroadcastedTransaction Accept transaction which broadchated by others.

func (*Blockchain) AddBlock 

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

AddBlock Append the block to the end of the chain. TODO: Support appending the block to a block that is a few blocks ahead of the end

func (*Blockchain) BalanceOf 

func (chain *Blockchain) BalanceOf(Address *rsa.PublicKey) uint64

BalanceOf Check the balance of an Address

func (*Blockchain) GetDifficulty 

func (chain *Blockchain) GetDifficulty() Difficulty

GetDifficulty Get difficulty

func (*Blockchain) GetLatestBlock 

func (chain *Blockchain) GetLatestBlock() *Block

GetLatestBlock Get the latest block

func (*Blockchain) GetNLatestBlock 

func (chain *Blockchain) GetNLatestBlock(n int) *Block

GetNLatestBlock Get specified amount of latest blocks.

func (*Blockchain) Print 

func (chain *Blockchain) Print() string

Print details of a chain.

func (*Blockchain) PrintAddressMap 

func (chain *Blockchain) PrintAddressMap() string

PrintAddressMap Print information of 'AddressMap' in a chain.

func (*Blockchain) PrintBlockList 

func (chain *Blockchain) PrintBlockList() string

PrintBlockList Print information of 'blockList' in a chain.

func (*Blockchain) PrintTransactionPool 

func (chain *Blockchain) PrintTransactionPool() string

PrintTransactionPool Print details information of transactions in a chain.

func (*Blockchain) PrintTxMap 

func (chain *Blockchain) PrintTxMap() string

PrintTxMap Print information of 'TxMap' in a chain.

func (*Blockchain) PrintUTXOMap 

func (chain *Blockchain) PrintUTXOMap() string

PrintUTXOMap Print information of 'utxoMap' in a chain.

func (*Blockchain) ReachDifficulty 

func (chain *Blockchain) ReachDifficulty(block *Block) bool

ReachDifficulty Check whether the chain has reach difficulty

func (*Blockchain) RegisterUser 

func (chain *Blockchain) RegisterUser(user rsa.PublicKey, utxoMap map[UTXO]bool)

RegisterUser Register user

func (*Blockchain) TransferCoin 

func (chain *Blockchain) TransferCoin(from *rsa.PublicKey, to *rsa.PublicKey, amount uint64, fee uint64) (*Transaction, error)

TransferCoin Make a transaction to transfer coins from one account to target Address. Return nil if there is insufficient fund or amount is zero Note that the transaction is unsigned

type Difficulty 

type Difficulty interface {
	ReachDifficulty(hash [config.HashSize]byte) bool
	UpdateDifficulty(usedTimeMs uint64) error
	Print() string
}

Difficulty used for encapsulate check/update/print functions relevant the calcuate difficulty.

func CreateMADifficulty 

func CreateMADifficulty(targetBlockIntervalMs uint64, prob float64, maSamples uint32) Difficulty

CreateMADifficulty Create a MADifficulty

func CreateSimpleDifficulty 

func CreateSimpleDifficulty(targetBlockIntervalMs uint64, prob float64) Difficulty

CreateSimpleDifficulty Create a 'SimpleDifficulty'

type MADifficulty 

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

MADifficulty Moving average difficulty algorithm Note that BCH's new difficulty algorithm is similar to the algorithm with - target interval is 10mins - maSamples is 144 That is moving average over the difficulty in a day

func (*MADifficulty) Print 

func (d *MADifficulty) Print() string

Print details of a MADifficulty

func (*MADifficulty) ReachDifficulty 

func (d *MADifficulty) ReachDifficulty(hash [config.HashSize]byte) bool

ReachDifficulty Check whether the block has reached the difficulty

func (*MADifficulty) UpdateDifficulty 

func (d *MADifficulty) UpdateDifficulty(usedTimeMs uint64) error

UpdateDifficulty Update the difficulty

type SimpleDifficulty 

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

SimpleDifficulty A simple wrapper of difficulty.

func (*SimpleDifficulty) Print 

func (d *SimpleDifficulty) Print() string

Print details of a SimpleDifficulty

func (*SimpleDifficulty) ReachDifficulty 

func (d *SimpleDifficulty) ReachDifficulty(hash [config.HashSize]byte) bool

ReachDifficulty Check whether the block has reached the difficulty

func (*SimpleDifficulty) UpdateDifficulty 

func (d *SimpleDifficulty) UpdateDifficulty(usedTimeMs uint64) error

UpdateDifficulty Update the difficulty

type Transaction 

type Transaction struct {
	ID      string
	Inputs  []TransactionInput
	Outputs []TransactionOutput
	Sender  rsa.PublicKey
}

Transaction contains a list of Inputs and Outputs. To become a valid transation, it must contain the all signatures from all users

func CreateTransaction 

func CreateTransaction(ninput int, noutput int) Transaction

CreateTransaction create a transaction with specified count of inputs and outputs

func (*Transaction) GetRawDataToHash 

func (tran *Transaction) GetRawDataToHash() []byte

GetRawDataToHash Get the raw data to hash the whole transaction

func (*Transaction) GetRawDataToHashForTest 

func (tran *Transaction) GetRawDataToHashForTest() []byte

GetRawDataToHashForTest Get the raw data to hash the whole transaction

func (Transaction) Print 

func (tran Transaction) Print() string

Print details of transaction

func (*Transaction) SignTransaction 

func (tran *Transaction) SignTransaction(signers []*rsa.PrivateKey) error

SignTransaction Sign a transaction in place (in practice, it should be called by each signer individually)

func (*Transaction) VerifyTransaction 

func (tran *Transaction) VerifyTransaction(inputAddresses []*rsa.PublicKey) error

VerifyTransaction Verify whether a transaction has valid signatures. Note that it doesn't verify whether the transaction is valid in the chain.

type TransactionInput 

type TransactionInput struct {
	PrevtxMap   [config.HashSize]byte
	OutputIndex uint32
	Signature   []byte
}

TransactionInput is a reference to an output of a previous transaction

func (TransactionInput) Print 

func (input TransactionInput) Print() string

Print details of transaction input

type TransactionOutput 

type TransactionOutput struct {
	Value   uint64
	Address rsa.PublicKey
}

TransactionOutput contains instructions for sending bitcoins.

func (TransactionOutput) Print 

func (output TransactionOutput) Print() string

Print details of transaction output

type UTXO 

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

UTXO = Unspent Transaction Output

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