package core import ( "context" "errors" "fmt" "time" abci "github.com/tendermint/tendermint/abci/types" mempl "github.com/tendermint/tendermint/mempool" ctypes "github.com/tendermint/tendermint/rpc/core/types" rpctypes "github.com/tendermint/tendermint/rpc/jsonrpc/types" "github.com/tendermint/tendermint/types" ) //----------------------------------------------------------------------------- // NOTE: tx should be signed, but this is only checked at the app level (not by Tendermint!) // BroadcastTxAsync returns right away, with no response. Does not wait for // CheckTx nor DeliverTx results. // More: https://docs.tendermint.com/master/rpc/#/Tx/broadcast_tx_async func BroadcastTxAsync(ctx *rpctypes.Context, tx types.Tx) (*ctypes.ResultBroadcastTx, error) { err := env.Mempool.CheckTx(tx, nil, mempl.TxInfo{}) if err != nil { return nil, err } return &ctypes.ResultBroadcastTx{Hash: tx.Hash()}, nil } // BroadcastTxSync returns with the response from CheckTx. Does not wait for // DeliverTx result. // More: https://docs.tendermint.com/master/rpc/#/Tx/broadcast_tx_sync func BroadcastTxSync(ctx *rpctypes.Context, tx types.Tx) (*ctypes.ResultBroadcastTx, error) { resCh := make(chan *abci.Response, 1) err := env.Mempool.CheckTx(tx, func(res *abci.Response) { resCh <- res }, mempl.TxInfo{}) if err != nil { return nil, err } res := <-resCh r := res.GetCheckTx() return &ctypes.ResultBroadcastTx{ Code: r.Code, Data: r.Data, Log: r.Log, Codespace: r.Codespace, Hash: tx.Hash(), }, nil } // BroadcastTxCommit returns with the responses from CheckTx and DeliverTx. // More: https://docs.tendermint.com/master/rpc/#/Tx/broadcast_tx_commit func BroadcastTxCommit(ctx *rpctypes.Context, tx types.Tx) (*ctypes.ResultBroadcastTxCommit, error) { subscriber := ctx.RemoteAddr() if env.EventBus.NumClients() >= env.Config.MaxSubscriptionClients { return nil, fmt.Errorf("max_subscription_clients %d reached", env.Config.MaxSubscriptionClients) } else if env.EventBus.NumClientSubscriptions(subscriber) >= env.Config.MaxSubscriptionsPerClient { return nil, fmt.Errorf("max_subscriptions_per_client %d reached", env.Config.MaxSubscriptionsPerClient) } // Subscribe to tx being committed in block. subCtx, cancel := context.WithTimeout(ctx.Context(), SubscribeTimeout) defer cancel() q := types.EventQueryTxFor(tx) deliverTxSub, err := env.EventBus.Subscribe(subCtx, subscriber, q) if err != nil { err = fmt.Errorf("failed to subscribe to tx: %w", err) env.Logger.Error("Error on broadcast_tx_commit", "err", err) return nil, err } defer env.EventBus.Unsubscribe(context.Background(), subscriber, q) // Broadcast tx and wait for CheckTx result checkTxResCh := make(chan *abci.Response, 1) err = env.Mempool.CheckTx(tx, func(res *abci.Response) { checkTxResCh <- res }, mempl.TxInfo{}) if err != nil { env.Logger.Error("Error on broadcastTxCommit", "err", err) return nil, fmt.Errorf("error on broadcastTxCommit: %v", err) } checkTxResMsg := <-checkTxResCh checkTxRes := checkTxResMsg.GetCheckTx() if checkTxRes.Code != abci.CodeTypeOK { return &ctypes.ResultBroadcastTxCommit{ CheckTx: *checkTxRes, DeliverTx: abci.ResponseDeliverTx{}, Hash: tx.Hash(), }, nil } // Wait for the tx to be included in a block or timeout. select { case msg := <-deliverTxSub.Out(): // The tx was included in a block. deliverTxRes := msg.Data().(types.EventDataTx) return &ctypes.ResultBroadcastTxCommit{ CheckTx: *checkTxRes, DeliverTx: deliverTxRes.Result, Hash: tx.Hash(), Height: deliverTxRes.Height, }, nil case <-deliverTxSub.Cancelled(): var reason string if deliverTxSub.Err() == nil { reason = "Tendermint exited" } else { reason = deliverTxSub.Err().Error() } err = fmt.Errorf("deliverTxSub was cancelled (reason: %s)", reason) env.Logger.Error("Error on broadcastTxCommit", "err", err) return &ctypes.ResultBroadcastTxCommit{ CheckTx: *checkTxRes, DeliverTx: abci.ResponseDeliverTx{}, Hash: tx.Hash(), }, err case <-time.After(env.Config.TimeoutBroadcastTxCommit): err = errors.New("timed out waiting for tx to be included in a block") env.Logger.Error("Error on broadcastTxCommit", "err", err) return &ctypes.ResultBroadcastTxCommit{ CheckTx: *checkTxRes, DeliverTx: abci.ResponseDeliverTx{}, Hash: tx.Hash(), }, err } } // UnconfirmedTxs gets unconfirmed transactions (maximum ?limit entries) // including their number. // More: https://docs.tendermint.com/master/rpc/#/Info/unconfirmed_txs func UnconfirmedTxs(ctx *rpctypes.Context, limitPtr *int) (*ctypes.ResultUnconfirmedTxs, error) { // reuse per_page validator limit := validatePerPage(limitPtr) txs := env.Mempool.ReapMaxTxs(limit) return &ctypes.ResultUnconfirmedTxs{ Count: len(txs), Total: env.Mempool.Size(), TotalBytes: env.Mempool.TxsBytes(), Txs: txs}, nil } // NumUnconfirmedTxs gets number of unconfirmed transactions. // More: https://docs.tendermint.com/master/rpc/#/Info/num_unconfirmed_txs func NumUnconfirmedTxs(ctx *rpctypes.Context) (*ctypes.ResultUnconfirmedTxs, error) { return &ctypes.ResultUnconfirmedTxs{ Count: env.Mempool.Size(), Total: env.Mempool.Size(), TotalBytes: env.Mempool.TxsBytes()}, nil } // CheckTx checks the transaction without executing it. The transaction won't // be added to the mempool either. // More: https://docs.tendermint.com/master/rpc/#/Tx/check_tx func CheckTx(ctx *rpctypes.Context, tx types.Tx) (*ctypes.ResultCheckTx, error) { res, err := env.ProxyAppMempool.CheckTxSync(abci.RequestCheckTx{Tx: tx}) if err != nil { return nil, err } return &ctypes.ResultCheckTx{ResponseCheckTx: *res}, nil }