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blocks.go
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blocks.go
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// Copyright (c) 2022 Gobalsky Labs Limited
//
// Use of this software is governed by the Business Source License included
// in the LICENSE.DATANODE file and at https://www.mariadb.com/bsl11.
//
// Change Date: 18 months from the later of the date of the first publicly
// available Distribution of this version of the repository, and 25 June 2022.
//
// On the date above, in accordance with the Business Source License, use
// of this software will be governed by version 3 or later of the GNU General
// Public License.
package sqlstore
import (
"context"
"errors"
"fmt"
"sync"
"time"
"code.vegaprotocol.io/vega/datanode/entities"
"code.vegaprotocol.io/vega/datanode/metrics"
"github.com/georgysavva/scany/pgxscan"
"github.com/jackc/pgx/v4"
)
var (
ErrNoHistoryBlock = errors.New("No history block")
ErrNoLastBlock = errors.New("No last block")
ErrBlockWaitTimedout = errors.New("Timed out waiting for TimeUpdate event")
BlockWaitTimeout = 5 * time.Second
)
type Blocks struct {
*ConnectionSource
lastBlock *entities.Block
mu sync.Mutex
}
func NewBlocks(connectionSource *ConnectionSource) *Blocks {
b := &Blocks{
ConnectionSource: connectionSource,
}
return b
}
func (bs *Blocks) Add(ctx context.Context, b entities.Block) error {
defer metrics.StartSQLQuery("Blocks", "Add")()
_, err := bs.Connection.Exec(ctx,
`insert into blocks(vega_time, height, hash) values ($1, $2, $3)`,
b.VegaTime, b.Height, b.Hash)
if err != nil {
return fmt.Errorf("adding block: %w", err)
}
bs.setLastBlock(b)
return nil
}
func (bs *Blocks) GetAll() ([]entities.Block, error) {
defer metrics.StartSQLQuery("Blocks", "GetAll")()
ctx := context.Background()
blocks := []entities.Block{}
err := pgxscan.Select(ctx, bs.Connection, &blocks,
`SELECT vega_time, height, hash
FROM blocks
ORDER BY vega_time desc`)
return blocks, err
}
func (bs *Blocks) GetAtHeight(ctx context.Context, height int64) (entities.Block, error) {
// Check if it's in our cache first
block, err := bs.GetLastBlock(ctx)
if err == nil && block.Height == height {
return block, nil
}
// Else query the database
defer metrics.StartSQLQuery("Blocks", "GetAtHeight")()
err = pgxscan.Get(context.Background(), bs.Connection, &block,
`SELECT vega_time, height, hash
FROM blocks
WHERE height=$1`, height)
return block, err
}
// GetLastBlock return the last block or ErrNoLastBlock if no block is found.
func (bs *Blocks) GetLastBlock(ctx context.Context) (entities.Block, error) {
bs.mu.Lock()
defer bs.mu.Unlock()
if bs.lastBlock != nil {
return *bs.lastBlock, nil
}
defer metrics.StartSQLQuery("Blocks", "GetLastBlock")()
lastBlock, err := GetLastBlockUsingConnection(ctx, bs.Connection)
bs.lastBlock = lastBlock
if err != nil {
return entities.Block{}, err
}
return *lastBlock, err
}
func (bs *Blocks) setLastBlock(b entities.Block) {
bs.mu.Lock()
defer bs.mu.Unlock()
bs.lastBlock = &b
}
func (bs *Blocks) GetOldestHistoryBlock(ctx context.Context) (entities.Block, error) {
defer metrics.StartSQLQuery("Blocks", "GetOldestHistoryBlock")()
return GetOldestHistoryBlockUsingConnection(ctx, bs.Connection)
}
func GetOldestHistoryBlockUsingConnection(ctx context.Context, connection Connection) (entities.Block, error) {
block := &entities.Block{}
err := pgxscan.Get(ctx, connection, block, `SELECT vega_time, height, hash
FROM blocks order by height asc limit 1`)
if errors.Is(err, pgx.ErrNoRows) {
return entities.Block{}, ErrNoHistoryBlock
}
if err != nil {
return entities.Block{}, err
}
return *block, nil
}
func GetLastBlockUsingConnection(ctx context.Context, connection Connection) (*entities.Block, error) {
block := &entities.Block{}
err := pgxscan.Get(ctx, connection, block,
`SELECT vega_time, height, hash
FROM last_block`)
if errors.Is(err, pgx.ErrNoRows) {
return nil, ErrNoLastBlock
}
return block, err
}