nft

package
v0.14.0 Latest Latest
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 Go to latest Published: Apr 10, 2019 License: Apache-2.0 Imports: 13 Imported by: 0

Documentation

Overview

Package nft provides a core of a Non-fungible token implementation (NFT). Specialized implementations are located in submodules.

This package is a data container. Think of it as an implementation of a document store with permission (approval) control and possibility to create more than one index for each document. It does not provide a standalone implementation. This is a framework for building custom NFT implementations.

Index

Constants

View Source 
const (
	PathAddApprovalMsg    = "nft/approval/add"
	PathRemoveApprovalMsg = "nft/approval/remove"
)
View Source 
const OwnerIndexName = "owner"

OwnerIndexName is the index to query nft by owner

View Source 
const UnlimitedCount = -1
View Source 
const (
	UnsupportedTokenType = "unsupported token type"
)

Variables

View Source 
var (
	ErrInvalidLengthCodec = fmt.Errorf("proto: negative length found during unmarshaling")
	ErrIntOverflowCodec   = fmt.Errorf("proto: integer overflow")
)
View Source 
var DefaultActions = []Action{
	UpdateApprovals, UpdateDetails, Transfer,
}

DefaultActions lists all the actions that need to be registered for nft to work

Functions

func FindActor 

func FindActor(auth x.Authenticator, ctx weave.Context, t BaseNFT, action Action) weave.Address

func PrintableID added in v0.12.0 

func PrintableID(id []byte) string

id's are stored as bytes, but most are ascii text if in ascii, just convert to string if not, hex-encode it and prefix with 0x

func RegisterAction added in v0.10.1 

func RegisterAction(actions ...Action)

RegisterAction introduce an Action to the extension.

Every action must be registered before being used. This is a mandatory step so that the validation process can regcognise known actions. Registration is global. Registration should be done during the program initialization phase. Failed registration result in panic.

func WithOwnerIndex 

func WithOwnerIndex(bucket orm.Bucket) orm.Bucket

Types

type Action 

type Action string

Action represents available and supported by the implementation actions. This is just a string type alias, but using it increase the clarity of the API. 

const (
	UpdateDetails   Action = "ActionUpdateDetails"
	Transfer        Action = "ActionTransfer"
	UpdateApprovals Action = "ActionUpdateApprovals"
)

nft package provides default set of actions.

type ActionApprovals 

type ActionApprovals struct {
	Action    Action     `protobuf:"bytes,1,opt,name=action,proto3,customtype=Action" json:"action"`
	Approvals []Approval `protobuf:"bytes,2,rep,name=approvals,proto3" json:"approvals"`
}

ActionApprovals are used to control permissions and validate that a user can execute given operation.

func (ActionApprovals) Clone 

func (m ActionApprovals) Clone() ActionApprovals

func (*ActionApprovals) Descriptor 

func (*ActionApprovals) Descriptor() ([]byte, []int)

func (*ActionApprovals) GetApprovals 

func (m *ActionApprovals) GetApprovals() []Approval

func (*ActionApprovals) Marshal 

func (m *ActionApprovals) Marshal() (dAtA []byte, err error)

func (*ActionApprovals) MarshalTo 

func (m *ActionApprovals) MarshalTo(dAtA []byte) (int, error)

func (*ActionApprovals) ProtoMessage 

func (*ActionApprovals) ProtoMessage()

func (*ActionApprovals) Reset 

func (m *ActionApprovals) Reset()

func (*ActionApprovals) Size 

func (m *ActionApprovals) Size() (n int)

func (*ActionApprovals) String 

func (m *ActionApprovals) String() string

func (*ActionApprovals) Unmarshal 

func (m *ActionApprovals) Unmarshal(dAtA []byte) error

func (*ActionApprovals) XXX_DiscardUnknown added in v0.12.0 

func (m *ActionApprovals) XXX_DiscardUnknown()

func (*ActionApprovals) XXX_Marshal added in v0.12.0 

func (m *ActionApprovals) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*ActionApprovals) XXX_Merge added in v0.12.0 

func (m *ActionApprovals) XXX_Merge(src proto.Message)

