status-go/services/wallet/persistence.go

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package wallet
import (
"context"
"database/sql"
"math/big"
"github.com/ethereum/go-ethereum/common"
)
type Persistence struct {
db *sql.DB
}
func NewPersistence(db *sql.DB) *Persistence {
return &Persistence{db: db}
}
func (p *Persistence) SaveTokens(tokens map[common.Address][]Token) (err error) {
tx, err := p.db.BeginTx(context.Background(), &sql.TxOptions{})
if err != nil {
return
}
defer func() {
if err == nil {
err = tx.Commit()
return
}
// don't shadow original error
_ = tx.Rollback()
}()
for address, addressTokens := range tokens {
for _, t := range addressTokens {
for chainID, b := range t.BalancesPerChain {
if b.HasError || b.Balance.Cmp(big.NewFloat(0)) == 0 {
continue
}
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_, err = tx.Exec(`INSERT INTO token_balances(user_address,token_name,token_symbol,token_address,token_decimals,token_description,token_url,balance,raw_balance,chain_id) VALUES (?,?,?,?,?,?,?,?,?,?)`, address.Hex(), t.Name, t.Symbol, b.Address.Hex(), t.Decimals, t.Description, t.AssetWebsiteURL, b.Balance.String(), b.RawBalance, chainID)
if err != nil {
return err
}
}
}
}
return nil
}
func (p *Persistence) GetTokens() (map[common.Address][]Token, error) {
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rows, err := p.db.Query(`SELECT user_address, token_name, token_symbol, token_address, token_decimals, token_description, token_url, balance, raw_balance, chain_id FROM token_balances `)
if err != nil {
return nil, err
}
defer rows.Close()
acc := make(map[common.Address]map[string]Token)
for rows.Next() {
var addressStr, balance, rawBalance, tokenAddress string
token := Token{}
var chainID uint64
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err := rows.Scan(&addressStr, &token.Name, &token.Symbol, &tokenAddress, &token.Decimals, &token.Description, &token.AssetWebsiteURL, &balance, &rawBalance, &chainID)
if err != nil {
return nil, err
}
address := common.HexToAddress(addressStr)
if acc[address] == nil {
acc[address] = make(map[string]Token)
}
if acc[address][token.Name].Name == "" {
token.BalancesPerChain = make(map[uint64]ChainBalance)
acc[address][token.Name] = token
}
tokenAcc := acc[address][token.Name]
balanceFloat := new(big.Float)
_, _, err = balanceFloat.Parse(balance, 10)
if err != nil {
return nil, err
}
tokenAcc.BalancesPerChain[chainID] = ChainBalance{
RawBalance: rawBalance,
Balance: balanceFloat,
Address: common.HexToAddress(tokenAddress),
ChainID: chainID,
}
}
result := make(map[common.Address][]Token)
for address, tks := range acc {
for _, t := range tks {
result[address] = append(result[address], t)
}
}
return result, nil
}