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saved_addresses.go
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saved_addresses.go
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package wallet
import (
"database/sql"
"fmt"
"time"
"github.com/ethereum/go-ethereum/common"
)
type savedAddressMeta struct {
Removed bool
UpdateClock uint64 // wall clock used to deconflict concurrent updates
}
type SavedAddress struct {
Address common.Address `json:"address"`
// TODO: Add Emoji
// Emoji string `json:"emoji"`
Name string `json:"name"`
Favourite bool `json:"favourite"`
ChainShortNames string `json:"chainShortNames"` // used with address only, not with ENSName
ENSName string `json:"ens"`
IsTest bool `json:"isTest"`
savedAddressMeta
}
func (s *SavedAddress) ID() string {
return fmt.Sprintf("%s-%s-%t", s.Address.Hex(), s.ENSName, s.IsTest)
}
type SavedAddressesManager struct {
db *sql.DB
}
func NewSavedAddressesManager(db *sql.DB) *SavedAddressesManager {
return &SavedAddressesManager{db: db}
}
const rawQueryColumnsOrder = "address, name, favourite, removed, update_clock, chain_short_names, ens_name, is_test"
// getSavedAddressesFromDBRows retrieves all data based on SELECT Query using rawQueryColumnsOrder
func getSavedAddressesFromDBRows(rows *sql.Rows) ([]SavedAddress, error) {
var addresses []SavedAddress
for rows.Next() {
sa := SavedAddress{}
// based on rawQueryColumnsOrder
err := rows.Scan(&sa.Address, &sa.Name, &sa.Favourite, &sa.Removed, &sa.UpdateClock, &sa.ChainShortNames, &sa.ENSName, &sa.IsTest)
if err != nil {
return nil, err
}
addresses = append(addresses, sa)
}
return addresses, nil
}
func (sam *SavedAddressesManager) getSavedAddresses(condition string) ([]SavedAddress, error) {
var whereCondition string
if condition != "" {
whereCondition = fmt.Sprintf("WHERE %s", condition)
}
rows, err := sam.db.Query(fmt.Sprintf("SELECT %s FROM saved_addresses %s", rawQueryColumnsOrder, whereCondition))
if err != nil {
return nil, err
}
defer rows.Close()
addresses, err := getSavedAddressesFromDBRows(rows)
return addresses, err
}
func (sam *SavedAddressesManager) GetSavedAddresses() ([]SavedAddress, error) {
return sam.getSavedAddresses("removed != 1")
}
// GetRawSavedAddresses provides access to the soft-delete and sync metadata
func (sam *SavedAddressesManager) GetRawSavedAddresses() ([]SavedAddress, error) {
return sam.getSavedAddresses("")
}
func (sam *SavedAddressesManager) upsertSavedAddress(sa SavedAddress, tx *sql.Tx) error {
sqlStatement := "INSERT OR REPLACE INTO saved_addresses (address, name, favourite, removed, update_clock, chain_short_names, ens_name, is_test) VALUES (?, ?, ?, ?, ?, ?, ?, ?)"
var err error
var insert *sql.Stmt
if tx != nil {
insert, err = tx.Prepare(sqlStatement)
} else {
insert, err = sam.db.Prepare(sqlStatement)
}
if err != nil {
return err
}
defer insert.Close()
_, err = insert.Exec(sa.Address, sa.Name, sa.Favourite, sa.Removed, sa.UpdateClock, sa.ChainShortNames, sa.ENSName, sa.IsTest)
return err
}
func (sam *SavedAddressesManager) UpdateMetadataAndUpsertSavedAddress(sa SavedAddress) (updatedClock uint64, err error) {
sa.UpdateClock = uint64(time.Now().Unix())
err = sam.upsertSavedAddress(sa, nil)
if err != nil {
return 0, err
}
return sa.UpdateClock, nil
}
func (sam *SavedAddressesManager) startTransactionAndCheckIfNewerChange(address common.Address, ens string, isTest bool, updateClock uint64) (newer bool, tx *sql.Tx, err error) {
tx, err = sam.db.Begin()
if err != nil {
return false, nil, err
}
row := tx.QueryRow("SELECT update_clock FROM saved_addresses WHERE address = ? AND is_test = ? AND ens_name = ?", address, isTest, ens)
if err != nil {
return false, tx, err
}
var dbUpdateClock uint64
err = row.Scan(&dbUpdateClock)
if err != nil {
return err == sql.ErrNoRows, tx, err
}
return dbUpdateClock < updateClock, tx, nil
}
func (sam *SavedAddressesManager) AddSavedAddressIfNewerUpdate(sa SavedAddress, updateClock uint64) (insertedOrUpdated bool, err error) {
newer, tx, err := sam.startTransactionAndCheckIfNewerChange(sa.Address, sa.ENSName, sa.IsTest, updateClock)
defer func() {
if err == nil {
err = tx.Commit()
return
}
_ = tx.Rollback()
}()
if !newer {
return false, err
}
sa.UpdateClock = updateClock
err = sam.upsertSavedAddress(sa, tx)
if err != nil {
return false, err
}
return true, err
}
func (sam *SavedAddressesManager) DeleteSavedAddress(address common.Address, ens string, isTest bool, updateClock uint64) (deleted bool, err error) {
if err != nil {
return false, err
}
newer, tx, err := sam.startTransactionAndCheckIfNewerChange(address, ens, isTest, updateClock)
defer func() {
if err == nil {
err = tx.Commit()
return
}
_ = tx.Rollback()
}()
if !newer {
return false, err
}
update, err := tx.Prepare(`UPDATE saved_addresses SET removed = 1, update_clock = ? WHERE address = ? AND is_test = ? AND ens_name = ?`)
if err != nil {
return false, err
}
defer update.Close()
res, err := update.Exec(updateClock, address, isTest, ens)
if err != nil {
return false, err
}
nRows, err := res.RowsAffected()
if err != nil {
return false, err
}
return nRows > 0, nil
}
func (sam *SavedAddressesManager) DeleteSoftRemovedSavedAddresses(threshold uint64) error {
_, err := sam.db.Exec(`DELETE FROM saved_addresses WHERE removed = 1 AND update_clock < ?`, threshold)
return err
}