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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 and Networks
// Emoji string `json:"emoji"`
Name string `json:"name"`
Favourite bool `json:"favourite"`
ChainID uint64 `json:"chainId"`
savedAddressMeta
}
func (s *SavedAddress) ID() string {
return fmt.Sprintf("%s-%d", s.Address.Hex(), s.ChainID)
}
type SavedAddressesManager struct {
db *sql.DB
}
func NewSavedAddressesManager(db *sql.DB) *SavedAddressesManager {
return &SavedAddressesManager{db: db}
}
const rawQueryColumnsOrder = "address, name, favourite, network_id, removed, update_clock"
// 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.ChainID, &sa.Removed, &sa.UpdateClock)
if err != nil {
return nil, err
}
addresses = append(addresses, sa)
}
return addresses, nil
}
func (sam *SavedAddressesManager) GetSavedAddressesForChainID(chainID uint64) ([]SavedAddress, error) {
rows, err := sam.db.Query(fmt.Sprintf("SELECT %s FROM saved_addresses WHERE network_id = ? AND removed != 1", rawQueryColumnsOrder), chainID)
if err != nil {
return nil, err
}
defer rows.Close()
addresses, err := getSavedAddressesFromDBRows(rows)
return addresses, err
}
func (sam *SavedAddressesManager) GetSavedAddresses() ([]SavedAddress, error) {
rows, err := sam.db.Query(fmt.Sprintf("SELECT %s FROM saved_addresses WHERE removed != 1", rawQueryColumnsOrder))
if err != nil {
return nil, err
}
defer rows.Close()
addresses, err := getSavedAddressesFromDBRows(rows)
return addresses, err
}
// GetRawSavedAddresses provides access to the soft-delete and sync metadata
func (sam *SavedAddressesManager) GetRawSavedAddresses() ([]SavedAddress, error) {
rows, err := sam.db.Query(fmt.Sprintf("SELECT %s FROM saved_addresses", rawQueryColumnsOrder))
if err != nil {
return nil, err
}
defer rows.Close()
return getSavedAddressesFromDBRows(rows)
}
func (sam *SavedAddressesManager) upsertSavedAddress(sa SavedAddress, tx *sql.Tx) error {
sqlStatement := "INSERT OR REPLACE INTO saved_addresses (network_id, address, name, favourite, removed, update_clock) 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.ChainID, sa.Address, sa.Name, sa.Favourite, sa.Removed, sa.UpdateClock)
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(ChainID uint64, Address common.Address, 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 network_id = ? AND address = ?", ChainID, Address)
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.ChainID, sa.Address, 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) DeleteSavedAddressIfNewerUpdate(chainID uint64, address common.Address, updateClock uint64) (deleted bool, err error) {
newer, tx, err := sam.startTransactionAndCheckIfNewerChange(chainID, address, updateClock)
defer func() {
if err == nil {
err = tx.Commit()
return
}
_ = tx.Rollback()
}()
if !newer {
return false, err
}
var insert *sql.Stmt
insert, err = tx.Prepare(`INSERT OR REPLACE INTO saved_addresses (network_id, address, name, favourite, removed, update_clock) VALUES (?, ?, "", 0, 1, ?)`)
if err != nil {
return false, err
}
defer insert.Close()
_, err = insert.Exec(chainID, address, updateClock)
if err != nil {
return false, err
}
return true, nil
}
func (sam *SavedAddressesManager) DeleteSavedAddress(chainID uint64, address common.Address) (updatedClock uint64, err error) {
insert, err := sam.db.Prepare(`INSERT OR REPLACE INTO saved_addresses (network_id, address, name, favourite, removed, update_clock) VALUES (?, ?, "", 0, 1, ?)`)
if err != nil {
return 0, err
}
defer insert.Close()
updateClock := uint64(time.Now().Unix())
_, err = insert.Exec(chainID, address, updateClock)
if err != nil {
return 0, err
}
return updateClock, 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
}