package core import ( "fmt" "time" abci "github.com/tendermint/abci/types" data "github.com/tendermint/go-wire/data" ctypes "github.com/tendermint/tendermint/rpc/core/types" "github.com/tendermint/tendermint/types" ) //----------------------------------------------------------------------------- // NOTE: tx should be signed, but this is only checked at the app level (not by Tendermint!) // Returns right away, with no response func BroadcastTxAsync(tx types.Tx) (*ctypes.ResultBroadcastTx, error) { err := mempool.CheckTx(tx, nil) if err != nil { return nil, fmt.Errorf("Error broadcasting transaction: %v", err) } return &ctypes.ResultBroadcastTx{Hash: tx.Hash()}, nil } // Returns with the response from CheckTx func BroadcastTxSync(tx types.Tx) (*ctypes.ResultBroadcastTx, error) { resCh := make(chan *abci.Response, 1) err := mempool.CheckTx(tx, func(res *abci.Response) { resCh <- res }) if err != nil { return nil, fmt.Errorf("Error broadcasting transaction: %v", err) } res := <-resCh r := res.GetCheckTx() return &ctypes.ResultBroadcastTx{ Code: r.Code, Data: r.Data, Log: r.Log, Hash: tx.Hash(), }, nil } // CONTRACT: only returns error if mempool.BroadcastTx errs (ie. problem with the app) // or if we timeout waiting for tx to commit. // If CheckTx or DeliverTx fail, no error will be returned, but the returned result // will contain a non-OK ABCI code. func BroadcastTxCommit(tx types.Tx) (*ctypes.ResultBroadcastTxCommit, error) { // subscribe to tx being committed in block deliverTxResCh := make(chan types.EventDataTx, 1) types.AddListenerForEvent(eventSwitch, "rpc", types.EventStringTx(tx), func(data types.TMEventData) { deliverTxResCh <- data.Unwrap().(types.EventDataTx) }) // broadcast the tx and register checktx callback checkTxResCh := make(chan *abci.Response, 1) err := mempool.CheckTx(tx, func(res *abci.Response) { checkTxResCh <- res }) if err != nil { logger.Error("err", "err", err) return nil, fmt.Errorf("Error broadcasting transaction: %v", err) } checkTxRes := <-checkTxResCh checkTxR := checkTxRes.GetCheckTx() if checkTxR.Code != abci.CodeType_OK { // CheckTx failed! return &ctypes.ResultBroadcastTxCommit{ CheckTx: checkTxR.Result(), DeliverTx: abci.Result{}, Hash: tx.Hash(), }, nil } // Wait for the tx to be included in a block, // timeout after something reasonable. // TODO: configureable? timer := time.NewTimer(60 * 2 * time.Second) select { case deliverTxRes := <-deliverTxResCh: // The tx was included in a block. deliverTxR := &abci.ResponseDeliverTx{ Code: deliverTxRes.Code, Data: deliverTxRes.Data, Log: deliverTxRes.Log, } logger.Info("DeliverTx passed ", "tx", data.Bytes(tx), "response", deliverTxR) return &ctypes.ResultBroadcastTxCommit{ CheckTx: checkTxR.Result(), DeliverTx: deliverTxR.Result(), Hash: tx.Hash(), Height: deliverTxRes.Height, }, nil case <-timer.C: logger.Error("failed to include tx") return &ctypes.ResultBroadcastTxCommit{ CheckTx: checkTxR.Result(), DeliverTx: abci.Result{}, Hash: tx.Hash(), }, fmt.Errorf("Timed out waiting for transaction to be included in a block") } panic("Should never happen!") } func UnconfirmedTxs() (*ctypes.ResultUnconfirmedTxs, error) { txs := mempool.Reap(-1) return &ctypes.ResultUnconfirmedTxs{len(txs), txs}, nil } func NumUnconfirmedTxs() (*ctypes.ResultUnconfirmedTxs, error) { return &ctypes.ResultUnconfirmedTxs{N: mempool.Size()}, nil }