status-go/services/wallet/transfer/block_ranges_sequential_dao.go

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package transfer
import (
"database/sql"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/log"
"github.com/status-im/status-go/services/wallet/bigint"
)
type BlockRangeSequentialDAO struct {
db *sql.DB
}
type BlockRange struct {
Start *big.Int // Block of first transfer
FirstKnown *big.Int // Oldest scanned block
LastKnown *big.Int // Last scanned block
}
func NewBlockRange() *BlockRange {
return &BlockRange{Start: &big.Int{}, FirstKnown: &big.Int{}, LastKnown: &big.Int{}}
}
func (b *BlockRangeSequentialDAO) getBlockRange(chainID uint64, address common.Address) (blockRange *BlockRange, err error) {
query := `SELECT blk_start, blk_first, blk_last FROM blocks_ranges_sequential
WHERE address = ?
AND network_id = ?`
rows, err := b.db.Query(query, address, chainID)
if err != nil {
return
}
defer rows.Close()
if rows.Next() {
blockRange = NewBlockRange()
err = rows.Scan((*bigint.SQLBigInt)(blockRange.Start), (*bigint.SQLBigInt)(blockRange.FirstKnown), (*bigint.SQLBigInt)(blockRange.LastKnown))
if err != nil {
return nil, err
}
return blockRange, nil
}
return nil, nil
}
// TODO call it when account is removed
//
//lint:ignore U1000 Ignore unused function temporarily
func (b *BlockRangeSequentialDAO) deleteRange(chainID uint64, account common.Address) error {
log.Debug("delete blocks range", "account", account, "network", chainID)
delete, err := b.db.Prepare(`DELETE FROM blocks_ranges_sequential
WHERE address = ?
AND network_id = ?`)
if err != nil {
log.Error("Failed to prepare deletion of sequential block range", "error", err)
return err
}
_, err = delete.Exec(account, chainID)
return err
}
func (b *BlockRangeSequentialDAO) upsertRange(chainID uint64, account common.Address,
newBlockRange *BlockRange) (err error) {
log.Debug("upsert blocks range", "account", account, "chainID", chainID,
"start", newBlockRange.Start, "first", newBlockRange.FirstKnown, "last", newBlockRange.LastKnown)
blockRange, err := b.getBlockRange(chainID, account)
if err != nil {
return err
}
// Update existing range
if blockRange != nil {
// Ovewrite start block if there was not any or if new one is older, because it can be precised only
// to a greater value, because no history can be before some block that is considered
// as a start of history, but due to concurrent block range checks, a newer greater block
// can be found that matches criteria of a start block (nonce is zero, balances are equal)
if newBlockRange.Start != nil && (blockRange.Start == nil || blockRange.Start.Cmp(newBlockRange.Start) < 0) {
blockRange.Start = newBlockRange.Start
}
// Overwrite first known block if there was not any or if new one is older
if (blockRange.FirstKnown == nil && newBlockRange.FirstKnown != nil) ||
(blockRange.FirstKnown != nil && newBlockRange.FirstKnown != nil && blockRange.FirstKnown.Cmp(newBlockRange.FirstKnown) > 0) {
blockRange.FirstKnown = newBlockRange.FirstKnown
}
// Overwrite last known block if there was not any or if new one is newer
if (blockRange.LastKnown == nil && newBlockRange.LastKnown != nil) ||
(blockRange.LastKnown != nil && newBlockRange.LastKnown != nil && blockRange.LastKnown.Cmp(newBlockRange.LastKnown) < 0) {
blockRange.LastKnown = newBlockRange.LastKnown
}
log.Debug("update blocks range", "account", account, "chainID", chainID,
"start", blockRange.Start, "first", blockRange.FirstKnown, "last", blockRange.LastKnown)
} else {
blockRange = newBlockRange
}
upsert, err := b.db.Prepare(`REPLACE INTO blocks_ranges_sequential
(network_id, address, blk_start, blk_first, blk_last) VALUES (?, ?, ?, ?, ?)`)
if err != nil {
return err
}
_, err = upsert.Exec(chainID, account, (*bigint.SQLBigInt)(blockRange.Start), (*bigint.SQLBigInt)(blockRange.FirstKnown),
(*bigint.SQLBigInt)(blockRange.LastKnown))
return
}