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alteredAccountsProvider.go
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/
alteredAccountsProvider.go
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package alteredaccounts
import (
"fmt"
"math/big"
"sync"
"github.com/ElrondNetwork/elrond-go-core/core"
"github.com/ElrondNetwork/elrond-go-core/core/check"
"github.com/ElrondNetwork/elrond-go-core/data"
"github.com/ElrondNetwork/elrond-go-core/data/esdt"
outportcore "github.com/ElrondNetwork/elrond-go-core/data/outport"
logger "github.com/ElrondNetwork/elrond-go-logger"
"github.com/ElrondNetwork/elrond-go/outport/process/alteredaccounts/shared"
"github.com/ElrondNetwork/elrond-go/process"
"github.com/ElrondNetwork/elrond-go/sharding"
"github.com/ElrondNetwork/elrond-go/state"
vmcommon "github.com/ElrondNetwork/elrond-vm-common"
)
var (
log = logger.GetOrCreate("outport/process/alteredaccounts")
)
type markedAlteredAccountToken struct {
identifier string
nonce uint64
isNFTCreate bool
}
type markedAlteredAccount struct {
balanceChanged bool
isSender bool
tokens map[string]*markedAlteredAccountToken
}
// ArgsAlteredAccountsProvider holds the arguments needed for creating a new instance of alteredAccountsProvider
type ArgsAlteredAccountsProvider struct {
ShardCoordinator sharding.Coordinator
AddressConverter core.PubkeyConverter
AccountsDB state.AccountsAdapter
EsdtDataStorageHandler vmcommon.ESDTNFTStorageHandler
}
type alteredAccountsProvider struct {
shardCoordinator sharding.Coordinator
addressConverter core.PubkeyConverter
accountsDB state.AccountsAdapter
tokensProc *tokensProcessor
esdtDataStorageHandler vmcommon.ESDTNFTStorageHandler
mutExtractAccounts sync.Mutex
}
// NewAlteredAccountsProvider returns a new instance of alteredAccountsProvider
func NewAlteredAccountsProvider(args ArgsAlteredAccountsProvider) (*alteredAccountsProvider, error) {
err := checkArgAlteredAccountsProvider(args)
if err != nil {
return nil, err
}
return &alteredAccountsProvider{
shardCoordinator: args.ShardCoordinator,
addressConverter: args.AddressConverter,
accountsDB: args.AccountsDB,
tokensProc: newTokensProcessor(args.ShardCoordinator),
esdtDataStorageHandler: args.EsdtDataStorageHandler,
}, nil
}
// ExtractAlteredAccountsFromPool will extract and return altered accounts from the pool
func (aap *alteredAccountsProvider) ExtractAlteredAccountsFromPool(txPool *outportcore.Pool, options shared.AlteredAccountsOptions) (map[string]*outportcore.AlteredAccount, error) {
if err := options.Verify(); err != nil {
return nil, err
}
aap.mutExtractAccounts.Lock()
defer aap.mutExtractAccounts.Unlock()
if txPool == nil {
log.Warn("alteredAccountsProvider: ExtractAlteredAccountsFromPool", "txPool is nil", "will return")
return map[string]*outportcore.AlteredAccount{}, nil
}
markedAccounts := make(map[string]*markedAlteredAccount)
aap.extractAddressesWithBalanceChange(txPool, markedAccounts)
err := aap.tokensProc.extractESDTAccounts(txPool, markedAccounts)
if err != nil {
return nil, err
}
return aap.fetchDataForMarkedAccounts(markedAccounts, options)
}
func (aap *alteredAccountsProvider) fetchDataForMarkedAccounts(markedAccounts map[string]*markedAlteredAccount, options shared.AlteredAccountsOptions) (map[string]*outportcore.AlteredAccount, error) {
alteredAccounts := make(map[string]*outportcore.AlteredAccount)
var err error
