Moved the handlers from stack into modules

2017-07-06 16:00:54 +02:00
parent 768427dcc0
commit a047e210fa
18 changed files with 104 additions and 72 deletions
@@ -0,0 +1,56 @@
+package base
+
+import (
+	"github.com/tendermint/basecoin"
+	"github.com/tendermint/basecoin/errors"
+	"github.com/tendermint/basecoin/stack"
+	"github.com/tendermint/basecoin/state"
+	"github.com/tendermint/basecoin/txs"
+)
+
+//nolint
+const (
+	NameChain = "chan"
+)
+
+// Chain enforces that this tx was bound to the named chain
+type Chain struct {
+	stack.PassOption
+}
+
+// Name of the module - fulfills Middleware interface
+func (Chain) Name() string {
+	return NameChain
+}
+
+var _ stack.Middleware = Chain{}
+
+// CheckTx makes sure we are on the proper chain - fulfills Middlware interface
+func (c Chain) CheckTx(ctx basecoin.Context, store state.KVStore, tx basecoin.Tx, next basecoin.Checker) (res basecoin.Result, err error) {
+	stx, err := c.checkChain(ctx.ChainID(), tx)
+	if err != nil {
+		return res, err
+	}
+	return next.CheckTx(ctx, store, stx)
+}
+
+// DeliverTx makes sure we are on the proper chain - fulfills Middlware interface
+func (c Chain) DeliverTx(ctx basecoin.Context, store state.KVStore, tx basecoin.Tx, next basecoin.Deliver) (res basecoin.Result, err error) {
+	stx, err := c.checkChain(ctx.ChainID(), tx)
+	if err != nil {
+		return res, err
+	}
+	return next.DeliverTx(ctx, store, stx)
+}
+
+// checkChain makes sure the tx is a txs.Chain and
+func (c Chain) checkChain(chainID string, tx basecoin.Tx) (basecoin.Tx, error) {
+	ctx, ok := tx.Unwrap().(*txs.Chain)
+	if !ok {
+		return tx, errors.ErrNoChain()
+	}
+	if ctx.ChainID != chainID {
+		return tx, errors.ErrWrongChain(ctx.ChainID)
+	}
+	return ctx.Tx, nil
+}
@@ -0,0 +1,66 @@
+package base
+
+import (
+	"strconv"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/tendermint/tmlibs/log"
+
+	"github.com/tendermint/basecoin"
+	"github.com/tendermint/basecoin/stack"
+	"github.com/tendermint/basecoin/state"
+	"github.com/tendermint/basecoin/txs"
+)
+
+func TestChain(t *testing.T) {
+	assert := assert.New(t)
+	msg := "got it"
+	chainID := "my-chain"
+
+	raw := txs.NewRaw([]byte{1, 2, 3, 4})
+	cases := []struct {
+		tx       basecoin.Tx
+		valid    bool
+		errorMsg string
+	}{
+		{txs.NewChain(chainID, raw), true, ""},
+		{txs.NewChain("someone-else", raw), false, "someone-else"},
+		{raw, false, "No chain id provided"},
+	}
+
+	// generic args here...
+	ctx := stack.NewContext(chainID, log.NewNopLogger())
+	store := state.NewMemKVStore()
+
+	// build the stack
+	ok := stack.OKHandler{Log: msg}
+	app := stack.New(Chain{}).Use(ok)
+
+	for idx, tc := range cases {
+		i := strconv.Itoa(idx)
+
+		// make sure check returns error, not a panic crash
+		res, err := app.CheckTx(ctx, store, tc.tx)
+		if tc.valid {
+			assert.Nil(err, "%d: %+v", idx, err)
+			assert.Equal(msg, res.Log, i)
+		} else {
+			if assert.NotNil(err, i) {
+				assert.Contains(err.Error(), tc.errorMsg, i)
+			}
+		}
+
+		// make sure deliver returns error, not a panic crash
+		res, err = app.DeliverTx(ctx, store, tc.tx)
+		if tc.valid {
+			assert.Nil(err, "%d: %+v", idx, err)
+			assert.Equal(msg, res.Log, i)
+		} else {
+			if assert.NotNil(err, i) {
+				assert.Contains(err.Error(), tc.errorMsg, i)
+			}
+		}
+	}
+}
@@ -0,0 +1,76 @@
+package base
+
+import (
+	"time"
+
+	"github.com/tendermint/tmlibs/log"
+
+	"github.com/tendermint/basecoin"
+	"github.com/tendermint/basecoin/stack"
+	"github.com/tendermint/basecoin/state"
+)
+
+// nolint
+const (
+	NameLogger = "lggr"
+)
+
+// Logger catches any panics and returns them as errors instead
+type Logger struct{}
+
+// Name of the module - fulfills Middleware interface
+func (Logger) Name() string {
+	return NameLogger
+}
+
+var _ stack.Middleware = Logger{}
+
+// CheckTx logs time and result - fulfills Middlware interface
+func (Logger) CheckTx(ctx basecoin.Context, store state.KVStore, tx basecoin.Tx, next basecoin.Checker) (res basecoin.Result, err error) {
+	start := time.Now()
+	res, err = next.CheckTx(ctx, store, tx)
+	delta := time.Now().Sub(start)
+	// TODO: log some info on the tx itself?
