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package core
import (
"context"
"fmt"
"time"
"github.com/pkg/errors"
abci "github.com/tendermint/tendermint/abci/types"
ctypes "github.com/tendermint/tendermint/rpc/core/types"
"github.com/tendermint/tendermint/types"
cmn "github.com/tendermint/tendermint/libs/common"
)
//-----------------------------------------------------------------------------
// NOTE: tx should be signed, but this is only checked at the app level (not by Tendermint!)
// Returns right away, with no response
//
// ```shell
// curl 'localhost:26657/broadcast_tx_async?tx="123"'
// ```
//
// ```go
// client := client.NewHTTP("tcp://0.0.0.0:26657", "/websocket")
// result, err := client.BroadcastTxAsync("123")
// ```
//
// > The above command returns JSON structured like this:
//
// ```json
// {
// "error": "",
// "result": {
// "hash": "E39AAB7A537ABAA237831742DCE1117F187C3C52",
// "log": "",
// "data": "",
// "code": 0
// },
// "id": "",
// "jsonrpc": "2.0"
// }
// ```
//
// ### Query Parameters
//
// | Parameter | Type | Default | Required | Description |
// |-----------+------+---------+----------+-----------------|
// | tx | Tx | nil | true | The transaction |
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.
//
// ```shell
// curl 'localhost:26657/broadcast_tx_sync?tx="456"'
// ```
//
// ```go
// client := client.NewHTTP("tcp://0.0.0.0:26657", "/websocket")
// result, err := client.BroadcastTxSync("456")
// ```
//
// > The above command returns JSON structured like this:
//
// ```json
// {
// "jsonrpc": "2.0",
// "id": "",
// "result": {
// "code": 0,
// "data": "",
// "log": "",
// "hash": "0D33F2F03A5234F38706E43004489E061AC40A2E"
// },
// "error": ""
// }
// ```
//
// ### Query Parameters
//
// | Parameter | Type | Default | Required | Description |
// |-----------+------+---------+----------+-----------------|
// | tx | Tx | nil | true | The transaction |
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.
//
// ```shell
// curl 'localhost:26657/broadcast_tx_commit?tx="789"'
// ```
//
// ```go
// client := client.NewHTTP("tcp://0.0.0.0:26657", "/websocket")
// result, err := client.BroadcastTxCommit("789")
// ```
//
// > The above command returns JSON structured like this:
//
// ```json
// {
// "error": "",
// "result": {
// "height": 26682,
// "hash": "75CA0F856A4DA078FC4911580360E70CEFB2EBEE",
// "deliver_tx": {
// "log": "",
// "data": "",
// "code": 0
// },
// "check_tx": {
// "log": "",
// "data": "",
// "code": 0
// }
// },
// "id": "",
// "jsonrpc": "2.0"
// }
// ```
//
// ### Query Parameters
//
// | Parameter | Type | Default | Required | Description |
// |-----------+------+---------+----------+-----------------|
// | tx | Tx | nil | true | The transaction |
func BroadcastTxCommit(tx types.Tx) (*ctypes.ResultBroadcastTxCommit, error) {
// subscribe to tx being committed in block
ctx, cancel := context.WithTimeout(context.Background(), subscribeTimeout)
defer cancel()
deliverTxResCh := make(chan interface{})
q := types.EventQueryTxFor(tx)
err := eventBus.Subscribe(ctx, "mempool", q, deliverTxResCh)
if err != nil {
err = errors.Wrap(err, "failed to subscribe to tx")
logger.Error("Error on broadcastTxCommit", "err", err)
return nil, fmt.Errorf("Error on broadcastTxCommit: %v", err)
}
defer eventBus.Unsubscribe(context.Background(), "mempool", q)
// 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("Error on broadcastTxCommit", "err", err)
return nil, fmt.Errorf("Error on broadcastTxCommit: %v", err)
}
checkTxRes := <-checkTxResCh
checkTxR := checkTxRes.GetCheckTx()
if checkTxR.Code != abci.CodeTypeOK {
// CheckTx failed!
return &ctypes.ResultBroadcastTxCommit{
CheckTx: *checkTxR,
DeliverTx: abci.ResponseDeliverTx{},
Hash: tx.Hash(),
}, nil
}
// Wait for the tx to be included in a block,
// timeout after something reasonable.
// TODO: configurable?
timer := time.NewTimer(60 * 2 * time.Second)
select {
case deliverTxResMsg := <-deliverTxResCh:
deliverTxRes := deliverTxResMsg.(types.EventDataTx)
// The tx was included in a block.
deliverTxR := deliverTxRes.Result
logger.Info("DeliverTx passed ", "tx", cmn.HexBytes(tx), "response", deliverTxR)
return &ctypes.ResultBroadcastTxCommit{
CheckTx: *checkTxR,
DeliverTx: deliverTxR,
Hash: tx.Hash(),
Height: deliverTxRes.Height,
}, nil
case <-timer.C:
logger.Error("failed to include tx")
return &ctypes.ResultBroadcastTxCommit{
CheckTx: *checkTxR,
DeliverTx: abci.ResponseDeliverTx{},
Hash: tx.Hash(),
}, fmt.Errorf("Timed out waiting for transaction to be included in a block")
}
}
// Get unconfirmed transactions (maximum ?limit entries) including their number.
//
// ```shell
// curl 'localhost:26657/unconfirmed_txs'
// ```
//
// ```go
// client := client.NewHTTP("tcp://0.0.0.0:26657", "/websocket")
// result, err := client.UnconfirmedTxs()
// ```
//
// > The above command returns JSON structured like this:
//
// ```json
// {
// "error": "",
// "result": {
// "txs": [],
// "n_txs": 0
// },
// "id": "",
// "jsonrpc": "2.0"
// }
//
// ### Query Parameters
//
// | Parameter | Type | Default | Required | Description |
// |-----------+------+---------+----------+--------------------------------------|
// | limit | int | 30 | false | Maximum number of entries (max: 100) |
// ```
func UnconfirmedTxs(limit int) (*ctypes.ResultUnconfirmedTxs, error) {
// reuse per_page validator
limit = validatePerPage(limit)
txs := mempool.Reap(limit)
return &ctypes.ResultUnconfirmedTxs{len(txs), txs}, nil
}
// Get number of unconfirmed transactions.
//
// ```shell
// curl 'localhost:26657/num_unconfirmed_txs'
// ```
//
// ```go
// client := client.NewHTTP("tcp://0.0.0.0:26657", "/websocket")
// result, err := client.UnconfirmedTxs()
// ```
//
// > The above command returns JSON structured like this:
//
// ```json
// {
// "error": "",
// "result": {
// "txs": null,
// "n_txs": 0
// },
// "id": "",
// "jsonrpc": "2.0"
// }
// ```
func NumUnconfirmedTxs() (*ctypes.ResultUnconfirmedTxs, error) {
return &ctypes.ResultUnconfirmedTxs{N: mempool.Size()}, nil
}