Add vote reward memo (#381)

[bytom/vapor.git] / toolbar / vote_reward / settlementvotereward / settlementreward.go

diff --git a/toolbar/vote_reward/settlementvotereward/settlementreward.go b/toolbar/vote_reward/settlementvotereward/settlementreward.go
index c367dae..a6fdbcc 100644 (file)
--- a/toolbar/vote_reward/settlementvotereward/settlementreward.go
+++ b/toolbar/vote_reward/settlementvotereward/settlementreward.go
@@ -2,6 +2,7 @@ package settlementvotereward
 
 import (
        "bytes"
+       "encoding/json"
        "math/big"
 
        "github.com/jinzhu/gorm"
@@ -14,6 +15,14 @@ import (
        "github.com/vapor/toolbar/vote_reward/config"
 )
 
+var (
+       errNotFoundReward = errors.New("No reward found")
+       errNotStandbyNode = errors.New("No Standby Node")
+       errNotRewardTx    = errors.New("No reward transaction")
+)
+
+const standbyNodesRewardForConsensusCycle = 7610350076 // 400000000000000 / (365 * 24 * 60 / (500 * 1200 / 1000 / 60))
+
 type voteResult struct {
        VoteAddress string
        VoteNum     uint64
@@ -28,6 +37,13 @@ type SettlementReward struct {
        endHeight   uint64
 }
 
+type memo struct {
+       StartHeight uint64 `json:"start_height"`
+       EndHeight   uint64 `json:"end_height"`
+       NodePubkey  string `json:"node_pubkey"`
+       RewardRatio uint64 `json:"reward_ratio"`
+}
+
 func NewSettlementReward(db *gorm.DB, cfg *config.Config, startHeight, endHeight uint64) *SettlementReward {
        return &SettlementReward{
                db:          db,
@@ -52,10 +68,17 @@ func (s *SettlementReward) getVoteResultFromDB(height uint64) (voteResults []*vo
 
 func (s *SettlementReward) Settlement() error {
        for height := s.startHeight + consensus.ActiveNetParams.RoundVoteBlockNums; height <= s.endHeight; height += consensus.ActiveNetParams.RoundVoteBlockNums {
-               coinbaseHeight := height + 1
-               totalReward, err := s.getCoinbaseReward(coinbaseHeight)
+               totalReward, err := s.getCoinbaseReward(height + 1)
+               if err == errNotFoundReward {
+                       totalReward, err = s.getStandbyNodeReward(height - consensus.ActiveNetParams.RoundVoteBlockNums)
+               }
+
+               if err == errNotStandbyNode {
+                       continue
+               }
+
                if err != nil {
-                       return errors.Wrapf(err, "get total reward at coinbase_height: %d", coinbaseHeight)
+                       return errors.Wrapf(err, "get total reward at height: %d", height)
                }
 
                voteResults, err := s.getVoteResultFromDB(height)
@@ -66,8 +89,51 @@ func (s *SettlementReward) Settlement() error {
                s.calcVoterRewards(voteResults, totalReward)
        }
 
+       if len(s.rewards) == 0 {
+               return errNotRewardTx
+       }
+
+       data, err := json.Marshal(&memo{
+               StartHeight: s.startHeight,
+               EndHeight:   s.endHeight,
+               NodePubkey:  s.rewardCfg.XPub,
+               RewardRatio: s.rewardCfg.RewardRatio,
+       })
+       if err != nil {
+               return err
+       }
+
        // send transactions
-       return s.node.BatchSendBTM(s.rewardCfg.AccountID, s.rewardCfg.Password, s.rewards)
+       _, err = s.node.BatchSendBTM(s.rewardCfg.AccountID, s.rewardCfg.Password, s.rewards, data)
+       return err
+}
+
+func (s *SettlementReward) getStandbyNodeReward(height uint64) (uint64, error) {
+       voteInfos, err := s.node.GetVoteByHeight(height)
+       if err != nil {
+               return 0, errors.Wrapf(err, "get alternative node reward")
+       }
+
+       voteInfos = common.CalcStandByNodes(voteInfos)
+
+       totalVoteNum, xpubVoteNum := uint64(0), uint64(0)
+       for _, voteInfo := range voteInfos {
+               totalVoteNum += voteInfo.VoteNum
+               if s.rewardCfg.XPub == voteInfo.Vote {
+                       xpubVoteNum = voteInfo.VoteNum
+               }
+       }
+
+       if xpubVoteNum == 0 {
+               return 0, errNotStandbyNode
+       }
+
+       amount := big.NewInt(0).SetUint64(standbyNodesRewardForConsensusCycle)
+       rewardRatio := big.NewInt(0).SetUint64(s.rewardCfg.RewardRatio)
+       amount.Mul(amount, rewardRatio).Div(amount, big.NewInt(100))
+       total := big.NewInt(0).SetUint64(totalVoteNum)
+       voteNum := big.NewInt(0).SetUint64(xpubVoteNum)
+       return amount.Mul(amount, voteNum).Div(amount, total).Uint64(), nil
 }
 
 func (s *SettlementReward) getCoinbaseReward(height uint64) (uint64, error) {
@@ -99,7 +165,7 @@ func (s *SettlementReward) getCoinbaseReward(height uint64) (uint64, error) {
                        return amount.Uint64(), nil
                }
        }
-       return 0, errors.New("No reward found")
+       return 0, errNotFoundReward
 }
 
 func (s *SettlementReward) calcVoterRewards(voteResults []*voteResult, totalReward uint64) {