p2p

const (
	//MIN_MINERS is a lower bound of connections. If there are less, the system actively requests miner peers
	//from neighbors and establishes connections to them
	MIN_MINERS = 20
	//MAX_MINERS is an upper bound of connections. Miner handshakes are rejected if the amount of connections
	//grows above this number. Client connections are always accepted
	MAX_MINERS = 30
	//In order to get a reasonable system time, there needs to be a minimal amount of times available from other peers
	MIN_PEERS_FOR_TIME = 5
	//Interval to check system health in seconds
	HEALTH_CHECK_INTERVAL = 15
	//Broadcast local time to the network in seconds
	TIME_BRDCST_INTERVAL = 60
	//Calculate system time every UPDATE_SYS_TIME seconds
	UPDATE_SYS_TIME = 90

	//Protocol constants
	IPV4ADDR_SIZE = 4
	PORT_SIZE     = 2
)

const (
	PEERTYPE_MINER  = 1
	PEERTYPE_CLIENT = 2
)

const (
	FUNDSTX_BRDCST      = 1
	ACCTX_BRDCST        = 2
	CONFIGTX_BRDCST     = 3
	STAKETX_BRDCST      = 4
	VERIFIEDTX_BRDCST   = 5
	BLOCK_BRDCST        = 6
	BLOCK_HEADER_BRDCST = 7
	TX_BRDCST_ACK       = 8
	AGGTX_BRDCST        = 9
	DATATX_BRDCST       = 10
	AGGDATATX_BRDCST    = 11
	COMMITTEETX_BRDCST  = 12

	GENESIS_REQ            = 19
	FUNDSTX_REQ            = 20
	ACCTX_REQ              = 21
	CONFIGTX_REQ           = 22
	STAKETX_REQ            = 23
	BLOCK_REQ              = 24
	BLOCK_HEADER_REQ       = 25
	ACC_REQ                = 26
	ROOTACC_REQ            = 27
	INTERMEDIATE_NODES_REQ = 28
	AGGTX_REQ              = 29
	UNKNOWNTX_REQ          = 30
	SPECIALTX_REQ          = 31
	NOT_FOUND_TX_REQ       = 32
	AGGDATATX_REQ          = 33

	FUNDSTX_RES            = 40
	ACCTX_RES              = 41
	CONFIGTX_RES           = 42
	STAKETX_RES            = 43
	BLOCK_RES              = 44
	BlOCK_HEADER_RES       = 45
	ACC_RES                = 46
	ROOTACC_RES            = 47
	INTERMEDIATE_NODES_RES = 48
	AGGTX_RES              = 49
	AGGDATATX_RES          = 50

	NEIGHBOR_REQ = 130
	NEIGHBOR_RES = 140

	TIME_BRDCST = 150

	MINER_PING  = 100
	MINER_PONG  = 101
	CLIENT_PING = 102
	CLIENT_PONG = 103

	//Used to signal error
	NOT_FOUND = 110

	STATE_REQ = 120
	STATE_RES = 121

	FIRST_EPOCH_BLOCK_REQ   = 122
	FIRST_EPOCH_BLOCK_RES   = 123
	EPOCH_BLOCK_REQ         = 124
	EPOCH_BLOCK_RES         = 125
	VALIDATOR_SHARD_BRDCST  = 126
	VALIDATOR_SHARD_REQ     = 127
	VALIDATOR_SHARD_RES     = 128
	EPOCH_BLOCK_BRDCST      = 129
	LAST_EPOCH_BLOCK_RES    = 131
	LAST_EPOCH_BLOCK_REQ    = 132
	STATE_TRANSITION_BRDCST = 133
	STATE_TRANSITION_REQ    = 136
	STATE_TRANSITION_RES    = 137
	GENESIS_RES             = 138

	SHARD_BLOCK_REQ = 141
	SHARD_BLOCK_RES = 142

	TRANSACTION_ASSIGNMENT_REQ    = 143
	TRANSACTION_ASSIGNMENT_RES    = 144
	TRANSACTION_ASSIGNMENT_BRDCST = 145
	COMMITTEE_CHECK_BRDCST        = 146
	COMMITTEE_CHECK_REQ           = 147
	COMMITTEE_CHECK_RES           = 148
	FINETX_BRDCST                 = 149
)

const HEADER_LEN = 5