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
	MAX_TX_CACHE_SIZE   = 100000     //the maximum txHash cache size
)

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_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
	SYNC_BLK_WAIT         = 2     //timespan for blk sync check
)

const (
	RECENT_TIMEOUT   = 60
	RECENT_FILE_NAME = "peers.recent"
)

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_HEADERS_TYPE   = "getheaders"  //req blk hdr
	HEADERS_TYPE       = "headers"     //blk hdr
	INV_TYPE           = "inv"         //inv payload
	GET_DATA_TYPE      = "getdata"     //req data from peer
	BLOCK_TYPE         = "block"       //blk payload
	TX_TYPE            = "tx"          //transaction
	CONSENSUS_TYPE     = "consensus"   //consensus payload
	GET_BLOCKS_TYPE    = "getblocks"   //req blks from peer
	NOT_FOUND_TYPE     = "notfound"    //peer can`t find blk according to the hash
	FINDNODE_TYPE      = "findnode"    // find node using dht
	FINDNODE_RESP_TYPE = "findnodeack" // find node using dht
	UPDATE_KADID_TYPE  = "updatekadid" //update node kadid

	GET_SUBNET_MEMBERS_TYPE = "getmembers" // request subnet members
	SUBNET_MEMBERS_TYPE     = "members"    // response subnet members
	SUBNET_OFFLINE_TYPE     = "offline"    // offline witness message
)

const HTTP_INFO_FLAG = 0 //peer`s http info bit in cap field

const MIN_VERSION_FOR_DHT = "1.9.1-beta"

const (
	RecentPeerElapseLimit = 60
)