djtx

package
v1.0.0 Latest Latest
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 Go to latest Published: Jun 19, 2022 License: BSD-3-Clause Imports: 24 Imported by: 8

Documentation

Index

Constants

View Source 
const (
	IsInitializedKey byte = iota
)
View Source 
const MaxMemoSize = 256

MaxMemoSize is the maximum number of bytes in the memo field

Variables

This section is empty.

Functions

func GetBalance 

func GetBalance(db UTXOReader, addrs ids.ShortSet) (uint64, error)

GetBalance returns the current balance of [addrs]

func IsSortedAndUniqueTransferableInputs 

func IsSortedAndUniqueTransferableInputs(ins []*TransferableInput) bool

func IsSortedAndUniqueTransferableInputsWithSigners 

func IsSortedAndUniqueTransferableInputsWithSigners(ins []*TransferableInput, signers [][]*crypto.PrivateKeySECP256K1R) bool

IsSortedAndUniqueTransferableInputsWithSigners returns true if the inputs are sorted and unique

func IsSortedAndUniqueUTXOIDs 

func IsSortedAndUniqueUTXOIDs(utxos []*UTXOID) bool

func IsSortedTransferableOutputs 

func IsSortedTransferableOutputs(outs []*TransferableOutput, c codec.Manager) bool

IsSortedTransferableOutputs returns true if output objects are sorted

func ParseLocalAddresses 

func ParseLocalAddresses(a AddressManager, addrStrs []string) (ids.ShortSet, error)

func SortTransferableInputs 

func SortTransferableInputs(ins []*TransferableInput)

func SortTransferableInputsWithSigners 

func SortTransferableInputsWithSigners(ins []*TransferableInput, signers [][]*crypto.PrivateKeySECP256K1R)

SortTransferableInputsWithSigners sorts the inputs and signers based on the input's utxo ID

func SortTransferableOutputs 

func SortTransferableOutputs(outs []*TransferableOutput, c codec.Manager)

SortTransferableOutputs sorts output objects

func SortUTXOIDs 

func SortUTXOIDs(utxos []*UTXOID)

func VerifyTx 

func VerifyTx(
	feeAmount uint64,
	feeAssetID ids.ID,
	allIns [][]*TransferableInput,
	allOuts [][]*TransferableOutput,
	c codec.Manager,
) error

VerifyTx verifies that the inputs and outputs flowcheck, including a fee. Additionally, this verifies that the inputs and outputs are sorted.

Types

type AddressManager 

type AddressManager interface {
	// ParseLocalAddress takes in an address for this chain and produces the ID
	ParseLocalAddress(addrStr string) (ids.ShortID, error)

	// ParseAddress takes in an address and produces the ID of the chain it's
	// for and the ID of the address
	ParseAddress(addrStr string) (ids.ID, ids.ShortID, error)

	// FormatLocalAddress takes in a raw address and produces the formatted
	// address for this chain
	FormatLocalAddress(addr ids.ShortID) (string, error)

	// FormatAddress takes in a chainID and a raw address and produces the
	// formatted address for that chain
	FormatAddress(chainID ids.ID, addr ids.ShortID) (string, error)
}

func NewAddressManager 

func NewAddressManager(ctx *snow.Context) AddressManager

type Addressable 

type Addressable interface {
	Addresses() [][]byte
}

Addressable is the interface a feature extension must provide to be able to be tracked as a part of the utxo set for a set of addresses

type Amounter 

type Amounter interface {
	snow.ContextInitializable
	// Amount returns how much value this element represents of the asset in its
	// transaction.
	Amount() uint64
}

Amounter is a data structure that has an amount of something associated with it

type Asset 

type Asset struct {
	ID ids.ID `serialize:"true" json:"assetID"`
}

func (*Asset) AssetID 

func (asset *Asset) AssetID() ids.ID

AssetID returns the ID of the contained asset

func (*Asset) Verify 

func (asset *Asset) Verify() error

type AtomicUTXOManager 

type AtomicUTXOManager interface {
	// GetAtomicUTXOs returns exported UTXOs such that at least one of the
	// addresses in [addrs] is referenced.
	//
	// Returns at most [limit] UTXOs.
	//
	// Returns:
	// * The fetched UTXOs
	// * The address associated with the last UTXO fetched
	// * The ID of the last UTXO fetched
	// * Any error that may have occurred upstream.
	GetAtomicUTXOs(
		chainID ids.ID,
		addrs ids.ShortSet,
		startAddr ids.ShortID,
		startUTXOID ids.ID,
		limit int,
	) ([]*UTXO, ids.ShortID, ids.ID, error)
}

func NewAtomicUTXOManager 

func NewAtomicUTXOManager(sm atomic.SharedMemory, codec codec.Manager) AtomicUTXOManager

type BaseTx 

type BaseTx struct {
	Metadata

	NetworkID    uint32                `serialize:"true" json:"networkID"`    // ID of the network this chain lives on
	BlockchainID ids.ID                `serialize:"true" json:"blockchainID"` // ID of the chain on which this transaction exists (prevents replay attacks)
	Outs         []*TransferableOutput `serialize:"true" json:"outputs"`      // The outputs of this transaction
	Ins          []*TransferableInput  `serialize:"true" json:"inputs"`       // The inputs to this transaction
	Memo         types.JSONByteSlice   `serialize:"true" json:"memo"`         // Memo field contains arbitrary bytes, up to maxMemoSize
}