func (*ActionApprovals) XXX_Size added in v0.12.0 

func (m *ActionApprovals) XXX_Size() int

func (*ActionApprovals) XXX_Unmarshal added in v0.12.0 

func (m *ActionApprovals) XXX_Unmarshal(b []byte) error

type AddApprovalMsg 

type AddApprovalMsg struct {
	ID      []byte          `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
	Address []byte          `protobuf:"bytes,2,opt,name=address,proto3" json:"address,omitempty"`
	Action  Action          `protobuf:"bytes,3,opt,name=action,proto3,customtype=Action" json:"action"`
	Options ApprovalOptions `protobuf:"bytes,4,opt,name=options,proto3" json:"options"`
	T       string          `protobuf:"bytes,5,opt,name=t,proto3" json:"t,omitempty"`
}

func (*AddApprovalMsg) Descriptor 

func (*AddApprovalMsg) Descriptor() ([]byte, []int)

func (*AddApprovalMsg) GetAddress 

func (m *AddApprovalMsg) GetAddress() []byte

func (*AddApprovalMsg) GetID added in v0.10.0 

func (m *AddApprovalMsg) GetID() []byte

func (*AddApprovalMsg) GetOptions 

func (m *AddApprovalMsg) GetOptions() ApprovalOptions

func (*AddApprovalMsg) GetT 

func (m *AddApprovalMsg) GetT() string

func (*AddApprovalMsg) Marshal 

func (m *AddApprovalMsg) Marshal() (dAtA []byte, err error)

func (*AddApprovalMsg) MarshalTo 

func (m *AddApprovalMsg) MarshalTo(dAtA []byte) (int, error)

func (*AddApprovalMsg) Path 

func (*AddApprovalMsg) Path() string

func (*AddApprovalMsg) ProtoMessage 

func (*AddApprovalMsg) ProtoMessage()

func (*AddApprovalMsg) Reset 

func (m *AddApprovalMsg) Reset()

func (*AddApprovalMsg) Size 

func (m *AddApprovalMsg) Size() (n int)

func (*AddApprovalMsg) String 

func (m *AddApprovalMsg) String() string

func (*AddApprovalMsg) Unmarshal 

func (m *AddApprovalMsg) Unmarshal(dAtA []byte) error

func (AddApprovalMsg) Validate 

func (m AddApprovalMsg) Validate() error

func (*AddApprovalMsg) XXX_DiscardUnknown added in v0.12.0 

func (m *AddApprovalMsg) XXX_DiscardUnknown()

func (*AddApprovalMsg) XXX_Marshal added in v0.12.0 

func (m *AddApprovalMsg) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*AddApprovalMsg) XXX_Merge added in v0.12.0 

func (m *AddApprovalMsg) XXX_Merge(src proto.Message)

func (*AddApprovalMsg) XXX_Size added in v0.12.0 

func (m *AddApprovalMsg) XXX_Size() int

func (*AddApprovalMsg) XXX_Unmarshal added in v0.12.0 

func (m *AddApprovalMsg) XXX_Unmarshal(b []byte) error

type Approval 

type Approval struct {
	Address []byte          `protobuf:"bytes,1,opt,name=address,proto3" json:"address,omitempty"`
	Options ApprovalOptions `protobuf:"bytes,2,opt,name=options,proto3" json:"options"`
}

func (Approval) AsAddress 

func (a Approval) AsAddress() weave.Address

func (Approval) Clone 

func (m Approval) Clone() Approval

func (*Approval) Descriptor 

func (*Approval) Descriptor() ([]byte, []int)

func (Approval) Equals 

func (a Approval) Equals(o Approval) bool

func (*Approval) GetAddress 

func (m *Approval) GetAddress() []byte

func (*Approval) GetOptions 

func (m *Approval) GetOptions() ApprovalOptions

func (*Approval) Marshal 

func (m *Approval) Marshal() (dAtA []byte, err error)

func (*Approval) MarshalTo 

func (m *Approval) MarshalTo(dAtA []byte) (int, error)

func (*Approval) ProtoMessage 

func (*Approval) ProtoMessage()

func (*Approval) Reset 

func (m *Approval) Reset()

func (*Approval) Size 

func (m *Approval) Size() (n int)

func (*Approval) String 

func (m *Approval) String() string

func (*Approval) Unmarshal 

func (m *Approval) Unmarshal(dAtA []byte) error

func (Approval) Validate 

func (m Approval) Validate() error

func (*Approval) XXX_DiscardUnknown added in v0.12.0 

func (m *Approval) XXX_DiscardUnknown()