+	l := ctx.With("duration", micros(delta))
+	if err == nil {
+		l.Debug("CheckTx", "log", res.Log)
+	} else {
+		l.Info("CheckTx", "err", err)
+	}
+	return
+}
+
+// DeliverTx logs time and result - fulfills Middlware interface
+func (Logger) DeliverTx(ctx basecoin.Context, store state.KVStore, tx basecoin.Tx, next basecoin.Deliver) (res basecoin.Result, err error) {
+	start := time.Now()
+	res, err = next.DeliverTx(ctx, store, tx)
+	delta := time.Now().Sub(start)
+	// TODO: log some info on the tx itself?
+	l := ctx.With("duration", micros(delta))
+	if err == nil {
+		l.Info("DeliverTx", "log", res.Log)
+	} else {
+		l.Error("DeliverTx", "err", err)
+	}
+	return
+}
+
+// SetOption logs time and result - fulfills Middlware interface
+func (Logger) SetOption(l log.Logger, store state.KVStore, module, key, value string, next basecoin.SetOptioner) (string, error) {
+	start := time.Now()
+	res, err := next.SetOption(l, store, module, key, value)
+	delta := time.Now().Sub(start)
+	// TODO: log the value being set also?
+	l = l.With("duration", micros(delta)).With("mod", module).With("key", key)
+	if err == nil {
+		l.Info("SetOption", "log", res)
+	} else {
+		l.Error("SetOption", "err", err)
+	}
+	return res, err
+}
+
+// micros returns how many microseconds passed in a call
+func micros(d time.Duration) int {
+	return int(d.Seconds() * 1000000)
+}
@@ -0,0 +1,74 @@
+package base
+
+import (
+	"strings"
+
+	wire "github.com/tendermint/go-wire"
+	"github.com/tendermint/go-wire/data"
+
+	"github.com/tendermint/basecoin"
+	"github.com/tendermint/basecoin/stack"
+	"github.com/tendermint/basecoin/state"
+	"github.com/tendermint/basecoin/txs"
+)
+
+//nolint
+const (
+	NameMultiplexer = "mplx"
+)
+
+// Multiplexer grabs a MultiTx and sends them sequentially down the line
+type Multiplexer struct {
+	stack.PassOption
+}
+
+// Name of the module - fulfills Middleware interface
+func (Multiplexer) Name() string {
+	return NameMultiplexer
+}
+
+var _ stack.Middleware = Multiplexer{}
+
+// CheckTx splits the input tx and checks them all - fulfills Middlware interface
+func (Multiplexer) CheckTx(ctx basecoin.Context, store state.KVStore, tx basecoin.Tx, next basecoin.Checker) (res basecoin.Result, err error) {
+	if mtx, ok := tx.Unwrap().(*txs.MultiTx); ok {
+		return runAll(ctx, store, mtx.Txs, next.CheckTx)
+	}
+	return next.CheckTx(ctx, store, tx)
+}
+
+// DeliverTx splits the input tx and checks them all - fulfills Middlware interface
+func (Multiplexer) DeliverTx(ctx basecoin.Context, store state.KVStore, tx basecoin.Tx, next basecoin.Deliver) (res basecoin.Result, err error) {
+	if mtx, ok := tx.Unwrap().(*txs.MultiTx); ok {
+		return runAll(ctx, store, mtx.Txs, next.DeliverTx)
+	}
+	return next.DeliverTx(ctx, store, tx)
+}
+
+func runAll(ctx basecoin.Context, store state.KVStore, txs []basecoin.Tx, next basecoin.CheckerFunc) (res basecoin.Result, err error) {
+	// store all results, unless anything errors
+	rs := make([]basecoin.Result, len(txs))
+	for i, stx := range txs {
+		rs[i], err = next(ctx, store, stx)
+		if err != nil {
+			return
+		}
+	}
+	// now combine the results into one...
+	return combine(rs), nil
+}
+
+// combines all data bytes as a go-wire array.
+// joins all log messages with \n
+func combine(all []basecoin.Result) basecoin.Result {
+	datas := make([]data.Bytes, len(all))
+	logs := make([]string, len(all))
+	for i, r := range all {
+		datas[i] = r.Data
+		logs[i] = r.Log
+	}
+	return basecoin.Result{
+		Data: wire.BinaryBytes(datas),
+		Log:  strings.Join(logs, "\n"),
+	}
+}