timestampvm

package
v1.3.1 Latest Latest
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 Go to latest Published: Jul 4, 2023 License: BSD-3-Clause Imports: 25 Imported by: 0

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Index

Constants

View Source 
const (
	// CodecVersion is the current default codec version
	CodecVersion = 0
)
View Source 
const (
	Name = "timestampvm"
)

Variables

View Source 
var (
	Codec codec.Manager
)

Codecs do serialization and deserialization

View Source 
var (
	Version = version.NewDefaultVersion(1, 2, 0)
)

Functions

This section is empty.

Types

type Block 

type Block struct {
	PrntID ids.ID        `serialize:"true" json:"parentID"`  // parent's ID
	Hght   uint64        `serialize:"true" json:"height"`    // This block's height. The genesis block is at height 0.
	Tmstmp int64         `serialize:"true" json:"timestamp"` // Time this block was proposed at
	Dt     [dataLen]byte `serialize:"true" json:"data"`      // Arbitrary data
	// contains filtered or unexported fields
}

Block is a block on the chain. Each block contains: 1) ParentID 2) Height 3) Timestamp 4) A piece of data (a string)

func (*Block) Accept 

func (b *Block) Accept() error

Accept sets this block's status to Accepted and sets lastAccepted to this block's ID and saves this info to b.vm.DB

func (*Block) Bytes 

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

Bytes returns the byte repr. of this block

func (*Block) Data 

func (b *Block) Data() [dataLen]byte

Data returns the data of this block

func (*Block) Height 

func (b *Block) Height() uint64

Height returns this block's height. The genesis block has height 0.

func (*Block) ID 

func (b *Block) ID() ids.ID

ID returns the ID of this block

func (*Block) Initialize 

func (b *Block) Initialize(bytes []byte, status choices.Status, vm *VM)

Initialize sets [b.bytes] to bytes, [b.id] to hash([b.bytes]), [b.status] to [status] and [b.vm] to [vm]

func (*Block) Parent 

func (b *Block) Parent() ids.ID

ParentID returns [b]'s parent's ID

func (*Block) Reject 

func (b *Block) Reject() error

Reject sets this block's status to Rejected and saves the status in state Recall that b.vm.DB.Commit() must be called to persist to the DB

func (*Block) SetStatus 

func (b *Block) SetStatus(status choices.Status)

SetStatus sets the status of this block

func (*Block) Status 

func (b *Block) Status() choices.Status

Status returns the status of this block

func (*Block) Timestamp 

func (b *Block) Timestamp() time.Time

Timestamp returns this block's time. The genesis block has time 0.

func (*Block) Verify 

func (b *Block) Verify() error

Verify returns nil iff this block is valid. To be valid, it must be that: b.parent.Timestamp < b.Timestamp <= [local time] + 1 hour

type BlockState 

type BlockState interface {
	GetBlock(blkID ids.ID) (*Block, error)
	PutBlock(blk *Block) error

	GetLastAccepted() (ids.ID, error)
	SetLastAccepted(ids.ID) error
}

BlockState defines methods to manage state with Blocks and LastAcceptedIDs.

func NewBlockState 

func NewBlockState(db database.Database, vm *VM) BlockState

NewBlockState returns BlockState with a new cache and given db

type DecodeArgs 

type DecodeArgs struct {
	Bytes    string              `json:"bytes"`
	Encoding formatting.Encoding `json:"encoding"`
}

DecodeArgs are arguments for Decode

type DecodeReply 

type DecodeReply struct {
	Data     string              `json:"data"`
	Encoding formatting.Encoding `json:"encoding"`
}

DecodeReply is the reply from Decode

type EncodeArgs 

type EncodeArgs struct {
	Data     string              `json:"data"`
	Encoding formatting.Encoding `json:"encoding"`
	Length   int32               `json:"length"`
}

EncodeArgs are arguments for Encode

type EncodeReply 

type EncodeReply struct {
	Bytes    string              `json:"bytes"`
	Encoding formatting.Encoding `json:"encoding"`
}

EncodeReply is the reply from Encode

type Factory 

type Factory struct{}

Factory ...

func (*Factory) New 

func (f *Factory) New(*snow.Context) (interface{}, error)

New ...

type GetBlockArgs 

type GetBlockArgs struct {
	// ID of the block we're getting.
	// If left blank, gets the latest block
	ID *ids.ID `json:"id"`
}

GetBlockArgs are the arguments to GetBlock

type GetBlockReply 

type GetBlockReply struct {
	Timestamp json.Uint64 `json:"timestamp"` // Timestamp of most recent block
	Data      string      `json:"data"`      // Data in the most recent block. Base 58 repr. of 5 bytes.
	ID        ids.ID      `json:"id"`        // String repr. of ID of the most recent block
	ParentID  ids.ID      `json:"parentID"`  // String repr. of ID of the most recent block's parent
}

GetBlockReply is the reply from GetBlock

type ProposeBlockArgs 

type ProposeBlockArgs struct {
	// Data in the block. Must be base 58 encoding of 32 bytes.
	Data string `json:"data"`
}

ProposeBlockArgs are the arguments to function ProposeValue

type ProposeBlockReply 

type ProposeBlockReply struct{ Success bool }

ProposeBlockReply is the reply from function ProposeBlock

type Service 

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

Service is the API service for this VM

func (*Service) GetBlock 

func (s *Service) GetBlock(_ *http.Request, args *GetBlockArgs, reply *GetBlockReply) error

