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110 lines
3.5 KiB
110 lines
3.5 KiB
package core
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import (
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"fmt"
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"time"
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ctypes "github.com/tendermint/tendermint/rpc/core/types"
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"github.com/tendermint/tendermint/types"
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tmsp "github.com/tendermint/tmsp/types"
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)
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//-----------------------------------------------------------------------------
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// NOTE: tx should be signed, but this is only checked at the app level (not by Tendermint!)
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// Returns right away, with no response
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func BroadcastTxAsync(tx types.Tx) (*ctypes.ResultBroadcastTx, error) {
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err := mempool.CheckTx(tx, nil)
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if err != nil {
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return nil, fmt.Errorf("Error broadcasting transaction: %v", err)
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}
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return &ctypes.ResultBroadcastTx{}, nil
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}
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// Returns with the response from CheckTx
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func BroadcastTxSync(tx types.Tx) (*ctypes.ResultBroadcastTx, error) {
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resCh := make(chan *tmsp.Response, 1)
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err := mempool.CheckTx(tx, func(res *tmsp.Response) {
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resCh <- res
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})
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if err != nil {
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return nil, fmt.Errorf("Error broadcasting transaction: %v", err)
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}
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res := <-resCh
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r := res.GetCheckTx()
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return &ctypes.ResultBroadcastTx{
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Code: r.Code,
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Data: r.Data,
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Log: r.Log,
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}, nil
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}
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// CONTRACT: returns error==nil iff the tx is included in a block.
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//
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// If CheckTx fails, return with the response from CheckTx AND an error.
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// Else, block until the tx is included in a block,
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// and return the result of AppendTx (with no error).
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// Even if AppendTx fails, so long as the tx is included in a block this function
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// will not return an error - it is the caller's responsibility to check res.Code.
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// The function times out after five minutes and returns the result of CheckTx and an error.
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// TODO: smarter timeout logic or someway to cancel (tx not getting committed is a sign of a larger problem!)
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func BroadcastTxCommit(tx types.Tx) (*ctypes.ResultBroadcastTx, error) {
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// subscribe to tx being committed in block
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appendTxResCh := make(chan types.EventDataTx, 1)
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types.AddListenerForEvent(eventSwitch, "rpc", types.EventStringTx(tx), func(data types.TMEventData) {
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appendTxResCh <- data.(types.EventDataTx)
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})
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// broadcast the tx and register checktx callback
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checkTxResCh := make(chan *tmsp.Response, 1)
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err := mempool.CheckTx(tx, func(res *tmsp.Response) {
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checkTxResCh <- res
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})
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if err != nil {
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return nil, fmt.Errorf("Error broadcasting transaction: %v", err)
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}
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checkTxRes := <-checkTxResCh
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checkTxR := checkTxRes.GetCheckTx()
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if r := checkTxR; r.Code != tmsp.CodeType_OK {
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// CheckTx failed!
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return &ctypes.ResultBroadcastTx{
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Code: r.Code,
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Data: r.Data,
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Log: r.Log,
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}, fmt.Errorf("Check tx failed with non-zero code: %s. Data: %X; Log: %s", r.Code.String(), r.Data, r.Log)
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}
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// Wait for the tx to be included in a block,
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// timeout after something reasonable.
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timer := time.NewTimer(60 * 5 * time.Second)
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select {
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case appendTxRes := <-appendTxResCh:
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// The tx was included in a block.
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// NOTE we don't return an error regardless of the AppendTx code;
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// clients must check this to see if they need to send a new tx!
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return &ctypes.ResultBroadcastTx{
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Code: appendTxRes.Code,
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Data: appendTxRes.Result,
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Log: appendTxRes.Log,
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}, nil
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case <-timer.C:
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r := checkTxR
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return &ctypes.ResultBroadcastTx{
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Code: r.Code,
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Data: r.Data,
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Log: r.Log,
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}, fmt.Errorf("Timed out waiting for transaction to be included in a block")
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}
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panic("Should never happen!")
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}
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func UnconfirmedTxs() (*ctypes.ResultUnconfirmedTxs, error) {
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txs := mempool.Reap(-1)
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return &ctypes.ResultUnconfirmedTxs{len(txs), txs}, nil
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}
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func NumUnconfirmedTxs() (*ctypes.ResultUnconfirmedTxs, error) {
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return &ctypes.ResultUnconfirmedTxs{N: mempool.Size()}, nil
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}
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