BaseTx is the basis of all standard transactions.

func (*BaseTx) AssetIDs 

func (t *BaseTx) AssetIDs() ids.Set

AssetIDs returns the IDs of the assets this transaction depends on

func (*BaseTx) ConsumedAssetIDs 

func (t *BaseTx) ConsumedAssetIDs() ids.Set

ConsumedAssetIDs returns the IDs of the assets this transaction consumes

func (*BaseTx) InputUTXOs 

func (t *BaseTx) InputUTXOs() []*UTXOID

InputUTXOs track which UTXOs this transaction is consuming.

func (*BaseTx) MetadataVerify 

func (t *BaseTx) MetadataVerify(ctx *snow.Context) error

MetadataVerify ensures that transaction metadata is valid

func (*BaseTx) NumCredentials 

func (t *BaseTx) NumCredentials() int

NumCredentials returns the number of expected credentials

func (*BaseTx) UTXOs 

func (t *BaseTx) UTXOs() []*UTXO

UTXOs returns the UTXOs transaction is producing.

type Coster 

type Coster interface {
	// Cost returns how much this element costs to be included in its
	// transaction.
	Cost() (uint64, error)
}

Coster is a data structure that has a cost associated with it

type FlowChecker 

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

func NewFlowChecker 

func NewFlowChecker() *FlowChecker

func (*FlowChecker) Consume 

func (fc *FlowChecker) Consume(assetID ids.ID, amount uint64)

func (*FlowChecker) Produce 

func (fc *FlowChecker) Produce(assetID ids.ID, amount uint64)

func (*FlowChecker) Verify 

func (fc *FlowChecker) Verify() error

type Metadata 

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

func (*Metadata) Bytes 

func (md *Metadata) Bytes() []byte

Bytes returns the binary representation of this data

func (*Metadata) ID 

func (md *Metadata) ID() ids.ID

ID returns the unique ID of this data

func (*Metadata) Initialize 

func (md *Metadata) Initialize(unsignedBytes, bytes []byte)

Initialize set the bytes and ID

func (*Metadata) UnsignedBytes 

func (md *Metadata) UnsignedBytes() []byte

UnsignedBytes returns the unsigned binary representation of this data

func (*Metadata) Verify 

func (md *Metadata) Verify() error

type SingletonState 

type SingletonState interface {
	IsInitialized() (bool, error)
	SetInitialized() error
}

SingletonState is a thin wrapper around a database to provide, caching, serialization, and de-serialization of singletons.

func NewSingletonState 

func NewSingletonState(db database.Database) SingletonState

type StatusState 

type StatusState interface {
	// Status returns a status from storage.
	GetStatus(id ids.ID) (choices.Status, error)

	// PutStatus saves a status in storage.
	PutStatus(id ids.ID, status choices.Status) error

	// DeleteStatus removes a status from storage.
	DeleteStatus(id ids.ID) error
}

StatusState is a thin wrapper around a database to provide, caching, serialization, and de-serialization for statuses.

func NewMeteredStatusState 

func NewMeteredStatusState(db database.Database, metrics prometheus.Registerer) (StatusState, error)

func NewStatusState 

func NewStatusState(db database.Database) StatusState

type TestAddressable 

type TestAddressable struct {
	TestTransferable `serialize:"true"`

	Addrs [][]byte `serialize:"true"`
}

func (*TestAddressable) Addresses 

func (a *TestAddressable) Addresses() [][]byte

type TestTransferable 

type TestTransferable struct {
	TestVerifiable

	Val uint64 `serialize:"true"`
}

func (*TestTransferable) Amount 

func (t *TestTransferable) Amount() uint64

func (*TestTransferable) Cost 

func (t *TestTransferable) Cost() (uint64, error)

func (*TestTransferable) InitCtx 

func (t *TestTransferable) InitCtx(*snow.Context)

type TestVerifiable 

type TestVerifiable struct{ Err error }

func (*TestVerifiable) InitCtx 

func (v *TestVerifiable) InitCtx(ctx *snow.Context)

func (*TestVerifiable) Verify 

func (v *TestVerifiable) Verify() error

func (*TestVerifiable) VerifyState 

func (v *TestVerifiable) VerifyState() error

type TransferableIn 

type TransferableIn interface {
	verify.Verifiable
	Amounter
	Coster
}

TransferableIn is the interface a feature extension must provide to transfer value between features extensions.