func (*Approval) XXX_Marshal added in v0.12.0 

func (m *Approval) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*Approval) XXX_Merge added in v0.12.0 

func (m *Approval) XXX_Merge(src proto.Message)

func (*Approval) XXX_Size added in v0.12.0 

func (m *Approval) XXX_Size() int

func (*Approval) XXX_Unmarshal added in v0.12.0 

func (m *Approval) XXX_Unmarshal(b []byte) error

type ApprovalMeta 

type ApprovalMeta []Approval

func (ApprovalMeta) Clone 

func (m ApprovalMeta) Clone() ApprovalMeta

func (ApprovalMeta) Validate 

func (m ApprovalMeta) Validate() error

type ApprovalMsg 

type ApprovalMsg interface {
	GetT() string
	Identified
}

type ApprovalOps 

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

func NewApprovalOps 

func NewApprovalOps(owner weave.Address, approvals *[]ActionApprovals) *ApprovalOps

TODO: Sort errors and their codes TODO: Figure out what we need to do with counts for the next iteration

func (*ApprovalOps) Grant 

func (o *ApprovalOps) Grant(action Action, to weave.Address, op ApprovalOptions, blockHeight int64, actionMaps ...map[Action]int32) error

TODO: Figure out whether we need wildcard approvals, might be wise to add an ApprovalOptions flag

func (*ApprovalOps) List 

func (o *ApprovalOps) List() Approvals

func (*ApprovalOps) Revoke 

func (o *ApprovalOps) Revoke(action Action, from weave.Address) error

type ApprovalOptions 

type ApprovalOptions struct {
	// Until block height is used to mark blochain height until which an
	// approval is valid. This can be used to define an approval expiration.
	UntilBlockHeight int64 `protobuf:"varint,1,opt,name=until_block_height,json=untilBlockHeight,proto3" json:"until_block_height,omitempty"`
	// Count is defining how many times an approval can be used. Each approval
	// test decrese the counter. Once the counter reaches value 0, an approval
	// is considered expired and can no longer be used.
	// Use -1 to bypass count expiration.
	Count int64 `protobuf:"varint,2,opt,name=count,proto3" json:"count,omitempty"`
	// Immutable is a flag that prevents an option to be modified. Once
	// created, cannot be altered. For example, counter state cannot be
	// changed.
	Immutable bool `protobuf:"varint,3,opt,name=immutable,proto3" json:"immutable,omitempty"`
}

func (*ApprovalOptions) Descriptor 

func (*ApprovalOptions) Descriptor() ([]byte, []int)

func (ApprovalOptions) Equals 

func (a ApprovalOptions) Equals(o ApprovalOptions) bool

func (ApprovalOptions) EqualsAfterUse added in v0.9.1 

func (a ApprovalOptions) EqualsAfterUse(used ApprovalOptions) bool

func (*ApprovalOptions) GetCount 

func (m *ApprovalOptions) GetCount() int64

func (*ApprovalOptions) GetImmutable 

func (m *ApprovalOptions) GetImmutable() bool

func (*ApprovalOptions) GetUntilBlockHeight 

func (m *ApprovalOptions) GetUntilBlockHeight() int64

func (*ApprovalOptions) Marshal 

func (m *ApprovalOptions) Marshal() (dAtA []byte, err error)

func (*ApprovalOptions) MarshalTo 

func (m *ApprovalOptions) MarshalTo(dAtA []byte) (int, error)

func (*ApprovalOptions) ProtoMessage 

func (*ApprovalOptions) ProtoMessage()

func (*ApprovalOptions) Reset 

func (m *ApprovalOptions) Reset()

func (*ApprovalOptions) Size 

func (m *ApprovalOptions) Size() (n int)

func (*ApprovalOptions) String 

func (m *ApprovalOptions) String() string

func (*ApprovalOptions) Unmarshal 

func (m *ApprovalOptions) Unmarshal(dAtA []byte) error

func (ApprovalOptions) Validate 

func (a ApprovalOptions) Validate() error

func (*ApprovalOptions) XXX_DiscardUnknown added in v0.12.0 

func (m *ApprovalOptions) XXX_DiscardUnknown()

