112 lines
2.5 KiB
Go
112 lines
2.5 KiB
Go
package capability
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/nspcc-dev/neo-go/pkg/io"
|
|
)
|
|
|
|
// MaxCapabilities is the maximum number of capabilities per payload.
|
|
const MaxCapabilities = 32
|
|
|
|
// Capabilities is a list of Capability.
|
|
type Capabilities []Capability
|
|
|
|
// DecodeBinary implements Serializable interface.
|
|
func (cs *Capabilities) DecodeBinary(br *io.BinReader) {
|
|
br.ReadArray(cs, MaxCapabilities)
|
|
br.Err = cs.checkUniqueCapabilities()
|
|
}
|
|
|
|
// EncodeBinary implements Serializable interface.
|
|
func (cs *Capabilities) EncodeBinary(br *io.BinWriter) {
|
|
br.WriteArray(*cs)
|
|
}
|
|
|
|
// checkUniqueCapabilities checks whether payload capabilities have unique type.
|
|
func (cs Capabilities) checkUniqueCapabilities() error {
|
|
err := errors.New("capabilities with the same type are not allowed")
|
|
var isFullNode, isTCP, isWS bool
|
|
for _, cap := range cs {
|
|
switch cap.Type {
|
|
case FullNode:
|
|
if isFullNode {
|
|
return err
|
|
}
|
|
isFullNode = true
|
|
case TCPServer:
|
|
if isTCP {
|
|
return err
|
|
}
|
|
isTCP = true
|
|
case WSServer:
|
|
if isWS {
|
|
return err
|
|
}
|
|
isWS = true
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Capability describes network service available for node.
|
|
type Capability struct {
|
|
Type Type
|
|
Data io.Serializable
|
|
}
|
|
|
|
// DecodeBinary implements Serializable interface.
|
|
func (c *Capability) DecodeBinary(br *io.BinReader) {
|
|
c.Type = Type(br.ReadB())
|
|
switch c.Type {
|
|
case FullNode:
|
|
c.Data = &Node{}
|
|
case TCPServer, WSServer:
|
|
c.Data = &Server{}
|
|
default:
|
|
br.Err = errors.New("unknown node capability type")
|
|
return
|
|
}
|
|
c.Data.DecodeBinary(br)
|
|
}
|
|
|
|
// EncodeBinary implements Serializable interface.
|
|
func (c *Capability) EncodeBinary(bw *io.BinWriter) {
|
|
if c.Data == nil {
|
|
bw.Err = errors.New("capability has no data")
|
|
return
|
|
}
|
|
bw.WriteB(byte(c.Type))
|
|
c.Data.EncodeBinary(bw)
|
|
}
|
|
|
|
// Node represents full node capability with start height.
|
|
type Node struct {
|
|
StartHeight uint32
|
|
}
|
|
|
|
// DecodeBinary implements Serializable interface.
|
|
func (n *Node) DecodeBinary(br *io.BinReader) {
|
|
n.StartHeight = br.ReadU32LE()
|
|
}
|
|
|
|
// EncodeBinary implements Serializable interface.
|
|
func (n *Node) EncodeBinary(bw *io.BinWriter) {
|
|
bw.WriteU32LE(n.StartHeight)
|
|
}
|
|
|
|
// Server represents TCP or WS server capability with port.
|
|
type Server struct {
|
|
// Port is the port this server is listening on.
|
|
Port uint16
|
|
}
|
|
|
|
// DecodeBinary implements Serializable interface.
|
|
func (s *Server) DecodeBinary(br *io.BinReader) {
|
|
s.Port = br.ReadU16LE()
|
|
}
|
|
|
|
// EncodeBinary implements Serializable interface.
|
|
func (s *Server) EncodeBinary(bw *io.BinWriter) {
|
|
bw.WriteU16LE(s.Port)
|
|
}
|