common

const (
	VERIFY_NODE  = 1 //peer involved in consensus
	SERVICE_NODE = 2 //peer only sync with consensus peer
)

const (
	PER_SEND_LEN        = 1024 * 256 //byte len per conn write
	MAX_BUF_LEN         = 1024 * 256 //the maximum buffer to receive message
	WRITE_DEADLINE      = 5          //deadline of conn write
	REQ_INTERVAL        = 3          //single request max interval in second
	MAX_REQ_RECORD_SIZE = 1000       //the maximum request record size
	MAX_RESP_CACHE_SIZE = 50         //the maximum response cache
)

const (
	MSG_CMD_LEN      = 12               //msg type length in byte
	CHECKSUM_LEN     = 4                //checksum length in byte
	MSG_HDR_LEN      = 24               //msg hdr length in byte
	MAX_BLK_HDR_CNT  = 500              //hdr count once when sync header
	MAX_INV_HDR_CNT  = 500              //inventory count once when req inv
	MAX_REQ_BLK_ONCE = 16               //req blk count once from one peer when sync blk
	MAX_MSG_LEN      = 30 * 1024 * 1024 //the maximum message length
	MAX_PAYLOAD_LEN  = MAX_MSG_LEN - MSG_HDR_LEN
)

const (
	MAX_ADDR_NODE_CNT = 64 //the maximum peer address from msg
	MAX_INV_BLK_CNT   = 64 //the maximum blk hash cnt of inv msg
)

const (
	PROTOCOL_VERSION      = 0     //protocol version
	UPDATE_RATE_PER_BLOCK = 2     //info update rate in one generate block period
	KEEPALIVE_TIMEOUT     = 15    //contact timeout in sec
	DIAL_TIMEOUT          = 6     //connect timeout in sec
	CONN_MONITOR          = 6     //time to retry connect in sec
	CONN_MAX_BACK         = 4000  //max backoff time in micro sec
	MAX_RETRY_COUNT       = 3     //max reconnect time of remote peer
	CHAN_CAPABILITY       = 10000 //channel capability of recv link

)

const (
	INIT        = 0 //initial
	HAND        = 1 //send verion to peer
	HAND_SHAKE  = 2 //haven`t send verion to peer and receive peer`s version
	HAND_SHAKED = 3 //send verion to peer and receive peer`s version
	ESTABLISH   = 4 //receive peer`s verack
	INACTIVITY  = 5 //link broken
)

const (
	RECENT_TIMEOUT   = 60
	RECENT_FILE_NAME = "peers.recent"
	RECENT_LIMIT     = 10 //recent contact list limit
)

const (
	VERSION_TYPE    = "version"   //peer`s information
	VERACK_TYPE     = "verack"    //ack msg after version recv
	GetADDR_TYPE    = "getaddr"   //req nbr address from peer
	ADDR_TYPE       = "addr"      //nbr address
	PING_TYPE       = "ping"      //ping  sync height
	PONG_TYPE       = "pong"      //pong  recv nbr height
	GET_DATA_TYPE   = "getdata"   //req data from peer
	BLOCK_TYPE      = "sig_block" //blk payload
	ID_TYPE         = "id"
	REQ_ID_TYPE     = "req_id"
	TX_TYPE         = "sig_trx"    //transaction
	NOT_FOUND_TYPE  = "notfound"   //peer can`t find blk according to the hash
	DISCONNECT_TYPE = "disconnect" //peer disconnect info raise by link
)