func (*ApprovalOptions) XXX_Marshal added in v0.12.0 

func (m *ApprovalOptions) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*ApprovalOptions) XXX_Merge added in v0.12.0 

func (m *ApprovalOptions) XXX_Merge(src proto.Message)

func (*ApprovalOptions) XXX_Size added in v0.12.0 

func (m *ApprovalOptions) XXX_Size() int

func (*ApprovalOptions) XXX_Unmarshal added in v0.12.0 

func (m *ApprovalOptions) XXX_Unmarshal(b []byte) error

type Approvals 

type Approvals map[Action]ApprovalMeta

func (Approvals) Add 

func (m Approvals) Add(action Action, approval Approval) Approvals

func (Approvals) AsPersistable 

func (m Approvals) AsPersistable() []ActionApprovals

func (Approvals) Filter 

func (m Approvals) Filter(obsolete Approvals) Approvals

func (Approvals) FilterExpired 

func (m Approvals) FilterExpired(blockHeight int64) Approvals

func (Approvals) ForAction 

func (m Approvals) ForAction(action Action) Approvals

func (Approvals) ForAddress 

func (m Approvals) ForAddress(addr weave.Address) Approvals

func (Approvals) Intersect added in v0.9.1 

func (m Approvals) Intersect(others Approvals) Approvals

func (Approvals) IsEmpty 

func (m Approvals) IsEmpty() bool

func (Approvals) MergeUsed added in v0.9.1 

func (m Approvals) MergeUsed(used Approvals) Approvals

func (Approvals) MetaByAction 

func (m Approvals) MetaByAction(action Action) ApprovalMeta

func (Approvals) UseCount added in v0.9.1 

func (m Approvals) UseCount() Approvals

func (Approvals) Validate 

func (m Approvals) Validate(actionMaps ...map[Action]int32) error

This requires all the model-specific actions to be passed here TODO: Not sure I'm a fan of array of maps, but it makes sense given we validate using protobuf enum value maps

type BaseNFT 

type BaseNFT interface {
	Owned
	//GetId() []byte
	Approvals() *ApprovalOps
	//Set new approvals
	SetApprovals(Approvals)
}

type Identified 

type Identified interface {
	GetID() []byte
}

TODO: Better name

type NonFungibleToken 

type NonFungibleToken struct {
	// ID is the address of this token.
	ID []byte `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
	// Owner is the address of the token owner.
	Owner []byte `protobuf:"bytes,2,opt,name=owner,proto3" json:"owner,omitempty"`
	// Action approvals is a list of permissions. In order for operation to
	// succeed, all action approvals validation must pass.
	ActionApprovals []ActionApprovals `protobuf:"bytes,3,rep,name=action_approvals,json=actionApprovals,proto3" json:"action_approvals"`
}

NonFungibleToken is a message that must be incuded by any concrete NFT implementation. Usually it is the first attirbute called `base`.

func NewNonFungibleToken 

func NewNonFungibleToken(key []byte, owner weave.Address, approvals []ActionApprovals) *NonFungibleToken

func (*NonFungibleToken) Approvals 

func (m *NonFungibleToken) Approvals() *ApprovalOps

func (*NonFungibleToken) Clone 

func (m *NonFungibleToken) Clone() *NonFungibleToken

func (*NonFungibleToken) Copy 

func (m *NonFungibleToken) Copy() orm.CloneableData

func (*NonFungibleToken) Descriptor 

func (*NonFungibleToken) Descriptor() ([]byte, []int)

func (*NonFungibleToken) GetActionApprovals 

func (m *NonFungibleToken) GetActionApprovals() []ActionApprovals

func (*NonFungibleToken) GetID added in v0.10.0 

func (m *NonFungibleToken) GetID() []byte

func (*NonFungibleToken) GetOwner 

func (m *NonFungibleToken) GetOwner() []byte

func (*NonFungibleToken) HasApproval 

func (m *NonFungibleToken) HasApproval(actor weave.Address, action Action) bool

func (*NonFungibleToken) Marshal 

func (m *NonFungibleToken) Marshal() (dAtA []byte, err error)

func (*NonFungibleToken) MarshalTo 

func (m *NonFungibleToken) MarshalTo(dAtA []byte) (int, error)