for address, markedAccount := range markedAccounts {
err = aap.processMarkedAccountData(address, markedAccount, alteredAccounts, options)
if err != nil {
return nil, err
}
}
return alteredAccounts, nil
}
func (aap *alteredAccountsProvider) processMarkedAccountData(
addressStr string,
markedAccount *markedAlteredAccount,
alteredAccounts map[string]*outportcore.AlteredAccount,
options shared.AlteredAccountsOptions,
) error {
addressBytes := []byte(addressStr)
encodedAddress := aap.addressConverter.Encode(addressBytes)
userAccount, err := aap.loadUserAccount(addressBytes, options)
if err != nil {
return fmt.Errorf("%w while loading account when computing altered accounts. address: %s", err, encodedAddress)
}
alteredAccounts[encodedAddress] = &outportcore.AlteredAccount{
Address: encodedAddress,
Balance: userAccount.GetBalance().String(),
Nonce: userAccount.GetNonce(),
}
if options.WithAdditionalOutportData {
alteredAccounts[encodedAddress].AdditionalData = &outportcore.AdditionalAccountData{
IsSender: markedAccount.isSender,
BalanceChanged: markedAccount.balanceChanged,
}
}
for _, tokenData := range markedAccount.tokens {
err = aap.addTokensDataForMarkedAccount(encodedAddress, userAccount, tokenData, alteredAccounts, options)
if err != nil {
return fmt.Errorf("%w while fetching token data when computing altered accounts", err)
}
}
return nil
}
func (aap *alteredAccountsProvider) loadUserAccount(addressBytes []byte, options shared.AlteredAccountsOptions) (state.UserAccountHandler, error) {
var account vmcommon.AccountHandler
var err error
if !options.WithCustomAccountsRepository {
account, err = aap.accountsDB.LoadAccount(addressBytes)
} else {
account, _, err = options.AccountsRepository.GetAccountWithBlockInfo(addressBytes, options.AccountQueryOptions)
}
if err != nil {
return nil, err
}
userAccount, ok := account.(state.UserAccountHandler)
if !ok {
return nil, errCannotCastToUserAccountHandler
}
return userAccount, nil
}
func (aap *alteredAccountsProvider) addTokensDataForMarkedAccount(
encodedAddress string,
userAccount state.UserAccountHandler,
markedAccountToken *markedAlteredAccountToken,
alteredAccounts map[string]*outportcore.AlteredAccount,
options shared.AlteredAccountsOptions,
) error {
nonce := markedAccountToken.nonce
tokenID := markedAccountToken.identifier
storageKey := []byte(core.ElrondProtectedKeyPrefix + core.ESDTKeyIdentifier)
storageKey = append(storageKey, []byte(tokenID)...)
userAccountVmCommon, ok := userAccount.(vmcommon.UserAccountHandler)
if !ok {
return fmt.Errorf("%w for address %s", errCannotCastToVmCommonUserAccountHandler, encodedAddress)
}
esdtToken, _, err := aap.esdtDataStorageHandler.GetESDTNFTTokenOnDestination(userAccountVmCommon, storageKey, nonce)
if err != nil {
return err
}
if esdtToken == nil {
log.Warn("alteredAccountsProvider: nil esdt/nft token", "address", encodedAddress, "token ID", tokenID, "nonce", nonce)
return nil
}
accountTokenData := &outportcore.AccountTokenData{
Identifier: tokenID,
Balance: esdtToken.Value.String(),
Nonce: nonce,
Properties: string(esdtToken.Properties),
MetaData: aap.convertMetaData(esdtToken.TokenMetaData),
}
if options.WithAdditionalOutportData {
accountTokenData.AdditionalData = &outportcore.AdditionalAccountTokenData{
IsNFTCreate: markedAccountToken.isNFTCreate,
}
}
alteredAccount := alteredAccounts[encodedAddress]