type TransferableInput 

type TransferableInput struct {
	UTXOID `serialize:"true"`
	Asset  `serialize:"true"`
	// FxID has serialize false because we don't want this to be encoded in bytes
	FxID ids.ID         `serialize:"false" json:"fxID"`
	In   TransferableIn `serialize:"true" json:"input"`
}

func (*TransferableInput) Input 

func (in *TransferableInput) Input() TransferableIn

Input returns the feature extension input that this Input is using.

func (*TransferableInput) Verify 

func (in *TransferableInput) Verify() error

type TransferableOut 

type TransferableOut interface {
	snow.ContextInitializable
	verify.State
	Amounter
}

TransferableOut is the interface a feature extension must provide to transfer value between features extensions.

type TransferableOutput 

type TransferableOutput struct {
	Asset `serialize:"true"`
	// FxID has serialize false because we don't want this to be encoded in bytes
	FxID ids.ID          `serialize:"false" json:"fxID"`
	Out  TransferableOut `serialize:"true" json:"output"`
}

func (*TransferableOutput) InitCtx 

func (out *TransferableOutput) InitCtx(ctx *snow.Context)

func (*TransferableOutput) Output 

func (out *TransferableOutput) Output() TransferableOut

Output returns the feature extension output that this Output is using.

func (*TransferableOutput) Verify 

func (out *TransferableOutput) Verify() error

type UTXO 

type UTXO struct {
	UTXOID `serialize:"true"`
	Asset  `serialize:"true"`

	Out verify.State `serialize:"true" json:"output"`
}

func GetAllUTXOs 

func GetAllUTXOs(db UTXOReader, addrs ids.ShortSet) ([]*UTXO, error)

func GetPaginatedUTXOs 

func GetPaginatedUTXOs(
	db UTXOReader,
	addrs ids.ShortSet,
	lastAddr ids.ShortID,
	lastUTXOID ids.ID,
	limit int,
) ([]*UTXO, ids.ShortID, ids.ID, error)

GetPaginatedUTXOs returns UTXOs such that at least one of the addresses in [addrs] is referenced.

Returns at most [limit] UTXOs.

Only returns UTXOs associated with addresses >= [startAddr].

For address [startAddr], only returns UTXOs whose IDs are greater than [startUTXOID].

Returns: * The fetched UTXOs * The address associated with the last UTXO fetched * The ID of the last UTXO fetched

func (*UTXO) Verify 

func (utxo *UTXO) Verify() error

type UTXOGetter 

type UTXOGetter interface {
	// GetUTXO attempts to load a utxo.
	GetUTXO(utxoID ids.ID) (*UTXO, error)
}

UTXOGetter is a thin wrapper around a database to provide fetching of a UTXO.

type UTXOID 

type UTXOID struct {
	// Serialized:
	TxID        ids.ID `serialize:"true" json:"txID"`
	OutputIndex uint32 `serialize:"true" json:"outputIndex"`

	// Symbol is false if the UTXO should be part of the DB
	Symbol bool `json:"-"`
	// contains filtered or unexported fields
}

func (*UTXOID) InputID 

func (utxo *UTXOID) InputID() ids.ID

InputID returns a unique ID of the UTXO that this input is spending

func (*UTXOID) InputSource 

func (utxo *UTXOID) InputSource() (ids.ID, uint32)

InputSource returns the source of the UTXO that this input is spending

func (*UTXOID) String 

func (utxo *UTXOID) String() string

func (*UTXOID) Symbolic 

func (utxo *UTXOID) Symbolic() bool

Symbolic returns if this is the ID of a UTXO in the DB, or if it is a symbolic input

func (*UTXOID) Verify 

func (utxo *UTXOID) Verify() error

type UTXOReader 

type UTXOReader interface {
	UTXOGetter

	// UTXOIDs returns the slice of IDs associated with [addr], starting after
	// [previous].
	// If [previous] is not in the list, starts at beginning.
	// Returns at most [limit] IDs.
	UTXOIDs(addr []byte, previous ids.ID, limit int) ([]ids.ID, error)
}

UTXOReader is a thin wrapper around a database to provide fetching of UTXOs.

type UTXOState 

type UTXOState interface {
	UTXOReader
	UTXOWriter
}

UTXOState is a thin wrapper around a database to provide, caching, serialization, and de-serialization for UTXOs.

func NewMeteredUTXOState 

func NewMeteredUTXOState(db database.Database, codec codec.Manager, metrics prometheus.Registerer) (UTXOState, error)

func NewUTXOState 

func NewUTXOState(db database.Database, codec codec.Manager) UTXOState

type UTXOWriter 

type UTXOWriter interface {
	// PutUTXO saves the provided utxo to storage.
	PutUTXO(utxoID ids.ID, utxo *UTXO) error

	// DeleteUTXO deletes the provided utxo.
	DeleteUTXO(utxoID ids.ID) error
}

UTXOWriter is a thin wrapper around a database to provide storage and deletion of UTXOs.

Source Files

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