GetBlock gets the block whose ID is [args.ID] If [args.ID] is empty, get the latest block

func (*Service) ProposeBlock 

func (s *Service) ProposeBlock(_ *http.Request, args *ProposeBlockArgs, reply *ProposeBlockReply) error

ProposeBlock is an API method to propose a new block whose data is [args].Data. [args].Data must be a string repr. of a 32 byte array

type State 

type State interface {
	// SingletonState is defined in avalanchego,
	// it is used to understand if db is initialized already.
	djtx.SingletonState
	BlockState

	Commit() error
	Close() error
}

State is a wrapper around djtx.SingleTonState and BlockState State also exposes a few methods needed for managing database commits and close.

func NewState 

func NewState(db database.Database, vm *VM) State

type StaticService 

type StaticService struct{}

StaticService defines the base service for the timestamp vm

func CreateStaticService 

func CreateStaticService() *StaticService

CreateStaticService ...

func (*StaticService) Decode 

func (ss *StaticService) Decode(_ *http.Request, args *DecodeArgs, reply *DecodeReply) error

Decode returns the Decoded data

func (*StaticService) Encode 

func (ss *StaticService) Encode(_ *http.Request, args *EncodeArgs, reply *EncodeReply) error

Encode returns the encoded data

type VM 

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

VM implements the snowman.VM interface Each block in this chain contains a Unix timestamp and a piece of data (a string)

func (*VM) AppGossip 

func (vm *VM) AppGossip(nodeID ids.ShortID, msg []byte) error

This VM doesn't (currently) have any app-specific messages

func (*VM) AppRequest 

func (vm *VM) AppRequest(nodeID ids.ShortID, requestID uint32, time time.Time, request []byte) error

This VM doesn't (currently) have any app-specific messages

func (*VM) AppRequestFailed 

func (vm *VM) AppRequestFailed(nodeID ids.ShortID, requestID uint32) error

This VM doesn't (currently) have any app-specific messages

func (*VM) AppResponse 

func (vm *VM) AppResponse(nodeID ids.ShortID, requestID uint32, response []byte) error

This VM doesn't (currently) have any app-specific messages

func (*VM) Bootstrapped 

func (vm *VM) Bootstrapped() error

Bootstrapped marks this VM as bootstrapped

func (*VM) Bootstrapping 

func (vm *VM) Bootstrapping() error

Bootstrapping marks this VM as bootstrapping

func (*VM) BuildBlock 

func (vm *VM) BuildBlock() (snowman.Block, error)

BuildBlock returns a block that this vm wants to add to consensus

func (*VM) Connected 

func (vm *VM) Connected(id ids.ShortID) error

func (*VM) CreateHandlers 

func (vm *VM) CreateHandlers() (map[string]*common.HTTPHandler, error)

CreateHandlers returns a map where: Keys: The path extension for this VM's API (empty in this case) Values: The handler for the API

func (*VM) CreateStaticHandlers 

func (vm *VM) CreateStaticHandlers() (map[string]*common.HTTPHandler, error)

CreateStaticHandlers returns a map where: Keys: The path extension for this VM's static API Values: The handler for that static API

func (*VM) Disconnected 

func (vm *VM) Disconnected(id ids.ShortID) error

func (*VM) GetBlock 

func (vm *VM) GetBlock(blkID ids.ID) (snowman.Block, error)

GetBlock implements the snowman.ChainVM interface

func (*VM) HealthCheck 

func (vm *VM) HealthCheck() (interface{}, error)

Health implements the common.VM interface

func (*VM) Initialize 

func (vm *VM) Initialize(
	ctx *snow.Context,
	dbManager manager.Manager,
	genesisData []byte,
	upgradeData []byte,
	configData []byte,
	toEngine chan<- common.Message,
	_ []*common.Fx,
	_ common.AppSender,
) error

Initialize this vm [ctx] is this vm's context [dbManager] is the manager of this vm's database [toEngine] is used to notify the consensus engine that new blocks are 

ready to be added to consensus

The data in the genesis block is [genesisData]

func (*VM) LastAccepted 

func (vm *VM) LastAccepted() (ids.ID, error)

LastAccepted returns the block most recently accepted

func (*VM) NewBlock 

func (vm *VM) NewBlock(parentID ids.ID, height uint64, data [dataLen]byte, timestamp time.Time) (*Block, error)

NewBlock returns a new Block where: - the block's parent is [parentID] - the block's data is [data] - the block's timestamp is [timestamp]

func (*VM) NotifyBlockReady 

func (vm *VM) NotifyBlockReady()

NotifyBlockReady tells the consensus engine that a new block is ready to be created

func (*VM) ParseBlock 

func (vm *VM) ParseBlock(bytes []byte) (snowman.Block, error)

ParseBlock parses bytes to a snowman.Block This function is used by the vm's state to unmarshal blocks saved in state and by the consensus layer when it receives the byte representation of a block from another node

func (*VM) SetPreference 

func (vm *VM) SetPreference(id ids.ID) error

SetPreference sets the block with ID [ID] as the preferred block

func (*VM) Shutdown 

func (vm *VM) Shutdown() error

Shutdown this vm

func (*VM) Version 

func (vm *VM) Version() (string, error)

Returns this VM's version

Source Files

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