blockchain

Documentation

Overview

Package blockchain contains the "Blockchain" struct that holds all mined blocks. It is also responsible for the "Block" struct and all methods that are related with hashing, validating etc.

Index

• func AddBlock(b t.Block) error
• func HashBlockValues(timestamp int64, lastHash string, txs []t.Transaction, difficulty uint64, ...) (string, error)
• func LastBlock() (t.Block, error)
• func NewGenesisBlock() t.Block
• func VerifyBlockHash(b t.Block) (bool, error)
• type State
  • func GetState() (State, error)
  • func New() State
  • func (s *State) IsValidChain() bool
  • func (s State) String() string

Functions

func AddBlock

func AddBlock(b t.Block) error

AddBlock adds a "Block" to the given blockchain state.

func HashBlockValues

func HashBlockValues(timestamp int64, lastHash string, txs []t.Transaction, difficulty uint64, nonce int) (string, error)

HashBlockValues takes values of a Block, plus a nonce, and receives the derived hash string.

func LastBlock

func LastBlock() (t.Block, error)

LastBlock returns the last Block of the current chain

func NewGenesisBlock

func NewGenesisBlock() t.Block

NewGenesisBlock returns a "Block" that contains static data. Can be used to initialize a new chain.

func VerifyBlockHash

func VerifyBlockHash(b t.Block) (bool, error)

VerifyBlockHash returns "true" if the hash inside the "Block" is a valid hash of itself.

Types

type State

type State struct {
	Blocks []t.Block `json:"blocks"`
}

State contains the general blockchain state, most importantly all mined blocks.

func GetState

func GetState() (State, error)

GetState returns the current state of the blockchain with all their blocks.

func New

func New() State

New returns a "State" struct with the genesis block as the first and only value in it's "Blocks" slice.

func (*State) IsValidChain

func (s *State) IsValidChain() bool

IsValidChain validates if all blocks contain valid hashes and are chained properly through their "lastHash".

func (State) String

func (s State) String() string