115 lines
2.8 KiB
Go
115 lines
2.8 KiB
Go
package wallet
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import (
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"context"
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"errors"
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"math/big"
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"sync"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/ethclient"
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"github.com/ethereum/go-ethereum/event"
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"github.com/status-im/status-go/params"
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)
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// pow block on main chain is mined once per ~14 seconds
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// but for tests we are using clique chain with immediate block signer
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// hence we can use different polling periods for methods that depend on mining time.
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func pollingPeriodByChain(chain *big.Int) time.Duration {
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switch chain.Int64() {
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case int64(params.MainNetworkID):
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return 10 * time.Second
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case int64(params.RopstenNetworkID):
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return 2 * time.Second
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default:
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return 500 * time.Millisecond
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}
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}
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var (
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reorgSafetyDepth = big.NewInt(15)
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erc20BatchSize = big.NewInt(100000)
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)
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// HeaderReader interface for reading headers using block number or hash.
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type HeaderReader interface {
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HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error)
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HeaderByNumber(ctx context.Context, number *big.Int) (*types.Header, error)
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}
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// BalanceReader interface for reading balance at a specifeid address.
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type BalanceReader interface {
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BalanceAt(ctx context.Context, account common.Address, blockNumber *big.Int) (*big.Int, error)
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}
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type reactorClient interface {
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HeaderReader
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BalanceReader
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}
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// NewReactor creates instance of the Reactor.
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func NewReactor(db *Database, feed *event.Feed, client *ethclient.Client, accounts []common.Address, chain *big.Int) *Reactor {
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return &Reactor{
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db: db,
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client: client,
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feed: feed,
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accounts: accounts,
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chain: chain,
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}
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}
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// Reactor listens to new blocks and stores transfers into the database.
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type Reactor struct {
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client *ethclient.Client
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db *Database
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feed *event.Feed
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accounts []common.Address
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chain *big.Int
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mu sync.Mutex
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group *Group
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}
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// Start runs reactor loop in background.
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func (r *Reactor) Start() error {
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r.mu.Lock()
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defer r.mu.Unlock()
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if r.group != nil {
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return errors.New("already running")
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}
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r.group = NewGroup(context.Background())
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// TODO(dshulyak) to support adding accounts in runtime implement keyed group
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// and export private api to start downloaders from accounts
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// private api should have access only to reactor
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ctl := &controlCommand{
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db: r.db,
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chain: r.chain,
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client: r.client,
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accounts: r.accounts,
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eth: ÐTransferDownloader{
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client: r.client,
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accounts: r.accounts,
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signer: types.NewEIP155Signer(r.chain),
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},
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erc20: NewERC20TransfersDownloader(r.client, r.accounts),
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feed: r.feed,
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safetyDepth: reorgSafetyDepth,
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}
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r.group.Add(ctl.Command())
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return nil
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}
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// Stop stops reactor loop and waits till it exits.
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func (r *Reactor) Stop() {
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r.mu.Lock()
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defer r.mu.Unlock()
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if r.group == nil {
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return
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}
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r.group.Stop()
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r.group.Wait()
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r.group = nil
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}
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