You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
171 lines
3.6 KiB
171 lines
3.6 KiB
package light_test
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io/ioutil"
|
|
stdlog "log"
|
|
"os"
|
|
"time"
|
|
|
|
dbm "github.com/tendermint/tm-db"
|
|
|
|
"github.com/tendermint/tendermint/abci/example/kvstore"
|
|
"github.com/tendermint/tendermint/libs/log"
|
|
"github.com/tendermint/tendermint/light"
|
|
"github.com/tendermint/tendermint/light/provider"
|
|
httpp "github.com/tendermint/tendermint/light/provider/http"
|
|
dbs "github.com/tendermint/tendermint/light/store/db"
|
|
rpctest "github.com/tendermint/tendermint/rpc/test"
|
|
)
|
|
|
|
// Automatically getting new headers and verifying them.
|
|
func ExampleClient_Update() {
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
conf := rpctest.CreateConfig("ExampleClient_Update")
|
|
|
|
// Start a test application
|
|
app := kvstore.NewApplication()
|
|
_, closer, err := rpctest.StartTendermint(ctx, conf, app, rpctest.SuppressStdout)
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
defer func() { _ = closer(ctx) }()
|
|
|
|
// give Tendermint time to generate some blocks
|
|
time.Sleep(5 * time.Second)
|
|
|
|
dbDir, err := ioutil.TempDir("", "light-client-example")
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(dbDir)
|
|
|
|
chainID := conf.ChainID()
|
|
|
|
primary, err := httpp.New(chainID, conf.RPC.ListenAddress)
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
|
|
block, err := primary.LightBlock(ctx, 2)
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
|
|
db, err := dbm.NewGoLevelDB("light-client-db", dbDir)
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
|
|
c, err := light.NewClient(
|
|
ctx,
|
|
chainID,
|
|
light.TrustOptions{
|
|
Period: 504 * time.Hour, // 21 days
|
|
Height: 2,
|
|
Hash: block.Hash(),
|
|
},
|
|
primary,
|
|
[]provider.Provider{primary}, // NOTE: primary should not be used here
|
|
dbs.New(db),
|
|
light.Logger(log.TestingLogger()),
|
|
)
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
defer func() {
|
|
if err := c.Cleanup(); err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
}()
|
|
|
|
time.Sleep(2 * time.Second)
|
|
|
|
h, err := c.Update(ctx, time.Now())
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
|
|
if h != nil && h.Height > 2 {
|
|
fmt.Println("successful update")
|
|
} else {
|
|
fmt.Println("update failed")
|
|
}
|
|
}
|
|
|
|
// Manually getting light blocks and verifying them.
|
|
func ExampleClient_VerifyLightBlockAtHeight() {
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
conf := rpctest.CreateConfig("ExampleClient_VerifyLightBlockAtHeight")
|
|
|
|
// Start a test application
|
|
app := kvstore.NewApplication()
|
|
|
|
_, closer, err := rpctest.StartTendermint(ctx, conf, app, rpctest.SuppressStdout)
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
defer func() { _ = closer(ctx) }()
|
|
|
|
// give Tendermint time to generate some blocks
|
|
time.Sleep(5 * time.Second)
|
|
|
|
dbDir, err := ioutil.TempDir("", "light-client-example")
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(dbDir)
|
|
|
|
chainID := conf.ChainID()
|
|
|
|
primary, err := httpp.New(chainID, conf.RPC.ListenAddress)
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
|
|
block, err := primary.LightBlock(ctx, 2)
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
|
|
db, err := dbm.NewGoLevelDB("light-client-db", dbDir)
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
|
|
c, err := light.NewClient(ctx,
|
|
chainID,
|
|
light.TrustOptions{
|
|
Period: 504 * time.Hour, // 21 days
|
|
Height: 2,
|
|
Hash: block.Hash(),
|
|
},
|
|
primary,
|
|
[]provider.Provider{primary}, // NOTE: primary should not be used here
|
|
dbs.New(db),
|
|
light.Logger(log.TestingLogger()),
|
|
)
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
defer func() {
|
|
if err := c.Cleanup(); err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
}()
|
|
|
|
_, err = c.VerifyLightBlockAtHeight(context.Background(), 3, time.Now())
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
|
|
h, err := c.TrustedLightBlock(3)
|
|
if err != nil {
|
|
stdlog.Fatal(err)
|
|
}
|
|
|
|
fmt.Println("got header", h.Height)
|
|
}
|