alteredAccount.Tokens = append(alteredAccounts[encodedAddress].Tokens, accountTokenData)
return nil
}
func (aap *alteredAccountsProvider) convertMetaData(metaData *esdt.MetaData) *outportcore.TokenMetaData {
if metaData == nil {
return nil
}
return &outportcore.TokenMetaData{
Nonce: metaData.Nonce,
Name: string(metaData.Name),
Creator: aap.addressConverter.Encode(metaData.Creator),
Royalties: metaData.Royalties,
Hash: metaData.Hash,
URIs: metaData.URIs,
Attributes: metaData.Attributes,
}
}
func (aap *alteredAccountsProvider) extractAddressesWithBalanceChange(
txPool *outportcore.Pool,
markedAlteredAccounts map[string]*markedAlteredAccount,
) {
selfShardID := aap.shardCoordinator.SelfId()
aap.extractAddressesFromTxsHandlers(selfShardID, txPool.Txs, markedAlteredAccounts, process.MoveBalance)
aap.extractAddressesFromTxsHandlers(selfShardID, txPool.Scrs, markedAlteredAccounts, process.SCInvoking)
aap.extractAddressesFromTxsHandlers(selfShardID, txPool.Rewards, markedAlteredAccounts, process.RewardTx)
aap.extractAddressesFromTxsHandlers(selfShardID, txPool.Invalid, markedAlteredAccounts, process.InvalidTransaction)
}
func (aap *alteredAccountsProvider) extractAddressesFromTxsHandlers(
selfShardID uint32,
txsHandlers map[string]data.TransactionHandlerWithGasUsedAndFee,
markedAlteredAccounts map[string]*markedAlteredAccount,
txType process.TransactionType,
) {
for _, txHandler := range txsHandlers {
senderAddress := txHandler.GetSndAddr()
receiverAddress := txHandler.GetRcvAddr()
senderShardID := aap.shardCoordinator.ComputeId(senderAddress)
receiverShardID := aap.shardCoordinator.ComputeId(receiverAddress)
if senderShardID == selfShardID && len(senderAddress) > 0 {
aap.addAddressWithBalanceChangeInMap(senderAddress, markedAlteredAccounts, true)
}
txValue := txHandler.GetValue()
if txValue == nil {
txValue = big.NewInt(0)
}
balanceChanged := txValue.Cmp(big.NewInt(0)) > 0
isValid := txType != process.InvalidTransaction
isOnCurrentShard := receiverShardID == selfShardID
addReceiver := isValid && isOnCurrentShard && balanceChanged && len(receiverAddress) > 0
if addReceiver {
aap.addAddressWithBalanceChangeInMap(receiverAddress, markedAlteredAccounts, false)
}
}
}
func (aap *alteredAccountsProvider) addAddressWithBalanceChangeInMap(
address []byte,
markedAlteredAccounts map[string]*markedAlteredAccount,
isSender bool,
) {
isValidAddress := len(address) == aap.addressConverter.Len()
if !isValidAddress {
return
}
addressStr := string(address)
_, addressAlreadySelected := markedAlteredAccounts[addressStr]
if addressAlreadySelected {
markedAlteredAccounts[addressStr].isSender = markedAlteredAccounts[addressStr].isSender || isSender
markedAlteredAccounts[addressStr].balanceChanged = true
return
}
markedAlteredAccounts[addressStr] = &markedAlteredAccount{
isSender: isSender,
balanceChanged: true,
}
}
// IsInterfaceNil returns true if there is no value under the interface
func (aap *alteredAccountsProvider) IsInterfaceNil() bool {
return aap == nil
}
func checkArgAlteredAccountsProvider(arg ArgsAlteredAccountsProvider) error {
if check.IfNil(arg.ShardCoordinator) {
return errNilShardCoordinator
}
if check.IfNil(arg.AddressConverter) {
return ErrNilPubKeyConverter
}
if check.IfNil(arg.AccountsDB) {
return ErrNilAccountsDB
}
if check.IfNil(arg.EsdtDataStorageHandler) {
return ErrNilESDTDataStorageHandler
}
return nil
}