host

type Bitmask big.Int

type NodeID [20]byte

type VMBlock interface {
	// Digest returns a succinct representation of this block.
	Digest() [32]byte

	// Height returns the height of this block in the chain.
	Height() uint64

	// Time this block was proposed at. This value should be consistent across
	// all nodes. If this block hasn't been successfully verified, any value can
	// be returned. If this block is the last accepted block, the timestamp must
	// be returned correctly. Otherwise, accepted blocks can return any value.
	Timestamp() time.Time

	// Verify that the state transition this block would make if accepted is
	// valid. If the state transition is invalid, a non-nil error should be
	// returned.
	//
	// It is guaranteed that the Parent has been successfully verified.
	//
	// If nil is returned, it is guaranteed that either Accept or Reject will be
	// called on this block, unless the VM is shut down.
	Verify(ctx context.Context, pChainHeight uint64) error

	// Bytes returns the byte representation of this block.
	Bytes() []byte
}