Golang Block.CheckMinerPayouts方法代碼示例

// validHeader does some early, low computation verification on the block.
func (cs *State) validHeader(b types.Block) error {
	// Grab the parent of the block and verify the ID of the child meets the
	// target. This is done as early as possible to enforce that any
	// block-related DoS must use blocks that have sufficient work.
	parent, exists := cs.blockMap[b.ParentID]
	if !exists {
		return ErrOrphan
	}
	if !b.CheckTarget(parent.childTarget) {
		return ErrMissedTarget
	}

	// Check that the block is below the size limit.
	if uint64(len(encoding.Marshal(b))) > types.BlockSizeLimit {
		return ErrLargeBlock
	}

	// Check that the timestamp is not in 'the past', where the past is defined
	// by earliestChildTimestamp.
	if parent.earliestChildTimestamp() > b.Timestamp {
		return ErrEarlyTimestamp
	}

	// If the block is in the extreme future, return an error and do nothing
	// more with the block. There is an assumption that by the time the extreme
	// future arrives, this block will no longer be a part of the longest fork
	// because it will have been ignored by all of the miners.
	if b.Timestamp > types.CurrentTimestamp()+types.ExtremeFutureThreshold {
		return ErrExtremeFutureTimestamp
	}

	// Verify that the miner payouts are valid.
	if !b.CheckMinerPayouts(parent.height + 1) {
		return ErrBadMinerPayouts
	}

	// If the block is in the near future, but too far to be acceptable, then
	// the block will be saved and added to the consensus set after it is no
	// longer too far in the future. This is the last check because it's an
	// expensive check, and not worth performing if the payouts are incorrect.
	if b.Timestamp > types.CurrentTimestamp()+types.FutureThreshold {
		go func() {
			time.Sleep(time.Duration(b.Timestamp-(types.CurrentTimestamp()+types.FutureThreshold)) * time.Second)
			lockID := cs.mu.Lock()
			defer cs.mu.Unlock(lockID)
			cs.acceptBlock(b) // NOTE: Error is not handled.
		}()
		return ErrFutureTimestamp
	}

	return nil
}

// validHeader does some early, low computation verification on the block.
func (cs *ConsensusSet) validHeader(tx *bolt.Tx, b types.Block) error {
	// See if the block is known already.
	id := b.ID()
	_, exists := cs.dosBlocks[id]
	if exists {
		return errDoSBlock
	}

	// Check if the block is already known.
	blockMap := tx.Bucket(BlockMap)
	if blockMap.Get(id[:]) != nil {
		return modules.ErrBlockKnown
	}

	// Check for the parent.
	parentBytes := blockMap.Get(b.ParentID[:])
	if parentBytes == nil {
		return errOrphan
	}
	var parent processedBlock
	err := encoding.Unmarshal(parentBytes, &parent)
	if err != nil {
		return err
	}

	// Check that the target of the new block is sufficient.
	if !b.CheckTarget(parent.ChildTarget) {
		return modules.ErrBlockUnsolved
	}

	// Check that the timestamp is not too far in the past to be
	// acceptable.
	if earliestChildTimestamp(blockMap, &parent) > b.Timestamp {
		return errEarlyTimestamp
	}

	// Check that the block is below the size limit.
	if uint64(len(encoding.Marshal(b))) > types.BlockSizeLimit {
		return errLargeBlock
	}

	// If the block is in the extreme future, return an error and do nothing
	// more with the block. There is an assumption that by the time the extreme
	// future arrives, this block will no longer be a part of the longest fork
	// because it will have been ignored by all of the miners.
	if b.Timestamp > types.CurrentTimestamp()+types.ExtremeFutureThreshold {
		return errExtremeFutureTimestamp
	}

	// Verify that the miner payouts are valid.
	if !b.CheckMinerPayouts(parent.Height + 1) {
		return errBadMinerPayouts
	}

	// If the block is in the near future, but too far to be acceptable, then
	// the block will be saved and added to the consensus set after it is no
	// longer too far in the future. This is the last check because it's an
	// expensive check, and not worth performing if the payouts are incorrect.
	if b.Timestamp > types.CurrentTimestamp()+types.FutureThreshold {
		go func() {
			time.Sleep(time.Duration(b.Timestamp-(types.CurrentTimestamp()+types.FutureThreshold)) * time.Second)
			cs.AcceptBlock(b) // NOTE: Error is not handled.
		}()
		return errFutureTimestamp
	}
	return nil
}