state

type Actor interface {
	Code() cid.Cid
	Head() cid.Cid
	Nonce() uint64
	Balance() types.BigInt
}

type PaymentChannelActorState interface {
	From() address.Address
	To() address.Address
	ToSend() types.BigInt
	ClosingAt() uint64
	MinCloseHeight() uint64
}

type Signer interface {
	Sign(ctx context.Context, addr address.Address, data []byte) (*types.Signature, error)
}

type Storage interface {
	Get(c cid.Cid, out interface{}) error
}

type Wrapper interface {
	// Returns the CID of the root node of the state tree.
	Cid() cid.Cid

	// Returns the actor state at `address` (or an error if there is none).
	Actor(address address.Address) (Actor, error)

	// Returns the actor storage for the actor at `address` (which is empty if there is no such actor).
	Storage(address address.Address) (Storage, error)

	// Creates a new private key and returns the associated address.
	NewAccountAddress() (address.Address, error)

	// Sign data with addr's key.
	Sign(ctx context.Context, addr address.Address, data []byte) (*types.Signature, error)

	// Installs a new actor in the state tree.
	// This signature will probably become a little more complex when the actor state is non-empty.
	SetActor(address address.Address, code actors.ActorCodeID, balance types.BigInt) (Actor, Storage, error)

	// Installs a new singleton actor in the state tree.
	SetSingletonActor(address actors.SingletonActorID, balance types.BigInt) (Actor, Storage, error)
}