blockchain

package
v0.0.0-...-ce5cf71 Latest Latest
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 Go to latest Published: Jan 13, 2021 License: Apache-2.0 Imports: 13 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func CalculateHash 

func CalculateHash(data string) []byte

CalculateHash calculates the Hash of a generic string Value

func PrintPublicAddress 

func PrintPublicAddress(k string) (string, error)

PrintPublicAddress prints the public key value from a given key.

Types

type Block 

type Block struct {
	Id uuid.UUID

	Transactions TransactionList
	Hash         []byte
	PreviousHash []byte
	// contains filtered or unexported fields
}

Block to be added to an existing BlockChain.

func NewBlock 

func NewBlock(t TransactionList) Block

NewBlock instantiates a new Block which can then be added to an existing BlockChain.

func (Block) CheckTransactions 

func (b Block) CheckTransactions() bool

CheckTransactions in the Block. Calls VerifyTransactions underneath.

func (*Block) MineBlock 

func (b *Block) MineBlock(d int32)

MineBlock recalculates the Hash to establish proof of work.

func (Block) ReCalculateHash 

func (b Block) ReCalculateHash() []byte

ReCalculateHash is used for under the Verify function. Used for checking stored vs actual hashes.

func (Block) String 

func (b Block) String() string

String outputs a Block in JSON string format.

type BlockChain 

type BlockChain struct {
	Chain               []Block
	Difficulty          int32
	PendingTransactions TransactionList
	MiningReward        float32
}

BlockChain object to be instantiated and to have Blocks appended to its Genesis Block

func NewBlockChain 

func NewBlockChain(d int32, mr float32) *BlockChain

NewBlockChain instantiates a new BlockChain to be used. Can append existing Blocks to it.

func (*BlockChain) GetAllBalances 

func (bc *BlockChain) GetAllBalances() string

GetAllBalances in the BlockChain from Genesis.

func (*BlockChain) GetBalance 

func (bc *BlockChain) GetBalance(address []byte) float32

GetBalance retrieves the address' current balance from Genesis Block -> last Block

func (BlockChain) GetLatestBlock 

func (bc BlockChain) GetLatestBlock() Block

GetLatestBlock returns the final Block in the BlockChain

func (*BlockChain) MineTransactions 

func (bc *BlockChain) MineTransactions(address []byte)

MineTransactions mines current pending Transactions on the BlockChain

func (*BlockChain) PushTransactions 

func (bc *BlockChain) PushTransactions(tx ...Transaction) error

PushTransactions to the BlockChain, use MineTransactions to process them.

func (BlockChain) String 

func (bc BlockChain) String() string

String outputs the BlockChain and its underlying Blocks in JSON string format.

func (BlockChain) Verify 

func (bc BlockChain) Verify() bool

Verify is used to verify the integrity of the BlockChain. From the last Block to Genesis, the PreviousHash field should be linked to the proper prior Block's Hash field. Similar to a singly linked list.

type Key 

type Key struct {
	Name string
	Key  *ecdsa.PrivateKey
}

Key object to handle BlockChain internals.

func LoadKey 

func LoadKey(n string) (*Key, error)

LoadKey loads the Key from a file path to memory.

func NewKey 

func NewKey(n string) (*Key, error)

NewKey will create a new ECDSA key pair under Key. If one already exists, it will return the current pair. Working directory is current directory.

func (*Key) Delete 

func (k *Key) Delete() error

Delete the Key in the working directory.

type Transaction 

type Transaction struct {
	FromAddress []byte
	ToAddress   []byte
	Amount      float32
	Signature   []byte
}

Transaction type to be used within a Block inside the BlockChain

func NewTransaction 

func NewTransaction(f, t []byte, a float32) Transaction

NewTransaction instantiates a new transaction to be mined in the BlockChain

func ReadTransactionFromJSON 

func ReadTransactionFromJSON() (*Transaction, error)

ReadTransactionFromJSON reads a Transaction from the working directory in transaciotn.json and loads it into memory.

func (Transaction) SaveTransactionToJSON 

func (t Transaction) SaveTransactionToJSON() error

SaveTransactionToJSON saves a Transaction to the working directory named transaction.json. Only 1 Transaction can be saved.

func (*Transaction) SignTransaction 

func (t *Transaction) SignTransaction(k *Key) error

SignTransaction signs a Transaction with a Key

func (Transaction) String 

func (t Transaction) String() string

String outputs a Transaction in JSON string format.

func (*Transaction) VerifyTransaction 

func (t *Transaction) VerifyTransaction() bool

VerifyTransaction checks the signature, calculated hash and public key to see if they match.

type TransactionList 

type TransactionList []Transaction

TransactionList used to process Transactions in a BlockChain

func (TransactionList) String 

func (tx TransactionList) String() string

String outputs a TransactionList in JSON string format.

Source Files

View all Source files

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