兄弟連區塊鏈教程open-ethereum-pool礦池源碼分析payouts模組

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open-ethereum-pooleth礦池-payouts模組PayoutsProcessor定義

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 不存在時，為 key 設定指定的值    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 命令用於為雜湊表中的欄位值加上指定增量值                //HINCRBY eth:miners:login balance -amounttx.HIncrBy(r.formatKey("miners", login), "balance", (amount * -1))                //HINCRBY eth:miners:login pending amounttx.HIncrBy(r.formatKey("miners", login), "pending", amount)                //HINCRBY eth:finances balance -amounttx.HIncrBy(r.formatKey("finances"), "balance", (amount * -1))                //HINCRBY eth:finances pending amounttx.HIncrBy(r.formatKey("finances"), "pending", amount)                //ZADD eth:payments:pending ts login:amount                //Zadd 命令用於將一個或多個成員元素及其分數值加入到有序集當中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 命令用於移除有序集中的一個或多個成員        tx.ZRem(r.formatKey("payments", "pending"), join(login, amount))        //DEL 命令用於刪除已存在的鍵        //DEL eth:payments:lock        tx.Del(r.formatKey("payments", "lock"))        return nil    })    return err}

兄弟連區塊鏈教程open-ethereum-pool礦池源碼分析payouts模組