open-ethereum-pooleth矿池-payouts模块

PayoutsProcessor定义

type PayoutsProcessor struct {
config *PayoutsConfig
backend *storage.RedisClient
rpc *rpc.RPCClient
halt bool
lastFail error
}

GetPendingPayments原理

func (r *RedisClient) GetPendingPayments() []*PendingPayment {
//ZREVRANGE eth:payments:pending 0 -1 WITHSCORES
raw := r.client.ZRevRangeWithScores(r.formatKey("payments", "pending"), 0, -1)
var result []*PendingPayment
for _, v := range raw.Val() {
// timestamp -> "address:amount"
payment := PendingPayment{}
payment.Timestamp = int64(v.Score)
fields := strings.Split(v.Member.(string), ":")
payment.Address = fields[0]
payment.Amount, _ = strconv.ParseInt(fields[1], 10, 64)
result = append(result, &payment)
}
return result
}

GetPayees原理

func (r *RedisClient) GetPayees() ([]string, error) {
payees := make(map[string]struct{})
var result []string
var c int64

for {
var keys []string
var err error
c, keys, err = r.client.Scan(c, r.formatKey("miners", "*"), 100).Result()
if err != nil {
return nil, err
}
for _, row := range keys {
login := strings.Split(row, ":")[2]
payees[login] = struct{}{}
}
if c == 0 {
break
}
}
for login, _ := range payees {
result = append(result, login)
}
return result, nil
}

LockPayouts原理

func (r *RedisClient) LockPayouts(login string, amount int64) error {
//eth:payments:lock
key := r.formatKey("payments", "lock")

//SETNX eth:payments:lock login:amount 0
//Setnx（SET if Not eXists） 命令在指定的 key 不存在时，为 key 设置指定的值
result := r.client.SetNX(key, join(login, amount), 0).Val()
if !result {
return fmt.Errorf("Unable to acquire lock '%s'", key)
}
return nil
}

UpdateBalance原理

func (r *RedisClient) UpdateBalance(login string, amount int64) error {
tx := r.client.Multi()
defer tx.Close()

ts := util.MakeTimestamp() / 1000

_, err := tx.Exec(func() error {
//Hincrby 命令用于为哈希表中的字段值加上指定增量值
//HINCRBY eth:miners:login balance -amount
tx.HIncrBy(r.formatKey("miners", login), "balance", (amount * -1))

//HINCRBY eth:miners:login pending amount
tx.HIncrBy(r.formatKey("miners", login), "pending", amount)

//HINCRBY eth:finances balance -amount
tx.HIncrBy(r.formatKey("finances"), "balance", (amount * -1))

//HINCRBY eth:finances pending amount
tx.HIncrBy(r.formatKey("finances"), "pending", amount)

//ZADD eth:payments:pending ts login:amount
//Zadd 命令用于将一个或多个成员元素及其分数值加入到有序集当中
tx.ZAdd(r.formatKey("payments", "pending"), redis.Z{Score: float64(ts), Member: join(login, amount)})
return nil
})
return err
}

RollbackBalance原理

func (r *RedisClient) RollbackBalance(login string, amount int64) error {
tx := r.client.Multi()
defer tx.Close()

_, err := tx.Exec(func() error {
tx.HIncrBy(r.formatKey("miners", login), "balance", amount)
tx.HIncrBy(r.formatKey("miners", login), "pending", (amount * -1))
tx.HIncrBy(r.formatKey("finances"), "balance", amount)
tx.HIncrBy(r.formatKey("finances"), "pending", (amount * -1))
tx.ZRem(r.formatKey("payments", "pending"), join(login, amount))
return nil
})
return err
}

WritePayment原理

func (r *RedisClient) WritePayment(login, txHash string, amount int64) error {
tx := r.client.Multi()
defer tx.Close()

ts := util.MakeTimestamp() / 1000

_, err := tx.Exec(func() error {
//HINCRBY eth:miners:login pending -amount
tx.HIncrBy(r.formatKey("miners", login), "pending", (amount * -1))

//HINCRBY eth:miners:login paid amount
tx.HIncrBy(r.formatKey("miners", login), "paid", amount)

//HINCRBY eth:finances pending -amount
tx.HIncrBy(r.formatKey("finances"), "pending", (amount * -1))

//HINCRBY eth:finances paid amount
tx.HIncrBy(r.formatKey("finances"), "paid", amount)

//ZADD eth:payments:all ts txHash:login:amount
tx.ZAdd(r.formatKey("payments", "all"), redis.Z{Score: float64(ts), Member: join(txHash, login, amount)})

//ZADD eth:payments:login ts txHash:amount
tx.ZAdd(r.formatKey("payments", login), redis.Z{Score: float64(ts), Member: join(txHash, amount)})

//ZREM eth:payments:pending login:amount
//Zrem 命令 Redis 有序集合(sorted set) Redis Zrem 命令用于移除有序集中的一个或多个成员
tx.ZRem(r.formatKey("payments", "pending"), join(login, amount))

//DEL 命令用于删除已存在的键
//DEL eth:payments:lock
tx.Del(r.formatKey("payments", "lock"))
return nil
})
return err
}