func (*NonFungibleToken) OwnerAddress 

func (u *NonFungibleToken) OwnerAddress() weave.Address

func (*NonFungibleToken) ProtoMessage 

func (*NonFungibleToken) ProtoMessage()

func (*NonFungibleToken) Reset 

func (m *NonFungibleToken) Reset()

func (*NonFungibleToken) SetApprovals added in v0.9.1 

func (m *NonFungibleToken) SetApprovals(a Approvals)

func (*NonFungibleToken) Size 

func (m *NonFungibleToken) Size() (n int)

func (*NonFungibleToken) String 

func (m *NonFungibleToken) String() string

func (*NonFungibleToken) Unmarshal 

func (m *NonFungibleToken) Unmarshal(dAtA []byte) error

func (*NonFungibleToken) Validate 

func (m *NonFungibleToken) Validate() error

func (*NonFungibleToken) XXX_DiscardUnknown added in v0.12.0 

func (m *NonFungibleToken) XXX_DiscardUnknown()

func (*NonFungibleToken) XXX_Marshal added in v0.12.0 

func (m *NonFungibleToken) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*NonFungibleToken) XXX_Merge added in v0.12.0 

func (m *NonFungibleToken) XXX_Merge(src proto.Message)

func (*NonFungibleToken) XXX_Size added in v0.12.0 

func (m *NonFungibleToken) XXX_Size() int

func (*NonFungibleToken) XXX_Unmarshal added in v0.12.0 

func (m *NonFungibleToken) XXX_Unmarshal(b []byte) error

type Owned 

type Owned interface {
	OwnerAddress() weave.Address
}

type RemoveApprovalMsg 

type RemoveApprovalMsg struct {
	ID      []byte `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
	Address []byte `protobuf:"bytes,2,opt,name=address,proto3" json:"address,omitempty"`
	Action  Action `protobuf:"bytes,3,opt,name=action,proto3,customtype=Action" json:"action"`
	T       string `protobuf:"bytes,4,opt,name=t,proto3" json:"t,omitempty"`
}

func (*RemoveApprovalMsg) Descriptor 

func (*RemoveApprovalMsg) Descriptor() ([]byte, []int)

func (*RemoveApprovalMsg) GetAddress 

func (m *RemoveApprovalMsg) GetAddress() []byte

func (*RemoveApprovalMsg) GetID added in v0.10.0 

func (m *RemoveApprovalMsg) GetID() []byte

func (*RemoveApprovalMsg) GetT 

func (m *RemoveApprovalMsg) GetT() string

func (*RemoveApprovalMsg) Marshal 

func (m *RemoveApprovalMsg) Marshal() (dAtA []byte, err error)

func (*RemoveApprovalMsg) MarshalTo 

func (m *RemoveApprovalMsg) MarshalTo(dAtA []byte) (int, error)

func (*RemoveApprovalMsg) Path 

func (*RemoveApprovalMsg) Path() string

func (*RemoveApprovalMsg) ProtoMessage 

func (*RemoveApprovalMsg) ProtoMessage()

func (*RemoveApprovalMsg) Reset 

func (m *RemoveApprovalMsg) Reset()

func (*RemoveApprovalMsg) Size 

func (m *RemoveApprovalMsg) Size() (n int)

func (*RemoveApprovalMsg) String 

func (m *RemoveApprovalMsg) String() string

func (*RemoveApprovalMsg) Unmarshal 

func (m *RemoveApprovalMsg) Unmarshal(dAtA []byte) error

func (RemoveApprovalMsg) Validate 

func (m RemoveApprovalMsg) Validate() error

func (*RemoveApprovalMsg) XXX_DiscardUnknown added in v0.12.0 

func (m *RemoveApprovalMsg) XXX_DiscardUnknown()

func (*RemoveApprovalMsg) XXX_Marshal added in v0.12.0 

func (m *RemoveApprovalMsg) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*RemoveApprovalMsg) XXX_Merge added in v0.12.0 

func (m *RemoveApprovalMsg) XXX_Merge(src proto.Message)

func (*RemoveApprovalMsg) XXX_Size added in v0.12.0 

func (m *RemoveApprovalMsg) XXX_Size() int

func (*RemoveApprovalMsg) XXX_Unmarshal added in v0.12.0 

func (m *RemoveApprovalMsg) XXX_Unmarshal(b []byte) error

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